我可以根据片段名称检索 sqlite 数据吗？
can i retrieve sqlite data depending on fragments name?
嘿，我有 3 个片段（3 个选项卡），我希望第 1 列显示在文本视图选项卡 1 上，第 2 列显示在选项卡 2 上，然后第 3 列显示在我的数据库中的选项卡 3 上？？？
当然，我的片段名称是选项卡 1 2 和 3.. 谢谢 ..！
public class DataBaseHelper 扩展 SQLiteOpenHelper {
public static final String DATABASE_NAME = "big.db";
public static final String TABLE_NAME = "images";
public static final String NAME = "name";
public static final String PLACE = "place";
**public static final Integer FLAG = 1;**
public DataBaseHelper(Context context) {
super(context, DATABASE_NAME, null, 1);
SQLiteDatabase db = this.getWritableDatabase();
}
@Override
public void onCreate(SQLiteDatabase db) {
String CREATE_IMAGES_TABLE = "CREATE TABLE images ( " +
"ID INTEGER PRIMARY KEY AUTOINCREMENT, " +
**"flag INTEGER, " +**
"name TEXT, " +
"place TEXT )";
db.execSQL(CREATE_IMAGES_TABLE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int i, int i1) {
db.execSQL("DROP TABLE IF EXISTS images");
this.onCreate(db);
}
public void insertentry(String name, String place) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(NAME, name);
contentValues.put(PLACE, place);
**contentValues.put(flag,1);**
db.insert(TABLE_NAME, null, contentValues);
db.close();
}
public void insertentry(String name, String place,Integer flag) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(NAME, name);
**contentValues.put(FLAG,flag)**
contentValues.put(PLACE, place);
**contentValues.put(flag,2)**
db.insert(TABLE_NAME, null, contentValues);
db.close();
}
public DbResponse getDataforTab1() {
DbResponse obj = new DbResponse();
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery("select * from " + TABLE_NAME + "where"+FLAG+**"=1 , null);**
if (cursor.getCount() > 0) {
cursor.moveToNext();
obj.name = cursor.getString(cursor.getColumnIndex(NAME));
obj.place = cursor.getString(cursor.getColumnIndex(PLACE));
}
cursor.close();
return obj;
}
}
这是我的片段class每个片段都有相同的代码:
public class Tab1 extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.tab1, container, false);
ImageView imageView = (ImageView) v.findViewById(R.id.img1);
String photoPath = Environment.getExternalStorageDirectory() + "/Download/image1.jpg";
Bitmap bitmap1 = BitmapFactory.decodeFile(photoPath);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;
final Bitmap b = BitmapFactory.decodeFile(photoPath, options);
DataBaseHelper db = new DataBaseHelper(getActivity());
DbResponse response = db.getData();
TextView textView = (TextView)v.findViewById(R.id.txt3);
textView.setText(response.name+" - "+response.place);
imageView.setImageBitmap(b);
return v;
layout1.java
public class Layout1 extends AppCompatActivity implements TabLayout.OnTabSelectedListener {
TabLayout tabLayout;
ViewPager viewPager;
ImageView imageView1, imageView2, imageView3;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_layout1);
tabLayout = (TabLayout) findViewById(R.id.tablayout1);
tabLayout.addTab(tabLayout.newTab().setText("Tab1"));
tabLayout.addTab(tabLayout.newTab().setText("Tab2"));
tabLayout.addTab(tabLayout.newTab().setText("Tab3"));
tabLayout.setTabGravity(tabLayout.GRAVITY_FILL);
viewPager = (ViewPager) findViewById(R.id.viewpager1);
Pager adapter = new Pager(getSupportFragmentManager(), tabLayout.getTabCount());
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
viewPager.setAdapter(adapter);
tabLayout.setOnTabSelectedListener(this);
viewPager.getCurrentItem();
viewPager.setOffscreenPageLimit(3);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab1);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int position = tabLayout.getSelectedTabPosition();
switch (position) {
case 0:
File file = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
String pictureName = "image1" + ".jpg";
// imageName(pictureName);
File imageFile = new File(file, pictureName);
Uri pictureUri = Uri.fromFile(imageFile);
Intent i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
i.putExtra(MediaStore.EXTRA_OUTPUT, pictureUri);
startActivityForResult(i, 0);
break;
case 1:
File file2 = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
String pictureName2 = "image2" + ".jpg";
File imageFile2 = new File(file2, pictureName2);
Uri pictureUri2 = Uri.fromFile(imageFile2);
Intent ii = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
ii.putExtra(MediaStore.EXTRA_OUTPUT, pictureUri2);
startActivityForResult(ii, 1);
break;
case 2:
File file3 = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
String pictureName3 = "image3" + ".jpg";
File imageFile3 = new File(file3, pictureName3);
Uri pictureUri3 = Uri.fromFile(imageFile3);
Intent iii = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
iii.putExtra(MediaStore.EXTRA_OUTPUT, pictureUri3);
startActivityForResult(iii, 2);
break;
}
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
imageView1 = (ImageView) findViewById(R.id.img1);
imageView2 = (ImageView) findViewById(R.id.img2);
imageView3 = (ImageView) findViewById(R.id.img3);
if (requestCode == 0 && resultCode == RESULT_OK) {
String photoPath = Environment.getExternalStorageDirectory() + "/Download/image1.jpg";
galleryAddPic(photoPath);
Bitmap bitmap1 = BitmapFactory.decodeFile(photoPath);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;
final Bitmap b = BitmapFactory.decodeFile(photoPath, options);
imageView1.setImageBitmap(b);
imageView1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
imageView1.buildDrawingCache();
Bitmap image = imageView1.getDrawingCache();
Bundle extras = new Bundle();
Intent o = new Intent(Layout1.this, Information.class);
extras.putParcelable("Bitmap", image);
o.putExtras(extras);
startActivity(o);
}
});
} else if (requestCode == 1 && resultCode == RESULT_OK) {
String photoPath = Environment.getExternalStorageDirectory() + "/Download/image2.jpg";
galleryAddPic(photoPath);
Bitmap bitmap2 = BitmapFactory.decodeFile(photoPath);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;
final Bitmap b2 = BitmapFactory.decodeFile(photoPath, options);
imageView2.setImageBitmap(b2);
imageView2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
imageView2.buildDrawingCache();
Bitmap image = imageView2.getDrawingCache();
Bundle extras = new Bundle();
Intent o = new Intent(Layout1.this, Information.class);
extras.putParcelable("Bitmap", image);
o.putExtras(extras);
startActivity(o);
}
});
} else if (requestCode == 2 && resultCode == RESULT_OK) {
String photoPath = Environment.getExternalStorageDirectory() + "/Download/image3.jpg";
galleryAddPic(photoPath);
Bitmap bitmap3 = BitmapFactory.decodeFile(photoPath);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;
final Bitmap b3 = BitmapFactory.decodeFile(photoPath, options);
imageView3.setImageBitmap(b3);
imageView3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
imageView3.buildDrawingCache();
Bitmap image = imageView3.getDrawingCache();
Bundle extras = new Bundle();
Intent o = new Intent(Layout1.this, Information.class);
extras.putParcelable("Bitmap", image);
o.putExtras(extras);
startActivity(o);
}
});
}
}
private void galleryAddPic(String photoPath) {
Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
File f = new File(photoPath);
Uri contentUri = Uri.fromFile(f);
mediaScanIntent.setData(contentUri);
this.sendBroadcast(mediaScanIntent);
}
@Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
}
information.java
public class Information extends AppCompatActivity {
EditText text1,text2 ;
Button btn;
DataBaseHelper dataBaseHelper;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_information);
text1 = (EditText) findViewById(R.id.txt1);
text2 = (EditText) findViewById(R.id.txt2);
ImageView oo= (ImageView)findViewById(R.id.imageView99);
btn = (Button) findViewById(R.id.btn1);
Log.d("CLick", "123 INFO SAVED");
addData();
dataBaseHelper = new DataBaseHelper(this);
Bundle extras = getIntent().getExtras();
Bitmap bmp = (Bitmap) extras.getParcelable("Bitmap");
oo.setImageBitmap(bmp);
}
public void addData(){
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
dataBaseHelper.insertentry(text1.getText().toString(),text2.getText().toString());
Toast.makeText(getApplicationContext(),"doneeeee",
Toast.LENGTH_LONG).show();
Intent b = new Intent(Information.this,Layout1.class);
startActivity(b);
}
});
}
日志猫：
09-13 15:35:42.550 22723-22723/com.example.mike.bigone12 E/SQLiteLog: (1) no such column: flag
09-13 15:35:42.550 22723-22723/com.example.mike.bigone12 D/AndroidRuntime: Shutting down VM
09-13 15:35:42.550 22723-22723/com.example.mike.bigone12 W/dalvikvm: threadid=1: thread exiting with uncaught exception (group=0x41ab0270)
09-13 15:35:42.560 22723-22723/com.example.mike.bigone12 E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.mike.bigone12, PID: 22723
android.database.sqlite.SQLiteException: no such column: flag (code 1): , while compiling: SELECT * FROM images WHERE flag =1
at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:889)
at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:500)
at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37)
at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:44)
at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1314)
at android.database.sqlite.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1253)
at com.example.mike.bigone12.DataBaseHelper.getDataforTab1(DataBaseHelper.java:70)
at com.example.mike.bigone12.Tab1.onCreateView(Tab1.java:33)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:2074)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1286)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:758)
at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:1632)
at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:637)
at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:166)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1235)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1083)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1609)
at android.view.View.measure(View.java:16518)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:719)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:455)
at android.view.View.measure(View.java:16518)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:135)
at android.view.View.measure(View.java:16518)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.support.v7.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:391)
at android.view.View.measure(View.java:16518)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:16518)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:16518)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2410)
at android.view.View.measure(View.java:16518)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1921)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1114)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1296)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1001)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5680)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
at android.view.Choreographer.doCallbacks(Choreographer.java:574)
at android.view.Choreographer.doFrame(Choreographer.java:544)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
at an
我为每个标签获取相同的信息我希望每个标签都有自己的信息！
只需使用 currentFragment.getClass().getName();获取片段名称并使用此名称查询您的数据库
DbResponse response = db.getData(currentFragment.getClass().getName());
然后
public DbResponse getData(String tabname) {
DbResponse obj = new DbResponse();
SQLiteDatabase db = this.getWritableDatabase();
if(tabname.equals("Tab1")){
Cursor cursor = db.rawQuery("select column1 from " + TABLE_NAME, null);
}
else if(tabname.equals("Tab2")){
Cursor cursor = db.rawQuery("select column2 from " + TABLE_NAME, null);
}
else if(tabname.equals("Tab3")){
Cursor cursor = db.rawQuery("select column3 from " + TABLE_NAME, null);
}
if (cursor.getCount() > 0) {
cursor.moveToNext();
obj.name = cursor.getString(cursor.getColumnIndex(NAME));
obj.place = cursor.getString(cursor.getColumnIndex(PLACE));
}
cursor.close();
return obj;
}
类似的东西
在 table 中使用整数数据类型创建一个字段和一个附加字段 插入时：
在你的activity中：
public class Layout1 extends AppCompatActivity implements TabLayout.OnTabSelectedListener {
TabLayout tabLayout;
ViewPager viewPager;
ImageView imageView1, imageView2, imageView3;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_layout1);
tabLayout = (TabLayout) findViewById(R.id.tablayout1);
tabLayout.addTab(tabLayout.newTab().setText("Tab1"));
tabLayout.addTab(tabLayout.newTab().setText("Tab2"));
tabLayout.addTab(tabLayout.newTab().setText("Tab3"));
tabLayout.setTabGravity(tabLayout.GRAVITY_FILL);
viewPager = (ViewPager) findViewById(R.id.viewpager1);
Pager adapter = new Pager(getSupportFragmentManager(), tabLayout.getTabCount());
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
viewPager.setAdapter(adapter);
tabLayout.setOnTabSelectedListener(this);
viewPager.getCurrentItem();
viewPager.setOffscreenPageLimit(3);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab1);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int position = tabLayout.getSelectedTabPosition();
switch (position) {
case 0:
File file = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
String pictureName = "image1" + ".jpg";
// imageName(pictureName);
File imageFile = new File(file, pictureName);
Uri pictureUri = Uri.fromFile(imageFile);
Intent i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
i.putExtra(MediaStore.EXTRA_OUTPUT, pictureUri);
startActivityForResult(i, 0);
break;
case 1:
File file2 = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
String pictureName2 = "image2" + ".jpg";
File imageFile2 = new File(file2, pictureName2);
Uri pictureUri2 = Uri.fromFile(imageFile2);
Intent ii = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
ii.putExtra(MediaStore.EXTRA_OUTPUT, pictureUri2);
startActivityForResult(ii, 1);
break;
case 2:
File file3 = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
String pictureName3 = "image3" + ".jpg";
File imageFile3 = new File(file3, pictureName3);
Uri pictureUri3 = Uri.fromFile(imageFile3);
Intent iii = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
iii.putExtra(MediaStore.EXTRA_OUTPUT, pictureUri3);
startActivityForResult(iii, 2);
break;
}
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
imageView1 = (ImageView) findViewById(R.id.img1);
imageView2 = (ImageView) findViewById(R.id.img2);
imageView3 = (ImageView) findViewById(R.id.img3);
if (requestCode == 0 && resultCode == RESULT_OK) {
String photoPath = Environment.getExternalStorageDirectory() + "/Download/image1.jpg";
galleryAddPic(photoPath);
Bitmap bitmap1 = BitmapFactory.decodeFile(photoPath);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;
final Bitmap b = BitmapFactory.decodeFile(photoPath, options);
imageView1.setImageBitmap(b);
imageView1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
imageView1.buildDrawingCache();
Bitmap image = imageView1.getDrawingCache();
Bundle extras = new Bundle();
Intent o = new Intent(Layout1.this, Information.class);
extras.putParcelable("Bitmap", image);
extras.putInt("flag",1);
o.putExtras(extras);
startActivity(o);
}
});
} else if (requestCode == 1 && resultCode == RESULT_OK) {
String photoPath = Environment.getExternalStorageDirectory() + "/Download/image2.jpg";
galleryAddPic(photoPath);
Bitmap bitmap2 = BitmapFactory.decodeFile(photoPath);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;
final Bitmap b2 = BitmapFactory.decodeFile(photoPath, options);
imageView2.setImageBitmap(b2);
imageView2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
imageView2.buildDrawingCache();
Bitmap image = imageView2.getDrawingCache();
Bundle extras = new Bundle();
Intent o = new Intent(Layout1.this, Information.class);
extras.putParcelable("Bitmap", image);
extras.putInt("flag",2);
o.putExtras(extras);
startActivity(o);
}
});
} else if (requestCode == 2 && resultCode == RESULT_OK) {
String photoPath = Environment.getExternalStorageDirectory() + "/Download/image3.jpg";
galleryAddPic(photoPath);
Bitmap bitmap3 = BitmapFactory.decodeFile(photoPath);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;
final Bitmap b3 = BitmapFactory.decodeFile(photoPath, options);
imageView3.setImageBitmap(b3);
imageView3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
imageView3.buildDrawingCache();
Bitmap image = imageView3.getDrawingCache();
Bundle extras = new Bundle();
Intent o = new Intent(Layout1.this, Information.class);
extras.putParcelable("Bitmap", image);
extras.putInt("flag",3);
o.putExtras(extras);
startActivity(o);
}
});
}
}
private void galleryAddPic(String photoPath) {
Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
File f = new File(photoPath);
Uri contentUri = Uri.fromFile(f);
mediaScanIntent.setData(contentUri);
this.sendBroadcast(mediaScanIntent);
}
@Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
}
在您的信息中Activity：
public class Information extends AppCompatActivity {
EditText text1,text2 ;
Button btn;
Integer flag;
DataBaseHelper dataBaseHelper;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_information);
text1 = (EditText) findViewById(R.id.txt1);
text2 = (EditText) findViewById(R.id.txt2);
ImageView oo= (ImageView)findViewById(R.id.imageView99);
btn = (Button) findViewById(R.id.btn1);
Log.d("CLick", "123 INFO SAVED");
dataBaseHelper = new DataBaseHelper(this);
Bundle extras = getIntent().getExtras();
Bitmap bmp = (Bitmap) extras.getParcelable("Bitmap");
flag=extras.getInt("flag");
oo.setImageBitmap(bmp)'
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
dataBaseHelper.insertentry(text1.getText().toString(),text2.getText().toString(),flag);
Toast.makeText(getApplicationContext(),"doneeeee",
Toast.LENGTH_LONG).show();
Intent b = new Intent(Information.this,Layout1.class);
startActivity(b);
}
});
}
就像你的第三个标签一样，你在插入时放了 3 然后在调用第一个标签的方法时你可以这样查询：
public class DataBaseHelper extends SQLiteOpenHelper {
public static final String DATABASE_NAME = "big.db";
public static final String TABLE_NAME = "images";
public static final String NAME = "name";
public static final String PLACE = "place";
public static final String FLAG ="flag";
public DataBaseHelper(Context context) {
super(context, DATABASE_NAME, null, 1);
SQLiteDatabase db = this.getWritableDatabase();
}
@Override
public void onCreate(SQLiteDatabase db) {
String CREATE_IMAGES_TABLE = "CREATE TABLE images ( " +
"ID INTEGER PRIMARY KEY AUTOINCREMENT, " +
"flag INTEGER, " +
"name TEXT, " +
"place TEXT )";
db.execSQL(CREATE_IMAGES_TABLE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int i, int i1) {
db.execSQL("DROP TABLE IF EXISTS images");
this.onCreate(db);
}
public void insertentry(String name, String place,Integer flag) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(NAME, name);
contentValues.put(FLAG,flag)
contentValues.put(PLACE, place);
db.insert(TABLE_NAME, null, contentValues);
db.close();
}
public DbResponse getDataforTab1() {
DbResponse obj = new DbResponse();
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery("SELECT * FROM " + Table_Name + " WHERE " + FLAG + " =" + 1 + "",null);
if (cursor.getCount() > 0) {
cursor.moveToNext();
obj.name = cursor.getString(cursor.getColumnIndex(NAME));
obj.place = cursor.getString(cursor.getColumnIndex(PLACE));
}
cursor.close();
return obj;
}
//in 2nd Tab
public DbResponse getDataforTab3() {
DbResponse obj = new DbResponse();
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery("select * from " + TABLE_NAME + "where"+FLAG+"=2 , null);
if (cursor.getCount() > 0) {
cursor.moveToNext();
obj.name = cursor.getString(cursor.getColumnIndex(NAME));
obj.place = cursor.getString(cursor.getColumnIndex(PLACE));
}
cursor.close();
return obj;
}
In 3rd Tab:
public DbResponse getDataforTab3() {
DbResponse obj = new DbResponse();
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery("select * from " + TABLE_NAME + "where"+FLAG+"=3, null);
if (cursor.getCount() > 0) {
cursor.moveToNext();
obj.name = cursor.getString(cursor.getColumnIndex(NAME));
obj.place = cursor.getString(cursor.getColumnIndex(PLACE));
}
cursor.close();
return obj;
}
您的 DBHelper Class:
就像你可以在你的片段中调用这个方法你可以将它设置为你的textview任何疑问都可以问
嘿，我有 3 个片段（3 个选项卡），我希望第 1 列显示在文本视图选项卡 1 上，第 2 列显示在选项卡 2 上，然后第 3 列显示在我的数据库中的选项卡 3 上？？？
当然，我的片段名称是选项卡 1 2 和 3.. 谢谢 ..！
public class DataBaseHelper 扩展 SQLiteOpenHelper {
public static final String DATABASE_NAME = "big.db";
public static final String TABLE_NAME = "images";
public static final String NAME = "name";
public static final String PLACE = "place";
**public static final Integer FLAG = 1;**
public DataBaseHelper(Context context) {
super(context, DATABASE_NAME, null, 1);
SQLiteDatabase db = this.getWritableDatabase();
}
@Override
public void onCreate(SQLiteDatabase db) {
String CREATE_IMAGES_TABLE = "CREATE TABLE images ( " +
"ID INTEGER PRIMARY KEY AUTOINCREMENT, " +
**"flag INTEGER, " +**
"name TEXT, " +
"place TEXT )";
db.execSQL(CREATE_IMAGES_TABLE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int i, int i1) {
db.execSQL("DROP TABLE IF EXISTS images");
this.onCreate(db);
}
public void insertentry(String name, String place) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(NAME, name);
contentValues.put(PLACE, place);
**contentValues.put(flag,1);**
db.insert(TABLE_NAME, null, contentValues);
db.close();
}
public void insertentry(String name, String place,Integer flag) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(NAME, name);
**contentValues.put(FLAG,flag)**
contentValues.put(PLACE, place);
**contentValues.put(flag,2)**
db.insert(TABLE_NAME, null, contentValues);
db.close();
}
public DbResponse getDataforTab1() {
DbResponse obj = new DbResponse();
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery("select * from " + TABLE_NAME + "where"+FLAG+**"=1 , null);**
if (cursor.getCount() > 0) {
cursor.moveToNext();
obj.name = cursor.getString(cursor.getColumnIndex(NAME));
obj.place = cursor.getString(cursor.getColumnIndex(PLACE));
}
cursor.close();
return obj;
}
}
这是我的片段class每个片段都有相同的代码:
public class Tab1 extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.tab1, container, false);
ImageView imageView = (ImageView) v.findViewById(R.id.img1);
String photoPath = Environment.getExternalStorageDirectory() + "/Download/image1.jpg";
Bitmap bitmap1 = BitmapFactory.decodeFile(photoPath);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;
final Bitmap b = BitmapFactory.decodeFile(photoPath, options);
DataBaseHelper db = new DataBaseHelper(getActivity());
DbResponse response = db.getData();
TextView textView = (TextView)v.findViewById(R.id.txt3);
textView.setText(response.name+" - "+response.place);
imageView.setImageBitmap(b);
return v;
layout1.java
public class Layout1 extends AppCompatActivity implements TabLayout.OnTabSelectedListener {
TabLayout tabLayout;
ViewPager viewPager;
ImageView imageView1, imageView2, imageView3;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_layout1);
tabLayout = (TabLayout) findViewById(R.id.tablayout1);
tabLayout.addTab(tabLayout.newTab().setText("Tab1"));
tabLayout.addTab(tabLayout.newTab().setText("Tab2"));
tabLayout.addTab(tabLayout.newTab().setText("Tab3"));
tabLayout.setTabGravity(tabLayout.GRAVITY_FILL);
viewPager = (ViewPager) findViewById(R.id.viewpager1);
Pager adapter = new Pager(getSupportFragmentManager(), tabLayout.getTabCount());
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
viewPager.setAdapter(adapter);
tabLayout.setOnTabSelectedListener(this);
viewPager.getCurrentItem();
viewPager.setOffscreenPageLimit(3);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab1);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int position = tabLayout.getSelectedTabPosition();
switch (position) {
case 0:
File file = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
String pictureName = "image1" + ".jpg";
// imageName(pictureName);
File imageFile = new File(file, pictureName);
Uri pictureUri = Uri.fromFile(imageFile);
Intent i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
i.putExtra(MediaStore.EXTRA_OUTPUT, pictureUri);
startActivityForResult(i, 0);
break;
case 1:
File file2 = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
String pictureName2 = "image2" + ".jpg";
File imageFile2 = new File(file2, pictureName2);
Uri pictureUri2 = Uri.fromFile(imageFile2);
Intent ii = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
ii.putExtra(MediaStore.EXTRA_OUTPUT, pictureUri2);
startActivityForResult(ii, 1);
break;
case 2:
File file3 = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
String pictureName3 = "image3" + ".jpg";
File imageFile3 = new File(file3, pictureName3);
Uri pictureUri3 = Uri.fromFile(imageFile3);
Intent iii = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
iii.putExtra(MediaStore.EXTRA_OUTPUT, pictureUri3);
startActivityForResult(iii, 2);
break;
}
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
imageView1 = (ImageView) findViewById(R.id.img1);
imageView2 = (ImageView) findViewById(R.id.img2);
imageView3 = (ImageView) findViewById(R.id.img3);
if (requestCode == 0 && resultCode == RESULT_OK) {
String photoPath = Environment.getExternalStorageDirectory() + "/Download/image1.jpg";
galleryAddPic(photoPath);
Bitmap bitmap1 = BitmapFactory.decodeFile(photoPath);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;
final Bitmap b = BitmapFactory.decodeFile(photoPath, options);
imageView1.setImageBitmap(b);
imageView1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
imageView1.buildDrawingCache();
Bitmap image = imageView1.getDrawingCache();
Bundle extras = new Bundle();
Intent o = new Intent(Layout1.this, Information.class);
extras.putParcelable("Bitmap", image);
o.putExtras(extras);
startActivity(o);
}
});
} else if (requestCode == 1 && resultCode == RESULT_OK) {
String photoPath = Environment.getExternalStorageDirectory() + "/Download/image2.jpg";
galleryAddPic(photoPath);
Bitmap bitmap2 = BitmapFactory.decodeFile(photoPath);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;
final Bitmap b2 = BitmapFactory.decodeFile(photoPath, options);
imageView2.setImageBitmap(b2);
imageView2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
imageView2.buildDrawingCache();
Bitmap image = imageView2.getDrawingCache();
Bundle extras = new Bundle();
Intent o = new Intent(Layout1.this, Information.class);
extras.putParcelable("Bitmap", image);
o.putExtras(extras);
startActivity(o);
}
});
} else if (requestCode == 2 && resultCode == RESULT_OK) {
String photoPath = Environment.getExternalStorageDirectory() + "/Download/image3.jpg";
galleryAddPic(photoPath);
Bitmap bitmap3 = BitmapFactory.decodeFile(photoPath);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;
final Bitmap b3 = BitmapFactory.decodeFile(photoPath, options);
imageView3.setImageBitmap(b3);
imageView3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
imageView3.buildDrawingCache();
Bitmap image = imageView3.getDrawingCache();
Bundle extras = new Bundle();
Intent o = new Intent(Layout1.this, Information.class);
extras.putParcelable("Bitmap", image);
o.putExtras(extras);
startActivity(o);
}
});
}
}
private void galleryAddPic(String photoPath) {
Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
File f = new File(photoPath);
Uri contentUri = Uri.fromFile(f);
mediaScanIntent.setData(contentUri);
this.sendBroadcast(mediaScanIntent);
}
@Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
}
information.java
public class Information extends AppCompatActivity {
EditText text1,text2 ;
Button btn;
DataBaseHelper dataBaseHelper;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_information);
text1 = (EditText) findViewById(R.id.txt1);
text2 = (EditText) findViewById(R.id.txt2);
ImageView oo= (ImageView)findViewById(R.id.imageView99);
btn = (Button) findViewById(R.id.btn1);
Log.d("CLick", "123 INFO SAVED");
addData();
dataBaseHelper = new DataBaseHelper(this);
Bundle extras = getIntent().getExtras();
Bitmap bmp = (Bitmap) extras.getParcelable("Bitmap");
oo.setImageBitmap(bmp);
}
public void addData(){
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
dataBaseHelper.insertentry(text1.getText().toString(),text2.getText().toString());
Toast.makeText(getApplicationContext(),"doneeeee",
Toast.LENGTH_LONG).show();
Intent b = new Intent(Information.this,Layout1.class);
startActivity(b);
}
});
}
日志猫：
09-13 15:35:42.550 22723-22723/com.example.mike.bigone12 E/SQLiteLog: (1) no such column: flag
09-13 15:35:42.550 22723-22723/com.example.mike.bigone12 D/AndroidRuntime: Shutting down VM
09-13 15:35:42.550 22723-22723/com.example.mike.bigone12 W/dalvikvm: threadid=1: thread exiting with uncaught exception (group=0x41ab0270)
09-13 15:35:42.560 22723-22723/com.example.mike.bigone12 E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.mike.bigone12, PID: 22723
android.database.sqlite.SQLiteException: no such column: flag (code 1): , while compiling: SELECT * FROM images WHERE flag =1
at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:889)
at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:500)
at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37)
at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:44)
at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1314)
at android.database.sqlite.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1253)
at com.example.mike.bigone12.DataBaseHelper.getDataforTab1(DataBaseHelper.java:70)
at com.example.mike.bigone12.Tab1.onCreateView(Tab1.java:33)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:2074)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1286)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:758)
at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:1632)
at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:637)
at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:166)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1235)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1083)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1609)
at android.view.View.measure(View.java:16518)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:719)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:455)
at android.view.View.measure(View.java:16518)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:135)
at android.view.View.measure(View.java:16518)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.support.v7.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:391)
at android.view.View.measure(View.java:16518)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:16518)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:16518)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2410)
at android.view.View.measure(View.java:16518)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1921)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1114)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1296)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1001)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5680)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
at android.view.Choreographer.doCallbacks(Choreographer.java:574)
at android.view.Choreographer.doFrame(Choreographer.java:544)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
at an
我为每个标签获取相同的信息我希望每个标签都有自己的信息！
只需使用 currentFragment.getClass().getName();获取片段名称并使用此名称查询您的数据库
DbResponse response = db.getData(currentFragment.getClass().getName());
然后
public DbResponse getData(String tabname) {
DbResponse obj = new DbResponse();
SQLiteDatabase db = this.getWritableDatabase();
if(tabname.equals("Tab1")){
Cursor cursor = db.rawQuery("select column1 from " + TABLE_NAME, null);
}
else if(tabname.equals("Tab2")){
Cursor cursor = db.rawQuery("select column2 from " + TABLE_NAME, null);
}
else if(tabname.equals("Tab3")){
Cursor cursor = db.rawQuery("select column3 from " + TABLE_NAME, null);
}
if (cursor.getCount() > 0) {
cursor.moveToNext();
obj.name = cursor.getString(cursor.getColumnIndex(NAME));
obj.place = cursor.getString(cursor.getColumnIndex(PLACE));
}
cursor.close();
return obj;
}
类似的东西
在 table 中使用整数数据类型创建一个字段和一个附加字段 插入时：
在你的activity中：
public class Layout1 extends AppCompatActivity implements TabLayout.OnTabSelectedListener {
TabLayout tabLayout;
ViewPager viewPager;
ImageView imageView1, imageView2, imageView3;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_layout1);
tabLayout = (TabLayout) findViewById(R.id.tablayout1);
tabLayout.addTab(tabLayout.newTab().setText("Tab1"));
tabLayout.addTab(tabLayout.newTab().setText("Tab2"));
tabLayout.addTab(tabLayout.newTab().setText("Tab3"));
tabLayout.setTabGravity(tabLayout.GRAVITY_FILL);
viewPager = (ViewPager) findViewById(R.id.viewpager1);
Pager adapter = new Pager(getSupportFragmentManager(), tabLayout.getTabCount());
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
viewPager.setAdapter(adapter);
tabLayout.setOnTabSelectedListener(this);
viewPager.getCurrentItem();
viewPager.setOffscreenPageLimit(3);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab1);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int position = tabLayout.getSelectedTabPosition();
switch (position) {
case 0:
File file = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
String pictureName = "image1" + ".jpg";
// imageName(pictureName);
File imageFile = new File(file, pictureName);
Uri pictureUri = Uri.fromFile(imageFile);
Intent i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
i.putExtra(MediaStore.EXTRA_OUTPUT, pictureUri);
startActivityForResult(i, 0);
break;
case 1:
File file2 = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
String pictureName2 = "image2" + ".jpg";
File imageFile2 = new File(file2, pictureName2);
Uri pictureUri2 = Uri.fromFile(imageFile2);
Intent ii = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
ii.putExtra(MediaStore.EXTRA_OUTPUT, pictureUri2);
startActivityForResult(ii, 1);
break;
case 2:
File file3 = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
String pictureName3 = "image3" + ".jpg";
File imageFile3 = new File(file3, pictureName3);
Uri pictureUri3 = Uri.fromFile(imageFile3);
Intent iii = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
iii.putExtra(MediaStore.EXTRA_OUTPUT, pictureUri3);
startActivityForResult(iii, 2);
break;
}
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
imageView1 = (ImageView) findViewById(R.id.img1);
imageView2 = (ImageView) findViewById(R.id.img2);
imageView3 = (ImageView) findViewById(R.id.img3);
if (requestCode == 0 && resultCode == RESULT_OK) {
String photoPath = Environment.getExternalStorageDirectory() + "/Download/image1.jpg";
galleryAddPic(photoPath);
Bitmap bitmap1 = BitmapFactory.decodeFile(photoPath);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;
final Bitmap b = BitmapFactory.decodeFile(photoPath, options);
imageView1.setImageBitmap(b);
imageView1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
imageView1.buildDrawingCache();
Bitmap image = imageView1.getDrawingCache();
Bundle extras = new Bundle();
Intent o = new Intent(Layout1.this, Information.class);
extras.putParcelable("Bitmap", image);
extras.putInt("flag",1);
o.putExtras(extras);
startActivity(o);
}
});
} else if (requestCode == 1 && resultCode == RESULT_OK) {
String photoPath = Environment.getExternalStorageDirectory() + "/Download/image2.jpg";
galleryAddPic(photoPath);
Bitmap bitmap2 = BitmapFactory.decodeFile(photoPath);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;
final Bitmap b2 = BitmapFactory.decodeFile(photoPath, options);
imageView2.setImageBitmap(b2);
imageView2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
imageView2.buildDrawingCache();
Bitmap image = imageView2.getDrawingCache();
Bundle extras = new Bundle();
Intent o = new Intent(Layout1.this, Information.class);
extras.putParcelable("Bitmap", image);
extras.putInt("flag",2);
o.putExtras(extras);
startActivity(o);
}
});
} else if (requestCode == 2 && resultCode == RESULT_OK) {
String photoPath = Environment.getExternalStorageDirectory() + "/Download/image3.jpg";
galleryAddPic(photoPath);
Bitmap bitmap3 = BitmapFactory.decodeFile(photoPath);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;
final Bitmap b3 = BitmapFactory.decodeFile(photoPath, options);
imageView3.setImageBitmap(b3);
imageView3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
imageView3.buildDrawingCache();
Bitmap image = imageView3.getDrawingCache();
Bundle extras = new Bundle();
Intent o = new Intent(Layout1.this, Information.class);
extras.putParcelable("Bitmap", image);
extras.putInt("flag",3);
o.putExtras(extras);
startActivity(o);
}
});
}
}
private void galleryAddPic(String photoPath) {
Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
File f = new File(photoPath);
Uri contentUri = Uri.fromFile(f);
mediaScanIntent.setData(contentUri);
this.sendBroadcast(mediaScanIntent);
}
@Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
}
在您的信息中Activity：
public class Information extends AppCompatActivity {
EditText text1,text2 ;
Button btn;
Integer flag;
DataBaseHelper dataBaseHelper;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_information);
text1 = (EditText) findViewById(R.id.txt1);
text2 = (EditText) findViewById(R.id.txt2);
ImageView oo= (ImageView)findViewById(R.id.imageView99);
btn = (Button) findViewById(R.id.btn1);
Log.d("CLick", "123 INFO SAVED");
dataBaseHelper = new DataBaseHelper(this);
Bundle extras = getIntent().getExtras();
Bitmap bmp = (Bitmap) extras.getParcelable("Bitmap");
flag=extras.getInt("flag");
oo.setImageBitmap(bmp)'
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
dataBaseHelper.insertentry(text1.getText().toString(),text2.getText().toString(),flag);
Toast.makeText(getApplicationContext(),"doneeeee",
Toast.LENGTH_LONG).show();
Intent b = new Intent(Information.this,Layout1.class);
startActivity(b);
}
});
}
就像你的第三个标签一样，你在插入时放了 3 然后在调用第一个标签的方法时你可以这样查询：
public class DataBaseHelper extends SQLiteOpenHelper {
public static final String DATABASE_NAME = "big.db";
public static final String TABLE_NAME = "images";
public static final String NAME = "name";
public static final String PLACE = "place";
public static final String FLAG ="flag";
public DataBaseHelper(Context context) {
super(context, DATABASE_NAME, null, 1);
SQLiteDatabase db = this.getWritableDatabase();
}
@Override
public void onCreate(SQLiteDatabase db) {
String CREATE_IMAGES_TABLE = "CREATE TABLE images ( " +
"ID INTEGER PRIMARY KEY AUTOINCREMENT, " +
"flag INTEGER, " +
"name TEXT, " +
"place TEXT )";
db.execSQL(CREATE_IMAGES_TABLE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int i, int i1) {
db.execSQL("DROP TABLE IF EXISTS images");
this.onCreate(db);
}
public void insertentry(String name, String place,Integer flag) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(NAME, name);
contentValues.put(FLAG,flag)
contentValues.put(PLACE, place);
db.insert(TABLE_NAME, null, contentValues);
db.close();
}
public DbResponse getDataforTab1() {
DbResponse obj = new DbResponse();
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery("SELECT * FROM " + Table_Name + " WHERE " + FLAG + " =" + 1 + "",null);
if (cursor.getCount() > 0) {
cursor.moveToNext();
obj.name = cursor.getString(cursor.getColumnIndex(NAME));
obj.place = cursor.getString(cursor.getColumnIndex(PLACE));
}
cursor.close();
return obj;
}
//in 2nd Tab
public DbResponse getDataforTab3() {
DbResponse obj = new DbResponse();
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery("select * from " + TABLE_NAME + "where"+FLAG+"=2 , null);
if (cursor.getCount() > 0) {
cursor.moveToNext();
obj.name = cursor.getString(cursor.getColumnIndex(NAME));
obj.place = cursor.getString(cursor.getColumnIndex(PLACE));
}
cursor.close();
return obj;
}
In 3rd Tab:
public DbResponse getDataforTab3() {
DbResponse obj = new DbResponse();
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery("select * from " + TABLE_NAME + "where"+FLAG+"=3, null);
if (cursor.getCount() > 0) {
cursor.moveToNext();
obj.name = cursor.getString(cursor.getColumnIndex(NAME));
obj.place = cursor.getString(cursor.getColumnIndex(PLACE));
}
cursor.close();
return obj;
}
您的 DBHelper Class:
就像你可以在你的片段中调用这个方法你可以将它设置为你的textview任何疑问都可以问