activity 在虚拟设备中运行时强制停止

Question

帮帮我这段代码有什么问题我知道问题出在创建方法上当设置为提交按钮的点击侦听器时当我想要运行虚拟设备中的应用程序时，我会强制停止我该如何解决

public class Addmoney extends AppCompatActivity {
AutoCompleteTextView textv;
Context context = this;
private boolean cansend;
private RadioButton radioCreditor;
private RadioButton radioDebtor;
private Button Commit;
private int as = 0;//1=creditor;2=debtor

@Override

protected void onCreate(Bundle savedInstanceState) {
    radioCreditor = (RadioButton) findViewById(R.id.radiocreditor);
    radioDebtor = (RadioButton) findViewById(R.id.radiocreditor);
    Commit = (Button) findViewById(R.id.btnCommit);




    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_addmoney);
    Button btn = (Button) findViewById(R.id.btcheckid);
    textv = (AutoCompleteTextView) findViewById(R.id.textuser);
    btn.setOnClickListener(new View.OnClickListener() {
        Editable str = textv.getText();

        @Override
        public void onClick(View v) {
            showprogresscheckid(true);
            checkID check = new checkID(str.toString(), context);
            check.execute();
        }
    });
    Commit.setOnClickListener(new View.OnClickListener() {
        Editable str = textv.getText();
        @Override
        public void onClick(View v) {
            checkID check = new checkID(str.toString(), context);
            check.execute();
        }
    });
}

void showprogresscheckid(final boolean turn) {
    ProgressBar pr = (ProgressBar) findViewById(R.id.progressBarcheckid);
    Button bt = (Button) findViewById(R.id.btcheckid);
    bt.setVisibility(turn ? View.GONE : View.VISIBLE);
    pr.setVisibility(turn ? View.VISIBLE : View.GONE);

    return;
}

class checkID extends AsyncTask<Void, Void, Integer> {
    String user;
    String mLink = "http://test.kholaseketab.ir/checkid.php";
    Context contex;

    @Override
    protected void onPostExecute(Integer integer) {
        if (integer == 1) {
            Toast.makeText(context, "ok", Toast.LENGTH_LONG).show();
        }
        if (integer == 0) {
            Toast.makeText(context, "not", Toast.LENGTH_LONG).show();
        } else {
            Toast.makeText(context, "e4", Toast.LENGTH_LONG).show();
        }
        showprogresscheckid(false);
        super.onPostExecute(integer);
    }

    public checkID(String User, Context cnt) {
        super();
        contex = cnt;
        user = User;

    }

    @Override
    protected Integer doInBackground(Void... params) {
        try {
            String data = URLEncoder.encode("user", "UTF8") + "=" + URLEncoder.encode(user, "UTF8");
            URL mylink = new URL(mLink);
            URLConnection connect = mylink.openConnection();

            connect.setDoOutput(true);
            OutputStreamWriter wr = new OutputStreamWriter(connect.getOutputStream());
            wr.write(data);
            wr.flush();


            BufferedReader reader = new BufferedReader(new InputStreamReader(connect.getInputStream()));
            StringBuilder sb = new StringBuilder();
            String res = reader.readLine();
            if (res.trim().equals("ok")) {

                return 1;

            } else if (res.trim().equals("not")) {

                return 0;
            } else {
                return -1;
            }

        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return 0;
    }


}
}

和我的布局 xml 代码：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"


android:background="@mipmap/light"
android:orientation="vertical"
android:gravity="center_vertical">

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="New Text"
    android:id="@+id/test"
    android:layout_gravity="center_horizontal" />

<LinearLayout
    android:orientation="horizontal"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:baselineAligned="false"
    android:layout_gravity="center">

    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="fill_parent"
        android:layout_height="match_parent"
        android:layout_weight="3"
        android:layout_gravity="center_vertical"
        android:gravity="right">

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="check user"
            android:id="@+id/btcheckid"
            android:gravity="center"
            android:layout_gravity="center_vertical|right" />

        <ProgressBar
            style="?android:attr/progressBarStyleSmall"
            android:layout_width="50dp"
            android:layout_height="50dp"
            android:id="@+id/progressBarcheckid"
            android:layout_gravity="center_vertical|right"
            android:visibility="gone" />

    </LinearLayout>

    <android.support.design.widget.TextInputLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:id="@+id/view"
        android:layout_weight="1"
        android:gravity="center">

        <AutoCompleteTextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/textuser"
            android:text="mohsen"
            android:maxLines="1"
            android:singleLine="true" />
    </android.support.design.widget.TextInputLayout>

</LinearLayout>

<LinearLayout
    android:orientation="horizontal"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center">

    <RadioGroup
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        android:orientation="horizontal">

        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Az Creditor"
            android:id="@+id/radiocreditor"
            android:layout_gravity="center_horizontal"
            android:keepScreenOn="false"
            android:enabled="true" />

        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Az Debtor"
            android:id="@+id/radiodebtor"
            android:layout_gravity="center_horizontal" />
    </RadioGroup>

</LinearLayout>

<LinearLayout
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:gravity="center_horizontal">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceSmall"
        android:text="Cost :"
        android:id="@+id/textView2"
        android:layout_gravity="center"
        android:gravity="center" />

    <EditText
        android:layout_width="100dp"
        android:layout_height="wrap_content"
        android:inputType="numberDecimal"
        android:ems="10"
        android:id="@+id/editText"
        android:layout_gravity="left|center"
        android:gravity="fill_horizontal|left"
        android:enabled="true" />
</LinearLayout>

<LinearLayout
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="center" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceSmall"
        android:text="Details :"
        android:id="@+id/textView3"
        android:layout_weight="1"
        android:layout_gravity="center"
        android:gravity="center" />

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="numberDecimal"
        android:ems="10"
        android:id="@+id/editText2"
        android:layout_gravity="center"
        android:layout_weight="1" />
</LinearLayout>

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Commit"
    android:id="@+id/btnCommit"
    android:layout_gravity="center_horizontal" />

Logcat:

 02-03 18:06:41.163 10733-10733/com.example.mohsen158.test1 E/GMPM:      
    GoogleService failed to initialize, status: 10, Missing an expected resource: 'R.string.google_app_id' for initializing Google services.  Possible causes are missing google-services.json or com.google.gms.google-services gradle plugin.
02-03 18:06:41.167 10733-10733/com.example.mohsen158.test1 E/GMPM: Scheduler not set. Not logging error/warn.
02-03 18:06:41.187 10733-10747/com.example.mohsen158.test1 E/GMPM: Uploading is not possible. App measurement disabled
02-03 18:06:41.563 10733-10733/com.example.mohsen158.test1 E/OpenGLRenderer: Getting MAX_TEXTURE_SIZE from GradienCache
02-03 18:06:41.563 10733-10733/com.example.mohsen158.test1 E/OpenGLRenderer: MAX_TEXTURE_SIZE: 16384
02-03 18:06:41.567 10733-10733/com.example.mohsen158.test1 E/OpenGLRenderer: Getting MAX_TEXTURE_SIZE from Caches::initConstraints()
02-03 18:06:41.567 10733-10733/com.example.mohsen158.test1 E/OpenGLRenderer: MAX_TEXTURE_SIZE: 16384
02-03 18:06:44.223 10733-10733/com.example.mohsen158.test1 E/AndroidRuntime: FATAL EXCEPTION: main
                                                                             Process: com.example.mohsen158.test1, PID: 10733
                                                                             java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.mohsen158.test1/com.example.mohsen158.test1.Addmoney}: java.lang.NullPointerException
                                                                                 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
                                                                                 at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
                                                                                 at android.app.ActivityThread.access0(ActivityThread.java:135)
                                                                                 at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
                                                                                 at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                                 at android.os.Looper.loop(Looper.java:136)
                                                                                 at android.app.ActivityThread.main(ActivityThread.java:5017)
                                                                                 at java.lang.reflect.Method.invokeNative(Native Method)
                                                                                 at java.lang.reflect.Method.invoke(Method.java:515)
                                                                                 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
                                                                                 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
                                                                                 at dalvik.system.NativeStart.main(Native Method)
                                                                              Caused by: java.lang.NullPointerException
                                                                                 at com.example.mohsen158.test1.Addmoney.onCreate(Addmoney.java:62)
                                                                                 at android.app.Activity.performCreate(Activity.java:5231)
                                                                                 at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
                                                                                 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
                                                                                 at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245) 
                                                                                 at android.app.ActivityThread.access0(ActivityThread.java:135) 
                                                                                 at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 
                                                                                 at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                                                 at android.os.Looper.loop(Looper.java:136) 
                                                                                 at android.app.ActivityThread.main(ActivityThread.java:5017) 
                                                                                 at java.lang.reflect.Method.invokeNative(Native Method) 
                                                                                 at java.lang.reflect.Method.invoke(Method.java:515) 
                                                                                 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
                                                                                 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
                                                                                 at dalvik.system.NativeStart.main(Native Method)

Answer 1

将这些代码放在 setContentView()

之后

radioCreditor = (RadioButton) findViewById(R.id.radiocreditor);
radioDebtor = (RadioButton) findViewById(R.id.radiocreditor);
Commit = (Button) findViewById(R.id.btnCommit);

在设置 activity 视图之前，您不能使用 findViewById，它不会找到任何 view/controller。

Answer 2

你错过了setContentView.

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.YOUR_XML);
.....

Answer 3

以下 3 行移动

 radioCreditor = (RadioButton) findViewById(R.id.radiocreditor);
    radioDebtor = (RadioButton) findViewById(R.id.radiocreditor);
    Commit = (Button) findViewById(R.id.btnCommit);

在

之后

       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_addmoney);

Answer 4

这两行应该在 onCreate(Bundle savedInstanceState) 方法的顶部，因为如果不膨胀 xml 你将要查找单选按钮，这是错误的步骤，所以在 onCreate()[=11= 中作为起始行移动]

super.onCreate(savedInstanceState);
setContentView(R.layout.activity_addmoney);

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