如何将数据传递给导航抽屉项目？

Question

我正在使用带有三个项目（时间 sheet、声明、项目）的导航抽屉，我想将 ab 传递给声明。在sheet的时候我有3个活动，ab是在work_detailsactivity.How我可以做些什么来实现这个？

TimeSheet 有 3 个活动（信息（扩展到片段）、劳动力、工作详细信息）

Claims 有 2 个活动（claims（扩展到片段），cameraMain）。

WorkDetails.java

  Button btn1 = (Button) findViewById(R.id.button2);
  btn1.setOnClickListener(new View.OnClickListener() {
            public void onClick(View arg0) {
                AlertDialog.Builder builder = new AlertDialog.Builder(WorkDetailsTable.this);
                builder.setTitle("Data Saved");
                builder.setMessage("Are you sure you want to save?");
                builder.setIcon(android.R.drawable.ic_dialog_alert);
                builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int ii) {
                long ab = ts.insertTimeSheet(name, weather, date, status,b,i);         
               Bundle bundle =new Bundle();
               bundle.putString("ab","ab");
               Claims o=new Claims();
               o.setArguments(bundle);
}

Claims.java

final Long fk=this.getArguments().getLong("ab");
 Button button = (Button) claims.findViewById(R.id.button8);
button.setOnClickListener(new View.OnClickListener() {
            public void onClick(View arg0) {
                Intent intent = new Intent(getActivity().getApplicationContext(), CameraMain.class);
                Toast.makeText(getActivity().getApplicationContext(), fk+"", Toast.LENGTH_LONG).show();
                startActivity(intent);
            }
        });
        return claims;
    }

我是从 Send data from activity to fragment in android 引用的，但是当我 select 领取物品时应用程序崩溃了。

11-02 09:25:55.910 6116-6116/com.example.project.project E/AndroidRuntime﹕ FATAL EXCEPTION: main Process: com.example.project.project, PID: 6116 java.lang.NullPointerException at com.example.project.project.Claims.onCreateView(Claims.java:59) at android.app.Fragment.performCreateView(Fragment.java:1700) at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:890) at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1062) at android.app.BackStackRecord.run(BackStackRecord.java:684) at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1453)

我认为 NullPointException 来自这里

fk=data.getLong("ab");

是否需要在MainActivity中添加参数？

MainActivity.java

mainActivity中的部分代码片段

 private void selectItem(int position) {

            Fragment fragment = null;

            switch (position) {
                case 0:
                    fragment=new Information();
                    break;
                case 1:
                    fragment=new Claims();
                    break;

                case 2:
                    fragment=new Project();

                case 3:
                    fragment=new Report();

                case 4:
                    fragment=new ViewView();

                default:
                    break;
            }

            if (fragment != null) {
                FragmentManager fragmentManager = getFragmentManager();
                fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit();

                mDrawerList.setItemChecked(position, true);
                mDrawerList.setSelection(position);
                setTitle(mNavigationDrawerItemTitles[position]);
                mDrawerLayout.closeDrawer(mDrawerList);

            } else {
                Log.e("MainActivity", "Error in creating fragment");
            }

已编辑

 Button btn1 = (Button) findViewById(R.id.button2);
        btn1.setOnClickListener(new View.OnClickListener() {
            public void onClick(View arg0) {
                AlertDialog.Builder builder = new AlertDialog.Builder(WorkDetailsTable.this);
                builder.setTitle("Data Saved");
                builder.setMessage("Are you sure you want to save?");
                builder.setIcon(android.R.drawable.ic_dialog_alert);
                builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int ii) {
               long ab = ts.insertTimeSheet(name, weather, date, status,b,i);
                Bundle bundle =new Bundle();
                bundle.putLong("ab",ab);
                Claims o=new Claims();
                o.setArguments(bundle);
                }

Claims.java

  Bundle bundle=this.getArguments();
  fk=bundle.getLong("ab");
  button1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(getActivity().getApplicationContext(), fk+"", Toast.LENGTH_LONG).show();
                AlertDialogRadio(a1);


            }
        });

MainActivity

  private void selectItem(int position) {

            Fragment fragment = null;

            switch (position) {
                case 0:
                    fragment=new Information();
                    break;
                case 1:
                    fragment=new Claims();
                    break;

                case 2:
                    fragment=new Project();
                    break;

                case 3:
                    fragment=new Report();
                    break;

                case 4:
                    fragment=new ViewView();

                default:
                    break;
            }

            if (fragment != null) {
                FragmentManager fragmentManager = getFragmentManager();
                if(fragment instanceof Claims)
                {
                    Bundle bundle=new Bundle();
                    bundle.putString("ab","ab");
                    fragment.setArguments(bundle);
                    fragment.setArguments(bundle);
                }

                fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit();

                mDrawerList.setItemChecked(position, true);
                mDrawerList.setSelection(position);
                setTitle(mNavigationDrawerItemTitles[position]);
                mDrawerLayout.closeDrawer(mDrawerList);

            } else {
                Log.e("MainActivity", "Error in creating fragment");
            }
        }
    }

Answer 1

MainActivity

private void selectItem(int position) {

        Fragment fragment = null;

        switch (position) {
            case 0:
                fragment=new Information();
                break;
            case 1:
                fragment=new Claims();
                Bundle bundle=new Bundle();
                bundle.putLong("ab",WorkDetails.ab);
                fragment.setArguments(bundle);
                break;

            case 2:
                fragment=new Project();
                break;

            case 3:
                fragment=new Report();
                break;

            case 4:
                fragment=new ViewView();

            default:
                break;
        }

        if (fragment != null) {
            FragmentManager fragmentManager = getFragmentManager();

            fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit();

            mDrawerList.setItemChecked(position, true);
            mDrawerList.setSelection(position);
            setTitle(mNavigationDrawerItemTitles[position]);
            mDrawerLayout.closeDrawer(mDrawerList);

        } else {
            Log.e("MainActivity", "Error in creating fragment");
        }
    }
}

工作详情

public static long ab=-1;//this is flied ,don't put in the method



Button btn1 = (Button) findViewById(R.id.button2);
btn1.setOnClickListener(new View.OnClickListener() {
    public void onClick(View arg0) {
    AlertDialog.Builder builder = new     AlertDialog.Builder(WorkDetailsTable.this);
    builder.setTitle("Data Saved");
    builder.setMessage("Are you sure you want to save?");
            builder.setIcon(android.R.drawable.ic_dialog_alert);
            builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int ii) {
           ab = ts.insertTimeSheet(name, weather, date, status,b,i);         

}

Answer 2

您可以做的就是将这些数据放在 activity 放置片段的地方。例如。

在你的 activity 长 ab = 12.4;

在你的片段中长数据 = ((YourActivity)getActivity()).ab;

     "OR"

让 ab 喜欢

static long ab = value; // your Details activity

在您的详细信息中 activity 并获取此值

详细信息 activity 名字像

long data = Details.ab //in your claims activity.

Answer 3

当您实例化 Claim Fragment 时，实例化一个 bundle 对象并分配您需要在 bundle 中传递的任何数据，并将其设置为片段的参数。

Bundle bundle = new Bundle();
bundle.putLong("ab",10L);
new Claims().setargument(bundle);

然后在您的 Claim 片段的 onCreateView() 中，您可以访问此包数据作为

 Bundle bundle = getArguments();
 long ab = bundle.getLong("ab");

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