如何将数据传递到导航抽屉项目？

Question

I am using a nav drawer with three items(Time sheet, claims, project) and I would like to pass ab to claims. In time sheet I have 3 activities, the ab is in the work_details activity.How can I do to achieve this?

TimeSheet has 3 activities (Information(extend to fragment),work force,work details)

Claims has 2 activities(claims(extend to fragment), 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;
    }

I refer from Send data from activity to fragment in android but the app crashed when I select claims item.

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)

I think the NullPointException is came from here

fk=data.getLong("ab");

Do I need to add the parameter in MainActivity?

MainActivity.java

Some part of code snippet in 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();

                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");
            }

EDITED

 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");
        }
    }
}

WorkDetails

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

What you can just do is to place this data in your activity where fragment is placed. example is.

in your activity long ab = 12.4;

in your fragment long data = ((YourActivity)getActivity()).ab;

     "OR"

make ab like

static long ab = value; // your Details activity

in your details activity and get the value of this

with details activity name like

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

Answer 3

When you are instantiating your Claim Fragment , instantiate a bundle object and assign whatever data that you need to be passed in bundle and set it as argument to the fragment.

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

Then in your Claim fragment's onCreateView() you can access this bundle data as

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