android - fragment 选项卡 viewpager 问题

Question

我有一个带有 View 寻呼机和三个标签的 fragment "FragmentOne""FragmentTwo"等

在每个 fragment (页面)中，我想设置来自图库或相机的图像。但是当我在 FragmentOne 选项卡中设置图像(位图)时，位图也显示在其他 fragment 中。但我希望独特的选定图像应显示在相应 fragment 的 Imageview 中。

我的 ViewPager 类看起来像。

public class MainFragment extends Fragment {
private ViewPager mViewPager;
private SlidingTabLayout mSlidingTabLayout;

// Tabs titles
private String[] tabsTitles = {"One", "Two", "Three"};




@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    View rootView = inflater.inflate(R.layout.new_proj_frag_layout, container, false);
    // ViewPager
    mViewPager = (ViewPager) rootView.findViewById(R.id.viewpager);
    mViewPager.setOffscreenPageLimit(3);
    mViewPager.setAdapter(new ViewPagerAdapter(getChildFragmentManager(), tabsTitles));

    // Sliding tab layout
    mSlidingTabLayout = (SlidingTabLayout) rootView.findViewById(R.id.sliding_tabs);
    mSlidingTabLayout.setViewPager(mViewPager);
    return rootView;
}

FragmentOne

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.white_fragment_layout, container, false);        
    image_one_btn = (ImageView) rootView.findViewById(R.id.image_one_click);       
    image_one_btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            selectImage();
        }
    });

    return rootView;
}

private void selectImage() {
    Intent i = new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
    getParentFragment().startActivityForResult(i, 1);
}

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (data != null) {
        Uri selectedImage = data.getData();
        String[] filePathColumn = { MediaStore.Images.Media.DATA };
        Cursor cursor = getActivity().getContentResolver().query(selectedImage,filePathColumn, null, null, null);

        cursor.moveToFirst();
        int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
        String picturePath = cursor.getString(columnIndex);
        Log.i("ImagePath:","===="+picturePath);

        image_one_btn.setImageBitmap(BitmapFactory.decodeFile(picturePath));

        cursor.close();
    } else {
        Toast.makeText(getActivity(), "Try Again!!", Toast.LENGTH_SHORT).show();
    }
}

ViewPagerAdapter

public class ViewPagerAdapter extends FragmentPagerAdapter {

private String[] tabsTitles;

public ViewPagerAdapter(FragmentManager fm, String[] tabsTitles) {
    super(fm);
    this.tabsTitles = tabsTitles;
}

@Override
public CharSequence getPageTitle(int position) {
    return tabsTitles[position];
}

@Override
public Fragment getItem(int index) {
    switch(index) {
    case 0:
        return new ImageOneFragment();
    case 1:
        return new ImageTwoFragment();
    case 2:
        return new ImageThreeFragment();

    }

    return null;
}

@Override
public int getCount() {
    return tabsTitles.length;
}

Answer 1

这是可以帮助任何面临相同问题的人的解决方案。

MainFragment add the following code

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    List<Fragment> fragments = getChildFragmentManager().getFragments();
    if (fragments != null) {
        for (Fragment fragment : fragments) {
            fragment.onActivityResult(requestCode, resultCode, data);


            Log.i("in activity result","");
        }
    }
}

并在 ImageOneFragment 的 onActivityResult 方法中检查 requestCode

if (requestCode == 1){

//将图片设置为imageview