从Viewpager分享图片

Question

我想从ViewPager共享当前项目，但无法获取当前图像并共享它。

分享按钮只在促销页面的操作栏上，它将共享ViewPager中的当前项目。

这是我的适配器：

class CustomPagerAdapter extends PagerAdapter { 
int[] mResources = { 
     R.drawable.abc1, 
     R.drawable.abc2 
}; 
Context mContext; 
LayoutInflater mLayoutInflater; 

public CustomPagerAdapter(Context context) { 
    mContext = context; 
    mLayoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
} 

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

@Override 
public boolean isViewFromObject(View view, Object object) { 
    return view == ((LinearLayout) object); 
} 

@Override 
public Object instantiateItem(ViewGroup container, int position) { 
    View itemView = mLayoutInflater.inflate(R.layout.slidingimages_layout, container, false); 

    ImageView imageView = (ImageView) itemView.findViewById(R.id.imageView); 
    imageView.setImageResource(mResources[position]); 

    container.addView(itemView); 
    return itemView; 
} 

@Override 
public void destroyItem(ViewGroup container, int position, Object object) { 
    container.removeView((LinearLayout) object); 
} 
} 

这是我的片段Java代码：

public class PromotionFragment extends Fragment { 
Menu menu; 
private PopupWindow Pro_popup; 

public PromotionFragment() { 
    // Required empty public constructor 
} 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setHasOptionsMenu(true); 
} 
public void onCreateOptionsMenu(Menu menu,MenuInflater inflater) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    inflater.inflate(R.menu.toolbar_menu, menu);//Menu Resource, Menu 
    super.onCreateOptionsMenu(menu,inflater); 
} 
@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 
    // Inflate the layout for this fragment 

    View view = inflater.inflate(R.layout.fragment_promotion, container, false); 
    CustomPagerAdapter adapter = new CustomPagerAdapter(getActivity()); 

    ViewPager viewpager = (ViewPager) view.findViewById(R.id.pager); 
    viewpager.setAdapter(adapter); 

    LinePageIndicator titleIndicator = (LinePageIndicator)view.findViewById(R.id.indicator); 
    titleIndicator.setViewPager(viewpager); 


    return view; 
} 
@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    Display display = getActivity().getWindowManager().getDefaultDisplay(); 
    Point size = new Point(); 
    display.getSize(size); 
    final int width = size.x; 
    final int height = size.y; 
    RelativeLayout pro_popup = (RelativeLayout) getActivity().findViewById(R.id.pro_popup); 
    LayoutInflater inflater = (LayoutInflater) getActivity().getSystemService(LAYOUT_INFLATER_SERVICE); 
    View pro_popupview = inflater.inflate(R.layout.promotion_popup, null); 
    TextView qr_title = (TextView) pro_popupview.findViewById(R.id.qr_title); 
    TextView qr_con = (TextView) pro_popupview.findViewById(R.id.qr_con); 
    RelativeLayout popupbg2 = (RelativeLayout) pro_popupview.findViewById(R.id.prepopup); 
    Bitmap myBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.qr_code); 
    Button scan_btn = (Button) pro_popupview.findViewById(R.id.scan_btn); 
    scan_btn.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
     } 
    }); 
    Button dismiss = (Button) pro_popupview.findViewById(R.id.propop_dismiss); 
    dismiss.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View v) { 
      Pro_popup.dismiss(); 
     } 

    }); 
    switch (item.getItemId()) { 
     case R.id.qr_scan: 
      qr_title.setText(R.string.propop_title); 
      qr_con.setText(R.string.propop_con); 
      Pro_popup = new PopupWindow(pro_popupview); 
      Pro_popup.setWidth(width - 80); 
      Pro_popup.setHeight(height - 400); 
      Pro_popup.setOutsideTouchable(true); 
      Pro_popup.setFocusable(true); 
      Pro_popup.showAtLocation(pro_popup, Gravity.CENTER, 0, -60); 

      return true; 
     case R.id.toolbarshare: 
      final Intent shareIntent = new Intent(Intent.ACTION_SEND); 
      shareIntent.setType("image/jpg"); 
      startActivity(Intent.createChooser(shareIntent, "Share image using")); 
      CustomPagerAdapter adapter = new CustomPagerAdapter(getActivity()); 
      ViewPager viewpager = (ViewPager)getActivity().findViewById(R.id.pager); 
      viewpager.setAdapter(adapter); 
      int position = viewpager.getCurrentItem(); 
      if(position == 0) 
      { 
       final File photoFile = new File(getActivity().getFilesDir(), "abc1.png"); 
       shareIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(photoFile)); 
      } 
      else 
      { 
       final File photoFile = new File(getActivity().getFilesDir(), "abc1.png"); 
       shareIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(photoFile)); 
      } 
      return true; 
    } 

    return false; 
} 

Answer 1

当用户点击分享按钮

CustomPagerAdapter adapter = new CustomPagerAdapter(getActivity()); 
ViewPager viewpager = (ViewPager)getActivity().findViewById(R.id.pager); 
viewpager.setAdapter(adapter); 

要设置在viewpager适配器删除此代码。

你只需要当用户点击分享按钮

viewpager.getCurrentItem(); 

确保全局定义viewpager变量，这样就可以在任何地方片段访问它得到的ViewPager位置。

一件事

startActivity(Intent.createChooser(shareIntent, "Share image using")); 

它应该是在你的病情return语句之前结束。