如何在图库视图中从选定图像获取图像数据？

我有以下代码，列出了手机画廊中的所有jpeg。它工作正常，但是当我选择一张图片时，我想用选定的图像数据激发图像处理活动的意图。有任何想法吗？如何在图库视图中从选定图像获取图像数据？

预先感谢马特

Button useGallery = (Button)findViewById(R.id.loadfromgallery); 
     useGallery.setOnClickListener(new OnClickListener() { 

      @Override 
      public void onClick(View arg0) { 

       Intent photoPickerIntent = new Intent(Intent.ACTION_PICK); 
       photoPickerIntent.setType("image/*"); 
       startActivityForResult(photoPickerIntent, SELECT_PHOTO); 
      }}) ; 



    } 


    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) { 
     super.onActivityResult(requestCode, resultCode, imageReturnedIntent); 

     switch(requestCode) { 
     case SELECT_PHOTO: 
      if(resultCode == RESULT_OK){ 
       Uri selectedImage = imageReturnedIntent.getData(); 
       InputStream imageStream = null; 
       try { 
        imageStream = getContentResolver().openInputStream(selectedImage); 
       } catch (FileNotFoundException e) { 
        // TODO Auto-generated catch block 
        e.printStackTrace(); 
       } 
       Bitmap yourSelectedImage = BitmapFactory.decodeStream(imageStream); 


       if(yourSelectedImage != null){ 
       Log.e(TAG,"pic ok"); 
       }else{ 
        Log.e(TAG,"pic not ok"); 
       } 
      } 
     } 
    }

来源

2011-10-25 turtleboy

您处理这种情况的方式取决于您传递数据的应用程序。如果应用程序需要位图的URI，则必须将其作为附加内容传递给您的意图。否则，你可以传递一个位图（搜索如何做），但是，我不会建议你这样做，因为你发送的数据很多。 – dymmeh

我做了这样的:)

protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) { 
      super.onActivityResult(requestCode, resultCode, imageReturnedIntent); 

      switch(requestCode) { 
      case SELECT_PHOTO: 
       if(resultCode == RESULT_OK){ 
        Uri selectedImage = imageReturnedIntent.getData(); 
        InputStream imageStream = null; 
        try { 
         imageStream = getContentResolver().openInputStream(selectedImage); 
        } catch (FileNotFoundException e) { 
         // TODO Auto-generated catch block 
         e.printStackTrace(); 
        } 
        Bitmap yourSelectedImage = BitmapFactory.decodeStream(imageStream); 
        Intent intent = new Intent(mContext, DisplayUndistortedBitmapFromGalleryActivity.class); 
        intent.setData(selectedImage); 
        startActivity(intent); 

        if(yourSelectedImage != null){ 
        Log.e(TAG,"pic ok"); 
        }else{ 
         Log.e(TAG,"pic not ok"); 
        } 
       } 
      }

。

public class DisplayUndistortedBitmapFromGalleryActivity extends Activity { 

    private static final String TAG = "*********DUBFGActivity"; 
    private Context mContext = this; 
    Uri uri; 
    private Bitmap mbitmap = null; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

     requestWindowFeature(Window.FEATURE_NO_TITLE); 
     getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
       WindowManager.LayoutParams.FLAG_FULLSCREEN); 


     uri = getIntent().getData(); 
     if(uri != null){ 
      Log.e(TAG, "uri ok"); 
     }else { 
      Log.e(TAG, "uri not ok"); 
     } 


     try { 
       mbitmap = Media.getBitmap(getContentResolver(), uri); 
      //setMbitmap(bitmap); 
     } catch (FileNotFoundException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 

     if(mbitmap == null){ 
      Log.e(TAG,"mbitmap is null"); 
     }else{ 
      Log.e(TAG,"mbitmap is not null"); 
     }

来源

2011-11-02 19:50:27 turtleboy

如何在图库视图中从选定图像获取图像数据？

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