無法從主要活動中的onActivityResult方法開始新活動

Question

我在調用照片庫意圖之後使用以下方法獲取圖像。我想通過傳遞該圖像的位圖並在第二個活動中顯示該圖像來開始另一個活動。但是，從照片庫中挑選照片後，什麼都不會發生。

protected void onActivityResult(int requestCode, int resultCode, Intent 
        data) { 
     final String path; 

     if (requestCode == GALLERY_REQUEST) { 
     if (resultCode == Activity.RESULT_OK) { 

     Uri imageFileUri = data.getData(); 

      if (imageFileUri != null) { 
       try { 
       path = getPath(imageFileUri); 
       BitmapFactory.Options load_option = new BitmapFactory.Options(); 
       load_option.inPurgeable = true; 
       load_option.inDensity = 0; 
       load_option.inTargetDensity = 0; 
       load_option.inDensity = 0; 
       load_option.inScaled = false; 
       bmp_main = BitmapFactory.decodeFile(path, load_option); 
       ByteArrayOutputStream stream = new ByteArrayOutputStream(); 
       bmp_main.compress(Bitmap.CompressFormat.PNG, 100, stream); 
       byte[] byteArray = stream.toByteArray(); 

       Intent intentPhoto = new Intent(MainActivity.this, SecondActivity.class); 
       intentPhoto.putExtra("image",byteArray); 
       startActivity(intentPhoto); 

        } catch (Exception e) { 

        e.printStackTrace(); 
        } 
       } 
      } 

      } 


     } 

有人可以告訴有什麼問題嗎？

注：1.I已經添加了活動清單

2.沒有對此

3.我已經做了調試logcat的錯誤或異常，它會高達startActivity行是否正確，但沒有什麼發生後

Answer 1

使用下面的代碼...

if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK 
      && null != data) { 
     Uri contentUri = data.getData(); 
     startActivity(new Intent(this, ViewGallery_Photo.class) 
       .setData(contentUri)); 
    } 

所以在onActivityResult有2個邏輯

1）如果要加載從畫廊圖像，然後它會帶你到其他活動

2）如果你是捕獲從相機圖像，然後它會帶你與其他活動不這是由庫調用相同的活動......

Answer 2

調用此出你的如果條件：

Intent intentPhoto = new Intent(MainActivity.this, SecondActivity.class); 
intentPhoto.putExtra("image",byteArray); 
startActivity(intentPhoto); 

試試這個：

  try { 
      Uri selectedImage = data.getData(); 
      String[] filePathColumn = { MediaStore.Images.Media.DATA }; 

      Cursor cursor = getContentResolver().query(selectedImage, 
        filePathColumn, null, null, null); 
      cursor.moveToFirst(); 

      int columnIndex = cursor.getColumnIndex(filePathColumn[0]); 
      String picturePath = cursor.getString(columnIndex); 
      cursor.close(); 

      String fullPath = Environment.getExternalStorageDirectory() 
        .getAbsolutePath(); 
      try { 

       File dir = new File(fullPath); 
       if (!dir.exists()) { 
        dir.mkdirs(); 
       } 
       OutputStream fOut = null; 
       File file = new File(fullPath, "userImage" + ".png"); 
       if (file.exists()) 
        file.delete(); 
       file.createNewFile(); 
       fOut = new FileOutputStream(file); 
       fOut.flush(); 
       fOut.close(); 
       Log.v("Image saved", "in" + file); 
      } catch (Exception e) { 
       Log.e("saveToExternalStorage()", e.getMessage()); 
      } 

      decodeFile(picturePath); 
      /* 
      * iv_display.setImageBitmap(mPhoto); Bitmap useThisBitmap = 
      * Bitmap.createScaledBitmap(mPhoto, mPhoto.getWidth(), 
      * mPhoto.getHeight(), true); 
      */ 

      ByteArrayOutputStream baos = new ByteArrayOutputStream(); 
      myBitmap.compress(Bitmap.CompressFormat.PNG, 100, baos); 
      bytepicture = baos.toByteArray(); 

      Intent newdata = new Intent(MainMenu.this, SecondActivity.class); 
      newdata.putExtra("picture", bytepicture); 
      startActivity(newdata); 
     } catch (Exception e) { 
      // TODO: handle exception 
      Log.v("TAG", "No Image Selected:"); 
     } 

對於解碼文件：

public void decodeFile(String filePath) { 

    // Decode image size 
    BitmapFactory.Options o = new BitmapFactory.Options(); 
    o.inJustDecodeBounds = true; 
    BitmapFactory.decodeFile(filePath, o); 

    // The new size we want to scale to 
    final int REQUIRED_SIZE = 1024; 

    // Find the correct scale value. It should be the power of 2. 
    int width_tmp = o.outWidth, height_tmp = o.outHeight; 
    int scale = 3; 
    while (true) { 
     if (width_tmp < REQUIRED_SIZE && height_tmp < REQUIRED_SIZE) 
      break; 
     width_tmp /= 2; 
     height_tmp /= 2; 
     scale *= 2; 
    } 

    // Decode with inSampleSize 
    BitmapFactory.Options o2 = new BitmapFactory.Options(); 
    o2.inSampleSize = scale; 
    mPhoto = BitmapFactory.decodeFile(filePath, o2); 
    myBitmap = ExifUtils.rotateBitmap(filePath, mPhoto); 

    // image.setImageBitmap(bitmap); 
}