多個ImageButton上的Android預覽圖片

Question

我正嘗試創建一個具有兩個ImageButtons的活動的應用程序。點擊每個按鈕時，相機將打開並拍攝照片。一旦圖片被保存，它就會在圖片按鈕中顯示爲預覽圖。我可以爲其中的一個做，但當點擊第二個時，它會覆蓋第一個圖像。

有沒有辦法將單擊的元素傳遞給onActivityResult方法以設置哪個ImageButton應該包含圖片？

的代碼如下：

// Activity request codes 
private static final int CAMERA_CAPTURE_IMAGE_REQUEST_CODE = 100; 
private static final int CAMERA_CAPTURE_VIDEO_REQUEST_CODE = 200; 
public static final int MEDIA_TYPE_IMAGE = 1; 
public static final int MEDIA_TYPE_VIDEO = 2; 

// directory name to store captured images and videos 
private static final String IMAGE_DIRECTORY_NAME = "Hello Camera"; 

private Uri fileUri; // file url to store image/video 

private ImageButton imageButton; 
private ImageButton imageButton2; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.ask_activity_layout); 

    imageButton =(ImageButton) findViewById(R.id.imageButton); 
    imageButton2 =(ImageButton) findViewById(R.id.imageButton2); 


    // Checking camera availability 
    if (!isDeviceSupportCamera()) { 
     Toast.makeText(getApplicationContext(), 
       "Sorry! Your device doesn't support camera", 
       Toast.LENGTH_LONG).show(); 
     // will close the app if the device does't have camera 
     finish(); 
    } 
} 

啓動捕獲圖像的方法：

public void captureImage(View view) { 
    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 

    fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE); 

    intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); 

    // start the image capture Intent 

    startActivityForResult(intent, CAMERA_CAPTURE_IMAGE_REQUEST_CODE); 
} 

的onActivityResult方法：

@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
    // if the result is capturing Image 
    if (requestCode == CAMERA_CAPTURE_IMAGE_REQUEST_CODE) { 
     if (resultCode == RESULT_OK) { 
      // successfully captured the image 
      // display it in image view 
      // data.getComponent(); 
      previewCapturedImage(null); 
     } else if (resultCode == RESULT_CANCELED) { 
      // user cancelled Image capture 
      Toast.makeText(getApplicationContext(), 
        "User cancelled image capture", Toast.LENGTH_SHORT) 
        .show(); 
     } else { 
      // failed to capture image 
      Toast.makeText(getApplicationContext(), 
        "Sorry! Failed to capture image", Toast.LENGTH_SHORT) 
        .show(); 
     } 
    } else if (requestCode == CAMERA_CAPTURE_VIDEO_REQUEST_CODE) { 
     if (resultCode == RESULT_OK) { 
      // video successfully recorded 
      // preview the recorded video 
      previewCapturedImage(null); 
     } else if (resultCode == RESULT_CANCELED) { 
      // user cancelled recording 
      Toast.makeText(getApplicationContext(), 
        "User cancelled video recording", Toast.LENGTH_SHORT) 
        .show(); 
     } else { 
      // failed to record video 
      Toast.makeText(getApplicationContext(), 
        "Sorry! Failed to record video", Toast.LENGTH_SHORT) 
        .show(); 
     } 
    } 
} 

最後previewCapturedImage方法：

private void previewCapturedImage(View view) { 
    try { 
     // hide video preview 
     //videoPreview.setVisibility(View.GONE); 

     imageButton.setVisibility(View.VISIBLE); 

     // bimatp factory 
     BitmapFactory.Options options = new BitmapFactory.Options(); 

     // downsizing image as it throws OutOfMemory Exception for larger 
     // images 
     options.inSampleSize = 8; 

     final Bitmap bitmap = BitmapFactory.decodeFile(fileUri.getPath(), 
       options); 

     **imageButton.setImageBitmap(bitmap);** 
    } catch (NullPointerException e) { 
     e.printStackTrace(); 
    } 
} 

我想從onActivityResult點擊的實際ImageButton傳遞到previewCaptureImage方法來動態設置ImageButton或ImageButton2中的圖像。

任何與此有關的幫助將不勝感激。

感謝

勒布

PS：這裏發佈的代碼是取自下面的例子：http://www.androidhive.info/2013/09/android-working-with-camera-api/

Answer 1

是。這就是startActivityForResult函數的requestCode參數的目的。您將不得不爲每個將「接收」圖像的按鈕設置不同的代碼。

喜歡的東西：

private static final int CAMERA_CAPTURE_IMAGE_REQUEST_CODE = 100; 
private static final int CAMERA_CAPTURE_IMAGE_REQUEST_CODE_SECONDARY = 101; 
private static final int CAMERA_CAPTURE_VIDEO_REQUEST_CODE = 200; 

並基於requestCode選擇將被分配捕獲的位圖的ImageView。