Android 相机意图在 Android 11 后没有响应

Android Camera intent not responding in Android 11

我正在使用 Camera Intent。 Android 10 之前一切正常,但在 Android 11 我得到结果代码 0.

  1. 清单许可

    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    
  2. 创建文件的 Intent 函数:

     private void openCameraApp()
     {
         Intent picIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE).
                 addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
         try {
    
             String file_path = Environment.getExternalStorageDirectory().toString() +
                     "/" + mContext.getResources().getString(R.string.app_name);
    
             File dir = new File(file_path);
             if (!dir.exists())
                 dir.mkdirs();
    
             imagePath = new File(dir, mContext.getResources().getString(R.string.app_name) + System.currentTimeMillis() + ".png");
    
             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
                 picIntent.putExtra(MediaStore.EXTRA_OUTPUT, FileProvider.getUriForFile(mContext, BuildConfig.APPLICATION_ID, imagePath));
                 setUri(FileProvider.getUriForFile(mContext, BuildConfig.APPLICATION_ID, imagePath));
             } else {
                 picIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(imagePath));
                 setUri(Uri.fromFile(imagePath));
             }
    
             ((Activity) mContext).startActivityForResult(picIntent, CAMERA_REQUEST);
    
         } catch (Exception e) {
             logger.e(e);
         }
     }
    

我在清单文件的应用程序标签中添加了 android:requestLegacyExternalStorage="true"

参见。可能是AndroidManifest有问题。

<queries>
    <intent>
        <action android:name="android.media.action.IMAGE_CAPTURE" />
    </intent>
</queries>

或参见Cannot take a photo programmatically on Android 11 - intent returns canceled status

删除这个.putExtra(MediaStore.EXTRA_OUTPUT

activity.java中的结果代码表示相机activity已被取消:

/** Standard activity result: operation canceled. */
public static final int RESULT_CANCELED    = 0;
/** Standard activity result: operation succeeded. */
public static final int RESULT_OK           = -1;
/** Start of user-defined activity results. */
public static final int RESULT_FIRST_USER   = 1;

尝试为 IMAGE_CAPTURE 启动 activity: startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE)