从Android中的意图选择器中选择选项（相机或图库）后请求权限

Question

我创建了一个包含图库，照片和相机应用程序的意向选择器。现在对于在Android 6.0或更高版本上运行的设备，我希望在从选择器中选择应用后询问运行时权限，就像用户选择图库选项一样，我只会询问存储权限，如果用户选择相机选项，我会询问相机和存储如果之前没有给出这两个权限。

有人可以帮我这么做吗？

这里是我的代码使用此代码当过

public void openImageIntent() { 
    File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES); 
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date()); 
    String fname = "ABCD_" + timeStamp; 
    final File sdImageMainDirectory = new File(storageDir, fname); 
    fileUri = Uri.fromFile(sdImageMainDirectory); 

    // Camera. 
    final List<Intent> cameraIntents = new ArrayList<Intent>(); 
    final Intent captureIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
    final PackageManager packageManager = getPackageManager(); 
    final List<ResolveInfo> listCam = packageManager.queryIntentActivities(captureIntent, 0); 
    for (ResolveInfo res : listCam) { 
     final String packageName = res.activityInfo.packageName; 
     final Intent intent = new Intent(captureIntent); 
     intent.setComponent(new ComponentName(res.activityInfo.packageName, res.activityInfo.name)); 
     intent.setPackage(packageName); 
     intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); 
     cameraIntents.add(intent); 
    } 

    //Gallery. 
    Intent galleryIntent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); 

    //Create the Chooser 
    final Intent chooserIntent = Intent.createChooser(galleryIntent, "Select Source"); 

    chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, cameraIntents.toArray(new Parcelable[cameraIntents.size()])); 


    startActivityForResult(chooserIntent, 65530); 
} 

Answer 1

感谢大家的支持。

我自己解决了。

我追加下面的代码在上述方法中

Intent receiver = new Intent(MainActivity.this, IntentOptionReceiver.class); 
     PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, receiver, PendingIntent.FLAG_UPDATE_CURRENT); 
     //Create the Chooser 
     final Intent chooserIntent; 
     if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP_MR1) { 
      chooserIntent = Intent.createChooser(galleryIntent, "Select Source", pendingIntent.getIntentSender()); 
     } else { 
      chooserIntent = Intent.createChooser(galleryIntent, "Select Source"); 
     } 

这里是我的广播接收器（IntentOptionReceiver），通知其意图选择期权选择

public class IntentOptionReceiver extends BroadcastReceiver { 
    @Override 
    public void onReceive(Context context, Intent intent) { 
     for (String key : intent.getExtras().keySet()) { 
      Log.e("intentOptionReceiver", "Intent option clicked info" + intent.getExtras().get(key)); 
     } 
    } 
} 

不要忘了进入里面体现你的广播接收器。

Answer 2

检查权限。

什么权限需要放入数组中。

if ((ContextCompat.checkSelfPermission(LoginActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED)) { 
      requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.CAMERA}, 
        MY_PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE); 

    } 

添加这种方法也

@Override 
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { 
     switch (requestCode) { 
      case PERMISSIONS_CODE: 
       if (grantResults.length <= 0 || grantResults[0] != PackageManager.PERMISSION_GRANTED) { 
        Toast.makeText(this, "Permission denied", Toast.LENGTH_SHORT).show(); 
       } 
       break; 
      default: 
       super.onRequestPermissionsResult(requestCode, permissions, grantResults); 
       break; 
     } 
    } 

Answer 3

如果应用程序具有读取外部存储许可

private boolean hasReadExternalStoragePermission() { 
      if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { 
       int permissionCheck = checkSelfPermission(getActivity(), 
         Manifest.permission.READ_EXTERNAL_STORAGE); 
       if (permissionCheck != PackageManager.PERMISSION_GRANTED) { 
        requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, REQUEST_READ_EXTERNAL_STORAGE); 
        return false; 
       } 
       return true; 
      } 
      return true; 
     } 

裹需要许可与操作此方法返回true hasReadExternalStoragePermission方法。

public void openGallery() { 

     if (hasReadExternalStoragePermission()) { 
      Intent galleryIntent = new Intent(Intent.ACTION_PICK, 
        android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); 
      startActivityForResult(galleryIntent, REQUEST_IMAGE_FROM_GALLERY); 
     } 
    } 

请扩展更多的你自己，用Manifest.permission_group代替Manifest.permission，在地方，你需要一次申请多个权限。

https://developer.android.com/training/permissions/requesting.html