READ_EXTERNAL_STORAGE权限一直被拒绝

Question

我正在尝试在Android 6.0上请求运行时权限。以下是我的代码：

private void enablePermission() {
    String[] PERMISSIONS = { Manifest.permission.READ_EXTERNAL_STORAGE};

    if (!hasPermissions(this, PERMISSIONS)) {
        ActivityCompat.requestPermissions(this, PERMISSIONS,
                PERMISSION_ALL);
    }
}


public static boolean hasPermissions(Context context, String... permissions) {

    for (String permission : permissions) {
        if (ContextCompat.checkSelfPermission(context, permission) !=
                PackageManager.PERMISSION_GRANTED) {
            return false;
        }
    }

    return true;
}


@Override
public void onRequestPermissionsResult(int requestCode, String[]
        permissions, int[] grantResults) {
    switch (requestCode) {
        case PERMISSION_ALL:
            if (grantResults.length > 0 && grantResults[0] ==
                    PackageManager.PERMISSION_GRANTED) {
                Log.d("Permission", "Granted");
            } else {
                Log.d("Permission", "Denied");
            }
    }
}

在onRequestPermissionsResult中，我总是收到“权限被拒绝”的提示。我尝试了使用ACCESS_FINE_LOCATION的代码并成功了。

- Abbes Yassine

Answer 1

尝试在权限中添加Android包。类似这样（这是用于写外部存储的）:

public  boolean isStoragePermissionGranted() {
    if (Build.VERSION.SDK_INT >= 23) {
        if (checkSelfPermission(android.Manifest.permission. READ_EXTERNAL_STORAGE)
                == PackageManager.PERMISSION_GRANTED) {
            Log.v(TAG,"Permission is granted");
            return true;
        } else {

            Log.v(TAG,"Permission is revoked");
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission. READ_EXTERNAL_STORAGE}, 1);
            return false;
        }
    }
    else { //permission is automatically granted on sdk<23 upon installation
        Log.v(TAG,"Permission is granted");
        return true;
    }


}

回调函数：

 @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if(grantResults[0]== PackageManager.PERMISSION_GRANTED){
            Log.v(TAG,"Permission: "+permissions[0]+ "was "+grantResults[0]);
            //resume tasks needing this permission
        }
    }

您可以参考这个SO答案了解更多信息。

- MetaSnarf

Answer 2

我通过在Genymotion中重新启动虚拟设备解决了我的问题。

- Abbes Yassine