我叫汤姆,我正在尝试从外部存储打开文件。由于某种原因,它根本没有征求许可?!?!我将感谢您的任何答复!汤姆这是我的代码:
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && checkSelfPermission(Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED){
Toast.makeText(MainActivity.this,"should snd request ",Toast.LENGTH_SHORT).show();
requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, PERMISSION_REQUET_CODE);
}
public void OnRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResult){
if(requestCode == PERMISSION_REQUET_CODE){
if(grantResult[0] == PackageManager.PERMISSION_GRANTED){
Toast.makeText(MainActivity.this,"permission granted!",Toast.LENGTH_SHORT).show();
}
else{
Toast.makeText(MainActivity.this,"*** permission not granted! ***",Toast.LENGTH_LONG).show();
finish();
}
}
}
确保您还向Manifest
文件添加了权限
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.appname">
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
...
</manifest>