错误：（61,36）错误：找不到符号变量READ_EXTERNAL_STORAGE

Question

错误：（61,36）错误：找不到符号变量READ_EXTERNAL_STORAGE。

private void getPDF() {
    //for greater than lolipop versions we need the permissions asked on runtime
    //so if the permission is not available user will go to the screen to allow storage permission
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && ContextCompat.checkSelfPermission(this,
            Manifest.permission.READ_EXTERNAL_STORAGE)
            != PackageManager.PERMISSION_GRANTED) {
        Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS,
                Uri.parse("package:" + getPackageName()));
        startActivity(intent);
        return;
    }

Answer 1

我认为你做错了导入。 试试namespace App\Http\Controllers\admin; use Illuminate\Http\Request; use App\Http\Controllers\Controller; class PostsController extends Controller { /** * Display a listing of the resource. * * @return \Illuminate\Http\Response */ public function index() { echo "call to index"; } ........ other functions }

复制并通过以下代码：

android.Manifest.permission.READ_EXTERNAL_STORAGE