Question

在API＆gt; = 23中，我们需要在运行时向用户请求权限。但由于某种原因，权限导致onResume被无限调用。是什么原因造成的？

  @Override
protected void onResume() {
    super.onResume();

     ActivityCompat.requestPermissions(MainActivity.this,
     new String[]{Manifest.permission.ANYPERMISSION},1);       

}

 @Override
public void onRequestPermissionsResult(int requestCode,
         String permissions[], int[] grantResults) {
     }

Answer 1

当您显示权限问题对话框时，Acitvity将转到onPause，当对话框隐藏时，它会转到onResume。你必须改变请求许可的地方。

Answer 2

用于完成先前响应的权限的一小段代码：）

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    if (Build.VERSION.SDK_INT >= 23)
        ensurePermissions(
                Manifest.permission.GET_ACCOUNTS,
                Manifest.permission.WRITE_EXTERNAL_STORAGE
        );
}

和

@TargetApi(23)
private void ensurePermissions(String... permissions) {
    boolean request = false;
    for (String permission : permissions)
        if (checkSelfPermission(permission) != PackageManager.PERMISSION_GRANTED) {
            request = true;
            break;
        }

    if (request) {
        requestPermissions(permissions, REQUEST_CODE_PERMISSION);
    }
}

Answer 3

首先，您的应用需要在询问运行时权限之前检查您是否已被授予特定权限。

 if (ContextCompat.checkSelfPermission(this.getApplicationContext(),
            android.Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
    } else {
        ActivityCompat.requestPermissions(this, new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION}, REQUEST_CODE);
    }

权限请求在OnResume中导致无限循环

3 个答案: