Android shouldShowRequestPermissionRationale有错误吗？

我认为应该有一个Bug应该ShowRequestPermissionRationale

代码是…

@Override
protected void onResume() {
    super.onResume();
    if(ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_DENIED &&
            ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_DENIED) {
        if(ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.ACCESS_COARSE_LOCATION) ||
                ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.ACCESS_FINE_LOCATION)) {
            new AlertDialog.Builder(this)....show();
    } else {
        // do something...
}

首先安装了该应用,我们不允许此权限.因此,在调用onResume时,将出现AlertDialog.但是没有出现…

如果我们进入应用程序的设置,并允许权限.因此,我们播放应用程序代码(//做一些事情).同样,我们进入应用程序的设置,拒绝权限.然后,我们重新启动应用程序,出现AlertDialog.

为什么应用程序会这样运行？

解决方法:

来自开发人员文档：

shouldShowRequestPermissionRationale()

This method returns true if the app has requested this permission previously and the user denied the request.

Note: If the user turned down the permission request in the past and chose the Don’t ask again option in the permission request system dialog, this method returns false.

问题是您在使用前尚未请求许可

 ActivityCompat.requestPermissions();

因此,它不显示对话框.

当您从“设置”中手动授予许可或拒绝许可时,它假定您拒绝了许可,这就是为什么它显示“警报”对话框的原因.

标签：android-permissions,android
来源： https://codeday.me/bug/20191026/1938141.html