Question

我想在用户来自设置应用时关闭对话框。

这是我的onCreate功能

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        checkLocationService(); 

}

此功能用户检查位置服务是打开还是关闭。

private void checkLocationService(){
        LocationManager lm = (LocationManager)getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
        try {
            gps_enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
        } catch(Exception ex) {
            Log.e(TAG,ex.toString());
        }

        if(!gps_enabled){
            showSettingsAlert();
        }

    }

此功能用于显示警告对话框。

private void showSettingsAlert() {
        AlertDialog.Builder alertDialog = new AlertDialog.Builder(LoginActivity.this);

        // Setting Dialog Title
        alertDialog.setTitle("GPS is settings");

        // Setting Dialog Message
        alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");

        // On pressing the Settings button.
        alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
                Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                startActivityForResult(intent,SETTING_INTENT_REQUEST);

            }
        });

        // On pressing the cancel button
        alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
                dialog.cancel();
            }
        });

        // Showing Alert Message
        alertDialog.show();
    }

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(requestCode==SETTING_INTENT_REQUEST){
            setAlarm();
        }
    }

Answer 1

AlertDialog.Builder实例没有dismiss（）方法。因此，而不是AlertDialog.Builder使用AlertDialog实例，如下所示：

AlertDialog alertDialog = new AlertDialog.Builder(this).create();

然后你可以使用alertDialog.dismiss();

来应用解雇功能

Answer 2

据我了解你。您想在回调中取消警报：

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(requestCode==SETTING_INTENT_REQUEST){
if (alert != null && alert.isShowing()) {
alert.dismiss();
}
            setAlarm();
        }
    }

当然，使用它：

     AlertDialog alert ;
    private void showSettingsAlert() {
            alertDialog = new AlertDialog.Builder(LoginActivity.this);
/// setup your builder here

///....
AlertDialog alert =  alertDialog.create();

在android中我想在用户来自设置应用程序时关闭对话框

2 个答案: