android - AlertDialog 未被解除

Question

我有以下代码来显示一个警报对话框以打开 Locations Service Settings ：

alert = new AlertDialog.Builder(context).create();
alert.setTitle("Unable to Retrieve Current Location");
alert.setMessage(" Enable Location Service ?");
alert.setButton(DialogInterface.BUTTON_POSITIVE,"Open Settings", new DialogInterface.OnClickListener() {

    @Override
    public void onClick(DialogInterface dialog, int which) {
        alert.dismiss();
        Intent intent = new Intent(android.provider.Settings.ACTION_SECURITY_SETTINGS);
        context.startActivity(intent);

    }
});
alert.setCancelable(false);
alert.show();

设置正常打开，但是当我按回时，上一个对话框不会被关闭。从设置返回时如何关闭对话框。

Answer 1

代替alert.dismiss();

点击事件

尝试finish();//这将完成您的活动

Answer 2

使用dialog.dismiss();代替alert.dismiss();

Answer 3

尝试这个：

AlertDialog.Builder alert = new AlertDialog.Builder (context);
alert.setTitle ("Unable to Retrieve Current Location");
alert.setMessage (" Enable Location Service ?");
alert.setButton (DialogInterface.BUTTON_POSITIVE, "Open Settings", 
                 new DialogInterface.OnClickListener() {

  @Override
  public void onClick(DialogInterface dialog, int which) {
    Intent intent = new Intent(android.provider.Settings.ACTION_SECURITY_SETTINGS);
    context.startActivity (intent);
  });

// Create and show the dialog.
alert.create();
alert.show();

主要区别是将create推迟到添加组件之后，调用show，而不是调用dismiss。