设置一个按钮作为后退按钮

Question

我想设置一个简单的警报视图的确定按钮来充当后退按钮的作用。我应该使用什么方法？

AlertDialog.Builder alt_bld = new AlertDialog.Builder(this.getContext());
                AlertDialog alert = alt_bld.create();
                alert.setTitle("Your score is: " + score);
                alert.setButton("OK", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) { 
  //here would be the "back button's method"
}});
                alert.show();   

Answer 1

只需添加：

NameOfYourContainingClass.this.onBackPressed();

Answer 2

您必须调用 finish 方法才能销毁活动。

AlertDialog.Builder alt_bld = new AlertDialog.Builder(this.getContext());
                AlertDialog alert = alt_bld.create();
                alert.setTitle("Your score is: " + score);
                alert.setButton("OK", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) { 

                   // Enter you activity Name add call finish.

                   MyAcitivity.this.finish(); // Or MyAcitivity.this.onBackPressed()

}});
alert.show();   

Answer 3

为此，您的活动和活动中仅此而已单击按钮时调用。

@Override
public void onBackPressed() 
{ 
     super.onBackPressed();
};



    AlertDialog.Builder alt_bld = new AlertDialog.Builder(this.getContext());
                AlertDialog alert = alt_bld.create();
                alert.setTitle("Your score is: " + score);
                alert.setButton("OK", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) { 
               onBackPressed();
}});
                alert.show();