設置一個按鈕以充當后退按鈕

Question

我想設置一個簡單的Alert View的OK按鈕來充當后退按鈕。 我應該使用什么方法？

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

您必須調用finish方法才能破壞活動。

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

為此，在您的活動和點擊按鈕時調用此按鈕。

@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();