設置一個按鈕作爲後退按鈕

Question

我想設置一個簡單的Alert View的OK按鈕來充當後退按鈕。我應該使用什麼方法？

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

您必須調用完成方法才能銷燬活動。

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 2

只需添加：

NameOfYourContainingClass.this.onBackPressed(); 

Answer 3

對於眼前這個在您的活動&呼叫按鈕被點擊時。

@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();