痞客興的部落格

package com.example.charleslin.keybackalarm;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.KeyEvent;

public class MainActivity extends AppCompatActivity {

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

    @Override
public boolean onKeyDown(int keyCode, KeyEvent event)
    {
        if (keyCode == KeyEvent.KEYCODE_BACK )
        {
            AlertDialog isExit = new AlertDialog.Builder(this).create();
            isExit.setTitle("退出確認");
            isExit.setMessage("確定要退出嗎");
            isExit.setButton("確定", quitlistener);
            isExit.setButton2("取消", quitlistener);
            isExit.show();

        }

        return false;

    }
    
    DialogInterface.OnClickListener quitlistener = new DialogInterface.OnClickListener()
    {
        public void onClick(DialogInterface dialog, int which)
        {
            switch (which)
            {
                case AlertDialog.BUTTON_POSITIVE:
                    finish();
                    break;
                case AlertDialog.BUTTON_NEGATIVE:
                    break;
                default:
                    break;
            }
        }
    };
}