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MyActivityTest_ChenJinTao.zip(免费下载)[0 次下载]package com.example.myactivitytest; |
import java.util.ArrayList; |
import java.util.Timer; |
import java.util.TimerTask; |
import android.app.Activity; |
import android.os.Bundle; |
import android.view.KeyEvent; |
import android.widget.Toast; |
public class BaseActivity extends Activity { |
Timer timer; |
boolean bFlag = false;// bFlag = false 没有按下back 键 |
|
static ArrayList<BaseActivity> mActivities = new ArrayList<BaseActivity>(); |
public BaseActivity() { |
} |
@Override |
protected void onCreate(Bundle savedInstanceState) { |
super.onCreate(savedInstanceState); |
timer = new Timer(); |
mActivities.add(this); |
|
} |
@Override |
public boolean onKeyDown(int keyCode, KeyEvent event) { |
if (keyCode == KeyEvent.KEYCODE_BACK) { |
if (bFlag == true) { // 第二按下back键 |
for (int i = 0; i < mActivities.size(); i++) { |
BaseActivity baseActivity = mActivities.get(i); |
baseActivity.finish(); |
} |
mActivities.clear(); |
return true; |
} |
bFlag = true; // bFlag = false 没有按下back 键 |
timer.schedule(new TimerTask() { |
@Override |
public void run() { |
bFlag = false; |
} |
}, 2000); |
Toast.makeText(BaseActivity.this, "再按下一次Back键退出应用程序", |
Toast.LENGTH_LONG).show(); |
return true; |
} |
return super.onKeyDown(keyCode, event); |
} |
MyActivityTest_ChenJinTao.zip(免费下载)[0 次下载]
by: 发表于：2017-09-07 15:47:52 顶(0) | 踩(0) 回复
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