Android_按兩次返回鍵退出程序和長按返回鍵退出程序

時間 2019-12-08

標籤 android 按兩次返回退出程序欄目 Android 简体版

原文原文鏈接

以上兩個功能主要是參考了一下博客的:java

http://blog.csdn.net/chenshijun0101/article/details/7682210ide

http://blog.csdn.net/winlinking/article/details/6596455oop

方法一：post

按兩次返回鍵退出程序:this

Activity:spa

public class Back2FinishAppActivity extends Activity {
Exit exit = new Exit();

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
pressAgainExit();
return true;
}

return super.onKeyDown(keyCode, event);
}

private void pressAgainExit() {
if (exit.isExit()) {
finish();
} else {
Toast.makeText(getApplicationContext(), "再按一次退出程序",
Toast.LENGTH_SHORT).show();
exit.doExitInOneSecond();
}
}
}.net

輔助類Exit.javablog

private boolean isExit = false;
private Runnable task = new Runnable() {
@Override
public void run() {
isExit = false;
}
};

public void doExitInOneSecond() {
isExit = true;
HandlerThread thread = new HandlerThread("doTask");
thread.start();
new Handler(thread.getLooper()).postDelayed(task, 1000);
}

public boolean isExit() {
return isExit;
}

public void setExit(boolean isExit) {
this.isExit = isExit;
}get

長按返回鍵退出程序:博客

public boolean dispatchKeyEvent(KeyEvent event) { int keyCode=event.getKeyCode(); switch(keyCode) { case KeyEvent.KEYCODE_BACK: { if(event.isLongPress()) { this.stopService(intent); System.exit(0); return true; }else { return false; } } } return super.dispatchKeyEvent(event); }