package cm.android.util;
import android.annotation.TargetApi;
import android.view.KeyEvent;
/**
* 程序退出控制管理
*/
public class ExitHelper {
/**
* 退出操作接口
*/
public static interface IExitInterface {
/**
* 显示退出提示
*/
void showExitTip();
/**
* 退出
*/
void exit();
}
/**
* 按两次返回键退出
*/
public static class TwicePressHolder {
private long lastTime = 0;
private IExitInterface iExitInterface;
private int delay = 1000;
/**
* 按两次返回键退出
*/
public TwicePressHolder(IExitInterface iExitInterface, int delay) {
this.iExitInterface = iExitInterface;
this.delay = delay;
}
/**
* 在onKeyDown()中调用，返回false则说明未处理
*/
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK
&& event.getAction() == KeyEvent.ACTION_DOWN) {
if ((System.currentTimeMillis() - lastTime) > delay) {
iExitInterface.showExitTip();
lastTime = System.currentTimeMillis();
} else {
iExitInterface.exit();
}
return true;
}
return false;
}
}
/**
* 长按返回键退出
*/
public static class LongPressHolder {
private IExitInterface iExitInterface;
public LongPressHolder(IExitInterface iExitInterface) {
this.iExitInterface = iExitInterface;
}
/**
* 在dispatchKeyEvent()中调用，返回false则说明未处理
*/
@TargetApi(5)
public boolean dispatchKeyEvent(KeyEvent event) {
int keyCode = event.getKeyCode();
switch (keyCode) {
case KeyEvent.KEYCODE_BACK:
if (event.isLongPress()) {
iExitInterface.exit();
return true;
} else {
iExitInterface.showExitTip();
return true;
}
default:
break;
}
return false;
}
}
}