Android 实现双击退出的功能
实现android双击后退键退出当前APP功能
实现该功能基本思路是，
1，监听后退键，比较两次后退间隔，低于两秒则出发退出
2，退出当前APP
我选择在基类中BaseActivity中设置监听，代码如下：
publicvoidonBackPressed(){
//Preferences中获取是否双击退出
booleanisDoubleClick=true;
//BaseApplication.get("ifDoubleClickedBack",true);
if(isDoubleClick){
longcurTime=SystemClock.uptimeMillis();
if((curTime-mBackPressedTime)<(2*1000)){
finish();
//activity栈管理
AppManager.getAppManager().AppExit();
}else{
mBackPressedTime=curTime;
Toast.makeText(this,"再次点击退出",Toast.LENGTH_SHORT).show();
}
}else{
finish();
}
}
在退出当前APP中，参考开源中国，封装了activity栈
实例代码：
publicclassAppManager{
privatestaticStack<Activity>activityStack;
privatestaticAppManagerinstance;
privateAppManager(){
}
/**
*单一实例
*/
publicstaticAppManagergetAppManager(){
if(instance==null){
instance=newAppManager();
}
if(activityStack==null){
activityStack=newStack<Activity>();
}
returninstance;
}
/**
*获取指定的Activity
*
*@authorkymjs
*/
publicstaticActivitygetActivity(Class<?>cls){
if(activityStack!=null)
for(Activityactivity:activityStack){
if(activity.getClass().equals(cls)){
returnactivity;
}
}
returnnull;
}
/**
*添加Activity到堆栈
*/
publicvoidaddActivity(Activityactivity){
activityStack.add(activity);
}
/**
*获取当前Activity（堆栈中最后一个压入的）
*/
publicActivitycurrentActivity(){
Activityactivity=activityStack.lastElement();
returnactivity;
}
/**
*结束当前Activity（堆栈中最后一个压入的）
*/
publicvoidfinishActivity(){
Activityactivity=activityStack.lastElement();
finishActivity(activity);
}
/**
*结束指定的Activity
*/
publicvoidfinishActivity(Activityactivity){
if(activity!=null&&activityStack.contains(activity)){
activityStack.remove(activity);
activity.finish();
}
}
/**
*结束指定的Activity
*/
publicvoidremoveActivity(Activityactivity){
if(activity!=null&&activityStack.contains(activity)){
activityStack.remove(activity);
}
}
/**
*结束指定类名的Activity
*/
publicvoidfinishActivity(Class<?>cls){
for(Activityactivity:activityStack){
if(activity.getClass().equals(cls)){
finishActivity(activity);
break;
}
}
}
/**
*结束所有Activity
*/
publicvoidfinishAllActivity(){
for(inti=0,size=activityStack.size();i<size;i++){
if(null!=activityStack.get(i)){
finishActivity(activityStack.get(i));
}
}
activityStack.clear();
}
/**
*退出应用程序
*/
publicvoidAppExit(){
try{
finishAllActivity();
//System.exit(0);
}catch(Exceptione){
}
}
}
思路就是在每次activity压入activity栈中管理
在退出时遍历栈，挨个finish
希望本文所述对大家的Android程序设计有所帮助。