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：
public void onBackPressed() {
//Preferences 中获取是否双击退出
boolean isDoubleClick = true;
//BaseApplication.get("ifDoubleClickedBack", true);
if (isDoubleClick) {
long curTime = 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：
public class AppManager {
private static Stack<Activity> activityStack;
private static AppManager instance;
private AppManager() {
}
/**
* 单一实例
*/
public static AppManager getAppManager() {
if (instance == null) {
instance = new AppManager();
}
if (activityStack == null) {
activityStack = new Stack<Activity>();
}
return instance;
}
/**
* 获取指定的Activity
*
* @author kymjs
*/
public static Activity getActivity(Class<?> cls) {
if (activityStack != null)
for (Activity activity : activityStack) {
if (activity.getClass().equals(cls)) {
return activity;
}
}
return null;
}
/**
* 添加Activity到堆栈
*/
public void addActivity(Activity activity) {
activityStack.add(activity);
}
/**
* 获取当前Activity（堆栈中最后一个压入的）
*/
public Activity currentActivity() {
Activity activity = activityStack.lastElement();
return activity;
}
/**
* 结束当前Activity（堆栈中最后一个压入的）
*/
public void finishActivity() {
Activity activity = activityStack.lastElement();
finishActivity(activity);
}
/**
* 结束指定的Activity
*/
public void finishActivity(Activity activity) {
if (activity != null && activityStack.contains(activity)) {
activityStack.remove(activity);
activity.finish();
}
}
/**
* 结束指定的Activity
*/
public void removeActivity(Activity activity) {
if (activity != null && activityStack.contains(activity)) {
activityStack.remove(activity);
}
}
/**
* 结束指定类名的Activity
*/
public void finishActivity(Class<?> cls) {
for (Activity activity : activityStack) {
if (activity.getClass().equals(cls)) {
finishActivity(activity);
break;
}
}
}
/**
* 结束所有Activity
*/
public void finishAllActivity() {
for (int i = 0, size = activityStack.size(); i < size; i++) {
if (null != activityStack.get(i)) {
finishActivity(activityStack.get(i));
}
}
activityStack.clear();
}
/**
* 退出应用程序
*/
public void AppExit() {
try {
finishAllActivity();
// System.exit(0);
} catch (Exception e) {
}
}
}
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。
