Android开发之Activity管理工具类完整示例

本文实例讲述了Android开发之Activity管理工具类。分享给大家供大家参考，具体如下：

这个工具类是对Activity的一些管理，非常适用

package com.maobang.imsdk.util;
import java.util.Stack;
import android.app.Activity;
import android.app.ActivityManager;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView;
import android.widget.ImageView;
import android.widget.ListView;
/**
* Activity管理类
* Created by Administrator on 2016/11/24.
*/
public class ActivityPageManager {
private static Stack<Activity> activityStack;
private static ActivityPageManager instance;
/**
* constructor
*/
private ActivityPageManager() {
}
/**
* get the AppManager instance, the AppManager is singleton.
*/
public static ActivityPageManager getInstance() {
if (instance == null) {
instance = new ActivityPageManager();
}
return instance;
}
/**
* add Activity to Stack
*/
public void addActivity(Activity activity) {
if (activityStack == null) {
activityStack = new Stack<Activity>();
}
activityStack.add(activity);
}
/**
* remove Activity from Stack
*/
public void removeActivity(Activity activity) {
if (activityStack == null) {
activityStack = new Stack<Activity>();
}
activityStack.remove(activity);
}
/**
* get current activity from Stack
*/
public Activity currentActivity() {
Activity activity = activityStack.lastElement();
return activity;
}
/**
* finish current activity from Stack
*/
public void finishActivity() {
Activity activity = activityStack.lastElement();
finishActivity(activity);
}
/**
* finish the Activity
*/
public void finishActivity(Activity activity) {
if (activity != null) {
activityStack.remove(activity);
activity.finish();
activity = null;
}
}
/**
* finish the Activity
*/
public void finishActivity(Class<?> cls) {
for (Activity activity : activityStack) {
if (activity.getClass().equals(cls)) {
finishActivity(activity);
}
}
}
/**
* finish all Activity
*/
public void finishAllActivity() {
if(activityStack!=null&&activityStack.size()>0)
{
for (int i = 0, size = activityStack.size(); i < size; i++) {
if (null != activityStack.get(i)) {
activityStack.get(i).finish();
}
}
activityStack.clear();
}
}
/**
* release all resourse for view
* @param view
*/
public static void unbindReferences(View view) {
try {
if (view != null) {
view.destroyDrawingCache();
unbindViewReferences(view);
if (view instanceof ViewGroup){
unbindViewGroupReferences((ViewGroup) view);
}
}
} catch (Throwable e) {
// whatever exception is thrown just ignore it because a crash is
// always worse than this method not doing what it's supposed to do
}
}
private static void unbindViewGroupReferences(ViewGroup viewGroup) {
int nrOfChildren = viewGroup.getChildCount();
for (int i = 0; i < nrOfChildren; i++) {
View view = viewGroup.getChildAt(i);
unbindViewReferences(view);
if (view instanceof ViewGroup)
unbindViewGroupReferences((ViewGroup) view);
}
try {
viewGroup.removeAllViews();
} catch (Throwable mayHappen) {
// AdapterViews, ListViews and potentially other ViewGroups don't
// support the removeAllViews operation
}
}
@SuppressWarnings("deprecation")
private static void unbindViewReferences(View view) {
// set all listeners to null (not every view and not every API level
// supports the methods)
try {
view.setOnClickListener(null);
view.setOnCreateContextMenuListener(null);
view.setOnFocusChangeListener(null);
view.setOnKeyListener(null);
view.setOnLongClickListener(null);
view.setOnClickListener(null);
} catch (Throwable mayHappen) {
}
// set background to null
Drawable d = view.getBackground();
if (d != null){
d.setCallback(null);
}
if (view instanceof ImageView) {
ImageView imageView = (ImageView) view;
d = imageView.getDrawable();
if (d != null){
d.setCallback(null);
}
imageView.setImageDrawable(null);
imageView.setBackgroundDrawable(null);
}
// destroy WebView
if (view instanceof WebView) {
WebView webview = (WebView) view;
webview.stopLoading();
webview.clearFormData();
webview.clearDisappearingChildren();
webview.setWebChromeClient(null);
webview.setWebViewClient(null);
webview.destroyDrawingCache();
webview.destroy();
webview = null;
}
if (view instanceof ListView) {
ListView listView = (ListView) view;
try {
listView.removeAllViewsInLayout();
} catch (Throwable mayHappen) {
}
((ListView) view).destroyDrawingCache();
}
}
/**
* exit System
* @param context
*/
public void exit(Context context) {
exit(context, true);
}
/**
* exit System
* @param context
* @param isClearCache
*/
@SuppressWarnings("deprecation")
public void exit(Context context, boolean isClearCache) {
try {
finishAllActivity();
if(context != null){
ActivityManager activityMgr = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
activityMgr.restartPackage(context.getPackageName());
}
//      if(isClearCache){
//        LruCacheManager.getInstance().evictAll();
//        CacheManager.clearAll();
//      }
System.exit(0);
android.os.Process.killProcess(android.os.Process.myPid());
} catch (Exception e) {
e.printStackTrace();
}
}
}

更多关于Android相关内容感兴趣的读者可查看本站专题：《Android编程之activity操作技巧总结》、《Android开发入门与进阶教程》、《Android视图View技巧总结》、《Android文件操作技巧汇总》、《Android资源操作技巧汇总》及《Android控件用法总结》

希望本文所述对大家Android程序设计有所帮助。

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