Android开发之Activity管理工具类完整示例

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();    }  }}