很多年前做Android开发，经常遇到页面跳转需要返回到指定页面的需求。现再次总结下：

一、ActivityA返回到ActivityB

ActivityA返回到ActivityB，回收掉中间页面

 Intent intent = new Intent(ActivityA.this,ActivityB.class);intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);startActivity(intent);

二、逐级返回

在除首页外的每一个页面重写onActivityResult方法：

/*** 页面退出回调* Author：William（徐威）* Create Time：2018-07-31** @param requestCode* @param resultCode* @param data*/
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {super.onActivityResult(requestCode, resultCode, data);if (requestCode == 0 && resultCode == RESULT_OK) {setResult(RESULT_OK);super.onDestroy();this.finish();}
}

在要返回的页面调用代码：

Intent intent = new Intent(ActivityA.this, ActivityB.class);
setResult(RESULT_OK, intent);

注意：这里的ActivityB是指当前活动的上一层，写好之后，会自动层层返回至首页。

三、页面管理工具

    ActivityPageManager

*** 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 nullDrawable 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 WebViewif (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();}}
}

返回直接调用 finishAllActivity