你用一个<activity-alias>作为你的主要/发射器吗？当我将 更改为<activity-alias>时<activity>，向上导航可以正常工作。出于某种奇怪的原因，涉及别名时导航无法正常工作。
还有一个奇怪的 UI 故障，表明本机 ActivityManager 存在错误。使用 导航到应用程序的主要活动后navigateUpTo()，按设备的返回键。当前应用程序将执行活动退出动画，然后紧接着，下一个最近的应用程序也将执行活动退出动画。即使您从 Android 的主屏幕启动到当前应用程序，也会发生这种情况。如果您清除所有最近的应用程序并再次尝试导航向上然后返回步骤，则在退出动画期间将呈现一个随机（即意外）应用程序。
在这些情况下，永远不应显示其他应用程序。似乎活动管理器没有正确管理历史堆栈。
可以在此差异底部显示的以下方法中找到有问题的错误：
+ public boolean navigateUpTo(IBinder token, Intent destIntent, int resultCode,
+ Intent resultData) {
+ ComponentName dest = destIntent.getComponent();
+
+ synchronized (this) {
+ ActivityRecord srec = ActivityRecord.forToken(token);
+ ArrayList<ActivityRecord> history = srec.stack.mHistory;
+ final int start = history.indexOf(srec);
+ if (start < 0) {
+ // Current activity is not in history stack; do nothing.
+ return false;
+ }
+ int finishTo = start - 1;
+ ActivityRecord parent = null;
+ boolean foundParentInTask = false;
+ if (dest != null) {
+ TaskRecord tr = srec.task;
+ for (int i = start - 1; i >= 0; i--) {
+ ActivityRecord r = history.get(i);
+ if (tr != r.task) {
+ // Couldn't find parent in the same task; stop at the one above this.
+ // (Root of current task; in-app "home" behavior)
+ // Always at least finish the current activity.
+ finishTo = Math.min(start - 1, i + 1);
+ parent = history.get(finishTo);
+ break;
+ } else if (r.info.packageName.equals(dest.getPackageName()) &&
+ r.info.name.equals(dest.getClassName())) {
+ finishTo = i;
+ parent = r;
+ foundParentInTask = true;
+ break;
+ }
+ }
+ }
+
+ if (mController != null) {
+ ActivityRecord next = mMainStack.topRunningActivityLocked(token, 0);
+ if (next != null) {
+ // ask watcher if this is allowed
+ boolean resumeOK = true;
+ try {
+ resumeOK = mController.activityResuming(next.packageName);
+ } catch (RemoteException e) {
+ mController = null;
+ }
+
+ if (!resumeOK) {
+ return false;
+ }
+ }
+ }
+ final long origId = Binder.clearCallingIdentity();
+ for (int i = start; i > finishTo; i--) {
+ ActivityRecord r = history.get(i);
+ mMainStack.requestFinishActivityLocked(r.appToken, resultCode, resultData,
+ "navigate-up");
+ // Only return the supplied result for the first activity finished
+ resultCode = Activity.RESULT_CANCELED;
+ resultData = null;
+ }
+
+ if (parent != null && foundParentInTask) {
+ final int parentLaunchMode = parent.info.launchMode;
+ final int destIntentFlags = destIntent.getFlags();
+ if (parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE ||
+ parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TASK ||
+ parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TOP ||
+ (destIntentFlags & Intent.FLAG_ACTIVITY_CLEAR_TOP) != 0) {
+ parent.deliverNewIntentLocked(srec.app.uid, destIntent);
+ } else {
+ try {
+ ActivityInfo aInfo = AppGlobals.getPackageManager().getActivityInfo(
+ destIntent.getComponent(), 0, UserId.getCallingUserId());
+ int res = mMainStack.startActivityLocked(srec.app.thread, destIntent,
+ null, aInfo, parent.appToken, null,
+ 0, -1, parent.launchedFromUid, 0, null, true, null);
+ foundParentInTask = res == ActivityManager.START_SUCCESS;
+ } catch (RemoteException e) {
+ foundParentInTask = false;
+ }
+ mMainStack.requestFinishActivityLocked(parent.appToken, resultCode,
+ resultData, "navigate-up");
+ }
+ }
+ Binder.restoreCallingIdentity(origId);
+ return foundParentInTask;
+ }
+ }