从通知启动的子活动不会在向上导航时返回到父级

Question

我从通知抽屉中的通知开始一项活动 - 谁有父活动.子活动已启用导航功能.我希望在单击向上导航按钮时子活动返回到父活动.此行为适用于正常的应用程序流.但是,当用户通过通知输入子活动时,单击向上导航按钮不会将用户带到父活动; 相反,它结束了应用程序.

以下是单击通知时应启动的活动的清单.它有一个父母TabbedActivity

<activity
    android:name=".activity.AnimalDetailsActivity"
    android:parentActivityName=".activity.TabbedActivity" >
<meta-data
    android:name="android.support.PARENT_ACTIVITY"
    android:value=".activity.TabbedActivity"/>
</activity>

这是我生成通知和意图的地方:

Intent resultIntent = new Intent(context.getApplicationContext(), AnimalDetailsActivity.class);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(context.getApplicationContext());
stackBuilder.addParentStack(AnimalDetailsActivity.class);
stackBuilder.addNextIntent(resultIntent);
PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);

NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
    .setSmallIcon(icon_resource_id)
    .setLargeIcon(large_icon)
    .setContentTitle(title)
    .setContentText(text)
    .setContentIntent(resultPendingIntent)
    .setAutoCancel(true);

return builder.build();

然后我发送它们

private static void sendNotifications(List<android.app.Notification> notifications) {
  NotificationManager manager = (NotificationManager)   context.getSystemService(Context.NOTIFICATION_SERVICE);
  for (android.app.Notification notification : notifications) {
    manager.notify(++drawerId, notification);
  }
}

在目标活动中,我启用向上按钮箭头和向上导航:

@Override
protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  getActionBar().setHomeButtonEnabled(true);
  getActionBar().setDisplayHomeAsUpEnabled(true);

我相信我正确地遵循指南.那么为什么向上箭头没有将用户带到父活动？

Answer 1

根据文档,onOptionsItemSelected()如果使用新的后台堆栈启动活动,则应按如下方式实现回调:

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    // Respond to the action bar's Up/Home button
    case android.R.id.home:
        Intent upIntent = NavUtils.getParentActivityIntent(this);
        if (NavUtils.shouldUpRecreateTask(this, upIntent)) {
            // This activity is NOT part of this app's task, so create a new task
            // when navigating up, with a synthesized back stack.
            TaskStackBuilder.create(this)
                    // Add all of this activity's parents to the back stack
                    .addNextIntentWithParentStack(upIntent)
                    // Navigate up to the closest parent
                    .startActivities();
        } else {
            // This activity is part of this app's task, so simply
            // navigate up to the logical parent activity.
            NavUtils.navigateUpTo(this, upIntent);
        }
        return true;
    }
    return super.onOptionsItemSelected(item);
}