怎样的android到攻通知，当打开最后一次活动 [英] android How to open last activity when tapping notification

问题描述

我观察过几个类似的问题，但他们couldn`t帮助我。我需要显示最后一个活动时，用户点击通知。这是我的code：

I have observed several similar questions but they couldn`t help me. I need to display last activity when user click notification. Here is my code:

NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(YourService.this)
        .setContentTitle(getResources().getText(R.string.app_name))
        .setContentText(getServiceStateDescription(YourService.this))
        .setSmallIcon(iconId)
        .setWhen(System.currentTimeMillis());

Intent nIntent = getPreviousIntent();
TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
// Adds the back stack
stackBuilder.addParentStack(MainActivity_.class);
stackBuilder.addNextIntent(nIntent);
PendingIntent pendingIntent =
        stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
notificationBuilder.setContentIntent(pendingIntent);

startForeground(ContextConstants.LAUNCHER_SERVICE_NOTE_ID, notificationBuilder.build());


private Intent getPreviousIntent() {
Intent newIntent = null;
final ActivityManager activityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
    final List<ActivityManager.AppTask> recentTaskInfos = activityManager.getAppTasks();
    if (!recentTaskInfos.isEmpty()) {
        for (ActivityManager.AppTask appTaskTaskInfo: recentTaskInfos) {
            if (appTaskTaskInfo.getTaskInfo().baseIntent.getComponent().getPackageName().equals(ContextConstants.PACKAGE_NAME)) {
                newIntent = appTaskTaskInfo.getTaskInfo().baseIntent;
                newIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            }
        }
    }
} else {
    final List<ActivityManager.RecentTaskInfo> recentTaskInfos = activityManager.getRecentTasks(1024, 0);
    if (!recentTaskInfos.isEmpty()) {
        for (ActivityManager.RecentTaskInfo recentTaskInfo: recentTaskInfos) {
            if (recentTaskInfo.baseIntent.getComponent().getPackageName().equals(ContextConstants.PACKAGE_NAME)) {
                newIntent = recentTaskInfo.baseIntent;
                newIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            }
        }
    }
}
if (newIntent == null) newIntent = new Intent();
return newIntent;

}

第二个问题是，如果我用德$ P $，以建立通知pcated metods，显示上次活动的伟大工程，因为我想在这里为code：

Second point is that if i used deprecated metods in order to build notification, displaying last activity works great as i wanted here is code:

Notification note = new Notification(iconId,
            getResources().getText(R.string.serviceStarted),
            System.currentTimeMillis());
    note.flags |= Notification.FLAG_ONGOING_EVENT;
    note.flags |= Notification.FLAG_NO_CLEAR;

    Intent nIntent = new Intent();
    nIntent = getPreviousIntent(nIntent);
    PendingIntent pi = PendingIntent.getActivity(this, 0, nIntent, 0);
    note.setLatestEventInfo(this,
            getResources().getText(R.string.app_name), getServiceStateDescription(YourService.this), pi);

    startForeground(ContextConstants.LAUNCHER_SERVICE_NOTE_ID, note);

但我不想去使用precated metods了，这就是为什么我在这里解释。在此先感谢！

和我见过这文档为好。

下面是我的清单：

<?xml version="1.0" encoding="utf-8"?>

<permission android:name="com.my.package.permission.C2D_MESSAGE" android:protectionLevel="signature" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.VIBRATE"/>
<uses-permission android:name="android.permission.WAKE_LOCK"/>
<uses-permission android:name="android.permission.READ_CONTACTS"/>
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<uses-permission android:name="com.my.package.permission.C2D_MESSAGE" />
<uses-permission android:name="android.permission.GET_TASKS"/>

<application
    android:name=".MyApplication"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/Theme.AppCompat.Light">
    <activity android:name=".activity.StartingActivity_"  android:label="@string/app_name">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name=".activity.MainActivity_"
        android:configChanges="orientation|screenSize">
    </activity>
    <activity
        android:name=".activity.ComposeEmailActivity_"
        android:configChanges="orientation|screenSize"
        android:parentActivityName=".activity.MainActivity_">
        <meta-data
            android:name="android.support.PARENT_ACTIVITY"
            android:value=".activity.MainActivity_" />
    </activity>
    <activity
        android:name=".activity.EditAccountActivity_"
        android:configChanges="orientation|screenSize"
        android:parentActivityName=".activity.MainActivity_">
        <meta-data
            android:name="android.support.PARENT_ACTIVITY"
            android:value=".activity.MainActivity_" />
    </activity>               

    <!--android:process=":remote" is for working in background-->
    <service android:enabled="true" android:name=".service.YourService"/>       

</application>

推荐答案

您的问题是不是与您正在使用构建的通知方法。你的问题是你使用 TaskStackBuilder 的。使用这个类进行了大量的幕后隐藏的神奇，这让很多假设，了解自己的想要的应用程序的行为。不幸的是，这些假设大多是错的： - （

Your problem isn't with the methods you are using to build the Notification. Your problem is your use of TaskStackBuilder. Using this class performs a lot of hidden magic behind the scenes and it makes a lot of assumptions about how your want the app to behave. Unfortunately, these assumptions are mostly wrong :-(

如果你只是想要把你的应用前景的任何状态这是当它跑到后台，你不希望使用 TaskStakBuilder 和你也不必使用所有这些讨厌的 ActivityManager 的方法。只要做到这一点：

If you just want to bring your application to the foreground in whatever state it was in when it went to the background, you don't want to use TaskStakBuilder and you also don't have to use all those nasty ActivityManager methods. Just do this:

NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(YourService.this)
    .setContentTitle(getResources().getText(R.string.app_name))
    .setContentText(getServiceStateDescription(YourService.this))
    .setSmallIcon(iconId)
    .setWhen(System.currentTimeMillis());

Intent nIntent = getPackageManager().
        getLaunchIntentForPackage(ContextConstants.PACKAGE_NAME);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, nIntent,
    PendingIntent.FLAG_UPDATE_CURRENT);
notificationBuilder.setContentIntent(pendingIntent);

startForeground(ContextConstants.LAUNCHER_SERVICE_NOTE_ID,
    notificationBuilder.build());

这篇关于怎样的android到攻通知，当打开最后一次活动的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！