# ActivityBackStackTest

**Repository Path**: threekiloton/ActivityBackStackTest

## Basic Information

- **Project Name**: ActivityBackStackTest
- **Description**: activity 回退栈测试
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2018-09-28
- **Last Updated**: 2020-12-19

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

## Activity构建导航

* 添加parent

```
<activity
    android:name=".DetailActivity"
    android:parentActivityName=".HomeActivity">
      <meta-data
          android:name="android.support.PARENT_ACTIVITY"
          android:value=".HomeActivity"/>
</activity>
```

* 构建任务栈

```
Intent intent = new Intent( this, DetailActivity.class );
intent.setFlags( Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_SINGLE_TOP );
TaskStackBuilder taskStackBuilder = TaskStackBuilder.create( this );
taskStackBuilder.addParentStack( DetailActivity.class );
taskStackBuilder.addNextIntent( intent );
```

* 可以直接启动

```
taskStackBuilder.startActivities();
```

![](img/pic01.gif)

* 可是使用Notification

```
PendingIntent pendingIntent = taskStackBuilder
    .getPendingIntent( 0, PendingIntent.FLAG_UPDATE_CURRENT );
    
String channel = getChannel();
Notification notification = new Builder( this, channel )
    .setSmallIcon( R.drawable.ic_launcher_foreground )
    .setContentTitle( "new Notification" )
    .setContentText( "this is a TaskStack notification " )
    .setAutoCancel( true )
    .setContentIntent( pendingIntent )
    .build();
    
NotificationManager notificationManager = (NotificationManager) getSystemService(
    Context.NOTIFICATION_SERVICE );
assert notificationManager != null;
notificationManager.notify( 12, notification );
```

```
private String getChannel ( ) {
      if( VERSION.SDK_INT > VERSION_CODES.O ) {
            int importance = NotificationManager.IMPORTANCE_DEFAULT;
            /* 必须设置 importance */
            NotificationChannel channel = new NotificationChannel(
                "CHANNEL", "CHANNEL_NAME", importance );
            channel.setDescription( "this is test notification channel" );
            NotificationManager notificationManager = getSystemService(
                NotificationManager.class );
            assert notificationManager != null;
            notificationManager.createNotificationChannel( channel );
            return "CHANNEL";
      } else {
            return "CHANNEL";
      }
}
```



![](img/pic02.gif)