android - RemoteView 不在自定义通知中显示按钮

Question

我正在通过集成 RemoteViews 实现自定义推送通知。问题是，remoteview 中的按钮没有显示。我没有弄错我做错了什么。

代码:

public class AlarmReceiver extends BroadcastReceiver {
    Bitmap bannerimage;
    private static int MY_NOTIFICATION_ID=1;
     NotificationManager notificationManager;
     Notification myNotification;

    @SuppressLint("NewApi")
    @Override
    public void onReceive(Context context, Intent intent) {


        bannerimage = BitmapFactory.decodeResource(context.getResources(),
                R.drawable.dummyturkey);
        MY_NOTIFICATION_ID=1;
        RemoteViews remoteViews = new RemoteViews(context.getPackageName(),
                R.layout.custom_push_layout);
        Intent myIntent = new Intent(context,DoSomething.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(
                context, 
                MY_NOTIFICATION_ID, 
                myIntent, 
                Intent.FLAG_ACTIVITY_NEW_TASK);
        Uri alarmSound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);

        String mydate = java.text.DateFormat.getDateTimeInstance().format(Calendar.getInstance().getTime());
        System.out.println("Alarm fired AlarmReciever:"+mydate);

        remoteViews.setImageViewBitmap(R.id.imgbanner,bannerimage);

        Notification myNotification  = new Notification.Builder(context)
        .setContent(remoteViews)
        .setSmallIcon(R.drawable.ic_launcher)
        .setContentIntent(pendingIntent)
        .setWhen(System.currentTimeMillis())
        .setSound(alarmSound)
        .setAutoCancel(false).build();



        NotificationManager notificationManager = 
                (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(MY_NOTIFICATION_ID, myNotification);


        }

    }

XML 文件 custom_push_layout.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#ffffff"
    android:orientation="vertical" >

    <ImageView
        android:id="@+id/imgbanner"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:adjustViewBounds="true"
        android:background="@drawable/ic_launcher"
        android:scaleType="fitXY" />

    <TextView
        android:id="@+id/txt1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="This chicken has send you a friend request" />

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <Button
            android:id="@+id/btnaccept"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Accept" />

        <Button

            android:id="@+id/btncancel"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_toRightOf="@+id/btnaccept"

            android:text="Cancel" />
    </RelativeLayout>

</LinearLayout>

通知来了，但它只显示 ImageView ，而不显示布局中的按钮或 TextView 。

请仅引用上述代码给出解决方案，即我做错了什么或遗漏了什么。请不要发布新代码。

Answer 1

使用 Notification.Builder(context).setContent 您可以为通知设置普通 View 布局。根据Notifications API Guide普通 View 布局高度限制为 64dp。

The height available for a custom notification layout depends on the notification view. Normal view layouts are limited to 64 dp, and expanded view layouts are limited to 256 dp.

您需要做的是将 contentView 和 bigContentView 设置为 Notification 对象。创建两个单独的布局，一个用于普通布局，一个用于大 View 布局，并创建两个 RemoteViews。

 RemoteViews customViewSmall = new RemoteViews(context.getPackageName(), R.layout.custom_notification_small);
 RemoteViews customViewBig = new RemoteViews(context.getPackageName(), R.layout.custom_notification_big);

... 
set the values of the views
...

 Notification myNotification  = new Notification.Builder(context)
        .setSmallIcon(R.drawable.ic_launcher)
        .setContentIntent(pendingIntent)
        .setWhen(System.currentTimeMillis())
        .setSound(alarmSound)
        .setAutoCancel(false).build();

 myNotification.contentView = customViewSmall;
 myNotification.bigContentView = customViewBig; 

请注意 bigContentView 可从 API16 获得。同样在 UI xml 中，为所有 TextView View 添加颜色。

编辑:在 v4 支持库 24 中，NotificationBuilderCompat 具有新方法 setCustomBigContentView()，因此将 remoteViews 设置为 Notification对象，只需使用 NotificationBuilderCompat。你可以在这里看到它:Notification API Guide.

结果: