1.Android RemoteViews 定义
Android RemoteViews 可用在Notification中自定义通知栏布局。
因为Android 8.0创建通知栏的方式已经有所不同了。需要创建通知栏渠道，不然会报错，所以下面demo是以适配了Android 8.0通知栏来写的
学习目录：
image.png
1.Android 8.0通知栏适配
第一步：创建通知栏渠道：
/**
* 创建通知渠道
*
* @param channelId
* @param channelName
* @param importance
*/
@TargetApi(Build.VERSION_CODES.O)
private void createNotificationChannel(String channelId, String channelName, int importance) {
NotificationChannel channel = new NotificationChannel(channelId, channelName, importance);
NotificationManager notificationManager = (NotificationManager) getSystemService(
NOTIFICATION_SERVICE);
notificationManager.createNotificationChannel(channel);
}
第二步：在onCreate中调用创建通知栏渠道代码
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {//如果手机版本是Android 8.0版本或者更高
String channelId = "recommend";//渠道Id
String channelName = "推荐消息";//渠道名，给用户看的
int importance = NotificationManager.IMPORTANCE_DEFAULT;//重要等级默认
createNotificationChannel(channelId, channelName, importance);//创建渠道
}
第三步：发送通知：
xml 布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="sendRecommendMsg"
android:text="发送推荐消息" />
</LinearLayout>
Java代码：
/**
* 发送推荐通知
*
* @param view
*/
public void sendRecommendMsg(View view) {
NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
Notification notification = new NotificationCompat.Builder(this, "recommend")
.setContentTitle("收到一条推荐消息")
.setContentText("全场9折抢购中！")
.setWhen(System.currentTimeMillis())
.setSmallIcon(R.drawable.ic_launcher)
.setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher_background))
.setAutoCancel(true)
.build();
manager.notify(1, notification);
}
效果图：
image.png
点击后：
image.png
2.RemoteViews 使用：
RemoteViews的一些Api
1.构造方法：
第一个参数是包名，第二个是要加载的RemoteViews的布局资源文件。
public RemoteViews(String packageName, int layoutId) {
this(getApplicationInfo(packageName, UserHandle.myUserId()), layoutId);
}
2.提供的方法
设置TextView的内容
public void setTextViewText (int viewId, CharSequence text)
传入控件id和需要设置的字
设置ImageView 的内容
setImageViewResource(int viewId, int srcId)
控件id和图片资源
点击事件处理
setOnClickPendingIntent(int viewId, PendingIntent pendingIntent)
控件id和跳转intent
3.实例：
第一步:自定义RemoteView 内容
@NotNull
private RemoteViews getRemoteViews() {
Intent intent = new Intent(this, MainActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
RemoteViews remoteViews = new RemoteViews(getPackageName(), R.layout.remoteview);//RemoteView传入布局
remoteViews.setTextViewText(R.id.tv_left, "开始");//设置textView内容
remoteViews.setTextViewText(R.id.tv_right, "跳转");//设置textView内容
remoteViews.setImageViewResource(R.id.icon, R.drawable.ic_launcher);//设置图片样式
remoteViews.setOnClickPendingIntent(R.id.tv_right, pendingIntent);//点击跳转事件
return remoteViews;
}
第二步：在通知栏的基础上增加对自定义布局的支持
public void sendRecommendMsg(View view) {
RemoteViews remoteViews = getRemoteViews();//创建自定义布局
NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
Notification notification = new NotificationCompat.Builder(this, "recommend")
.setContentTitle("收到一条推荐消息")
.setContentText("全场9折抢购中！")
.setWhen(System.currentTimeMillis())
.setSmallIcon(R.drawable.ic_launcher)
.setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher_background))
.setAutoCancel(true)
.setContent(remoteViews)//在这里设置自定义通知的内容
.build();
manager.notify(1, notification);
}
RemoteViews 布局xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="48dp"
android:orientation="vertical"
android:paddingStart="48dp"
android:paddingEnd="48dp">
<ImageView
android:id="@+id/icon"
android:layout_width="48dp"
android:layout_height="48dp"
android:layout_centerInParent="true"
android:src="@drawable/ic_launcher_background" />
<TextView
android:id="@+id/tv_left"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:gravity="center_vertical"
android:text="Left" />
<TextView
android:id="@+id/tv_right"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_alignParentEnd="true"
android:gravity="center_vertical"
android:text="Right" />
</RelativeLayout>
点击后效果：
image.png
遇到的问题：
点击通知栏后通知无法消失：
改成如下：
Intent intent = new Intent(this, MainActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
RemoteViews remoteViews = getRemoteViews();
Notification notification = new NotificationCompat.Builder(this, "chat")
.setContentTitle("收到一条聊天消息")
.setContentText("今天中午吃什么？")
.setWhen(System.currentTimeMillis())
.setSmallIcon(R.drawable.ic_launcher_background)
.setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher_background))
.setContentIntent(pendingIntent).setAutoCancel(true)
.setContent(remoteViews)//在这里设置自定义通知的内容
.build();
xiaoMiShortCut(NotificationRemoteViewActivity.this, 20, notification);
manager.notify(1, notification);//解决点击后不会消失问题
private RemoteViews getRemoteViews() {
RemoteViews remoteViews = new RemoteViews(getPackageName(), R.layout.remoteview);//RemoteView传入布局
remoteViews.setTextViewText(R.id.tv_left, "开始");//通过id-内容的方式设置remoteview中控件的内容，底层实现是通过Binder跨进程通信
remoteViews.setTextViewText(R.id.tv_right, "跳转");
remoteViews.setImageViewResource(R.id.icon, R.drawable.ic_launcher);//设置图片样式
return remoteViews;
}
不在 getRemoteViews 处理点击跳转事件，在setContentIntent处理
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