Notification消息通知（消息合并且显示条数，自定义消息通知内容布局）

最新推荐文章于 2021-05-29 23:12:05 发布

转载最新推荐文章于 2021-05-29 23:12:05 发布 · 3.6k 阅读

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#android #消息合并 #通知栏消息通知 #广播消息

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本文介绍了一种在Android应用中自定义通知栏消息的方法。通过创建特定布局文件和使用BroadcastReceiver，可以实现在通知栏展示定制的消息内容，并支持点击跳转至详情页面的功能。

没找到原创作者，所以也不知道来自何处，只有等以后知道原创作者后再补上来源网址！！！

具体操作：自定义消息通知内容布局；点击界面中心的“点击发送消息”TextView控件，模拟发送通知消息，通知栏接收消息，点击几次则发送几次，点击通知栏消息，跳转到详情界面。

1.activity_main.xml：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/tv_show"
        android:text="点击发送消息"
        android:textSize="24sp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

</LinearLayout>

2.layout_item.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="match_parent" >

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:src="@mipmap/ic_launcher" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="18dp"
        android:layout_toRightOf="@+id/imageView1"
        android:text="TextView" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView1"
        android:layout_below="@+id/textView1"
        android:layout_marginTop="15dp"
        android:text="TextView" />

    <TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textView1"
        android:layout_marginLeft="54dp"
        android:layout_toRightOf="@+id/textView2"
        android:text="TextView" />

    <TextView
        android:id="@+id/textView4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/textView1"
        android:text="TextView" />

</RelativeLayout>

3.activity_detail.xml：

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


    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Text"
        android:id="@+id/name"
        android:textSize="18sp"
        android:layout_gravity="center_horizontal"/>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Text"
        android:id="@+id/price"
        android:textSize="18sp"
        android:layout_gravity="center_horizontal"/>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Text"
        android:id="@+id/detail"
        android:textSize="18sp"
        android:layout_gravity="center_horizontal"/>
</LinearLayout>

4.SingletonF类：

/**
 * 用于存储消息数目
 * Created by admin on 2017/9/4.
 */

public class SingletonF{

    private  int info_number=0;

    private static class SingletonHolder {
        /**
         * 单例对象实例
         */
       static final SingletonF INSTANCE = new SingletonF();
    }

    public static SingletonF getInstance() {
        return SingletonHolder.INSTANCE;
    }

    /**
    * private的构造函数用于避免外界直接使用new来实例化对象
    */
    private SingletonF() {}

    public  int getInfo_number() {
        return info_number;
    }

    public  void setInfo_number(int info_number) {
        this.info_number = info_number;
    }

//    /**
//     * 若SingletonF implements Serializable则必须实现readResolve方法
//     * readResolve方法应对单例对象被序列化时候
//     */
//    private Object readResolve() {
//        return getInstance();
//    }

}

5.MyBroadcastReceiver类：

import java.text.SimpleDateFormat;
import java.util.Date;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Handler;
import android.os.Message;
import android.support.v4.app.NotificationCompat;
import android.util.Log;
import android.widget.RemoteViews;

public class MyBroadcastReceiver extends BroadcastReceiver {

    private SingletonF singletonF;
    private Context context1;

    @Override
    public void onReceive(Context context, Intent intent) {
        this.context1 = context;
//      if (intent.getStringExtra("info").equals("广播发送了")) {
//          Log.i("静态广播：", "广播我已经接受了");
//      }
        Message message = handler.obtainMessage();
        message.what = 0;
        handler.sendMessage(message);
    }

    private Handler handler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case 0:
                    singletonF = SingletonF.getInstance();
                    int first = singletonF.getInfo_number();
                    first++;
                    Date nowTime = new Date(System.currentTimeMillis());
                    SimpleDateFormat sdFormatter = new SimpleDateFormat("HH:mm");
                    String retStrFormatNowDate = sdFormatter.format(nowTime);
                    singletonF.setInfo_number( first);

                    RemoteViews contentViews = new RemoteViews(context1.getPackageName(), R.layout.layout_item);
                    // 通过控件的Id设置属性
                    contentViews.setImageViewResource(R.id.imageView1, R.mipmap.ic_launcher_round);
                    contentViews.setTextViewText(R.id.textView1, "消息标题");
                    contentViews.setTextViewText(R.id.textView2, "消息内容");
                    contentViews.setTextViewText(R.id.textView3, " (" + first + "条新消息)");
                    contentViews.setTextViewText(R.id.textView4, "" + retStrFormatNowDate);
                    // 点击通知栏跳转的activity
                    Intent intent = new Intent(context1, ActDetail.class);
                    PendingIntent pendingIntent = PendingIntent.getActivity(context1, 0, intent,
                            PendingIntent.FLAG_CANCEL_CURRENT);

                    NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context1)
                            .setSmallIcon(R.mipmap.ic_launcher_round).setTicker("new message");
                    // 自动管理通知栏消息
                    mBuilder.setAutoCancel(true);
                    mBuilder.setContentIntent(pendingIntent);
                    /// 自定义布局
                    mBuilder.setContent(contentViews);
                    // 使用默认提示音
                    mBuilder.setDefaults(Notification.DEFAULT_ALL);
                    NotificationManager mNotificationManager = (NotificationManager) context1
                            .getSystemService(context1.NOTIFICATION_SERVICE);
                    // notify(int id, Notification notification)若id为同一个值，则通知栏只会显示一行，并不停更新此消息内容
                    // 若为类似UUID.randomUUID().hashCode()这样不同的唯一标识符，则有几条消息通知栏就显示几行
                    mNotificationManager.notify(1, mBuilder.build());

                    break;
                default:
                    break;
            }
        }
    };

}

6.MainActivity类：

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    private TextView tv_show;
    private int btn_number = 0;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        tv_show = (TextView) this.findViewById( R.id.tv_show);
        tv_show.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                showNotify();
                btn_number++;
                tv_show.setText("发送了" + btn_number + "次广播");
            }
        });
    }

    private void showNotify() {
        Intent intent = new Intent();
        intent.setAction("MASSAGE_NOTIFICATION");
//        intent.putExtra("info", "广播发送了");
        sendBroadcast(intent);
    }

    @Override
    protected void onStop() {
        btn_number = 0;
        tv_show.setText("发送了" + btn_number + "次广播");
        super.onStop();
    }

    @Override
    protected void onPause() {
        btn_number = 0;
        tv_show.setText("发送了" + btn_number + "次广播");
        super.onPause();
    }

    @Override
    protected void onDestroy() {
        btn_number = 0;
        super.onDestroy();
    }

}

7.ActDetail类：

import android.app.NotificationManager;
import android.content.Context;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;

/**
 * Created by admin on 2017/9/4.
 */

public class ActDetail extends AppCompatActivity{

    NotificationManager notificationManager;
    SingletonF singletonF;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_detail);

        singletonF = SingletonF.getInstance();
        notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.cancel(1);
        singletonF.setInfo_number(0);
    }
}