android开发之通知栏消息

Demo功能，在A中点击按钮，弹出通知栏消息，点击消息之后转入B中，实现如下:
MainActivity的布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.cn.yllen.notificationtest.MainActivity">
    <Button
        android:id="@+id/button_notifiy"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Send notice"/>
</RelativeLayout>

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.graphics.BitmapFactory;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.app.NotificationCompat;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity implements View.OnClickListener
{
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button button = (Button) findViewById(R.id.button_notifiy);
        button.setOnClickListener(this);
    }
    @Override
    public void onClick(View v) {
        switch(v.getId())
        {
            case R.id.button_notifiy:
                Intent intent = new Intent(this,NotificationActivity.class);
                //异步消息
                PendingIntent pi = PendingIntent.getActivity(this,0,intent,0);
                NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
                Notification  notification = new NotificationCompat.Builder(this).setContentText("This is a Test Notice")
                        .setContentTitle("Notice").setWhen(System.currentTimeMillis())
                        .setSmallIcon(R.mipmap.ic_launcher)
                        .setLargeIcon(BitmapFactory.decodeResource(getResources(),R.mipmap.ic_launcher))
                        .setContentIntent(pi)           //延迟处理intent
                        .setAutoCancel(true)            //点击后消失
                        .build();
                manager.notify(1,notification);
                break;
            default:
                break;
        }
    }
}

NotificationActivity的布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.cn.yllen.notificationtest.NotificationActivity">
<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerInParent="true"
    android:textSize="24sp"
    android:text="This is notification layout~~"/>
</RelativeLayout>

实现如下

import android.app.NotificationManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
public class NotificationActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_notification);
        //NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        //notificationManager.cancel(1);      //关闭id=1的消息框
    }
}