Android使用Notification实现普通通知栏（一）

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:id="@+id/activity_main"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 tools:context="com.example.administrator.day12.MainActivity">
 <Button
  android:text="显示通知"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:id="@+id/button"
  android:onClick="show1" />
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:id="@+id/activity_content"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 tools:context="com.example.administrator.day12.ContentActivity">
 <TextView
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:gravity="center"
  android:textSize="30sp"
  android:text="十胜十败" />
</LinearLayout>

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
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.RemoteViews;
public class MainActivity extends AppCompatActivity {
 private static final int NO_1 =0x1 ;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
 }
 public void show1(View v){
  NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
  builder.setSmallIcon(R.mipmap.guojia);
  builder.setContentTitle("郭嘉");
  builder.setContentText("我们打袁绍吧");
  //设置Notification.Default_ALL(默认启用全部服务(呼吸灯，铃声等)
  builder.setDefaults(Notification.DEFAULT_ALL);
  //调用NotificationCompat.Builder的setContentIntent()来添加PendingIntent
  Intent intent = new Intent(this, ContentActivity.class);
  intent.putExtra("info", "郭嘉给你发了一个计策！");
  PendingIntent pi = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
  builder.setContentIntent(pi);
  //获取Notification
  Notification n = builder.build();
  //通过NotificationCompat.Builder.build()来获得notification对象自己
  NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
  //然后调用NotificationManager.notify()向系统转交
  manager.notify(NO_1, n);
 }
} 

public class ContentActivity extends AppCompatActivity {
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_content);
  //通过获取MainActivity中设置的putExtra获取土司内容
  Toast.makeText(this, getIntent().getStringExtra("info"), Toast.LENGTH_SHORT).show();
 }
}