Android设置通知Notification

Android系统提供Notification和NotificationManagement两个类来管理实现通知，通过这两个类我们可以显示广播信息的内容，还可以设置通知的铃声、震动、闪光灯。通过Activity类中的getSystemService这个方法获取NotificationManagement，再实例化Notification，最后再用NotificationManagement发送出去即可。注：获取Notification对象时，android api 11之后已经不推荐使用notification.setLatestEventInfo()方法了，推荐使用Notification.Builder 来实例化Notification。样例代码如下:

package com.yeetrack.broadcast;

import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.graphics.Color;

public class MainActivity extends Activity 
{

    private Button button1;
    private Button button2; 

    private Notification notification;
    private NotificationManager notificationManager;
    private static final int ID = 1;

    @Override
    protected void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button1 = (Button)findViewById(R.id.button1Id);
        button2 = (Button)findViewById(R.id.button2Id);
        notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        notification = new Notification();
        notification.icon = R.drawable.ic_launcher;
        notification.tickerText = "我的通知";
        notification.when = System.currentTimeMillis();

        OnClickListener onClickListener = new OnClickListener()
        {

            @Override
            public void onClick(View v)
            {
                switch( v.getId())
                {
                case R.id.button1Id:
                    Intent intent = new Intent(MainActivity.this, MainActivity.class);

                    PendingIntent pendingIntent = PendingIntent.getActivity(MainActivity.this, 0, intent, 0);
                    long[] vibrate = {0,100,200,300};
                    Notification.Builder builder = new Notification.Builder(MainActivity.this)
                        .setContentIntent(pendingIntent)
                        .setSmallIcon(R.drawable.ic_launcher)
                        .setTicker("我的消息")
                        .setWhen(System.currentTimeMillis())
                        .setContentTitle("标题")
                        .setContentText("内容")
                        .setSound(Uri.parse(Environment.getExternalStorageDirectory().getPath()+"/sound.mp3"))
                        .setVibrate(vibrate)
                        .setLights(Color.RED, 500, 500);
                    notification = builder.build();
                    notificationManager.notify(ID, notification);
                    break;
                case R.id.button2Id:
                    notificationManager.cancel(ID);
                    break;
                }

        }
    };
    button1.setOnClickListener(onClickListener);
    button2.setOnClickListener(onClickListener);
}

}

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