Android--使用Notification在通知栏显示消息

　　在一个Activity中点击按钮，产生一个通知栏消息通知。

package cn.luxh.mynotice;

import android.os.Bundle;
import android.util.Log;
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;

public class MainActivity extends Activity {
    private static String TAG = "MyNotice";
    private static int notificationID = 1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        handleBtnDisplayNotification();
    }

    /**
     * 点击按钮，创建消息通知
     */
    private void handleBtnDisplayNotification() {
        Button btnDisplayNotification = (Button) findViewById(R.id.btn_display_notice);
        btnDisplayNotification.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.i(TAG, "点击按钮");
                Intent i = new Intent(MainActivity.this,NoticeViewActivity.class);
                i.putExtra("notificationID", notificationID);
                PendingIntent pi = PendingIntent.getActivity(MainActivity.this, 0, i, 0);
                NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);

                //创建通知对象
                Notification n = new Notification.Builder(MainActivity.this)
                                                                    .setContentTitle("有来自黑莓的新邮件")
                                                                    .setContentText("黑莓，依然经典！")
                                                                    .setSmallIcon(R.drawable.ic_launcher)
                                                                    .setContentIntent(pi)
                                                                    .build();
                //振动手机
                n.vibrate = new long[]{100,250,100,500};
                nm.notify(notificationID, n);
            }
        });
    }

}

package cn.luxh.mynotice;

import android.app.Activity;
import android.app.NotificationManager;
import android.os.Bundle;
import android.util.Log;

/**
 * 在通知栏点击通知后显示消息的界面
 * @author Luxh
 *
 */
public class NoticeViewActivity extends Activity{

    private static String TAG = "MyNotice";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        Log.i(TAG, "NoticeViewActivity onCreate");
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_notice_view);

        NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        //取消通知
        nm.cancel(getIntent().getExtras().getInt("notificationID"));
    }
}

运行效果：