SMSContentObserver.java

package cn.com.uangel.mycontentobserver;


import android.content.Context;
import android.database.ContentObserver;
import android.database.Cursor;
import android.net.Uri;
import android.os.Handler;
import android.util.Log;


//用来观察系统里短消息的数据库变化  ”表“内容观察者,只要信息数据库发生变化，都会触发该ContentObserver 派生类
public class SMSContentObserver extends ContentObserver {
    private static String TAG = "SMSContentObserver";
	
    private int MSG_OUTBOXCONTENT = 2 ;
    
	private Context mContext  ;
	private Handler mHandler ;   //更新UI线程
	
	public SMSContentObserver(Context context,Handler handler) {
		super(handler);
		mContext = context ;
		mHandler = handler ;
	}
	/**
	 * 当所监听的Uri发生改变时，就会回调此方法
	 * 
	 * @param selfChange  此值意义不大 一般情况下该回调值false
	 */
    @Override
	public void onChange(boolean selfChange){
    	Log.i(TAG, "the sms table has changed");
    	
		//查询发件箱里的内容    	
    	Uri outSMSUri = Uri.parse("content://sms/sent") ;
    	
    	Cursor c = mContext.getContentResolver().query(outSMSUri, null, null, null,"date desc");
    	if(c != null){
    		
        	Log.i(TAG, "the number of send is"+c.getCount()) ;
        	
        	StringBuilder sb = new StringBuilder() ;
        	//循环遍历
        	while(c.moveToNext()){
//        		sb.append("发件人手机号码: "+c.getInt(c.getColumnIndex("address")))
//        		  .append("信息内容: "+c.getInt(c.getColumnIndex("body")))
//        		  .append("是否查看: "+c.getInt(c.getColumnIndex("read"))) 
//        		  .append("发送时间： "+c.getInt(c.getColumnIndex("date")))
//        		  .append("\n");
        		sb.append("发件人手机号码: "+c.getInt(c.getColumnIndex("address")))
      		      .append("信息内容: "+c.getString(c.getColumnIndex("body")))
      		      .append("\n");
        	}
        	c.close();       	
        	mHandler.obtainMessage(MSG_OUTBOXCONTENT, sb.toString()).sendToTarget();       	
    	}
	}
	
}