SMSContentObserver.java

package com.sogouchat.os;

import java.util.LinkedList;

import com.sogouchat.bean.MsgNode;

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


public class SMSContentObserver extends ContentObserver {
    private static String TAG = "SMSContentObserver";
	
    
	private Context mContext  ;
	private Handler mHandler ;   //更新UI线程
	MsgService mChatSrv;
	
	public SMSContentObserver(Context context,Handler handler, MsgService chatSrv) {
		super(handler);
		mChatSrv = chatSrv;
		mContext = context ;
		mHandler = handler ;
	}
	/**
	 * @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");
    	
		//查询短信箱里的内容    	
    	Uri outSMSUri = Uri.parse("content://sms/inbox") ;
    	String[]  projection= new String[] { "_id", "thread_id", "protocol", "read", "status", "type", "date", "address", "subject", "body"};
    	String selection = "_id>"+mChatSrv.mMaxMsgId;
    	Cursor cur = mContext.getContentResolver().query(outSMSUri, 
    			projection,  selection, null, "date desc");
    	if(cur != null){
    		boolean send = false;
        	Log.i(TAG, "the number of send is"+cur.getCount()) ;
        	//循环遍历
        	while(cur.moveToNext()){
        		int read = cur.getInt(cur.getColumnIndex("read"));
        		Log.i(TAG, "id="+cur.getString(cur.getColumnIndex("_id"))+"read="+read);
        		if (0 == cur.getInt(cur.getColumnIndex("read"))){
        			if (!send){
                		send = true;
                		mChatSrv.mMsgList.clear();
        			}
            		addNode(cur);
        		}
        	}
        	cur.close();       
        	if (send){
            	mHandler.sendEmptyMessage(ChatAppConstant.SRV_BackMsg_New_Sms);       	
        	}
    	}
	}
    
    private void addNode(Cursor cur){
		MsgNode node = new MsgNode();
		node.mMsgId = cur.getInt(cur.getColumnIndex("_id"));
		if ( node.mMsgId > mChatSrv.mMaxMsgId) {
			mChatSrv.mMaxMsgId = node.mMsgId;
		}
		else{
			return;
		}
		
		node.mThreadId = cur.getInt(cur.getColumnIndex("thread_id"));
		node.mProtocol = cur.getInt(cur.getColumnIndex("protocol"));
		node.mRead = cur.getInt(cur.getColumnIndex("read"));
		node.mStatus = cur.getInt(cur.getColumnIndex("status"));
		node.mType = cur.getInt(cur.getColumnIndex("type"));
		node.mDate = cur.getLong(cur.getColumnIndex("date"));
		node.mAdress = cur.getString(cur.getColumnIndex("address"));
		node.mBody = cur.getString(cur.getColumnIndex("body"));
		mChatSrv.mMsgList.add(node);
    }
	
}