Android使用ContentObserver监听数据库变化


最近有个朋友问了我如何接受指定号码的短信，并且不让系统截取到通知用户。真好前端时间看天朝group，也有个朋友问了这个问题，而且通过 ContentObserver方式解决了。我这里就把我实现的代码贴出来，以便需要的朋友参考，最近Google-groups上不去，很是郁闷啊。
Java 代码
public class ScreenTest extends Activity {
class SmsContent extends ContentObserver{
private Cursor cursor = null;
public SmsContent(Handler handler) {
super(handler);
}


/**
* @Description 当短信表发送改变时，调用该方法
* 需要两种权限
* Android.permission.READ_SMS 读取短信
* android.permission.WRITE_SMS 写短信
* @Author Snake
* @Date 2010-1-12
*/
@Override
public void onChange(boolean selfChange) {
// TODO Auto-generated method stub
super.onChange(selfChange);
//读取收件箱中指定号码的短信
cursor = managedQuery(Uri.parse("content://sms/inbox"), new String[]{"_id", "address", "read"}, " address=? and read=?", new String[]{"12345678901", "0"}, "date desc");
if (cursor != null){
ContentValues values = new ContentValues();
values.put("read", "1"); //修改短信为已读模式
cursor.moveToFirst();
while (cursor.isLast()){
//更新当前未读短信状态为已读
getContentResolver().update(Uri.parse("content://sms/inbox"), values, " _id=?", new String[]{""+cursor.getInt(0)});
cursor.moveToNext();
}
}
}
}


/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
SmsContent content = new SmsContent(new Handler());
//注册短信变化监听
this.getContentResolver().registerContentObserver(Uri.parse("content://sms/"), true, content);
}
}


public class ScreenTest extends Activity {
class SmsContent extends ContentObserver{
private Cursor cursor = null;
public SmsContent(Handler handler) {
super(handler);
}


/**
* @Description 当短信表发送改变时，调用该方法
* 需要两种权限
* android.permission.READ_SMS读取短信
* android.permission.WRITE_SMS写短信
* @Author Snake
* @Date 2010-1-12
*/
@Override
public void onChange(boolean selfChange) {
// TODO Auto-generated method stub
super.onChange(selfChange);
//读取收件箱中指定号码的短信
cursor = managedQuery(Uri.parse("content://sms/inbox"), new String[]{"_id", "address", "read"}, " address=? and read=?", new String[]{"12345678901", "0"}, "date desc");
if (cursor != null){
ContentValues values = new ContentValues();
values.put("read", "1"); //修改短信为已读模式
cursor.moveToFirst();
while (cursor.isLast()){
//更新当前未读短信状态为已读
getContentResolver().update(Uri.parse("content://sms/inbox"), values, " _id=?", new String[]{""+cursor.getInt(0)});
cursor.moveToNext();
}
}
}
}


/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
SmsContent content = new SmsContent(new Handler());
//注册短信变化监听
this.getContentResolver().registerContentObserver(Uri.parse("content://sms/"), true, content);
}
}

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