Android 使用 ContentObserver 监听数据库变化
2010-03-25 17:10:00 来源:WEB开发网}
}
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);
}
}
Tags:Android 使用 ContentObserver
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