public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//[1]注册一个内容观察者
Uri uri = Uri.parse("content://sms/");
getContentResolver().registerContentObserver(uri, true, new MyContentObserver(new Handler()));
}
private class MyContentObserver extends ContentObserver{
public MyContentObserver(Handler handler) {
super(handler);
}
//当观察的内容发生改变的时候调用
@Override
public void onChange(boolean selfChange) {
System.out.println("哈哈哈 短信的数据库发生了改变");
super.onChange(selfChange);
}
}
}