2019独角兽企业重金招聘Python工程师标准>>> 
Fragment中
public class VideoOneFragment extends Fragment implements View.OnClickListener {
private View view;
private Button mBut1;
private Button mBut2;
private Button mBut3;
//接口
CallBackValue callBackValue;
/**
* fragment与activity产生关联是 回调这个方法
*/
@Override
public void onAttach(Context context) {
// TODO Auto-generated method stub
super.onAttach(context );
//当前fragment从activity重写了回调接口 得到接口的实例化对象
callBackValue =(CallBackValue) getActivity();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View inflate = inflater.inflate(R.layout.fragment_video_one, container, false);
initView(inflate);
return inflate;
}
private void initView(View inflate) {
mBut1 = (Button) inflate.findViewById(R.id.but1);
mBut1.setOnClickListener(this);
mBut2 = (Button) inflate.findViewById(R.id.but2);
mBut2.setOnClickListener(this);
mBut3 = (Button) inflate.findViewById(R.id.but3);
mBut3.setOnClickListener(this);
callBackValue.SendMessageValue("0");
}
@Override
public void onClick(View v) {
switch (v.getId()) {
default:
break;
case R.id.but1:
callBackValue.SendMessageValue("1");
break;
case R.id.but2:
callBackValue.SendMessageValue("2");
break;
case R.id.but3:
callBackValue.SendMessageValue("3");
break;
}
}
//定义一个回调接口
public interface CallBackValue{
public void SendMessageValue(String strValue);
}
}
Activity中
@Override
public void SendMessageValue(String strValue) {
tv.setText(strValue);
}