mvp解析gridview
主界面
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity implements MyView {
private GridView grid;
private MyPresenter mMyPresenter;
ArrayList<User.DataBean> list = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
grid = findViewById(R.id.grid);
mMyPresenter = new MyPresenter(this);
mMyPresenter.login(UrlUtil.GONG);
}
@Override
public void onSuccess(String result) {
Toast.makeText(MainActivity.this,""+result,Toast.LENGTH_SHORT).show();
}
@Override
public void onFailer(String msg) {
}
@Override
public void OnGetData(final List<User.DataBean> data) {
grid.setAdapter(new BaseAdapter() {
@Override
public int getCount() {
return 9;
}
@Override
public Object getItem(int position) {
return data.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if(convertView==null){
convertView=View.inflate(getApplicationContext(),R.layout.item,null);
holder = new ViewHolder();
holder.mTextView = convertView.findViewById(R.id.textView);
convertView.setTag(holder);
}else{
holder = (ViewHolder) convertView.getTag();
}
User.DataBean bean = data.get(position);
holder.mTextView.setText(bean.getAuthor_name());
return convertView;
}
});
}
class ViewHolder{
TextView mTextView;
}
}
user类
获取网址类
public interface UrlUtil {
public String GONG = “http://www.xieast.com/api/news/news.php?page=1”;
}
异步封装网络工具类
import android.os.AsyncTask;
import com.google.common.io.CharStreams;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.List;
public class UrlConnection {
public void login(final String url, final CallBack callBack){
new AsyncTask<String, Void, String>() {
@Override
protected String doInBackground(String… strings) {
try {
URL url1 = new URL(url);
HttpURLConnection urlConnection = (HttpURLConnection) url1.openConnection();
urlConnection.setConnectTimeout(3000);
int responseCode = urlConnection.getResponseCode();
if(responseCode==200){
InputStream inputStream = urlConnection.getInputStream();
InputStreamReader reader = new InputStreamReader(inputStream);
String s = CharStreams.toString(reader);
return s;
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
callBack.getData(s);
}
}.execute();
}
public interface CallBack{
void getData(String s);
void SetData(List<User.DataBean> data);
}
}
view层
成功数据/失败数据/传对象
public interface MyView {
void onSuccess(String result);
void onFailer(String msg);
void OnGetData(List<User.DataBean> data);
}
model层 解析数据
public class MyModel {
public void login(final String url, final UrlConnection.CallBack callBack){
UrlConnection urlConnection = new UrlConnection();
urlConnection.login(url, new UrlConnection.CallBack() {
@Override
public void getData(String s) {
Gson gson = new Gson();
User user = gson.fromJson(s, User.class);
String msg = user.getMsg();
List<User.DataBean> mData = user.getData();
callBack.SetData(mData);
callBack.getData(msg);
}
@Override
public void SetData(List<User.DataBean> data) {
}
});
}
}
presenter层
public class MyPresenter {
private MyView mMyView;
private MyModel mMyModel;
private List<User.DataBean> mdata;
public MyPresenter(MyView myView) {
mMyView = myView;
mMyModel = new MyModel();
}
public void login(String url){
mMyModel.login(url, new UrlConnection.CallBack() {
@Override
public void getData(String s) {
if(s.equals(“成功的返回”)){
mMyView.onSuccess(“成功的返回”);
mMyView.OnGetData(mdata);
}else{
mMyView.onFailer(“返回失败”);
}
}
@Override
public void SetData(List<User.DataBean> data) {
mdata=data;
}
});
}
}