Volley请求

public class MainActivity extends AppCompatActivity {

int startNum=0;

private XListView xlv;

private JSONArray jsonArray;

private MyAdapter adapter;

private CheckBox checkBox;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

xlv = (XListView) findViewById(R.id.xlv);

checkBox = (CheckBox) findViewById(R.id.check);

setxlvdata();

getDate();

}

private void setxlvdata() {

xlv.setPullRefreshEnable(true);

xlv.setPullLoadEnable(true);

xlv.setXListViewListener(new XListView.IXListViewListener() {

@Override

public void onRefresh() {

checkBox.setChecked(false);

startNum=0;

getDate();

xlv.postDelayed(new Runnable() {

@Override

public void run() {

xlv.stopRefresh();

}

},2000);

}

@Override

public void onLoadMore() {

xlv.postDelayed(new Runnable() {

@Override

public void run() {

checkBox.setChecked(false);

startNum++;

getDate();

xlv.stopLoadMore();

}

},2000);

}

});

getDate();

}

private void getDate() {

String url = "http://www.93.gov.cn/93app/data.do?" + "channelId=" + 0 + "&startNum=" + startNum;

//设置请求队列

Log.d("sssssssssssssssssssss",url);

RequestQueue queue= Volley.newRequestQueue(this);

StringRequest request=new StringRequest(url, new Response.Listener<String>() {

@Override

public void onResponse(String s) {

try {

JSONObject jsonobject=new JSONObject(s);

JSONArray data=jsonobject.getJSONArray("data");

if(startNum==0){

jsonArray = new JSONArray();

}

//把数据添加到jsonArray中去

for (int i = 0; i < data.length(); i++) {

jsonArray.put(data.get(i));

}

initListView(jsonArray);

} catch (JSONException e) {

e.printStackTrace();

}

}

}, new Response.ErrorListener() {

@Override

public void onErrorResponse(VolleyError volleyError) {

}

});

//把请求方式添加到队列

queue.add(request);

}

private void initListView(JSONArray jsonArray) {

if(adapter==null){

adapter = new MyAdapter(this, jsonArray, new MyAdapter.OnCheckLitener() {

@Override

public void onCheck(Boolean check) {

checkBox.setChecked(check);

}

});

adapter.setData(jsonArray);

xlv.setAdapter(adapter);

}else{

adapter.setData(jsonArray);

}

}

public void oncheck(View view){

switch (view.getId()){

case R.id.check:

boolean falg=((CheckBox)view).isChecked();

if(falg){

adapter.niticheck(falg);

}else{

adapter.niticheck(falg);

}

break;

}

}

}