xutils框架的httputils怎麼實現每隔5秒請求一次服務器？
代碼如下每隔5秒執行一次getdataFromNet不出錯如何實現
public class MainActivity extends Activity {
private Thread thread;
private MapView mapView;
private AMap aMap;
private LocationManagerProxy locationManagerProxy;
private ImageView iv_maptag;
private EditText et_search;
private ImageView iv_user;
private ImageView iv_setmenu;
private ImageView iv_location;
private Marker marker;
private OnLocationChangedListener mListener;
private MarkerOptions markerOptions;
private ArrayList<Aircraft> aircraftList;
private MarkerOptions markerOptionslist;
private ArrayList<Marker> listmarker;
private ArrayList<MarkerOptions> list = new ArrayList<MarkerOptions>();
private String line = null;
private Handler mHandler = new Handler();
private boolean ThreadFlag = true;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
initView();
mapView.onCreate(savedInstanceState);
setUpMap();
initData();
}
private Handler handler = new Handler() {
@Override
public void handleMessage(android.os.Message msg) {
switch (msg.what) {
case 1:
// list=new ArrayList<MarkerOptions>();
aircraftList = (ArrayList<Aircraft>) msg.obj;
if (aircraftList != null) {
for (int i = 0; i < aircraftList.size(); i++) {
Double latitedu = Double.parseDouble(aircraftList
.get(i).Latitude);
Double longitedu = Double.parseDouble(aircraftList
.get(i).Longitude);
markerOptionslist = new MarkerOptions();
markerOptionslist.position(new LatLng(latitedu,
longitedu));
// Toast.makeText(getApplicationContext(),
// markerOptionslist+"", Toast.LENGTH_LONG).show();
markerOptionslist.perspective(true);// 設置marker的近大遠小效果
markerOptionslist
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.civil_aircraft_selected));
markerOptionslist.draggable(true);
markerOptionslist.setFlat(true);
markerOptionslist.period(50);// 定位marker圖標在中間顯示
list.add(markerOptionslist);
}
listmarker = aMap.addMarkers(list, false);
}
break;
default:
break;
}
}
};
private void initData() {
getDataFromNet();// 每隔五秒執行一次此方法不報錯
// requestFlyAirplane();//第一種實現報錯，異常為java.lang.RuntimeException//Can't create handler inside thread that has not called Looper.prepare()
// new Thread(networkTask1).start();//第二種一樣報錯
}
private void initView() {
mapView = (MapView) findViewById(R.id.main_mapview1);
iv_location = (ImageView) findViewById(R.id.iv_location);
iv_setmenu = (ImageView) findViewById(R.id.iv_setmenu);
}
@Override
protected void onResume() {
super.onResume();
mapView.onResume();
}
@Override
protected void onPause() {
super.onPause();
mapView.onPause();
}
@Override
protected void onDestroy() {
super.onDestroy();
mapView.onDestroy();
}
private void setUpMap() {
if (aMap == null) {
aMap = mapView.getMap();
}
aMap.setMapType(AMap.MAP_TYPE_NORMAL);
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mapView.onSaveInstanceState(outState);
}
// private void requestFlyAirplane(){
// thread=new Thread(new Runnable() {
// @Override
// public void run() {
// while(ThreadFlag){
// try {
// aircraftList1=getDataFromNet();
// Message message=handler.obtainMessage();
// message.obj=aircraftList;
// message.what=1;
// handler.sendMessage(message);
// // getDataFromNet();
// // Thread.sleep(5000);
// } catch (Exception e) {
// e.printStackTrace();
// }
// }
// }
// });
// thread.start();
// }
Runnable networkTask1 = new Runnable() {
@Override
public void run() {
// TODO
while (ThreadFlag) {
try {
aircraftList = getDataFromNet();
Message message = handler.obtainMessage();
message.obj = aircraftList;
message.what = 1;
handler.sendMessage(message);
// getDataFromNet();
// Thread.sleep(5000);
} catch (Exception e) {
e.printStackTrace();
}
}
}
};
ArrayList<Aircraft> aircraftList1 = new ArrayList<AircraftInfo.Aircraft>();
private ArrayList<Aircraft> getDataFromNet() {
HttpUtils httpUtils = new HttpUtils();
String url = "http://124.207.158.74:60023/aircraft/baidu";
RequestParams params = new RequestParams();
params.setHeader("Content-Type", "application/json; encoding=utf-8");
params.setHeader("Accept", "application/json");
params.setHeader("Username", "haifeng");
params.setHeader("appkey", "fff2dd6003243e46a4aefab71d4366f0c3ebfb12");
params.setHeader("system", "1");
params.setHeader("logindevice",
Secure.getString(getContentResolver(), Secure.ANDROID_ID));
httpUtils.send(HttpMethod.GET, url, params,
new RequestCallBack<String>() {
// 請求成功
@Override
public void onSuccess(ResponseInfo<String> responseInfo) {
String result = responseInfo.result;
// Toast.makeText(getApplicationContext(),
// "請求成功"+result, Toast.LENGTH_SHORT).show();
// processData(result);
Gson gson = new Gson();
AircraftInfo aircrafts = gson.fromJson(result,
AircraftInfo.class);
aircraftList1 = aircrafts.AircraftInfos;
Message message = handler.obtainMessage();
message.obj = aircraftList;
message.what = 1;
handler.sendMessage(message);
}
// 請求失敗
@Override
public void onFailure(HttpException error, String msg) {
Toast.makeText(getApplicationContext(), "網絡錯誤",
Toast.LENGTH_SHORT).show();
error.printStackTrace();
}
});
try {
// httpUtils.wait(5000);
// httpUtils.notifyAll();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return aircraftList1;
}
}
你看看這個，希望對你有幫助http://www.tuicool.com/articles/nMFb2q
