------为项目创建服务处理程序类--------
public class ServiceHandler {
static String response = null;
public final static int GET = 1;
public final static int POST = 2;
public ServiceHandler() {
}
/*
* Making service call
* @url - url to make request
* @method - http request method
* */
public String makeServiceCall(String url, int method) {
return this.makeServiceCall(url, method, null);
}
/*
* Making service call
* @url - url to make request
* @method - http request method
* @params - http request params
* */
public String makeServiceCall(String url, int method,
List<NameValuePair> params) {
try {
// http client
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpEntity httpEntity = null;
HttpResponse httpResponse = null;
// Checking http request method type
if (method == POST) {
Log.e("in POST","in POST");
HttpPost httpPost = new HttpPost(url);
// adding post params
if (params != null) {
Log.e("in POST params","in POST params");
httpPost.setEntity(new UrlEncodedFormEntity(params));
}
Log.e("url in post service",url);
httpResponse = httpClient.execute(httpPost);
} else if (method == GET) {
// appending params to url
Log.e("in GET","in GET");
if (params != null) {
Log.e("in GET params","in GET params");
String paramString = URLEncodedUtils
.format(params, "utf-8");
url += "?" + paramString;
}
Log.e("url in get service",url);
HttpGet httpGet = new HttpGet(url);
httpResponse = httpClient.execute(httpGet);
}
httpEntity = httpResponse.getEntity();
response = EntityUtils.toString(httpEntity);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return response;
}
public String makeServiceCallIMAGE(String url, int method,
List<NameValuePair> params) {
try {
// http client
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpEntity httpEntity = null;
HttpResponse httpResponse = null;
// Checking http request method type
if (method == POST) {
HttpPost httpPost = new HttpPost(url);
// adding post params
if (params != null) {
httpPost.setEntity(new UrlEncodedFormEntity(params));
}
httpResponse = httpClient.execute(httpPost);
} else if (method == GET) {
// appending params to url
if (params != null) {
String paramString = URLEncodedUtils
.format(params, "utf-8");
url += "?" + paramString;
}
HttpGet httpGet = new HttpGet(url);
httpResponse = httpClient.execute(httpGet);
}
httpEntity = httpResponse.getEntity();
response = EntityUtils.toString(httpEntity);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return response;
}
}
--------------用于登录的异步任务------------------
public class Login_Activity extends ActionBarActivity {
//Internet Service
NetworkConnection nw;
ProgressDialog prgDialog;
Boolean netConnection = false;
//
//Login API
String loginURL ="url";
//
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
nw = new NetworkConnection(getApplicationContext());
prgDialog = new ProgressDialog(this);
// Set Cancelable as False
prgDialog.setCancelable(false);
new LoginOperation().execute();
}
private class LoginOperation extends AsyncTask<String, Void, Void> {
String status, message;
@Override
protected void onPreExecute() {
// Set Progress Dialog Text
prgDialog.setMessage("Logging...");
prgDialog.show();
}
@Override
protected Void doInBackground(String... urls) {
if(nw.isConnectingToInternet() == true)
{
try
{
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("method", "ClientesLogin"));
nameValuePairs.add(new BasicNameValuePair("Email", str_Email));
nameValuePairs.add(new BasicNameValuePair("Senha", str_Password));
ServiceHandler sh = new ServiceHandler();
String response = sh.makeServiceCall(loginURL, ServiceHandler.GET,
nameValuePairs);
Log.e("response", response);
JSONObject js = new JSONObject(response);
status = js.getString("status");
Log.e("status",status);
if(status.contains("Fail"))
{
message = js.getString("message");
}
/*else
{
JSONObject jslogin=js.getJSONObject("user_list");
for (int i = 0; i < jslogin.length(); i++) {
}
}*/
}catch(Exception ex){
}
netConnection = true;
}else
{
netConnection = false;
}
return null;
}
@Override
protected void onPostExecute(Void result) {
prgDialog.dismiss();
if(netConnection == false)
{
Toast toast = Toast.makeText(getApplicationContext(),"Internet is not available. Please turn on and try again.", Toast.LENGTH_LONG);
toast.setGravity(Gravity.CENTER, 0, 0);
toast.show();
}
else
{
if(status.contains("Success"))
{
Toast toast = Toast.makeText(getApplicationContext(), "Login Successful", Toast.LENGTH_SHORT);
toast.setGravity(Gravity.CENTER, 0, 0);
toast.show();
Intent i=new Intent(Login_Activity.this,home_page_activity.class);
startActivity(i);
}
else{
Toast toast = Toast.makeText(getApplicationContext(), message, Toast.LENGTH_SHORT);
toast.setGravity(Gravity.CENTER, 0, 0);
toast.show();
}
}
super.onPostExecute(result);
}
}
}
---------------网络连接类---------------------
public class NetworkConnection {
Context context;
public NetworkConnection(Context context){
this.context = context;
}
public boolean isConnectingToInternet(){
ConnectivityManager connectivity = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivity != null)
{
NetworkInfo[] info = connectivity.getAllNetworkInfo();
if (info != null)
for (int i = 0; i < info.length; i++)
if (info[i].getState() == NetworkInfo.State.CONNECTED)
{
return true;
}
}
return false;
}
}
JSONArray main1 = js.getJSONArray("Test 1");
for (int i = 0; i < main1.length(); i++) {
JSONObject jsonObject = main1.getJSONObject(i);
