Java 在android中使用改型库生成异步请求
我拥有的内容::我有一个简单的异步任务,它使用Http获取JSON 我试图学习的内容::如何将其转换为使用Java 在android中使用改型库生成异步请求,java,android,retrofit,Java,Android,Retrofit,我拥有的内容::我有一个简单的异步任务,它使用Http获取JSON 我试图学习的内容::如何将其转换为使用改装库的项目 我在下面提到了这门课 SplashActivity.java public class SplashActivity extends Activity { /** Called when the activity is first created. */ JSONObject jsonobject; JSONArray jsonarray;
改装
库的项目
我在下面提到了这门课
SplashActivity.java
public class SplashActivity extends Activity {
/** Called when the activity is first created. */
JSONObject jsonobject;
JSONArray jsonarray;
ArrayList<HashMap<String, String>> arraylist;
private String Content;
DatabaseHandler db;
//TextView txtSplashTitle,txtSplashDesc;
@InjectView(R.id.txtSplashDesc) TextView txtSplashDesc=null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.inject(this);//using ButterKnife library for viewInjection
String serverURL = "";
db = new DatabaseHandler(this);
new LongOperation().execute(serverURL);
freeMemory();
}
@Override
protected void onStart() {
// TODO Auto-generated method stub
super.onStart();
//Setting fonts for textviews
setCustomFontForTextViews();
}
private void setCustomFontForTextViews() {
Typeface typeFace = Typeface.createFromAsset(getAssets(), "royalacid.ttf");
txtSplashDesc.setTypeface(typeFace);
}
// Class with extends AsyncTask class
private class LongOperation extends AsyncTask<String, Void, Void> {
private final HttpClient Client = new DefaultHttpClient();
private String Error = null;
private ProgressDialog Dialog = new ProgressDialog(SplashActivity.this);
protected void onPreExecute() {
// NOTE: You can call UI Element here.
Dialog.setMessage("Downloading source..");
Dialog.show();
}
// Call after onPreExecute method
protected Void doInBackground(String... urls) {
try {
// NOTE: Don't call UI Element here.
HttpGet httpget = new HttpGet("http://10.0.2.2:3009/findmybuffet/?storedproc=get_app_tables&flag=sudhakar");
ResponseHandler<String> responseHandler = new BasicResponseHandler();
Content = Client.execute(httpget, responseHandler);
jsonobject = new JSONObject(Content);
jsonobject = jsonobject.getJSONObject("findmybuffet");
jsonarray = jsonobject.getJSONArray("buffets");
for (int i = 0; i < jsonarray.length(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
jsonobject = jsonarray.getJSONObject(i);
// Retrive JSON Objects
map.put("buf_off_id", jsonobject.getString("buf_off_id"));
map.put("from_time", jsonobject.getString("from_time"));
map.put("to_time", jsonobject.getString("to_time"));
map.put("online_price", jsonobject.getString("online_price"));
map.put("reserved_price", jsonobject.getString("reserved_price"));
map.put("buf_image", jsonobject.getString("buf_image"));
map.put("res_name", jsonobject.getString("res_name"));
map.put("rating", jsonobject.getString("rating"));
map.put("latitude", jsonobject.getString("latitude"));
map.put("longitude", jsonobject.getString("longitude"));
map.put("buf_type_name", jsonobject.getString("buf_type_name"));
map.put("from_date", jsonobject.getString("from_date"));
map.put("to_date", jsonobject.getString("to_date"));
map.put("city_id", jsonobject.getString("city_id"));
map.put("city_name", jsonobject.getString("city_name"));
map.put("meal_type_id", jsonobject.getString("meal_type_id"));
map.put("meal_type_name", jsonobject.getString("meal_type_name"));
map.put("buf_desc", jsonobject.getString("buf_desc"));
map.put("distance", jsonobject.getString("distance"));
Log.d("----$$$----", map.toString());
//Calling database
db.addContact(map);
//findCityName();
//String result=getAddress(12.918286,77.669493);
// Log.d("----result$$$$$-----", result);
}
} catch (IOException|JSONException e) {
Error = e.getMessage();
cancel(true);
}
return null;
}
private String getAddress(double latitude, double longitude) {
StringBuilder result = new StringBuilder();
try {
Geocoder geocoder = new Geocoder(SplashActivity.this, Locale.getDefault());
List<Address> addresses = geocoder.getFromLocation(latitude, longitude, 1);
if (addresses.size() > 0) {
Address address = addresses.get(0);
result.append(address.getLocality()).append("\n");
result.append(address.getCountryName());
}
} catch (IOException e) {
Log.e("tag", e.getMessage());
}
return result.toString();
}
/*private void findCityName() {
// TODO Auto-generated method stub
Geocoder geocoder = new Geocoder(this, Locale.getDefault());
List<Address> addresses = geocoder.getFromLocation(lat, lng, 1);
}
*/
protected void onPostExecute(Void unused) {
// Close progress dialog
Dialog.dismiss();
}
}
private void freeMemory() {
jsonobject=null;
jsonarray=null;
arraylist=null;
Content=null;
}
}
公共类SplashActivity扩展活动{
/**在首次创建活动时调用*/
JSONObject JSONObject;
JSONArray JSONArray;
ArrayList ArrayList;
私有字符串内容;
数据库处理程序数据库;
//text查看txtSplashTitle,txtSplashDesc;
@InjectView(R.id.txtSplashDesc)TextView txtSplashDesc=null;
@凌驾
创建时的公共void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.injection(this);//使用ButterKnife库进行视图注入
字符串serverURL=“”;
db=新的DatabaseHandler(此);
新建LongOperation().execute(服务器URL);
freemory();
}
@凌驾
受保护的void onStart(){
//TODO自动生成的方法存根
super.onStart();
//设置文本视图的字体
setCustomFontForTextViews();
}
私有void setCustomFontForTextViews(){
Typeface-Typeface=Typeface.createFromAsset(getAssets(),“royalacid.ttf”);
txtSplashDesc.setTypeface(字体);
}
//使用扩展的AsyncTask类初始化
私有类LongOperation扩展了异步任务{
私有最终HttpClient客户端=新的DefaultHttpClient();
私有字符串错误=null;
private ProgressDialog=新建ProgressDialog(SplashActivity.this);
受保护的void onPreExecute(){
//注意:您可以在这里调用UI元素。
setMessage(“下载源…”);
Dialog.show();
}
//在onPreExecute方法之后调用
受保护的Void doInBackground(字符串…URL){
试一试{
//注意:这里不要调用UI元素。
HttpGet HttpGet=新的HttpGet(“http://10.0.2.2:3009/findmybuffet/?storedproc=get_app_tables&flag=sudhakar");
ResponseHandler ResponseHandler=新BasicResponseHandler();
Content=Client.execute(httpget、responseHandler);
jsonobject=新的jsonobject(内容);
jsonobject=jsonobject.getJSONObject(“findmybuffet”);
jsonarray=jsonobject.getJSONArray(“自助餐”);
for(int i=0;i0){
地址=地址。获取(0);
result.append(address.getLocality()).append(“\n”);
append(address.getCountryName());
}
}捕获(IOE异常){
Log.e(“tag”,e.getMessage());
}
返回result.toString();
}
/*私有void findCityName(){
//TODO自动生成的方法存根
Geocoder Geocoder=新的Geocoder(这个,Locale.getDefault());
列表地址=地理编码器。getFromLocation(lat,lng,1);
}
*/
受保护的void onPostExecute(void unused){
//关闭进度对话框
Dialog.dismise();
}
}
私有void freemory(){
jsonobject=null;
jsonarray=null;
arraylist=null;
内容=空
@GET("/findmybuffet/?storedproc=get_app_tables&flag={name}")
void findBuffet(@Path("name") String name, Callback cb);
RestAdapter restAdapter = new RestAdapter.Builder()
.setServer("http://10.0.2.2:3009")
.build();
ClientInterface service = restAdapter.create(ClientInterface.class);
Callback callback = new Callback() {
@Override
public void success(Object o, Response response) {
// Read response here
}
@Override
public void failure(RetrofitError retrofitError) {
// Catch error here
} };
service.findBuffet("sudhakar", callback);