Cannot resolve symbol HttpGet,HttpClient,HttpResponce in Android Studio

Question

I just copy all the jar files of Http but Android Studio cann't import all these jar files.It gives an error : Cannot resolve symbol HttpGet,HttpClient,HttpResponse.

My Activity file is here:-

public class MainActivity extends AppCompatActivity {  ArrayList<Product>  productslist; ProductAdapter adapter; @Override protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.activity_main);       productslist = new ArrayList<Product>();     new JSONAsyncTask().execute("http://opencart.codeniques.com/myshop/?route=feed/web_api/products&id=60&key=test123");      ListView listView = (ListView)findViewById(R.id.list);     adapter = new ProductAdapter(getApplicationContext(),R.layout.row,productslist);      listView.setAdapter(adapter);      listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {         @Override         public void onItemClick(AdapterView<?> parent, View view, int position, long id) {             Toast.makeText(getApplicationContext(),productslist.get(position).getName(),Toast.LENGTH_LONG).show();         }     }); }  class JSONAsyncTask extends AsyncTask<String,Void,Boolean>{      ProgressDialog dialog;      @Override     protected void onPreExecute() {         super.onPreExecute();         dialog = new ProgressDialog(MainActivity.this);         dialog.setMessage("Loading, please wait");         dialog.setTitle("Connecting server");         dialog.show();         dialog.setCancelable(false);     }      @Override     protected Boolean doInBackground(String... params) {         try{             HttpGet httppost = new HttpGet(params[0]);             HttpClient httpclient = new DefaultHttpClient();             HttpResponse response = httpclient.execute(httppost);              int status = response.getStatusLine().getStatusCode();              if(status == 200){                 HttpEntity entity = response.getEntity();                 String data = EntityUtils.toString(entity);                  JSONObject jsono = new JSONObject(data);                 JSONArray jarray = jsono.getJSONArray("products");                  for (int i = 0; i < jarray.length(); i++) {                     JSONObject object = jarray.getJSONObject(i);                      Product actor = new Product();                      actor.setId(object.getString("id"));                     actor.setName(object.getString("name"));                     actor.setDescription(object.getString("description"));                     actor.setHref(object.getString("href"));                     actor.setPrice(object.getString("pirce"));                     actor.setImage(object.getString("thumb"));                     actor.setSpecial(object.getString("special"));                     actor.setRating(object.getString("rating"));                      productslist.add(actor);             }                 return  true;             }         }catch (JSONException e){             Log.e("Error :",e.getMessage());         }catch (ParseException e){             Log.e("Error :",e.getMessage());         }catch (IOException e){             Log.e("Error :",e.getMessage());         }catch (Exception e){             Log.e("Error :",e.getMessage());         }         return  false;     }     @Override     protected void onPostExecute(Boolean aBoolean) {         dialog.cancel();         adapter.notifyDataSetChanged();         if(aBoolean == false){             Toast.makeText(getApplicationContext(), "Unable to fetch data from server", Toast.LENGTH_LONG).show();         }     } }} 

and here my gradle is here:-

apply plugin: 'com.android.application' android { compileSdkVersion 23 buildToolsVersion "22.0.1"  defaultConfig {     applicationId "android.catalyst.com.newjsonarray"     minSdkVersion 16     targetSdkVersion 23     versionCode 1     versionName "1.0" } buildTypes {     release {         minifyEnabled false         proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'     }}} dependencies { compile fileTree(dir: 'libs', include: ['*.jar'])  testCompile 'junit:junit:4.12' compile 'com.android.support:appcompat-v7:23.0.1' compile 'com.android.support:design:23.0.1'} 

Answer 1

Just add this in your dependencies

compile 'org.apache.httpcomponents:httpcore:4.4.1' compile 'org.apache.httpcomponents:httpclient:4.5' 

Finally

dependencies { compile fileTree(dir: 'libs', include: ['*.jar'])     testCompile 'junit:junit:4.12' compile 'com.android.support:appcompat-v7:23.0.1' compile 'com.android.support:design:23.0.1' compile 'org.apache.httpcomponents:httpcore:4.4.1' compile 'org.apache.httpcomponents:httpclient:4.5' } 

And also add this code:

 android {     useLibrary 'org.apache.http.legacy'          } 

FYI

Specify requirement for Apache HTTP Legacy library If your app is targeting API level 28 (Android 9.0) or above, you must include the following declaration within the element of AndroidManifest.xml.

 <uses-library       android:name="org.apache.http.legacy"       android:required="false" /> 

Answer 2

HttpClient is not supported any more in sdk 23. You have to use URLConnection or downgrade to sdk 22 (compile 'com.android.support:appcompat-v7:22.2.0')

If you need sdk 23, add this to your gradle:

In dependencies add:

compile 'org.apache.httpcomponents:httpcore:4.4.1' compile 'org.apache.httpcomponents:httpclient:4.5' 

and also add this

android {     useLibrary 'org.apache.http.legacy' }