comment utiliser okhttp en éclipse

Question

je veux utiliser la bibliothèque okhttp (fichier jar) en eclipse je ajoute le fichier jar à mon projet et écrire un code simple, mais je reçois erreur suivante lors de l'exécution de mon app.please m'aider ...

public void clicked(View v) throws IOException{ 


     TestMain example = new TestMain(); 
     example.doGetRequest("http://www.vogella.com"); 

} 

public class TestMain { 
    OkHttpClient client = new OkHttpClient(); 
    // code request code here 
    String doGetRequest(String url) throws IOException { 
     Request request = new Request.Builder() 
      .url(url) 
      .build(); 

     Response response = client.newCall(request).execute(); 
     return response.body().string(); 
    } 

}

erreur:

01-15 12:55:58.561: E/dalvikvm(2133): Could not find class 'com.squareup.okhttp.OkHttpClient', referenced from method com.example.http1.MainActivity$TestMain.<init> 
01-15 12:55:58.571: E/dalvikvm(2133): Could not find class 'com.squareup.okhttp.Request$Builder', referenced from method com.example.http1.MainActivity$TestMain.doGetRequest 
01-15 12:55:58.981: E/AndroidRuntime(2133): FATAL EXCEPTION: main 
01-15 12:55:58.981: E/AndroidRuntime(2133): Process: com.example.http1, PID: 2133 
01-15 12:55:58.981: E/AndroidRuntime(2133): java.lang.IllegalStateException: Could not execute method of the activity 
01-15 12:55:58.981: E/AndroidRuntime(2133):  at android.view.View$1.onClick(View.java:3823) 
01-15 12:55:58.981: E/AndroidRuntime(2133):  at android.view.View.performClick(View.java:4438) 
01-15 12:55:58.981: E/AndroidRuntime(2133):  at android.view.View$PerformClick.run(View.java:18422) 
01-15 12:55:58.981: E/AndroidRuntime(2133):  at android.os.Handler.handleCallback(Handler.java:733) 
01-15 12:55:58.981: E/AndroidRuntime(2133):  at android.os.Handler.dispatchMessage(Handler.java:95) 
01-15 12:55:58.981: E/AndroidRuntime(2133):  at android.os.Looper.loop(Looper.java:136) 
01-15 12:55:58.981: E/AndroidRuntime(2133):  at android.app.ActivityThread.main(ActivityThread.java:5017) 
01-15 12:55:58.981: E/AndroidRuntime(2133):  at java.lang.reflect.Method.invokeNative(Native Method) 
01-15 12:55:58.981: E/AndroidRuntime(2133):  at java.lang.reflect.Method.invoke(Method.java:515) 
01-15 12:55:58.981: E/AndroidRuntime(2133):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
01-15 12:55:58.981: E/AndroidRuntime(2133):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
01-15 12:55:58.981: E/AndroidRuntime(2133):  at dalvik.system.NativeStart.main(Native Method) 
01-15 12:55:58.981: E/AndroidRuntime(2133): Caused by: java.lang.reflect.InvocationTargetException 
01-15 12:55:58.981: E/AndroidRuntime(2133):  at java.lang.reflect.Method.invokeNative(Native Method) 
01-15 12:55:58.981: E/AndroidRuntime(2133):  at java.lang.reflect.Method.invoke(Method.java:515) 
01-15 12:55:58.981: E/AndroidRuntime(2133):  at android.view.View$1.onClick(View.java:3818) 
01-15 12:55:58.981: E/AndroidRuntime(2133):  ... 11 more 
01-15 12:55:58.981: E/AndroidRuntime(2133): Caused by: java.lang.NoClassDefFoundError: com.squareup.okhttp.OkHttpClient 
01-15 12:55:58.981: E/AndroidRuntime(2133):  at com.example.http1.MainActivity$TestMain.<init>(MainActivity.java:36) 
01-15 12:55:58.981: E/AndroidRuntime(2133):  at com.example.http1.MainActivity.clicked(MainActivity.java:26) 
01-15 12:55:58.981: E/AndroidRuntime(2133):  ... 14 more 
01-15 13:00:33.731: E/dalvikvm(2302): Could not find class 'com.squareup.okhttp.OkHttpClient', referenced from method com.example.http1.MainActivity$TestMain.<init> 
01-15 13:00:33.801: E/AndroidRuntime(2302): FATAL EXCEPTION: main 
01-15 13:00:33.801: E/AndroidRuntime(2302): Process: com.example.http1, PID: 2302 
01-15 13:00:33.801: E/AndroidRuntime(2302): java.lang.IllegalStateException: Could not execute method of the activity 
01-15 13:00:33.801: E/AndroidRuntime(2302):  at android.view.View$1.onClick(View.java:3823) 
01-15 13:00:33.801: E/AndroidRuntime(2302):  at android.view.View.performClick(View.java:4438) 
01-15 13:00:33.801: E/AndroidRuntime(2302):  at android.view.View$PerformClick.run(View.java:18422) 
01-15 13:00:33.801: E/AndroidRuntime(2302):  at android.os.Handler.handleCallback(Handler.java:733) 
01-15 13:00:33.801: E/AndroidRuntime(2302):  at android.os.Handler.dispatchMessage(Handler.java:95) 
01-15 13:00:33.801: E/AndroidRuntime(2302):  at android.os.Looper.loop(Looper.java:136) 
01-15 13:00:33.801: E/AndroidRuntime(2302):  at android.app.ActivityThread.main(ActivityThread.java:5017) 
01-15 13:00:33.801: E/AndroidRuntime(2302):  at java.lang.reflect.Method.invokeNative(Native Method) 
01-15 13:00:33.801: E/AndroidRuntime(2302):  at java.lang.reflect.Method.invoke(Method.java:515) 
01-15 13:00:33.801: E/AndroidRuntime(2302):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
01-15 13:00:33.801: E/AndroidRuntime(2302):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
01-15 13:00:33.801: E/AndroidRuntime(2302):  at dalvik.system.NativeStart.main(Native Method) 
01-15 13:00:33.801: E/AndroidRuntime(2302): Caused by: java.lang.reflect.InvocationTargetException 
01-15 13:00:33.801: E/AndroidRuntime(2302):  at java.lang.reflect.Method.invokeNative(Native Method) 
01-15 13:00:33.801: E/AndroidRuntime(2302):  at java.lang.reflect.Method.invoke(Method.java:515) 
01-15 13:00:33.801: E/AndroidRuntime(2302):  at android.view.View$1.onClick(View.java:3818) 
01-15 13:00:33.801: E/AndroidRuntime(2302):  ... 11 more 
01-15 13:00:33.801: E/AndroidRuntime(2302): Caused by: java.lang.NoClassDefFoundError: com.squareup.okhttp.OkHttpClient 
01-15 13:00:33.801: E/AndroidRuntime(2302):  at com.example.http1.MainActivity$TestMain.<init>(MainActivity.java:37) 
01-15 13:00:33.801: E/AndroidRuntime(2302):  at com.example.http1.MainActivity.clicked(MainActivity.java:27) 
01-15 13:00:33.801: E/AndroidRuntime(2302):  ... 14 more 
01-15 13:02:09.921: E/dalvikvm(2401): Could not find class 'com.squareup.okhttp.OkHttpClient', referenced from method com.example.http1.MainActivity$TestMain.<init> 
01-15 13:02:10.131: E/AndroidRuntime(2401): FATAL EXCEPTION: main 
01-15 13:02:10.131: E/AndroidRuntime(2401): Process: com.example.http1, PID: 2401 
01-15 13:02:10.131: E/AndroidRuntime(2401): java.lang.NoClassDefFoundError: com.squareup.okhttp.OkHttpClient 
01-15 13:02:10.131: E/AndroidRuntime(2401):  at com.example.http1.MainActivity$TestMain.<init>(MainActivity.java:37) 
01-15 13:02:10.131: E/AndroidRuntime(2401):  at com.example.http1.MainActivity.onCreate(MainActivity.java:21) 
01-15 13:02:10.131: E/AndroidRuntime(2401):  at android.app.Activity.performCreate(Activity.java:5231) 
01-15 13:02:10.131: E/AndroidRuntime(2401):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
01-15 13:02:10.131: E/AndroidRuntime(2401):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159) 
01-15 13:02:10.131: E/AndroidRuntime(2401):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245) 
01-15 13:02:10.131: E/AndroidRuntime(2401):  at android.app.ActivityThread.access$800(ActivityThread.java:135) 
01-15 13:02:10.131: E/AndroidRuntime(2401):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 
01-15 13:02:10.131: E/AndroidRuntime(2401):  at android.os.Handler.dispatchMessage(Handler.java:102) 
01-15 13:02:10.131: E/AndroidRuntime(2401):  at android.os.Looper.loop(Looper.java:136) 
01-15 13:02:10.131: E/AndroidRuntime(2401):  at android.app.ActivityThread.main(ActivityThread.java:5017) 
01-15 13:02:10.131: E/AndroidRuntime(2401):  at java.lang.reflect.Method.invokeNative(Native Method) 
01-15 13:02:10.131: E/AndroidRuntime(2401):  at java.lang.reflect.Method.invoke(Method.java:515) 
01-15 13:02:10.131: E/AndroidRuntime(2401):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
01-15 13:02:10.131: E/AndroidRuntime(2401):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
01-15 13:02:10.131: E/AndroidRuntime(2401):  at dalvik.system.NativeStart.main(Native Method) 

Answer 1

Passer à Android studio App Android développement.

Eclipse n'est plus supporté. Avec Android Studio, vous pouvez ajouter la ligne suivante à votre fichier build.gradle pour ajouter facilement OkHttp sans avoir à traiter manuellement les fichiers JAR.

compile 'com.squareup.okhttp3:okhttp:3.5.0'