Android Volley错误

Question

运行程序时突然出现Android凌空错误。在这里我粘贴了AppController类来处理凌空对象。

AppController.java

public class AppController extends Application {
public static final String TAG = AppController.class.getSimpleName();

private RequestQueue mRequestQueue;

private static AppController mInstance;

@Override
public void onCreate() {
    super.onCreate();
    mInstance = this;
}

public static synchronized AppController getInstance() {
    return mInstance;
}

public RequestQueue getRequestQueue() {
    if (mRequestQueue == null) {
        mRequestQueue = Volley.newRequestQueue(getApplicationContext());
    }
    return mRequestQueue;
}

public <T> void addToRequestQueue(Request<T> req, String tag) {
    req.setTag(TextUtils.isEmpty(tag) ? TAG : tag);
    getRequestQueue().add(req);
}

public <T> void addToRequestQueue(Request<T> req) {
    req.setTag(TAG);
    getRequestQueue().add(req);
}

public void cancelPendingRequests(Object tag) {
    if (mRequestQueue != null) {
        mRequestQueue.cancelAll(tag);
    }
}
}

我在程序的另一个类中调用此类

AppController.getInstance（）。addToRequestQueue（strReq，tag_string_req）;

它会在这么多天内执行而没有任何错误，但是现在它显示错误

错误：

java.lang.NoSuchMethodError: No virtual method setTag(Ljava/lang/Object;)Lcom/android/volley/Request; in class Lcom/android/volley/Request or its super classes (declaration of 'com.android.volley.Request'; appears in /data/app/com.example.rninja4.rookie-1/split_lib_dependencies_apk.apk:classes6.dex)
                                                                          at com.example.packagename.App.AppController.addToRequestQueue(AppController.java:39)

Answer 1

您尚未在清单中声明应用程序类，如下所示。

<application
    android:name="AppController"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name" >