InternalApi.java

package jp.co.cyberagent.stf.util;

import android.os.IBinder;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class InternalApi {
    public static boolean hasService(String name) {
        try {
            // The ServiceManager class is @hidden in newer SDKs
            Class<?> ServiceManager = Class.forName("android.os.ServiceManager");
            Method getService = ServiceManager.getMethod("getService", String.class);
            return getService.invoke(null, name) != null;
        }
        catch (ClassNotFoundException e) {
            return false;
        }
        catch (NoSuchMethodException e) {
            return false;
        }
        catch (IllegalAccessException e) {
            return false;
        }
        catch (InvocationTargetException e) {
            return false;
        }
    }

    public static Object getServiceBinder(String name) {
        try {
            // The ServiceManager class is @hidden in newer SDKs
            Class<?> ServiceManager = Class.forName("android.os.ServiceManager");
            Method getService = ServiceManager.getMethod("getService", String.class);
            return getService.invoke(null, name);
        }
        catch (ClassNotFoundException e) {
            e.printStackTrace();
            return null;
        }
        catch (NoSuchMethodException e) {
            e.printStackTrace();
            return null;
        }
        catch (IllegalAccessException e) {
            e.printStackTrace();
            return null;
        }
        catch (InvocationTargetException e) {
            e.printStackTrace();
            return null;
        }
    }

    public static Object getServiceAsInterface(String serviceName, String interfaceClass) {
        try {
            Object serviceBinder = getServiceBinder(serviceName);

            Class<?> Stub = Class.forName(interfaceClass);

            //  *.Stub.asInterface(IBinder obj)
            Method asInterface = Stub.getMethod("asInterface", IBinder.class);

            return asInterface.invoke(null, serviceBinder);
        }
        catch (ClassNotFoundException e) {
            throw new UnsupportedOperationException("Unsupported service " + serviceName + ": " + e.getMessage());
        }
        catch (NoSuchMethodException e) {
            throw new UnsupportedOperationException("Unsupported service " + serviceName + ": " + e.getMessage());
        }
        catch (IllegalAccessException e) {
            throw new UnsupportedOperationException("Unsupported service " + serviceName + ": " + e.getMessage());
        }
        catch (InvocationTargetException e) {
            throw new UnsupportedOperationException("Unsupported service " + serviceName + ": " + e.getMessage());
        }
    }

    public static Object getSingleton(String className) {
        try {
            Class<?> aClass = Class.forName(className);

            // getInstance() is @hidden
            Method getInstance = aClass.getMethod("getInstance");

            return getInstance.invoke(null);
        }
        catch (ClassNotFoundException e) {
            throw new UnsupportedOperationException("Unsupported singleton " + className + ": " + e.getMessage());
        }
        catch (NoSuchMethodException e) {
            throw new UnsupportedOperationException("Unsupported singleton " + className + ": " + e.getMessage());
        }
        catch (IllegalAccessException e) {
            throw new UnsupportedOperationException("Unsupported singleton " + className + ": " + e.getMessage());
        }
        catch (InvocationTargetException e) {
            throw new UnsupportedOperationException("Unsupported singleton " + className + ": " + e.getMessage());
        }
    }
}