Android Open Source - playnomics-android Window Callback Proxy

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License

The source code is released under:

Apache License

Java Source Code

package com.playnomics.android.session;
/*  w w  w .j a v  a 2 s. com*/
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;

import com.playnomics.android.util.Logger;
import com.playnomics.android.util.Logger.LogLevel;

import android.view.MotionEvent;
import android.view.Window;

/**
 * @author jaredjenkins Uses a dynamic proxy to safely intercept the UI events
 *         for an Activity's Window Callback.
 */
public class WindowCallbackProxy implements InvocationHandler {

  private Logger logger;
  private Window.Callback callback;
  private TouchEventHandler eventHandler;

  public Window.Callback getOriginalCallback() {
    return callback;
  }

  public static Window.Callback newCallbackProxyForActivity(
      Window.Callback callback, TouchEventHandler eventHandler, Logger logger) {
    Object proxy = java.lang.reflect.Proxy.newProxyInstance(
        callback.getClass().getClassLoader(), 
        new Class[]{ Window.Callback.class}, 
        new WindowCallbackProxy(callback, eventHandler, logger));
    
    return (Window.Callback) proxy;
  }

  private WindowCallbackProxy(Window.Callback callback,
      TouchEventHandler eventHandler, Logger logger) {
    this.callback = callback;
    this.eventHandler = eventHandler;
    this.logger = logger;
  }

  public Object invoke(Object proxy, Method method, Object[] args)
      throws Throwable {

    Object result;
    if (method.getName().equals("dispatchTouchEvent")) {
      if (args != null && args.length > 0) {
        Object event = args[0];

        if (event != null
            && event instanceof MotionEvent
            && (((MotionEvent) event).getActionMasked() == MotionEvent.ACTION_DOWN || ((MotionEvent) event)
                .getActionMasked() == MotionEvent.ACTION_POINTER_DOWN)) {
          logger.log(LogLevel.VERBOSE, "Touch event received.");
          eventHandler.onTouchEventReceived();
        }
      }
    }
    // invoke the method as normal
    result = method.invoke(callback, args);
    return result;
  }

}

Java Source Code List

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