is Canvas Hardware Accelerated - Android Graphics

Android examples for Graphics:Canvas

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Description

is Canvas Hardware Accelerated

Demo Code

/****************************************************************************
 **/*from  ww  w . ja  v a  2  s.c om*/
 ** Copyright (C) 2010-2012 UC Mobile Ltd. All Rights Reserved
 ** File        : CanvasHelper.java
 **
 ** Description : Use reflection to call methods on Canvas above Android 2.2
 **
 ** Creation    : 2012/11/07
 ** Author      : Roger (yixx@ucweb.com)
 ** History     :
 **               Creation, 2012/11/07, Roger, Create the file
 **
 ****************************************************************************/
//package com.java2s;
import java.lang.ref.WeakReference;
import java.lang.reflect.Method;
import android.graphics.Canvas;

public class Main {
    public static final boolean IS_HARDWARE_ACCELERATED_FAST_CALL = true;
    private static Method methodIsHardwareAccelerated;
    private static WeakReference<Canvas> sLastCanvas;
    private static boolean sLastCanvasIsHardwareAccelerated;

    static public boolean isHardwareAccelerated(Canvas canvas) {
        // Return cached value, faster than use reflection
        if (sLastCanvas != null && sLastCanvas.get() == canvas) {
            return sLastCanvasIsHardwareAccelerated;
        }

        sLastCanvasIsHardwareAccelerated = false;
        if (methodIsHardwareAccelerated != null) {
            try {
                Object result = methodIsHardwareAccelerated.invoke(canvas);
                sLastCanvasIsHardwareAccelerated = (Boolean) result;
            } catch (Throwable t) {
            }
        }
        if (IS_HARDWARE_ACCELERATED_FAST_CALL)
            sLastCanvas = new WeakReference<Canvas>(canvas);
        return sLastCanvasIsHardwareAccelerated;
    }
}

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