Android Gallery仿3D圖片瀏覽不支持4.1系統的問題

首先貼Gallery仿3D的7源碼：

package cn.pyz.mypro.define;


import android.content.Context;
import android.graphics.Camera;
import android.graphics.Matrix;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.view.animation.Transformation;
import android.widget.Gallery;

public class CoverFlow extends Gallery {

private Camera mCamera = new Camera();
private int mMaxRotationAngle = 45; //60
private int mMaxZoom = -150; //-120
private int mCoveflowCenter;
private boolean mAlphaMode = true;
private boolean mCircleMode = false;


public CoverFlow(Context context) {
super(context);
this.setStaticTransformationsEnabled(true);
}

public CoverFlow(Context context, AttributeSet attrs) {
super(context, attrs);
this.setStaticTransformationsEnabled(true);
}

public CoverFlow(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
this.setStaticTransformationsEnabled(true);
}

public int getMaxRotationAngle() {
return mMaxRotationAngle;
}

public void setMaxRotationAngle(int maxRotationAngle) {
mMaxRotationAngle = maxRotationAngle;
}

public boolean getCircleMode() {
return mCircleMode;
}


public void setCircleMode(boolean isCircle) {
mCircleMode = isCircle;
}


public boolean getAlphaMode() {
return mAlphaMode;
}


public void setAlphaMode(boolean isAlpha) {
mAlphaMode = isAlpha;
}


public int getMaxZoom() {
return mMaxZoom;
}


public void setMaxZoom(int maxZoom) {
mMaxZoom = maxZoom;
}


private int getCenterOfCoverflow() {
return (getWidth() - getPaddingLeft() - getPaddingRight()) / 2
+ getPaddingLeft();
}


private static int getCenterOfView(View view) {
System.out.println("-------%1---view.getLeft--------"+view.getLeft());
System.out.println("-------%2---view.getWith--------"+view.getWidth());
return view.getLeft() + view.getWidth() / 2;
}


@Override
protected boolean getChildStaticTransformation(View child, Transformation t) {
final int childCenter = getCenterOfView(child);
final int childWidth = child.getWidth();
int rotationAngle = 0;
t.clear();
t.setTransformationType(Transformation.TYPE_MATRIX);
if (childCenter == mCoveflowCenter) {
transformImageBitmap((View) child, t, 0, 0);
} else {
rotationAngle = (int) (((float) (mCoveflowCenter - childCenter) / childWidth) * mMaxRotationAngle);
// Log.d("test", "recanglenum:"+Math.floor ((mCoveflowCenter -
// childCenter) / childWidth));
if (Math.abs(rotationAngle) > mMaxRotationAngle) {
rotationAngle = (rotationAngle < 0) ? -mMaxRotationAngle   
: mMaxRotationAngle;
}
transformImageBitmap((View) child, t, rotationAngle,
(int) Math.floor((mCoveflowCenter - childCenter)/ (childWidth==0?1:childWidth)));
}
return true;
}


/**
* This is called during layout when the size of this view has changed. If
* you were just added to the view hierarchy, you're called with the old
* values of 0.
* 
* @param w
*            Current width of this view.
* @param h
*            Current height of this view.
* @param oldw
*            Old width of this view.
* @param oldh
*            Old height of this view.
*/
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
mCoveflowCenter = getCenterOfCoverflow();
super.onSizeChanged(w, h, oldw, oldh);
}


/**
* Transform the Image Bitmap by the Angle passed
* 
* @param imageView
*            ImageView the ImageView whose bitmap we want to rotate
* @param t
*            transformation
* @param rotationAngle
*            the Angle by which to rotate the Bitmap
*/
private void transformImageBitmap(View child, Transformation t,
int rotationAngle, int d) {
mCamera.save();
final Matrix imageMatrix = t.getMatrix();
final int imageHeight = child.getLayoutParams().height;
final int imageWidth = child.getLayoutParams().width;
final int rotation = Math.abs(rotationAngle);
mCamera.translate(0.0f, -5.0f, 100.0f); //
// As the angle of the view gets less, zoom in

 
 
 

  
  
  
  

 
 

 
if (rotation <= mMaxRotationAngle)

 
 
 

  
  
  
  

 

  
  { 

 
float zoomAmount = (float) (mMaxZoom + (rotation * 10f));
mCamera.translate(0.0f, -5.0f, zoomAmount); //
if (mCircleMode) {
if (rotation < 40)
mCamera.translate(0.0f, 155, 5f);
else
mCamera.translate(0.0f, (255 - rotation * 10f), 10f);
}
//	 if (mAlphaMode) {
//	 ((ImageView) (child)).setAlpha((int) (255 - rotation * 2.5));
//	 }
}
mCamera.rotateY(rotationAngle);
mCamera.getMatrix(imageMatrix);


imageMatrix.preTranslate(-(imageWidth / 2), -(imageHeight / 2));
imageMatrix.postTranslate((imageWidth / 2), (imageHeight / 2));
mCamera.restore();
}
}

這段代碼在Android 4.1一下的版本中都是能夠正常運行3D效果的，效果很炫，可是在Android4.1的版本上當你滑動的時候就會出現圖片顯示大小不一，錯位等狀況，光這個問題研究了一週，最後終於本身研究出來了，其實就是和硬件加速有關係，Android系統中會對2D和一些3D的應用進行硬件加速，由於這些都是很是好資源的，因此解決的辦法就是在你的註冊文件中添加 android:hardwareAccelerated="false"，這句話是讓硬件加速在你不須要的Activity中對它進行屏蔽，這樣在Android4.1系統中就能正常顯示Gallery3D效果啦