Android Gallery简单3d效果使用

为避免每次都要去找，还是自己整理一下好了。有需要的同学自行下载源码，只要稍微有点基本功的同学估计都看得懂！至于新手而言，能拿来用就好了，我们并不关心“手机”是如何生产出来的，只要知道手机怎么使用就好。。。

Gallery修改类：

/**     * The camera class is used to 3D transformation matrix.     */    private Camera mCamera = new Camera();    private Matrix mMatrix = new Matrix();    /**     * The max rotation angle.     */    private int mMaxRotationAngle = 60;    /**     * The max zoom value (Z axis).     */    private int mMaxZoom = -120;    /**     * The center of the gallery.     */    private int mCoveflowCenter = 0;    public GalleryFlow(Context context) {        this(context, null);        // this.setStaticTransformationsEnabled(true);        // Enable set the children drawing order.        this.setChildrenDrawingOrderEnabled(true);    }    public GalleryFlow(Context context, AttributeSet attrs) {        this(context, attrs, 0);        // this.setStaticTransformationsEnabled(true);        // Enable set the children drawing order.        this.setChildrenDrawingOrderEnabled(true);    }    public GalleryFlow(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        // Enable set transformation.        // this.setStaticTransformationsEnabled(true);        // Enable set the children drawing order.        this.setChildrenDrawingOrderEnabled(true);    }    public int getMaxRotationAngle() {        return mMaxRotationAngle;    }    public void setMaxRotationAngle(int maxRotationAngle) {        mMaxRotationAngle = maxRotationAngle;    }    public int getMaxZoom() {        return mMaxZoom;    }    public void setMaxZoom(int maxZoom) {        mMaxZoom = maxZoom;    }    @Override    protected int getChildDrawingOrder(int childCount, int i) {        // Current selected index.        int selectedIndex = getSelectedItemPosition()                - getFirstVisiblePosition();        if (selectedIndex < 0) {            return i;        }        if (i < selectedIndex) {            return i;        } else if (i >= selectedIndex) {            return childCount - 1 - i + selectedIndex;        } else {            return i;        }    }    @Override    protected void onSizeChanged(int w, int h, int oldw, int oldh) {        mCoveflowCenter = getCenterOfCoverflow();        super.onSizeChanged(w, h, oldw, oldh);    }    // 获得Coverflow的中点（应该是图片流视图的中点）    private int getCenterOfCoverflow() {        return ((getWidth() - getPaddingLeft() - getPaddingRight()) >> 1)                + getPaddingLeft();        // return (getWidth() - getPaddingLeft() - getPaddingRight()) / 2 +        // getPaddingLeft();    }    // 获得子view的中点    private int getCenterOfView(View view) {        return view.getLeft() + view.getWidth() / 2;    }    // 计算 child 偏离 父控件中心的 offset 值， -1 <= offset <= 1    protected float calculateOffsetOfCenter(View view) {        final int pCenter = getCenterOfCoverflow();        final int cCenter = getCenterOfView(view);        float offset = (cCenter - pCenter) / (pCenter * 1.0f);        offset = Math.min(offset, 1.0f);        offset = Math.max(offset, -1.0f);        return offset;    }    // @Override    // public void setUnselectedAlpha(float unselectedAlpha) {    // unselectedAlpha=0xff;    // super.setUnselectedAlpha(unselectedAlpha);    // }    private void transformImageBitmap(View child, Matrix mt, int rotationAngle) {        mCamera.save();        final Matrix imageMatrix = mt;        final int halfWidth = child.getLeft() + (child.getMeasuredWidth() >> 1);        final int halfHeight = child.getMeasuredHeight() >> 1;        final int rotation = Math.abs(rotationAngle);        // Zoom on Z axis.        mCamera.translate(0, 0, mMaxZoom);        if (rotation < mMaxRotationAngle) {            float zoomAmount = (float) (mMaxZoom + rotation * 1.5f);            mCamera.translate(0, 0, zoomAmount);        }        // Rotate the camera on Y axis.        mCamera.rotateY(rotationAngle);        // Get the matrix from the camera, in fact, the matrix is S (scale)        // transformation.        mCamera.getMatrix(imageMatrix);        // The matrix final is T2 * S * T1, first translate the center point to        // (0, 0),        // then scale, and then translate the center point to its original        // point.        // T * S * T        mMatrix.preTranslate(-halfWidth, -halfHeight - 15); // 还没清楚为什么要减去15        mMatrix.postTranslate(halfWidth, halfHeight - 15);        mCamera.restore();    }    void getTransformationMatrix(View child, float offset) {        final int halfWidth = child.getLeft() + (child.getMeasuredWidth() >> 1);        final int halfHeight = child.getMeasuredHeight() >> 1;        mCamera.save();        mCamera.translate(-offset * 50, 0.0f, Math.abs(offset) * 200);        mCamera.getMatrix(mMatrix);        mCamera.restore();        mMatrix.preTranslate(-halfWidth, -halfHeight);        mMatrix.postTranslate(halfWidth, halfHeight);    }    @Override    protected boolean drawChild(Canvas canvas, View child, long drawingTime) {        // TODO Auto-generated method stub        boolean ret;        // Android SDK 4.1        if (android.os.Build.VERSION.SDK_INT > 15) {            getChildStaticTrans(child, mMatrix);            // final float offset = calculateOffsetOfCenter(child);            // getTransformationMatrix(child, offset);            // child.setAlpha(1 - Math.abs(offset));            //            final int saveCount = canvas.save();            canvas.concat(mMatrix);            ret = super.drawChild(canvas, child, drawingTime);            canvas.restoreToCount(saveCount);        } else {            ret = super.drawChild(canvas, child, drawingTime);        }        return ret;    }    protected boolean getChildStaticTrans(View child, Matrix mt) {        final int childCenter = getCenterOfView(child);        final int childWidth = child.getWidth();        int rotationAngle = 0;        if (childCenter == mCoveflowCenter) {            transformImageBitmap(child, mt, 0);        } else {            // Calculate the rotation angle.            rotationAngle = (int) (((float) (mCoveflowCenter - childCenter) / childWidth) * mMaxRotationAngle);            // Make the angle is not bigger than maximum.            if (Math.abs(rotationAngle) > mMaxRotationAngle) {                rotationAngle = (rotationAngle < 0) ? -mMaxRotationAngle                        : mMaxRotationAngle;            }            transformImageBitmap(child, mt, rotationAngle);        }        return true;    }

使用代码片段

/**     * 三步骤     */    private void initPBListCtrl() {        mGallery = (GalleryFlow) findViewById(R.id.gallery_phonebook);        mGallery.setSpacing(3);// 设置画间间隔        mGallery.setAnimationDuration(2000);        mGallery.setGravity(Gravity.CENTER_VERTICAL);        mGallery.setOnItemClickListener(this);        mGallery.setOnItemSelectedListener(this);        mAdapter = new MyAdapter(this, mAllContactsList);        mGallery.setAdapter(mAdapter);    }

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