超炫的3D特效相冊功能android（下）

tank我昨天我花了點時間重新整理了一下，加了很多注釋希望讓大家能夠看的很明白

整理後在原來的基礎上，實現一個超炫的3D特效程序管理功能，所以更有用途了，不僅僅只是顯示圖片了。

實現的效果：
用3D效果顯示所有已安裝的程序列表，點擊某張圖片時動態顯示到最前一張，長按可以打開該程序。（如上篇博客展示的樣子，這裡不再貼出）

主要思路流程如下：

@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // 實例化launcher列表，得到應用程序的信息列表（包括圖片）
        getLauncher();

        final CoverFlow cf = new CoverFlow(this);//重寫Garry的getChildStaticTransformation ，產生層疊和放大效果
        //填充我的要的圖片 http://www.cnblogs.com/tankaixiong/（原）
        cf.setAdapter(new ImageAdapter(this));
        //自定義圖片的填充方式
        ImageAdapter imageAdapter = new ImageAdapter(this);
        cf.setAdapter(imageAdapter);
        cf.setAnimationDuration(1500);
        cf.setOnItemClickListener(this);
        cf.setOnItemLongClickListener(lonClick);
        setContentView(cf);

    }


第一步：
創建一個實體類來保存程序信息：

LauncherItem

package com.android.tank;

import android.content.ComponentName;
import android.graphics.drawable.Drawable;

public class LauncherItem {
    Drawable icon;
    String name;
    ComponentName component;

    LauncherItem(Drawable d, String s, ComponentName cn) {
        icon = d;
        name = s;
        component = cn;
    }

    public Drawable getIcon() {
        return icon;
    }

    public void setIcon(Drawable icon) {
        this.icon = icon;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public ComponentName getComponent() {
        return component;
    }

    public void setComponent(ComponentName component) {
        this.component = component;
    }
   
};

第二步：存入

//這裡保存從應用程序中獲取到的信息LIST（包括圖片的信息），你也可以自己定一個圖片集合
    List<LauncherItem> lvalue;

    // 獲得app 列表信息
    public void getLauncher() {
        lvalue = new ArrayList<LauncherItem>();

        PackageManager pkgMgt = this.getPackageManager();//這個方法是關鍵

        // to query all launcher & load into List<>
        Intent it = new Intent(Intent.ACTION_MAIN);
        it.addCategory(Intent.CATEGORY_LAUNCHER);

        List<ResolveInfo> ra = pkgMgt.queryIntentActivities(it, 0);//查詢
        //存入集合中 http://www.cnblogs.com/tankaixiong/（原）
        for (int i = 0; i < ra.size(); i++) {
            ActivityInfo ai = ra.get(i).activityInfo;

            // String ainfo = ai.toString();
            Drawable icon = ai.loadIcon(pkgMgt);
            String label = ai.loadLabel(pkgMgt).toString();
            ComponentName c = new ComponentName(ai.applicationInfo.packageName,
                    ai.name);

            LauncherItem item = new LauncherItem(icon, label, c);

            lvalue.add(item);
        }

    }

第三步：重寫baseadapter
public class ImageAdapter extends BaseAdapter {
        int mGalleryItemBackground;
        private Context mContext;

        public ImageAdapter(Context context) {
            mContext = context;
            TypedArray typedArray = obtainStyledAttributes(R.styleable.Gallery);
            mGalleryItemBackground = typedArray.getResourceId(
                    R.styleable.Gallery_android_galleryItemBackground, 0);
        }

        // 第1點改進，返回一個很大的值，例如，Integer.MAX_VALUE
        public int getCount() {
            return resIds.length;
        }

        public Object getItem(int position) {
            return position;
        }

        public long getItemId(int position) {
            return position;
        }

        public View getView(int position, View convertView, ViewGroup parent) {
           
            ImageView iv = new ImageView(mContext);
            iv.setImageDrawable(lvalue.get(position).icon);

            iv.setImageBitmap(MyImgView.createReflectedImage(MyImgView
                    .drawableToBitmap(lvalue.get(position).icon)));//加入處理過的圖片
            iv.setLayoutParams(new Gallery.LayoutParams(80, 60));

            return iv;
        }

第四步：處理圖片，產生特效
package com.android.tank;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.PorterDuffXfermode;
import android.graphics.Bitmap.Config;
import android.graphics.PorterDuff.Mode;
import android.graphics.Shader.TileMode;
import android.graphics.drawable.Drawable;

public class MyImgView {

    /**
     * 添加倒影，原理，先翻轉圖片，由上到下放大透明度
     * http://www.cnblogs.com/tankaixiong/（原）
     * @param originalImage
     * @return
     */
    public static Bitmap createReflectedImage(Bitmap originalImage) {
        // The gap we want between the reflection and the original image
        final int reflectionGap = 4;

        int width = originalImage.getWidth();
        int height = originalImage.getHeight();

        // This will not scale but will flip on the Y axis
        Matrix matrix = new Matrix();
        matrix.preScale(1, -1);

        // Create a Bitmap with the flip matrix applied to it.
        // We only want the bottom half of the image
        Bitmap reflectionImage = Bitmap.createBitmap(originalImage, 0,
                height / 2, width, height / 2, matrix, false);

        // Create a new bitmap with same width but taller to fit reflection
        Bitmap bitmapWithReflection = Bitmap.createBitmap(width,
                (height + height / 2), Config.ARGB_8888);

        // Create a new Canvas with the bitmap that's big enough for
        // the image plus gap plus reflection
        Canvas canvas = new Canvas(bitmapWithReflection);
        // Draw in the original image
        canvas.drawBitmap(originalImage, 0, 0, null);
        // Draw in the gap http://www.cnblogs.com/tankaixiong/（原）
        Paint defaultPaint = new Paint();
        canvas.drawRect(0, height, width, height + reflectionGap, defaultPaint);
        // Draw in the reflection
        canvas.drawBitmap(reflectionImage, 0, height + reflectionGap, null);

        // Create a shader that is a linear gradient that covers the reflection
        Paint paint = new Paint();
        LinearGradient shader = new LinearGradient(0,
                originalImage.getHeight(), 0, bitmapWithReflection.getHeight()
                        + reflectionGap, 0x70ffffff, 0x00ffffff, TileMode.CLAMP);
        // Set the paint to use this shader (linear gradient)
        paint.setShader(shader);
        // Set the Transfer mode to be porter duff and destination in
        paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));
        // Draw a rectangle using the paint with our linear gradient
        canvas.drawRect(0, height, width, bitmapWithReflection.getHeight()
                + reflectionGap, paint);

        return bitmapWithReflection;
    }
    //drawable 類型轉化為bitmap
    public static Bitmap drawableToBitmap(Drawable drawable) {

        Bitmap bitmap = Bitmap
                .createBitmap(
                        drawable.getIntrinsicWidth(),
                        drawable.getIntrinsicHeight(),
                        drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
                                : Bitmap.Config.RGB_565);
        Canvas canvas = new Canvas(bitmap);
        // canvas.setBitmap(bitmap);
        drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable
                .getIntrinsicHeight());
        drawable.draw(canvas);
        return bitmap;
    }

}

第五步：

重寫Garry 來達到層疊效果。
package com.android.tank;

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;
import android.widget.ImageView;
//自己定義的Gallery
public class CoverFlow extends Gallery {

    private Camera mCamera = new Camera();
    private int mMaxRotationAngle = 50;
    private int mMaxZoom = -500;
    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) {
        return view.getLeft() + view.getWidth() / 2;
    }
    //重寫Garray方法 ，產生層疊和放大效果
    @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((ImageView) 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((ImageView) 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.
     * http://www.cnblogs.com/tankaixiong/（原）
     * @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
     * http://www.cnblogs.com/tankaixiong/（原）
     * @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(ImageView 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, 0.0f, 100.0f);
        // As the angle of the view gets less, zoom in
        if (rotation <= mMaxRotationAngle) {
            float zoomAmount = (float) (mMaxZoom + (rotation * 1.5));
            mCamera.translate(0.0f, 0.0f, zoomAmount);
            if (mCircleMode) {
                if (rotation < 40)
                    mCamera.translate(0.0f, 155, 0.0f);
                else
                    mCamera.translate(0.0f, (255 - rotation * 2.5f), 0.0f);
            }
            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();
    }
}

最後是表示層：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <Gallery android:id="@+id/gallery" android:layout_width="fill_parent"
        android:layout_height="wrap_content" android:layout_marginTop="30dp" />
    <ImageSwitcher android:id="@+id/imageswitcher"
        android:layout_width="fill_parent" android:layout_height="wrap_content"
        android:layout_marginTop="30dp" />
</LinearLayout>

好了，大概就這些了，整理這麼多東東貼出可花了我不少時間呢，希望對大家有幫助！

這裡提供源碼下載的地址（請尊重tank的心血成果）：

 MyApplicationMenu.rar