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android超炫的3D特效

PC上不说了一些很炫的界面效果很多,其实android上也可以实现很多很COOL的特效。先看一下效果吧!相册功能的效果:下面是加载的andriod 里的程序,用3D效果列出来。这个可以做为android开机后的首页应该也很cool!......

PC上不说了一些很炫的界面效果很多,其实android上也可以实现很多很COOL的特效。

先看一下效果吧!

相册功能的效果:

下面是加载的andriod 里的程序,用3D效果列出来。这个可以做为android开机后的首页应该也很cool!

图片的效果是有倒影,有层次重叠的3D效果,左右图片之间切换,图片任意滑动,

还可以点击的任意后面的图片就会跑到最前面,有点像苹果的相册

这个实现起来其实并不复杂,原理我现在大致讲一下:

首先准备图片存入数组中,用Gallery实现图片的切换这个简单这里不多讲,这里要注意的层次重叠效果

只要设置图片相应的大小和位置的间距及摆放就可以了。

讲下实现倒影的原理,添加倒影,先翻转图片并设置好位置,再由上到下放大透明度也就是渐渐变淡了。

昨天我花了点时间重新整理了一下,加了很多注释希望让大家能够看的很明白

整理后在原来的基础上,实现一个超炫的3D特效程序管理功能,所以更有用途了,不仅仅只是显示图片了。

实现的效果:

用3D效果显示所有已安装的程序列表,点击某张图片时动态显示到最前一张,长按可以打开该程序。(如上篇博客展示的样子,这里不再贴出)

主要思路流程如下:

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

// 实例化launcher列表,得到应用程序的信息列表(包括图片)

getLauncher();

final CoverFlow cf = new CoverFlow(this);//重写Garry的getChildStaticTransformation ,产生层叠和放大效果

//填充我的要的图片 http://www.cnblogs.com/tankaixiong/(原)

cf.setAdapter(new ImageAdapter(this));

//自定义图片的填充方式

ImageAdapter imageAdapter = new ImageAdapter(this);

cf.setAdapter(imageAdapter);

cf.setAnimationDuration(1500);

cf.setOnItemClickListener(this);

cf.setOnItemLongClickListener(lonClick);

setContentView(cf);

}

第一步:

创建一个实体类来保存程序信息:

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

//这里保存从应用程序中获取到的信息LIST(包括图片的信息),你也可以自己定一个图片集合

List lvalue;

// 获得app 列表信息

public void getLauncher() {

lvalue = new ArrayList();

PackageManager pkgMgt = this.getPackageManager();//这个方法是关键

// to query all launcher & load into List<>

Intent it = new Intent(Intent.ACTION_MAIN);

it.addCategory(Intent.CATEGORY_LAUNCHER);

List ra = pkgMgt.queryIntentActivities(it, 0);//查询

//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:重写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点改进,返回一个很大的值,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)));//加入处理过的图片

iv.setLayoutParams(new Gallery.LayoutParams(80, 60));

return iv;

}

第四步:处理图片,产生特效

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,先翻转图片,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 类型转化为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:

重写Garry 来达到层叠效果。

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;

//自己定义的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;

}

//重写Garray方法 ,产生层叠和放大效果

@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();

}

}

最后是表示层:

android:orientation="vertical" android:layout_width="fill_parent"

android:layout_height="fill_parent">

android:layout_height="wrap_content" android:layout_marginTop="30dp" />

android:layout_width="fill_parent" android:layout_height="wrap_content"

android:layout_marginTop="30dp" />