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是否有任何库可用于 iphone 中可用的图像轮播动画
http://cocoacontrols.com/platforms/ios/controls/icarousel
我使用了封面流，但它没有像 iphone 中的 iCarousel 那样产生效果，所以
如果我可以通过其他一些技巧来实现这一点，请给我
谢谢
Coverflow.java
资源图像适配器
全局变量
图像数据
包 pl.polidea.coverflow;
ReflectingImageAdapter
想改善这个问题吗？更新问题，使其成为 Stack Overflow 的 on-topic。
4年前关闭。
Improve this question
是否有任何库可用于 iphone 中可用的图像轮播动画
http://cocoacontrols.com/platforms/ios/controls/icarousel
我使用了封面流，但它没有像 iphone 中的 iCarousel 那样产生效果，所以
如果我可以通过其他一些技巧来实现这一点，请给我
谢谢
最佳答案
可能正在使用您发现看起来像 Carousal 的此代码
主要 CoverFlow Activity
package pl.polidea.coverflow;
import java.util.ArrayList;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.BaseAdapter;
import android.widget.TextView;
/**
* The Class CoverFlowTestingActivity.
*/
public class CoverFlowActivity extends Activity {
private TextView textView;
BaseAdapter coverImageAdapter;
/*
* (non-Javadoc)
*
* @see android.app.Activity#onCreate(android.os.Bundle)
*/
private int[] DEFAULT_RESOURCE_LIST = { R.drawable.img1, R.drawable.img2,
R.drawable.img3, R.drawable.img4, R.drawable.img5, R.drawable.img6,
R.drawable.img7, R.drawable.img8 };
private int[] DEFAULT_RESOURCE_LIST1 = { R.drawable.img1a,
R.drawable.img2a, R.drawable.img3a, R.drawable.img4a,
R.drawable.img5a, R.drawable.img6a, R.drawable.img7a,
R.drawable.img8a };
public static ArrayList<Imagedata> i11Set;
@Override
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
textView = (TextView) findViewById(this.getResources().getIdentifier(
"statusText", "id", "pl.polidea.coverflow"));
// note resources below are taken using getIdentifier to allow importing
// this library as library.
/*
* final CoverFlow coverFlow1 = (CoverFlow)
* findViewById(this.getResources().getIdentifier("coverflow", "id",
* "pl.polidea.coverflow")); setupCoverFlow(coverFlow1, false);
*/
final CoverFlow reflectingCoverFlow = (CoverFlow) findViewById(this
.getResources().getIdentifier("coverflowReflect", "id",
"pl.polidea.coverflow"));
setupCoverFlow(reflectingCoverFlow, true);
}
/**
* Setup cover flow.
*
* @param mCoverFlow
* the m cover flow
* @param reflect
* the reflect
*/
private void setupCoverFlow(final CoverFlow mCoverFlow,
final boolean reflect) {
try
{
i11Set = new ArrayList<Imagedata>();
for (int resourceId : DEFAULT_RESOURCE_LIST1) {
i11Set.add(new Imagedata(resourceId));
// Global.i11.add(new Imagedata(resourceId));
}
if (reflect) {
coverImageAdapter = new ReflectingImageAdapter(
new ResourceImageAdapter(this, i11Set), 3);
} else {
coverImageAdapter = new ResourceImageAdapter(this, i11Set);
}
mCoverFlow.setAdapter(coverImageAdapter, -1);
mCoverFlow.setSelection(3, true);
setupListeners(mCoverFlow);
}
catch(Exception e)
{
e.printStackTrace();
}
}
/**
* Sets the up listeners.
*
* @param mCoverFlow
* the new up listeners
*/
private void setupListeners(final CoverFlow mCoverFlow) {
mCoverFlow.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(final AdapterView<?> parent,
final View view, int position, final long id) {
try
{
i11Set = new ArrayList<Imagedata>();
for (int resourceId = 0; resourceId < DEFAULT_RESOURCE_LIST1.length; resourceId++) {
{
if (resourceId == position) {
i11Set.add(new Imagedata(
DEFAULT_RESOURCE_LIST[resourceId]));
} else {
i11Set.add(new Imagedata(
DEFAULT_RESOURCE_LIST1[resourceId]));
}
}
// Global.i11.add(new Imagedata(resourceId));
}
/*for (int resourceId : DEFAULT_RESOURCE_LIST) {
i11Set.add(new Imagedata(resourceId));
// Global.i11.add(new Imagedata(resourceId));
}*/
coverImageAdapter = new ReflectingImageAdapter(
new ResourceImageAdapter(CoverFlowActivity.this,
i11Set), 3);
mCoverFlow.setAdapter(coverImageAdapter, -1);
mCoverFlow.setSelection(position, true);
//coverImageAdapter.notifyDataSetChanged();
// mCoverFlow.invalidate();
}
catch(Exception e)
{
e.printStackTrace();
}
}
});
mCoverFlow.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(final AdapterView<?> parent,
final View view, final int position, final long id) {
textView.setText("Item selected! : " + id);
/*
* coverImageAdapter = new ReflectingImageAdapter(new
* ResourceImageAdapter(CoverFlowActivity.this),position);
* coverImageAdapter.notifyDataSetChanged();
* mCoverFlow.setAdapter(coverImageAdapter,position);
* mCoverFlow.setSelection(position, true);
* mCoverFlow.invalidate();
*/
}
@Override
public void onNothingSelected(final AdapterView<?> parent) {
textView.setText("Nothing clicked!");
}
});
}
}
Coverflow.java
package pl.polidea.coverflow;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Camera;
import android.graphics.Matrix;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.animation.Transformation;
import android.widget.Gallery;
import android.widget.ImageView;
import android.widget.SpinnerAdapter;
/**
* Cover Flow implementation.
*
*/
public class CoverFlow extends Gallery {
/**
* Graphics Camera used for transforming the matrix of ImageViews.
*/
private final Camera mCamera = new Camera();
/**
* The maximum angle the Child ImageView will be rotated by.
*/
private int mMaxRotationAngle = 60;
/**
* The maximum zoom on the centre Child.
*/
private int mMaxZoom = -220;
/**
* The Centre of the Coverflow.
*/
private int mCoveflowCenter;
/** The image height. */
private float imageHeight;
/** The image width. */
private float imageWidth;
/** The reflection gap. */
private float reflectionGap;
/** The with reflection. */
private boolean withReflection;
/** The image reflection ratio. */
private float imageReflectionRatio;
/**
* Gets the image height.
*
* @return the image height
*/
public float getImageHeight() {
return imageHeight;
}
/**
* Sets the image height.
*
* @param imageHeight
* the new image height
*/
public void setImageHeight(final float imageHeight) {
this.imageHeight = imageHeight;
}
/**
* Gets the image width.
*
* @return the image width
*/
public float getImageWidth() {
return imageWidth;
}
/**
* Sets the image width.
*
* @param imageWidth
* the new image width
*/
public void setImageWidth(final float imageWidth) {
this.imageWidth = imageWidth;
}
/**
* Gets the reflection gap.
*
* @return the reflection gap
*/
public float getReflectionGap() {
return reflectionGap;
}
/**
* Sets the reflection gap.
*
* @param reflectionGap
* the new reflection gap
*/
public void setReflectionGap(final float reflectionGap) {
this.reflectionGap = reflectionGap;
}
/**
* Checks if is with reflection.
*
* @return true, if is with reflection
*/
public boolean isWithReflection() {
return withReflection;
}
/**
* Sets the with reflection.
*
* @param withReflection
* the new with reflection
*/
public void setWithReflection(final boolean withReflection) {
this.withReflection = withReflection;
}
/**
* Sets the image reflection ratio.
*
* @param imageReflectionRatio
* the new image reflection ratio
*/
public void setImageReflectionRatio(final float imageReflectionRatio) {
this.imageReflectionRatio = imageReflectionRatio;
}
/**
* Gets the image reflection ratio.
*
* @return the image reflection ratio
*/
public float getImageReflectionRatio() {
return imageReflectionRatio;
}
public CoverFlow(final Context context) {
super(context);
this.setStaticTransformationsEnabled(true);
}
public CoverFlow(final Context context, final AttributeSet attrs) {
this(context, attrs, android.R.attr.galleryStyle);
}
public CoverFlow(final Context context, final AttributeSet attrs, final int defStyle) {
super(context, attrs, defStyle);
parseAttributes(context, attrs);
this.setStaticTransformationsEnabled(true);
}
/**
* Get the max rotational angle of the image.
*
* @return the mMaxRotationAngle
*/
public int getMaxRotationAngle() {
return mMaxRotationAngle;
}
/**
* Sets the.
*
* @param adapter
* the new adapter
*/
public void setAdapter(final SpinnerAdapter adapter,int position) {
if (!(adapter instanceof AbstractCoverFlowImageAdapter)) {
throw new IllegalArgumentException("The adapter should derive from "
+ AbstractCoverFlowImageAdapter.class.getName());
}
final AbstractCoverFlowImageAdapter coverAdapter = (AbstractCoverFlowImageAdapter) adapter;
coverAdapter.setWidth(imageWidth);
coverAdapter.setHeight(imageHeight);
if (withReflection) {
final ReflectingImageAdapter reflectAdapter = new ReflectingImageAdapter(coverAdapter,position);
reflectAdapter.setReflectionGap(reflectionGap);
reflectAdapter.setWidthRatio(imageReflectionRatio);
reflectAdapter.setWidth(imageWidth);
reflectAdapter.setHeight(imageHeight * (1 + imageReflectionRatio));
super.setAdapter(reflectAdapter);
} else {
super.setAdapter(adapter);
}
}
/**
* Set the max rotational angle of each image.
*
* @param maxRotationAngle
* the mMaxRotationAngle to set
*/
public void setMaxRotationAngle(final int maxRotationAngle) {
mMaxRotationAngle = maxRotationAngle;
}
/**
* Get the Max zoom of the centre image.
*
* @return the mMaxZoom
*/
public int getMaxZoom() {
return mMaxZoom;
}
/**
* Set the max zoom of the centre image.
*
* @param maxZoom
* the mMaxZoom to set
*/
public void setMaxZoom(final int maxZoom) {
mMaxZoom = maxZoom;
}
/**
* Get the Centre of the Coverflow.
*
* @return The centre of this Coverflow.
*/
private int getCenterOfCoverflow() {
return (getWidth() - getPaddingLeft() - getPaddingRight()) / 2 + getPaddingLeft();
}
/**
* Get the Centre of the View.
*
* @return The centre of the given view.
*/
private static int getCenterOfView(final View view) {
return view.getLeft() + view.getWidth() / 2;
}
/**
* {@inheritDoc}
*
* @see #setStaticTransformationsEnabled(boolean)
*/
@Override
protected boolean getChildStaticTransformation(final View child, final 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);
} else {
//child.setLayoutParams(new LayoutParams(100,100));
rotationAngle = (int) ((float) (mCoveflowCenter - childCenter) / childWidth * mMaxRotationAngle);
if (Math.abs(rotationAngle) > mMaxRotationAngle) {
rotationAngle = rotationAngle < 0 ? -mMaxRotationAngle : mMaxRotationAngle;
}
Log.d("rotation Angle",""+rotationAngle);
transformImageBitmap((ImageView) child, t, rotationAngle);
}
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.
*/
@Override
protected void onSizeChanged(final int w, final int h, final int oldw, final 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(final ImageView child, final Transformation t, final int rotationAngle) {
mCamera.save();
final Matrix imageMatrix = t.getMatrix();
final int height = child.getLayoutParams().height;
final int width = 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) {
//child.setLayoutParams(new LayoutParams(200,200));
final float zoomAmount = (float) (mMaxZoom + rotation * 10.0);
mCamera.translate(0.0f, 0.0f, zoomAmount);
}
mCamera.rotateY(rotationAngle);
mCamera.getMatrix(imageMatrix);
imageMatrix.preTranslate(-(width / 2.0f), -(height / 2.0f));
imageMatrix.postTranslate((width / 2.0f), (height / 2.0f));
mCamera.restore();
}
/**
* Parses the attributes.
*
* @param context
* the context
* @param attrs
* the attrs
*/
private void parseAttributes(final Context context, final AttributeSet attrs) {
final TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CoverFlow);
try {
imageWidth = a.getDimension(R.styleable.CoverFlow_imageWidth, 480);
imageHeight = a.getDimension(R.styleable.CoverFlow_imageHeight, 320);
withReflection = a.getBoolean(R.styleable.CoverFlow_withReflection, false);
imageReflectionRatio = a.getFloat(R.styleable.CoverFlow_imageReflectionRatio, 0.2f);
reflectionGap = a.getDimension(R.styleable.CoverFlow_reflectionGap, 4);
setSpacing(-50);
} finally {
a.recycle();
}
}
/* @Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
// TODO Auto-generated method stub
boolean leftScroll = isScrollingLeft(e1, e2);
float velX;
if(leftScroll)
{
velX=500;
}
else
{
velX=-500;
}
return super.onFling(e1, e2, velX, velocityY);
}
private boolean isScrollingLeft(MotionEvent e1, MotionEvent e2){
return e2.getX() > e1.getX();
}*/
}
资源图像适配器
package pl.polidea.coverflow;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.util.Log;
/**
* This class is an adapter that provides images from a fixed set of resource
* ids. Bitmaps and ImageViews are kept as weak references so that they can be
* cleared by garbage collection when not needed.
*
*/
public class ResourceImageAdapter extends AbstractCoverFlowImageAdapter {
/** The Constant TAG. */
private static final String TAG = ResourceImageAdapter.class
.getSimpleName();
/** The Constant DEFAULT_LIST_SIZE. */
private static final int DEFAULT_LIST_SIZE = 20;
/** The Constant IMAGE_RESOURCE_IDS. */
private static final List<Integer> IMAGE_RESOURCE_IDS = new ArrayList<Integer>(
DEFAULT_LIST_SIZE);
/** The Constant DEFAULT_RESOURCE_LIST. */
private static final int[] DEFAULT_RESOURCE_LIST = { R.drawable.img1a,
R.drawable.img2a, R.drawable.img3a, R.drawable.img4a,
R.drawable.img5a, R.drawable.img6a, R.drawable.img7a,
R.drawable.img8a };
/** The bitmap map. */
private final Map<Integer, WeakReference<Bitmap>> bitmapMap = new HashMap<Integer, WeakReference<Bitmap>>();
private final Context context;
private Imagedata i1;
// private ArrayList<Imagedata> i11=new ArrayList<Imagedata>();
/**
* Creates the adapter with default set of resource images.
*
* @param context
* context
*/
public ResourceImageAdapter(final Context context,
ArrayList<Imagedata> i11get) {
super();
this.context = context;
setResources(i11get);
}
/**
* Replaces resources with those specified.
*
* @param resourceIds
* array of ids of resources.
*/
public final synchronized void setResources(ArrayList<Imagedata> resourceIds) {
/*
* IMAGE_RESOURCE_IDS.clear();
*
* for (final int resourceId : resourceIds) {
* IMAGE_RESOURCE_IDS.add(resourceId);
*
* Global.i11.add(new Imagedata(resourceId)); }
*/
// Global.i11.clear();
try
{
Global.i11=new ArrayList<Imagedata>();
Global.i11 = resourceIds;
Log.d("Size of i11", "" + Global.i11.size());
notifyDataSetChanged();
}
catch(Exception e)
{
e.printStackTrace();
}
}
/*
* (non-Javadoc)
*
* @see android.widget.Adapter#getCount()
*/
@Override
public synchronized int getCount() {
return Global.i11.size();
}
/*
* (non-Javadoc)
*
* @see pl.polidea.coverflow.AbstractCoverFlowImageAdapter#createBitmap(int)
*/
@Override
protected Bitmap createBitmap(final int position) {
Log.v(TAG, "creating item " + position);
final Bitmap bitmap = ((BitmapDrawable) context.getResources()
.getDrawable(Global.i11.get(position).getSetResourceId()))
.getBitmap();
bitmapMap.put(position, new WeakReference<Bitmap>(bitmap));
return bitmap;
}
}
全局变量
package pl.polidea.coverflow;
import java.util.ArrayList;
public class Global {
public static ArrayList<Imagedata> i11=new ArrayList<Imagedata>();
}
图像数据
包 pl.polidea.coverflow;
public class Imagedata {
private int setResourceId;
public Imagedata()
{}
public Imagedata(int rid) {
super();
this.setResourceId=rid;
}
public int getSetResourceId() {
return setResourceId;
}
public void setSetResourceId(int setResourceId) {
this.setResourceId = setResourceId;
}
}
ReflectingImageAdapter
package pl.polidea.coverflow;
import android.R.color;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Shader.TileMode;
import android.util.Log;
/**
* This adapter provides reflected images from linked adapter.
*
* @author potiuk
*
*/
public class ReflectingImageAdapter extends AbstractCoverFlowImageAdapter {
/** The linked adapter. */
private final AbstractCoverFlowImageAdapter linkedAdapter;
/**
* Gap between the image and its reflection.
*/
private float reflectionGap;
/** The image reflection ratio. */
private float imageReflectionRatio;
public int id;
private int position=-1;
/**
* Sets the width ratio.
*
* @param imageReflectionRatio
* the new width ratio
*/
public void setWidthRatio(final float imageReflectionRatio) {
this.imageReflectionRatio = imageReflectionRatio;
}
/**
* Creates reflecting adapter.
*
* @param linkedAdapter
* adapter that provides images to get reflections
*/
public ReflectingImageAdapter(
final AbstractCoverFlowImageAdapter linkedAdapter, int id) {
super();
this.id=id;
this.linkedAdapter = linkedAdapter;
}
/**
* Sets the reflection gap.
*
* @param reflectionGap
* the new reflection gap
*/
public void setReflectionGap(final float reflectionGap) {
this.reflectionGap = reflectionGap;
}
/**
* Gets the reflection gap.
*
* @return the reflection gap
*/
public float getReflectionGap() {
return reflectionGap;
}
/*
* (non-Javadoc)
*
* @see pl.polidea.coverflow.AbstractCoverFlowImageAdapter#createBitmap(int)
*/
@Override
protected Bitmap createBitmap(int position) {
// this.position=position;
return createReflectedImages(linkedAdapter.getItem(position),position);
}
/**
* Creates the reflected images.
*
* @param originalImage
* the original image
* @return true, if successful
*/
public Bitmap createReflectedImages(Bitmap originalImage,int position) {
Bitmap sepia=null ;
// Log.d("Id is",""+id);
// Log.d("position is","position"+position);
/*if(id==position)
{*/
sepia=originalImage;
/*}
else
{
sepia = ConvertToBlackAndWhite(originalImage);
}*/
final int width = sepia.getWidth();
final int height = sepia.getHeight();
final Matrix matrix = new Matrix();
matrix.preScale(1, -1);
final Bitmap reflectionImage = Bitmap.createBitmap(sepia, 0,
(int) (height * imageReflectionRatio), width,
(int) (height - height * imageReflectionRatio), matrix, false);
final Bitmap bitmapWithReflection = Bitmap.createBitmap(width,
(int) (height + height * imageReflectionRatio),
Config.ARGB_8888);
final Canvas canvas = new Canvas(bitmapWithReflection);
canvas.drawBitmap(sepia, 0, 0, null);
final Paint deafaultPaint = new Paint();
deafaultPaint.setColor(color.transparent);
canvas.drawBitmap(reflectionImage, 0, height + reflectionGap, null);
final Paint paint = new Paint();
final LinearGradient shader = new LinearGradient(0, sepia.getHeight(),
0, bitmapWithReflection.getHeight() + reflectionGap,
0x70ffffff, 0x00ffffff, TileMode.CLAMP);
paint.setShader(shader);
paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));
canvas.drawRect(0, height, width, bitmapWithReflection.getHeight()
+ reflectionGap, paint);
return bitmapWithReflection;
}
/*
* (non-Javadoc)
*
* @see android.widget.Adapter#getCount()
*/
@Override
public int getCount() {
return linkedAdapter.getCount();
}
public Bitmap toSephia(Bitmap bmpOriginal) {
int width, height, r, g, b, c, gry;
height = bmpOriginal.getHeight();
width = bmpOriginal.getWidth();
int depth = 20;
Bitmap bmpSephia = Bitmap.createBitmap(width, height,
Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bmpSephia);
Paint paint = new Paint();
ColorMatrix cm = new ColorMatrix();
cm.setScale(.3f, .3f, .3f, 1.0f);
ColorMatrixColorFilter f = new ColorMatrixColorFilter(cm);
paint.setColorFilter(f);
canvas.drawBitmap(bmpOriginal, 0, 0, paint);
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
c = bmpOriginal.getPixel(x, y);
r = Color.red(c);
g = Color.green(c);
b = Color.blue(c);
gry = (r + g + b) / 3;
r = g = b = gry;
r = r + (depth * 2);
g = g + depth;
if (r > 255) {
r = 255;
}
if (g > 255) {
g = 255;
}
bmpSephia.setPixel(x, y, Color.rgb(r, g, b));
}
}
return bmpSephia;
}
public Bitmap ConvertToBlackAndWhite(Bitmap sampleBitmap) {
ColorMatrix bwMatrix = new ColorMatrix();
bwMatrix.setSaturation(0);
final ColorMatrixColorFilter colorFilter = new ColorMatrixColorFilter(
bwMatrix);
Bitmap rBitmap = sampleBitmap.copy(Bitmap.Config.ARGB_8888, true);
Paint paint = new Paint();
paint.setColorFilter(colorFilter);
Canvas myCanvas = new Canvas(rBitmap);
myCanvas.drawBitmap(rBitmap, 0, 0, paint);
return rBitmap;
}
}
10-08 15:25