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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

Answer 1

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;
    }

}

反射图像适配器

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;
    }

}