http://blog.csdn.net/xiaanming/article/details/18730223看了这篇博客，整理出自己需要的代码写了下面这个自定义头像这么一个demo.
效果图：
关键代码：
/***
* 头像控件
* @author LanYan
*
*/
@SuppressLint({ "ClickableViewAccessibility", "DrawAllocation" })
public class PhotoImageView extends View implements OnClickListener{
private Paint mPaint;
private Bitmap mBitmap;
private int newValue;
private int mWidth;
private int mHeight;
private boolean isClickable=true;
public Bitmap getmBitmap() {
return mBitmap;
}
public void setmBitmap(Bitmap mBitmap) {
this.mBitmap = mBitmap;
}
@SuppressWarnings("deprecation")
public PhotoImageView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
// TODO Auto-generated constructor stub
int [] arr=ScreenUtil.initialScreen(context);
mScreenHeight=arr[1];
mScreenWidth=arr[0];
Drawable mDrawable=getBackground();
if(mDrawable!=null){
setmBitmap(ImageUtils.drawableToBitmap(mDrawable));
setBackgroundDrawable(null);
}
mPaint=new Paint();
setOnClickListener(this);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// TODO Auto-generated method stub
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
mHeight=mWidth=mScreenWidth<mScreenHeight?mScreenWidth/3:mScreenHeight/3;
}
public PhotoImageView(Context context, AttributeSet attrs) {
this(context, attrs,0);
// TODO Auto-generated constructor stub
}
public PhotoImageView(Context context) {
this(context,null);
// TODO Auto-generated constructor stub
}
@Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
super.onDraw(canvas);
initDraw(canvas);
}
private void initDraw(Canvas canvas) {
// TODO Auto-generated method stub
newValue=mScreenWidth<=mScreenHeight?mScreenWidth/3/3*2:mScreenHeight/3/3*2;
if(getmBitmap()==null){
Bitmap mNewBitmap=Bitmap.createBitmap(mWidth, mHeight, Config.ARGB_8888);
setmBitmap(mNewBitmap);
}
mBitmap=ImageUtils.zipImage(getmBitmap(),newValue, newValue);
mBitmap=ImageUtils.getRoundedCornerBitmap(mBitmap, mBitmap.getWidth()/2);
mPaint.setAntiAlias(true);
canvas.drawBitmap(getmBitmap(),mWidth/6,mHeight/6, mPaint);
mPaint.setColor(Color.parseColor("#CDC7C1"));
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeWidth(10);
mPaint.setAntiAlias(true);
canvas.drawCircle(mWidth/6+getmBitmap().getWidth()/2,mHeight/6+mBitmap.getHeight()/2, getmBitmap().getWidth()/2+5, mPaint);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(isClickable){
if(listener!=null){
listener.onClick();
}
}
}
public void setBitmap(Bitmap mBitmap){
newValue=mScreenWidth<=mScreenHeight?mScreenWidth/3/3*2:mScreenHeight/3/3*2;
Bitmap mb=ImageUtils.zipImage(mBitmap,newValue, newValue);
mPaint.reset();
mPaint.setAntiAlias(true);
setmBitmap(mb);
postInvalidate();
}
public void setBackground(int id){
newValue=mScreenWidth<=mScreenHeight?mScreenWidth/3/3*2:mScreenHeight/3/3*2;
Drawable mdDrawable=getResources().getDrawable(id);
Bitmap bitmap=ImageUtils.drawableToBitmap(mdDrawable);
Bitmap mb=ImageUtils.zipImage(bitmap,newValue, newValue);
mPaint.reset();
mPaint.setAntiAlias(true);
setmBitmap(mb);
postInvalidate();
}
public interface OnPhotoListener{
void onOpenCamera();
void onOpenPictures();
void onClick();
void onCancel();
}
private OnPhotoListener listener;
private int mScreenWidth;
private int mScreenHeight;
public OnPhotoListener getListener() {
return listener;
}
public void setListener(OnPhotoListener listener) {
this.listener = listener;
}
}import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Shader.TileMode;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.TransitionDrawable;
import android.widget.ImageView;
/**
* 图片处理工具类
* @author LanYan
*
*/
public class ImageUtils {
/***
* 获得圆角图片的方法
* @param bitmap
* @param roundPx
* @return
*/
public static Bitmap getRoundedCornerBitmap(Bitmap bitmap,float roundPx){
Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final int color = 0xff424242;
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
final RectF rectF = new RectF(rect);
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);
return output;
}
/**
* 获得带倒影的图片方法
* @param bitmap
* @return
*/
public static Bitmap createReflectionImageWithOrigin(Bitmap bitmap){
final int reflectionGap = 4;
int width = bitmap.getWidth();
int height = bitmap.getHeight();
Matrix matrix = new Matrix();
matrix.preScale(1, -1);
Bitmap reflectionImage = Bitmap.createBitmap(bitmap,0, height/2, width, height/2, matrix, false);
Bitmap bitmapWithReflection = Bitmap.createBitmap(width, (height + height/2), Config.ARGB_8888);
Canvas canvas = new Canvas(bitmapWithReflection);
canvas.drawBitmap(bitmap, 0, 0, null);
Paint deafalutPaint = new Paint();
canvas.drawRect(0, height,width,height + reflectionGap,
deafalutPaint);
canvas.drawBitmap(reflectionImage, 0, height + reflectionGap, null);
Paint paint = new Paint();
LinearGradient shader = new LinearGradient(0,
bitmap.getHeight(), 0, bitmapWithReflection.getHeight() + reflectionGap, 0x70ffffff, 0x00ffffff, TileMode.CLAMP);
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 转Bitmap
* @param drawable
* @return
*/
public static Bitmap drawableToBitmap(Drawable drawable){
BitmapDrawable bd = (BitmapDrawable) drawable;
return bd.getBitmap();
}
/**
* Bitmap 转Drawable
* @param drawable
* @return
*/
@SuppressWarnings("deprecation")
public static Drawable bitmapToDrawable(Bitmap bitmap) {
BitmapDrawable bd = new BitmapDrawable(bitmap);
return bd;
}
/***
* 图片的缩放方法
*
* @param bgimage
* ：源图片资源
* @param newWidth
* ：缩放后宽度
* @param newHeight
* ：缩放后高度
* @return
*/
public static Bitmap zipImage(Bitmap bgimage, double newWidth,
double newHeight) {
// 获取这个图片的宽和高
float width = bgimage.getWidth();
float height = bgimage.getHeight();
// 创建操作图片用的matrix对象
Matrix matrix = new Matrix();
// 计算宽高缩放率
float scaleWidth = ((float) newWidth) / width;
float scaleHeight = ((float) newHeight) / height;
// 缩放图片动作
matrix.postScale(scaleWidth, scaleHeight);
Bitmap bitmap = Bitmap.createBitmap(bgimage, 0, 0, (int) width,
(int) height, matrix, true);
return bitmap;
}
/**
* @author sunglasses
* @category 图片加载效果
* @param imageView
* @param bitmap
*/
public static void fadeInDisplay(ImageView imageView, Bitmap bitmap) {//目前流行的渐变效果
final TransitionDrawable transitionDrawable = new TransitionDrawable(
new Drawable[] { TRANSPARENT_DRAWABLE,
new BitmapDrawable(imageView.getResources(), bitmap) });
imageView.setImageDrawable(transitionDrawable);
transitionDrawable.startTransition(500);
}
private static final ColorDrawable TRANSPARENT_DRAWABLE = new ColorDrawable(
android.R.color.transparent);
}
源码下载地址：http://download.csdn.net/detail/anddroid_lanyan/8807533
原文地址：http://blog.csdn.net/anddroid_lanyan/article/details/46502405
