解决CircleImageView不能用Afinal的FinalBitmap加载网络图片问题

相信好多项目中都会用到类似QQ头像的圆形ImageView，最近小编在项目就用到这个圆形的ImageView，于是在网上找到了开源项目CircleImageView。用的时候感觉不错，但是在利用Afinal框架的display方法加载网络图片时，总是显示不出来，甚是苦恼。当然解决问题的最好的办法就是读源码，于是我看一下CircleImageView的源码，发现它需

要一个bitmap通过裁剪显示圆形的，而Afinal框架的display方法则不能提供一个bitmap。这时我就找FinalBitmap有没有提供一个方法返回的是bitmap的，很遗憾没有给我们提供这样的方法。后来我查找ImageLoader框架，发现它给我提供了一个这样的方法loadImageSync，它可以通过URL返回的一个bitmap，再把这个bitmap提供CircleImageView就能很好的显示图片了。但是特别要注意的是，loadImageSync这个方法是同步的，不是异步的，android4.0有个特性，网络操作不能在主线程，意思是这个方法必须要开一个线程操作。不然直接使用会报错的。

这个就是我在CircleImageView中新增的方法

/** * 为圆形Iamge设置IamgeUrl *  * @param url 图片的url */public void setImageURL(final String url) {final Handler handler = new Handler() {@Overridepublic void handleMessage(Message msg) {super.handleMessage(msg);setImageBitmap(bitmap);}};/** * 网络操作相关的子线程 */new Thread(new Runnable() {@Overridepublic void run() {// TODO// 在这里进行 http request.网络请求相关操作Message msg = new Message();bitmap = ImageLoader.getInstance().loadImageSync(url);handler.sendMessage(msg);}}).start();}

修改过后的CircleImageView，可以拿去直接使用了

public class CircleImageView extends ImageView {private static final ScaleType SCALE_TYPE = ScaleType.CENTER_CROP;private static final Bitmap.Config BITMAP_CONFIG = Bitmap.Config.ARGB_8888;private static final int COLORDRAWABLE_DIMENSION = 2;private static final int DEFAULT_BORDER_WIDTH = 0;private static final int DEFAULT_BORDER_COLOR = Color.BLACK;private static final int DEFAULT_FILL_COLOR = Color.TRANSPARENT;private static final boolean DEFAULT_BORDER_OVERLAY = false;private final RectF mDrawableRect = new RectF();private final RectF mBorderRect = new RectF();private final Matrix mShaderMatrix = new Matrix();private final Paint mBitmapPaint = new Paint();private final Paint mBorderPaint = new Paint();private final Paint mFillPaint = new Paint();private int mBorderColor = DEFAULT_BORDER_COLOR;private int mBorderWidth = DEFAULT_BORDER_WIDTH;private int mFillColor = DEFAULT_FILL_COLOR;private Bitmap mBitmap;private BitmapShader mBitmapShader;private int mBitmapWidth;private int mBitmapHeight;private float mDrawableRadius;private float mBorderRadius;private ColorFilter mColorFilter;private boolean mReady;private boolean mSetupPending;private boolean mBorderOverlay;private Context mContext;private Bitmap bitmap = null;public CircleImageView(Context context) {super(context);this.mContext = context;init();}public CircleImageView(Context context, AttributeSet attrs) {this(context, attrs, 0);}public CircleImageView(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);this.mContext = context;TypedArray a = context.obtainStyledAttributes(attrs,R.styleable.CircleImageView, defStyle, 0);mBorderWidth = a.getDimensionPixelSize(R.styleable.CircleImageView_civ_border_width,DEFAULT_BORDER_WIDTH);mBorderColor = a.getColor(R.styleable.CircleImageView_civ_border_color,DEFAULT_BORDER_COLOR);mBorderOverlay = a.getBoolean(R.styleable.CircleImageView_civ_border_overlay,DEFAULT_BORDER_OVERLAY);mFillColor = a.getColor(R.styleable.CircleImageView_civ_fill_color,DEFAULT_FILL_COLOR);a.recycle();init();}private void init() {super.setScaleType(SCALE_TYPE);mReady = true;if (mSetupPending) {setup();mSetupPending = false;}}@Overridepublic ScaleType getScaleType() {return SCALE_TYPE;}@Overridepublic void setScaleType(ScaleType scaleType) {if (scaleType != SCALE_TYPE) {throw new IllegalArgumentException(String.format("ScaleType %s not supported.", scaleType));}}@Overridepublic void setAdjustViewBounds(boolean adjustViewBounds) {if (adjustViewBounds) {throw new IllegalArgumentException("adjustViewBounds not supported.");}}@Overrideprotected void onDraw(Canvas canvas) {if (mBitmap == null) {return;}if (mFillColor != Color.TRANSPARENT) {canvas.drawCircle(getWidth() / 2.0f, getHeight() / 2.0f,mDrawableRadius, mFillPaint);}canvas.drawCircle(getWidth() / 2.0f, getHeight() / 2.0f,mDrawableRadius, mBitmapPaint);if (mBorderWidth != 0) {canvas.drawCircle(getWidth() / 2.0f, getHeight() / 2.0f,mBorderRadius, mBorderPaint);}}@Overrideprotected void onSizeChanged(int w, int h, int oldw, int oldh) {super.onSizeChanged(w, h, oldw, oldh);setup();}public int getBorderColor() {return mBorderColor;}public void setBorderColor(int borderColor) {if (borderColor == mBorderColor) {return;}mBorderColor = borderColor;mBorderPaint.setColor(mBorderColor);invalidate();}public void setBorderColorResource(int borderColorRes) {setBorderColor(getContext().getResources().getColor(borderColorRes));}public int getFillColor() {return mFillColor;}public void setFillColor(int fillColor) {if (fillColor == mFillColor) {return;}mFillColor = fillColor;mFillPaint.setColor(fillColor);invalidate();}public void setFillColorResource(int fillColorRes) {setFillColor(getContext().getResources().getColor(fillColorRes));}public int getBorderWidth() {return mBorderWidth;}public void setBorderWidth(int borderWidth) {if (borderWidth == mBorderWidth) {return;}mBorderWidth = borderWidth;setup();}public boolean isBorderOverlay() {return mBorderOverlay;}public void setBorderOverlay(boolean borderOverlay) {if (borderOverlay == mBorderOverlay) {return;}mBorderOverlay = borderOverlay;setup();}@Overridepublic void setImageBitmap(Bitmap bm) {super.setImageBitmap(bm);mBitmap = bm;setup();}@Overridepublic void setImageDrawable(Drawable drawable) {super.setImageDrawable(drawable);mBitmap = getBitmapFromDrawable(drawable);setup();}@Overridepublic void setImageResource(int resId) {super.setImageResource(resId);mBitmap = getBitmapFromDrawable(getDrawable());setup();}@Overridepublic void setImageURI(Uri uri) {super.setImageURI(uri);mBitmap = uri != null ? getBitmapFromDrawable(getDrawable()) : null;setup();}/** * 为圆形Iamge设置IamgeUrl *  * @param url 图片的url */public void setImageURL(final String url) {final Handler handler = new Handler() {@Overridepublic void handleMessage(Message msg) {super.handleMessage(msg);setImageBitmap(bitmap);}};/** * 网络操作相关的子线程 */new Thread(new Runnable() {@Overridepublic void run() {// TODO// 在这里进行 http request.网络请求相关操作Message msg = new Message();bitmap = ImageLoader.getInstance().loadImageSync(url);handler.sendMessage(msg);}}).start();}@Overridepublic void setColorFilter(ColorFilter cf) {if (cf == mColorFilter) {return;}mColorFilter = cf;mBitmapPaint.setColorFilter(mColorFilter);invalidate();}private Bitmap getBitmapFromDrawable(Drawable drawable) {if (drawable == null) {return null;}if (drawable instanceof BitmapDrawable) {return ((BitmapDrawable) drawable).getBitmap();}try {Bitmap bitmap;if (drawable instanceof ColorDrawable) {bitmap = Bitmap.createBitmap(COLORDRAWABLE_DIMENSION,COLORDRAWABLE_DIMENSION, BITMAP_CONFIG);} else {bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(),drawable.getIntrinsicHeight(), BITMAP_CONFIG);}Canvas canvas = new Canvas(bitmap);drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());drawable.draw(canvas);return bitmap;} catch (Exception e) {e.printStackTrace();return null;}}private void setup() {if (!mReady) {mSetupPending = true;return;}if (getWidth() == 0 && getHeight() == 0) {return;}if (mBitmap == null) {invalidate();return;}mBitmapShader = new BitmapShader(mBitmap, Shader.TileMode.CLAMP,Shader.TileMode.CLAMP);mBitmapPaint.setAntiAlias(true);mBitmapPaint.setShader(mBitmapShader);mBorderPaint.setStyle(Paint.Style.STROKE);mBorderPaint.setAntiAlias(true);mBorderPaint.setColor(mBorderColor);mBorderPaint.setStrokeWidth(mBorderWidth);mFillPaint.setStyle(Paint.Style.FILL);mFillPaint.setAntiAlias(true);mFillPaint.setColor(mFillColor);mBitmapHeight = mBitmap.getHeight();mBitmapWidth = mBitmap.getWidth();mBorderRect.set(0, 0, getWidth(), getHeight());mBorderRadius = Math.min((mBorderRect.height() - mBorderWidth) / 2.0f,(mBorderRect.width() - mBorderWidth) / 2.0f);mDrawableRect.set(mBorderRect);if (!mBorderOverlay) {mDrawableRect.inset(mBorderWidth, mBorderWidth);}mDrawableRadius = Math.min(mDrawableRect.height() / 2.0f,mDrawableRect.width() / 2.0f);updateShaderMatrix();invalidate();}private void updateShaderMatrix() {float scale;float dx = 0;float dy = 0;mShaderMatrix.set(null);if (mBitmapWidth * mDrawableRect.height() > mDrawableRect.width()* mBitmapHeight) {scale = mDrawableRect.height() / (float) mBitmapHeight;dx = (mDrawableRect.width() - mBitmapWidth * scale) * 0.5f;} else {scale = mDrawableRect.width() / (float) mBitmapWidth;dy = (mDrawableRect.height() - mBitmapHeight * scale) * 0.5f;}mShaderMatrix.setScale(scale, scale);mShaderMatrix.postTranslate((int) (dx + 0.5f) + mDrawableRect.left,(int) (dy + 0.5f) + mDrawableRect.top);mBitmapShader.setLocalMatrix(mShaderMatrix);}}

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