轉自：http://www.2cto.com/kf/201504/388741.html
《Android圓形頭像圖Circle ImageView》
需要處理的原始圖（pic）：
使用CircleImageView處理後的圖（作爲頭像）：
現在很多的應用都有設置頭像的功能，如QQ、微信、微博等。頭像有標準的四方形，也有圓形（如QQ）。現在結合他人的代碼加以修改，給出一個以原始圖形中心爲原點，修剪圖片爲頭像的工具類，此類
可以直接在佈局文件中加載使用，比如：
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<relativelayout
android:layout_height="match_parent"
android:layout_width="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"> <zhangphil.circle.circleimageview
android:id="@+id/civ"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:src="@drawable/pic"></zhangphil.circle.circleimageview></relativelayout> |
CircleImageView.java的完整源代碼：
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package
zhangphil.circle;import
android.content.Context;import
android.content.res.TypedArray;import
android.graphics.Bitmap;import
android.graphics.BitmapShader;import
android.graphics.Canvas;import
android.graphics.Color;import
android.graphics.Matrix;import
android.graphics.Paint;import
android.graphics.Paint.Align;import
android.graphics.Rect;import
android.graphics.RectF;import
android.graphics.Shader;import
android.graphics.SweepGradient;import
android.graphics.drawable.BitmapDrawable;import
android.graphics.drawable.ColorDrawable;import
android.graphics.drawable.Drawable;import
android.net.Uri;import
android.text.TextPaint;import
android.util.AttributeSet;import
android.util.FloatMath;import
android.widget.ImageView;/** *
@author Phil * */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; //
圓形邊框的厚度默認值。 //
如果是0，則沒有天藍色漸變的邊框。 private
static
final
int
DEFAULT_BORDER_WIDTH = 20; private
static
final
int
DEFAULT_BORDER_COLOR = Color.BLACK; 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
int
mBorderColor = DEFAULT_BORDER_COLOR; private
int
mBorderWidth = DEFAULT_BORDER_WIDTH; private
Bitmap mBitmap; private
BitmapShader mBitmapShader; private
int
mBitmapWidth; private
int
mBitmapHeight; private
float
mDrawableRadius; private
float
mBorderRadius; private
boolean
mReady; private
boolean
mSetupPending; private
final
Paint mFlagBackgroundPaint = new
Paint(); private
final
TextPaint mFlagTextPaint = new
TextPaint(); private
String mFlagText; private
boolean
mShowFlag = false; private
Rect mFlagTextBounds = new
Rect(); Shader
mSweepGradient = null; public
CircleImageView(Context context) { super(context); init(); } public
CircleImageView(Context context, AttributeSet attrs) { this(context,
attrs, 0); } public
CircleImageView(Context context, AttributeSet attrs, int
defStyle) { super(context,
attrs, defStyle); //
TypedArray a = context.obtainStyledAttributes(attrs, //
R.styleable.CircleImageView, defStyle, 0); // //
mBorderWidth = //
a.getDimensionPixelSize(R.styleable.CircleImageView_border_width, //
DEFAULT_BORDER_WIDTH); //
mBorderColor = a.getColor(R.styleable.CircleImageView_border_color, //
DEFAULT_BORDER_COLOR); // //
a.recycle(); init(); } private
void
init() { super.setScaleType(SCALE_TYPE); mReady
= true; if
(mSetupPending) { setup(); mSetupPending
= false; } } @Override public
ScaleType getScaleType() { return
SCALE_TYPE; } @Override public
void
setScaleType(ScaleType scaleType) { if
(scaleType != SCALE_TYPE) { throw
new
IllegalArgumentException(String.format( "ScaleType
%s not supported.",
scaleType)); } } @Override public
void
setAdjustViewBounds(boolean
adjustViewBounds) { if
(adjustViewBounds) { throw
new
IllegalArgumentException( "adjustViewBounds
not supported."); } } @Override protected
void
onDraw(Canvas canvas) { if
(getDrawable() == null)
{ return; } canvas.drawCircle(getWidth()
/ 2,
getHeight() / 2,
mDrawableRadius, mBitmapPaint); if
(mBorderWidth != 0)
{ canvas.save(); canvas.rotate(20,
getWidth() / 2,
getHeight() / 2); canvas.drawCircle(getWidth()
/ 2,
getHeight() / 2,
mBorderRadius, mBorderPaint); canvas.restore(); } if
(mShowFlag && mFlagText != null)
{ canvas.drawArc(mBorderRect,
40,
100,
false,
mFlagBackgroundPaint); mFlagTextPaint.getTextBounds(mFlagText,
0,
mFlagText.length(), mFlagTextBounds); canvas.drawText(mFlagText,
getWidth() / 2, (3
+ FloatMath.cos((float)
(Math.PI * 5
/ 18))) *
getHeight() / 4
+ mFlagTextBounds.height() / 3, mFlagTextPaint); } } @Override protected
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
int
getBorderWidth() { return
mBorderWidth; } /** *
@param borderWidth *
圓形的邊框厚度。 */ public
void
setBorderWidth(int
borderWidth) { if
(borderWidth == mBorderWidth) { return; } mBorderWidth
= borderWidth; setup(); } @Override public
void
setImageBitmap(Bitmap bm) { super.setImageBitmap(bm); mBitmap
= bm; setup(); } @Override public
void
setImageDrawable(Drawable drawable) { super.setImageDrawable(drawable); mBitmap
= getBitmapFromDrawable(drawable); setup(); } @Override public
void
setImageResource(int
resId) { super.setImageResource(resId); mBitmap
= getBitmapFromDrawable(getDrawable()); setup(); } @Override public
void
setImageURI(Uri uri) { super.setImageURI(uri); mBitmap
= getBitmapFromDrawable(getDrawable()); setup(); } 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
(OutOfMemoryError e) { return
null; } } private
void
setup() { if
(!mReady) { mSetupPending
= true; return; } if
(mBitmap == null)
{ 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); mBitmapHeight
= mBitmap.getHeight(); mBitmapWidth
= mBitmap.getWidth(); mBorderRect.set(0,
0,
getWidth(), getHeight()); mBorderRadius
= Math.min((mBorderRect.height() - mBorderWidth) / 2, (mBorderRect.width()
- mBorderWidth) / 2); mDrawableRect.set(mBorderWidth,
mBorderWidth, mBorderRect.width() -
mBorderWidth, mBorderRect.height() - mBorderWidth); mDrawableRadius
= Math.min(mDrawableRect.height() / 2, mDrawableRect.width()
/ 2); mFlagBackgroundPaint.setColor(Color.BLACK
& 0x66FFFFFF); mFlagBackgroundPaint.setFlags(TextPaint.ANTI_ALIAS_FLAG); mFlagTextPaint.setFlags(TextPaint.ANTI_ALIAS_FLAG); mFlagTextPaint.setTextAlign(Align.CENTER); mFlagTextPaint.setColor(Color.WHITE); mFlagTextPaint .setTextSize(getResources().getDisplayMetrics().density
* 18); mSweepGradient
= new
SweepGradient(getWidth() / 2,
getHeight() / 2, new
int[]
{ Color.rgb(255,
255,
255),
Color.rgb(1,
209,
255)
}, null); mBorderPaint.setShader(mSweepGradient); 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)
+ mBorderWidth, (int)
(dy + 0.5f)
+ mBorderWidth); mBitmapShader.setLocalMatrix(mShaderMatrix); } public
void
setShowFlag(boolean
show) { mShowFlag
= show; invalidate(); } public
void
setFlagText(String text) { mFlagText
= text; invalidate(); }} |