有關ImageView的圓角或弧度角設定
阿新 • • 發佈:2019-02-08
import android.graphics.Bitmap.Config; import android.graphics.BitmapFactory; import android.graphics.Canvas; 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.drawable.BitmapDrawable; import android.graphics.drawable.Drawable; import android.graphics.Bitmap; import android.graphics.BitmapShader; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Shader; albumImage.setImageBitmap(bitmap); public static Bitmap getRoundedCornerBitmap(Bitmap bitmap) { 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); final float roundPx = 8; 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; }
package com.pateo.as21.music.activity; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.PorterDuffXfermode; import android.graphics.Rect; import android.graphics.RectF; import android.graphics.Bitmap.Config; import android.graphics.PorterDuff.Mode; /** * @author : * @email * @date : 2012-11-8 * @desc : */ public class BitmapFillet { public static final int ALL = 347120; public static final int TOP = 547120; public static final int LEFT = 647120; public static final int RIGHT = 747120; public static final int BOTTOM = 847120; /** * * 指定圖片的切邊,對圖片進行圓角處理 * @param type 具體參見:{@link BitmapFillet.ALL} , {@link BitmapFillet.TOP} , * {@link BitmapFillet.LEFT} , {@link BitmapFillet.RIGHT} , {@link BitmapFillet.BOTTOM} * @param bitmap 需要被切圓角的圖片 * @param roundPx 要切的畫素大小 * @return * */ public static Bitmap fillet(int type,Bitmap bitmap,int roundPx) { try { // 其原理就是:先建立一個與圖片大小相同的透明的Bitmap畫板 // 然後在畫板上畫出一個想要的形狀的區域。 // 最後把源圖片帖上。 final int width = bitmap.getWidth(); final int height = bitmap.getHeight(); Bitmap paintingBoard = Bitmap.createBitmap(width,height, Config.ARGB_8888); Canvas canvas = new Canvas(paintingBoard); canvas.drawARGB(Color.TRANSPARENT, Color.TRANSPARENT, Color.TRANSPARENT, Color.TRANSPARENT); final Paint paint = new Paint(); paint.setAntiAlias(true); paint.setColor(Color.BLACK); if( TOP == type ){ clipTop(canvas,paint,roundPx,width,height); }else if( LEFT == type ){ clipLeft(canvas,paint,roundPx,width,height); }else if( RIGHT == type ){ clipRight(canvas,paint,roundPx,width,height); }else if( BOTTOM == type ){ clipBottom(canvas,paint,roundPx,width,height); }else{ clipAll(canvas,paint,roundPx,width,height); } paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN)); //帖子圖 final Rect src = new Rect(0, 0, width, height); final Rect dst = src; canvas.drawBitmap(bitmap, src, dst, paint); return paintingBoard; } catch (Exception exp) { return bitmap; } } private static void clipLeft(final Canvas canvas,final Paint paint,int offset,int width,int height){ final Rect block = new Rect(offset,0,width,height); canvas.drawRect(block, paint); final RectF rectF = new RectF(0, 0, offset * 2 , height); canvas.drawRoundRect(rectF, offset, offset, paint); } private static void clipRight(final Canvas canvas,final Paint paint,int offset,int width,int height){ final Rect block = new Rect(0, 0, width-offset, height); canvas.drawRect(block, paint); final RectF rectF = new RectF(width - offset * 2, 0, width , height); canvas.drawRoundRect(rectF, offset, offset, paint); } private static void clipTop(final Canvas canvas,final Paint paint,int offset,int width,int height){ final Rect block = new Rect(0, offset, width, height); canvas.drawRect(block, paint); final RectF rectF = new RectF(0, 0, width , offset * 2); canvas.drawRoundRect(rectF, offset, offset, paint); } private static void clipBottom(final Canvas canvas,final Paint paint,int offset,int width,int height){ final Rect block = new Rect(0, 0, width, height - offset); canvas.drawRect(block, paint); final RectF rectF = new RectF(0, height - offset * 2 , width , height); canvas.drawRoundRect(rectF, offset, offset, paint); } private static void clipAll(final Canvas canvas,final Paint paint,int offset,int width,int height){ final RectF rectF = new RectF(0, 0, width , height); canvas.drawRoundRect(rectF, offset, offset, paint); } }
package com.pateo.as21.music.activity.view; import android.content.Context; import android.graphics.Bitmap; import android.graphics.Bitmap.Config; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Path; import android.graphics.PorterDuff; import android.graphics.PorterDuffXfermode; import android.graphics.RectF; import android.util.AttributeSet; import android.widget.ImageView; public class RoundAngleImageView extends ImageView { private Paint paint; private int roundWidth = 15; private int roundHeight = 15; private Paint paint2; public RoundAngleImageView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); init(context, attrs); } public RoundAngleImageView(Context context, AttributeSet attrs) { super(context, attrs); init(context, attrs); } public RoundAngleImageView(Context context) { super(context); init(context, null); } private void init(Context context, AttributeSet attrs) { float density = context.getResources().getDisplayMetrics().density; roundWidth = (int) (roundWidth * density); roundHeight = (int) (roundHeight * density); paint = new Paint(); paint.setColor(Color.WHITE); paint.setAntiAlias(true); paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT)); paint2 = new Paint(); paint2.setXfermode(null); } @Override public void draw(Canvas canvas) { Bitmap bitmap = Bitmap.createBitmap(getWidth(), getHeight(), Config.ARGB_8888); Canvas canvas2 = new Canvas(bitmap); super.draw(canvas2); // drawLiftUp(canvas2); drawRightUp(canvas2); // drawLiftDown(canvas2); // drawRightDown(canvas2); canvas.drawBitmap(bitmap, 0, 0, paint2); bitmap.recycle(); } private void drawLiftUp(Canvas canvas) { Path path = new Path(); path.moveTo(0, roundHeight); path.lineTo(0, 0); path.lineTo(roundWidth, 0); path.arcTo(new RectF( 0, 0, roundWidth*2, roundHeight*2), -90, -90); path.close(); canvas.drawPath(path, paint); } private void drawLiftDown(Canvas canvas) { Path path = new Path(); path.moveTo(0, getHeight()-roundHeight); path.lineTo(0, getHeight()); path.lineTo(roundWidth, getHeight()); path.arcTo(new RectF( 0, getHeight()-roundHeight*2, 0+roundWidth*2, getHeight()), 90, 90); path.close(); canvas.drawPath(path, paint); } private void drawRightDown(Canvas canvas) { Path path = new Path(); path.moveTo(getWidth()-roundWidth, getHeight()); path.lineTo(getWidth(), getHeight()); path.lineTo(getWidth(), getHeight()-roundHeight); path.arcTo(new RectF( getWidth()-roundWidth*2, getHeight()-roundHeight*2, getWidth(), getHeight()), 0, 90); path.close(); canvas.drawPath(path, paint); } private void drawRightUp(Canvas canvas) { Path path = new Path(); path.moveTo(getWidth(), roundHeight); path.lineTo(getWidth(), 0); path.lineTo(getWidth()-roundWidth, 0); path.arcTo(new RectF( getWidth()-roundWidth*2, 0, getWidth(), 0+roundHeight*2), -90, 90); path.close(); canvas.drawPath(path, paint); } }