package com.view.drop; 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.RectF;
import android.graphics.Shader;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView; /**
* Copyright 2014 Henning Dodenhof
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*
*/
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 = 1; private static final int DEFAULT_BORDER_WIDTH = 0;
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; public CircleImageView(Context context) {
super(context);
} public CircleImageView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
} public CircleImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
super.setScaleType(SCALE_TYPE); 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(); 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
protected void onDraw(Canvas canvas) {
if (getDrawable() == null) {
return;
} canvas.drawCircle(getWidth() / 2, getHeight() / 2, mDrawableRadius,
mBitmapPaint);
if (mBorderWidth != 0) {
canvas.drawCircle(getWidth() / 2, getHeight() / 2, mBorderRadius,
mBorderPaint);
}
} @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;
} 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();
} 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); 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);
} }