1.在自己MainActivity所在包下创建CircleImageView.class文件
package 自己包名; 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.ColorFilter;
import android.graphics.Matrix;
import android.graphics.Outline;
import android.graphics.Paint;
import android.graphics.Rect;
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.net.Uri;
import android.os.Build;
import android.support.annotation.ColorInt;
import android.support.annotation.ColorRes;
import android.support.annotation.DrawableRes;
import android.support.annotation.RequiresApi;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewOutlineProvider;
import android.widget.ImageView; 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_CIRCLE_BACKGROUND_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 mCircleBackgroundPaint = new Paint(); private int mBorderColor = DEFAULT_BORDER_COLOR;
private int mBorderWidth = DEFAULT_BORDER_WIDTH;
private int mCircleBackgroundColor = DEFAULT_CIRCLE_BACKGROUND_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 boolean mDisableCircularTransformation; 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_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); // Look for deprecated civ_fill_color if civ_circle_background_color is not set
if (a.hasValue(R.styleable.CircleImageView_civ_circle_background_color)) {
mCircleBackgroundColor = a.getColor(R.styleable.CircleImageView_civ_circle_background_color,
DEFAULT_CIRCLE_BACKGROUND_COLOR);
} else if (a.hasValue(R.styleable.CircleImageView_civ_fill_color)) {
mCircleBackgroundColor = a.getColor(R.styleable.CircleImageView_civ_fill_color,
DEFAULT_CIRCLE_BACKGROUND_COLOR);
} a.recycle(); init();
} private void init() {
super.setScaleType(SCALE_TYPE);
mReady = true; if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
setOutlineProvider(new OutlineProvider());
} 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 (mDisableCircularTransformation) {
super.onDraw(canvas);
return;
} if (mBitmap == null) {
return;
} if (mCircleBackgroundColor != Color.TRANSPARENT) {
canvas.drawCircle(mDrawableRect.centerX(), mDrawableRect.centerY(), mDrawableRadius, mCircleBackgroundPaint);
}
canvas.drawCircle(mDrawableRect.centerX(), mDrawableRect.centerY(), mDrawableRadius, mBitmapPaint);
if (mBorderWidth > 0) {
canvas.drawCircle(mBorderRect.centerX(), mBorderRect.centerY(), mBorderRadius, mBorderPaint);
}
} @Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
setup();
} @Override
public void setPadding(int left, int top, int right, int bottom) {
super.setPadding(left, top, right, bottom);
setup();
} @Override
public void setPaddingRelative(int start, int top, int end, int bottom) {
super.setPaddingRelative(start, top, end, bottom);
setup();
} public int getBorderColor() {
return mBorderColor;
} public void setBorderColor(@ColorInt int borderColor) {
if (borderColor == mBorderColor) {
return;
} mBorderColor = borderColor;
mBorderPaint.setColor(mBorderColor);
invalidate();
} /**
* @deprecated Use {@link #setBorderColor(int)} instead
*/
@Deprecated
public void setBorderColorResource(@ColorRes int borderColorRes) {
setBorderColor(getContext().getResources().getColor(borderColorRes));
} public int getCircleBackgroundColor() {
return mCircleBackgroundColor;
} public void setCircleBackgroundColor(@ColorInt int circleBackgroundColor) {
if (circleBackgroundColor == mCircleBackgroundColor) {
return;
} mCircleBackgroundColor = circleBackgroundColor;
mCircleBackgroundPaint.setColor(circleBackgroundColor);
invalidate();
} public void setCircleBackgroundColorResource(@ColorRes int circleBackgroundRes) {
setCircleBackgroundColor(getContext().getResources().getColor(circleBackgroundRes));
} /**
* Return the color drawn behind the circle-shaped drawable.
*
* @return The color drawn behind the drawable
*
* @deprecated Use {@link #getCircleBackgroundColor()} instead.
*/
@Deprecated
public int getFillColor() {
return getCircleBackgroundColor();
} /**
* Set a color to be drawn behind the circle-shaped drawable. Note that
* this has no effect if the drawable is opaque or no drawable is set.
*
* @param fillColor The color to be drawn behind the drawable
*
* @deprecated Use {@link #setCircleBackgroundColor(int)} instead.
*/
@Deprecated
public void setFillColor(@ColorInt int fillColor) {
setCircleBackgroundColor(fillColor);
} /**
* Set a color to be drawn behind the circle-shaped drawable. Note that
* this has no effect if the drawable is opaque or no drawable is set.
*
* @param fillColorRes The color resource to be resolved to a color and
* drawn behind the drawable
*
* @deprecated Use {@link #setCircleBackgroundColorResource(int)} instead.
*/
@Deprecated
public void setFillColorResource(@ColorRes int fillColorRes) {
setCircleBackgroundColorResource(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();
} public boolean isDisableCircularTransformation() {
return mDisableCircularTransformation;
} public void setDisableCircularTransformation(boolean disableCircularTransformation) {
if (mDisableCircularTransformation == disableCircularTransformation) {
return;
} mDisableCircularTransformation = disableCircularTransformation;
initializeBitmap();
} @Override
public void setImageBitmap(Bitmap bm) {
super.setImageBitmap(bm);
initializeBitmap();
} @Override
public void setImageDrawable(Drawable drawable) {
super.setImageDrawable(drawable);
initializeBitmap();
} @Override
public void setImageResource(@DrawableRes int resId) {
super.setImageResource(resId);
initializeBitmap();
} @Override
public void setImageURI(Uri uri) {
super.setImageURI(uri);
initializeBitmap();
} @Override
public void setColorFilter(ColorFilter cf) {
if (cf == mColorFilter) {
return;
} mColorFilter = cf;
applyColorFilter();
invalidate();
} @Override
public ColorFilter getColorFilter() {
return mColorFilter;
} private void applyColorFilter() {
if (mBitmapPaint != null) {
mBitmapPaint.setColorFilter(mColorFilter);
}
} 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 initializeBitmap() {
if (mDisableCircularTransformation) {
mBitmap = null;
} else {
mBitmap = getBitmapFromDrawable(getDrawable());
}
setup();
} 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); mCircleBackgroundPaint.setStyle(Paint.Style.FILL);
mCircleBackgroundPaint.setAntiAlias(true);
mCircleBackgroundPaint.setColor(mCircleBackgroundColor); mBitmapHeight = mBitmap.getHeight();
mBitmapWidth = mBitmap.getWidth(); mBorderRect.set(calculateBounds());
mBorderRadius = Math.min((mBorderRect.height() - mBorderWidth) / 2.0f, (mBorderRect.width() - mBorderWidth) / 2.0f); mDrawableRect.set(mBorderRect);
if (!mBorderOverlay && mBorderWidth > 0) {
mDrawableRect.inset(mBorderWidth - 1.0f, mBorderWidth - 1.0f);
}
mDrawableRadius = Math.min(mDrawableRect.height() / 2.0f, mDrawableRect.width() / 2.0f); applyColorFilter();
updateShaderMatrix();
invalidate();
} private RectF calculateBounds() {
int availableWidth = getWidth() - getPaddingLeft() - getPaddingRight();
int availableHeight = getHeight() - getPaddingTop() - getPaddingBottom(); int sideLength = Math.min(availableWidth, availableHeight); float left = getPaddingLeft() + (availableWidth - sideLength) / 2f;
float top = getPaddingTop() + (availableHeight - sideLength) / 2f; return new RectF(left, top, left + sideLength, top + sideLength);
} 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);
} @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
private class OutlineProvider extends ViewOutlineProvider { @Override
public void getOutline(View view, Outline outline) {
Rect bounds = new Rect();
mBorderRect.roundOut(bounds);
outline.setRoundRect(bounds, bounds.width() / 2.0f);
} } }
2.在values文件夹下创建此xml文件
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="CircleImageView">
<attr name="civ_border_width" format="dimension" />
<attr name="civ_border_color" format="color" />
<attr name="civ_border_overlay" format="boolean" />
<!-- {@deprecated Use civ_circlebackground_color instead.} -->
<attr name="civ_fill_color" format="color" />
<attr name="civ_circle_background_color" format="color" />
</declare-styleable>
</resources>