原始圖片:html
核心代碼:java
[java] view plaincopyandroid
/** canvas
* 圓形ImageView,可設置最多兩個寬度不一樣且顏色不一樣的圓形邊框。 ide
* 佈局
* @author Alan this
*/ spa
public class RoundImageView extends ImageView { .net
private int mBorderThickness = 0; code
private Context mContext;
private int defaultColor = 0xFFFFFFFF;
// 若是隻有其中一個有值,則只畫一個圓形邊框
private int mBorderOutsideColor = 0;
private int mBorderInsideColor = 0;
// 控件默認長、寬
private int defaultWidth = 0;
private int defaultHeight = 0;
public RoundImageView(Context context) {
super(context);
mContext = context;
}
public RoundImageView(Context context, AttributeSet attrs) {
super(context, attrs);
mContext = context;
setCustomAttributes(attrs);
}
public RoundImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mContext = context;
setCustomAttributes(attrs);
}
private void setCustomAttributes(AttributeSet attrs) {
TypedArray a = mContext.obtainStyledAttributes(attrs,
R.styleable.roundedimageview);
mBorderThickness = a.getDimensionPixelSize(
R.styleable.roundedimageview_border_thickness, 0);
mBorderOutsideColor = a
.getColor(R.styleable.roundedimageview_border_outside_color,
defaultColor);
mBorderInsideColor = a.getColor(
R.styleable.roundedimageview_border_inside_color, defaultColor);
}
@Override
protected void onDraw(Canvas canvas) {
Drawable drawable = getDrawable();
if (drawable == null) {
return;
}
if (getWidth() == 0 || getHeight() == 0) {
return;
}
this.measure(0, 0);
if (drawable.getClass() == NinePatchDrawable.class)
return;
Bitmap b = ((BitmapDrawable) drawable).getBitmap();
Bitmap bitmap = b.copy(Bitmap.Config.ARGB_8888, true);
if (defaultWidth == 0) {
defaultWidth = getWidth();
}
if (defaultHeight == 0) {
defaultHeight = getHeight();
}
// 保證從新讀取圖片後不會由於圖片大小而改變控件寬、高的大小(針對寬、高爲wrap_content佈局的imageview,但會致使margin無效)
// if (defaultWidth != 0 && defaultHeight != 0) {
// LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
// defaultWidth, defaultHeight);
// setLayoutParams(params);
// }
int radius = 0;
if (mBorderInsideColor != defaultColor
&& mBorderOutsideColor != defaultColor) {// 定義畫兩個邊框,分別爲外圓邊框和內圓邊框
radius = (defaultWidth < defaultHeight ? defaultWidth
: defaultHeight) / 2 - 2 * mBorderThickness;
// 畫內圓
drawCircleBorder(canvas, radius + mBorderThickness / 2,
mBorderInsideColor);
// 畫外圓
drawCircleBorder(canvas, radius + mBorderThickness
+ mBorderThickness / 2, mBorderOutsideColor);
} else if (mBorderInsideColor != defaultColor
&& mBorderOutsideColor == defaultColor) {// 定義畫一個邊框
radius = (defaultWidth < defaultHeight ? defaultWidth
: defaultHeight) / 2 - mBorderThickness;
drawCircleBorder(canvas, radius + mBorderThickness / 2,
mBorderInsideColor);
} else if (mBorderInsideColor == defaultColor
&& mBorderOutsideColor != defaultColor) {// 定義畫一個邊框
radius = (defaultWidth < defaultHeight ? defaultWidth
: defaultHeight) / 2 - mBorderThickness;
drawCircleBorder(canvas, radius + mBorderThickness / 2,
mBorderOutsideColor);
} else {// 沒有邊框
radius = (defaultWidth < defaultHeight ? defaultWidth
: defaultHeight) / 2;
}
Bitmap roundBitmap = getCroppedRoundBitmap(bitmap, radius);
canvas.drawBitmap(roundBitmap, defaultWidth / 2 - radius, defaultHeight
/ 2 - radius, null);
}
/**
* 獲取裁剪後的圓形圖片
*
* @param radius
* 半徑
*/
public Bitmap getCroppedRoundBitmap(Bitmap bmp, int radius) {
Bitmap scaledSrcBmp;
int diameter = radius * 2;
// 爲了防止寬高不相等,形成圓形圖片變形,所以截取長方形中處於中間位置最大的正方形圖片
int bmpWidth = bmp.getWidth();
int bmpHeight = bmp.getHeight();
int squareWidth = 0, squareHeight = 0;
int x = 0, y = 0;
Bitmap squareBitmap;
if (bmpHeight > bmpWidth) {// 高大於寬
squareWidth = squareHeight = bmpWidth;
x = 0;
y = (bmpHeight - bmpWidth) / 2;
// 截取正方形圖片
squareBitmap = Bitmap.createBitmap(bmp, x, y, squareWidth,
squareHeight);
} else if (bmpHeight < bmpWidth) {// 寬大於高
squareWidth = squareHeight = bmpHeight;
x = (bmpWidth - bmpHeight) / 2;
y = 0;
squareBitmap = Bitmap.createBitmap(bmp, x, y, squareWidth,
squareHeight);
} else {
squareBitmap = bmp;
}
if (squareBitmap.getWidth() != diameter
|| squareBitmap.getHeight() != diameter) {
scaledSrcBmp = Bitmap.createScaledBitmap(squareBitmap, diameter,
diameter, true);
} else {
scaledSrcBmp = squareBitmap;
}
Bitmap output = Bitmap.createBitmap(scaledSrcBmp.getWidth(),
scaledSrcBmp.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(output);
Paint paint = new Paint();
Rect rect = new Rect(0, 0, scaledSrcBmp.getWidth(),
scaledSrcBmp.getHeight());
paint.setAntiAlias(true);
paint.setFilterBitmap(true);
paint.setDither(true);
canvas.drawARGB(0, 0, 0, 0);
canvas.drawCircle(scaledSrcBmp.getWidth() / 2,
scaledSrcBmp.getHeight() / 2, scaledSrcBmp.getWidth() / 2,
paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(scaledSrcBmp, rect, rect, paint);
// bitmap回收(recycle致使在佈局文件XML看不到效果)
// bmp.recycle();
// squareBitmap.recycle();
// scaledSrcBmp.recycle();
bmp = null;
squareBitmap = null;
scaledSrcBmp = null;
return output;
}
/**
* 邊緣畫圓
*/
private void drawCircleBorder(Canvas canvas, int radius, int color) {
Paint paint = new Paint();
/* 去鋸齒 */
paint.setAntiAlias(true);
paint.setFilterBitmap(true);
paint.setDither(true);
paint.setColor(color);
/* 設置paint的 style 爲STROKE:空心 */
paint.setStyle(Paint.Style.STROKE);
/* 設置paint的外框寬度 */
paint.setStrokeWidth(mBorderThickness);
canvas.drawCircle(defaultWidth / 2, defaultHeight / 2, radius, paint);
}
}
佈局文件:
[html] view plaincopy
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:imagecontrol="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#fffffdfa"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_vertical_margin"
android:paddingRight="@dimen/activity_vertical_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<com.alan.roundimageview.RoundImageView
android:id="@+id/roundImage_network"
android:layout_width="60dp"
android:layout_height="60dp"
android:src="@drawable/default_portrait" />
<com.alan.roundimageview.RoundImageView
android:id="@+id/roundImage_one_border"
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
imagecontrol:border_outside_color="#FFFF0000"
imagecontrol:border_thickness="2dp"
android:src="@drawable/default_portrait" />
<com.alan.roundimageview.RoundImageView
android:id="@+id/roundImage_two_border"
android:layout_width="120dp"
android:layout_height="120dp"
android:scaleType="centerCrop"
imagecontrol:border_inside_color="#fff7f2e9"
imagecontrol:border_outside_color="#ffd5d1c8"
imagecontrol:border_thickness="2dp"
android:src="@drawable/default_portrait"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:orientation="horizontal" >
<com.alan.roundimageview.RoundImageView
android:layout_width="60dp"
android:layout_height="60dp"
android:src="@drawable/default_portrait" />
<com.alan.roundimageview.RoundImageView
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
imagecontrol:border_outside_color="#FFFF0000"
imagecontrol:border_thickness="2dp"
android:src="@drawable/default_portrait"/>
<com.alan.roundimageview.RoundImageView
android:layout_width="120dp"
android:layout_height="120dp"
android:scaleType="centerCrop"
imagecontrol:border_inside_color="#fff7f2e9"
imagecontrol:border_outside_color="#ffd5d1c8"
imagecontrol:border_thickness="2dp"
android:src="@drawable/default_portrait" />
</LinearLayout>
</LinearLayout>
arrts.xml文件
<declare-styleable name="roundedimageview">
<attr name="border_thickness" format="dimension" />
<attr name="border_outside_color" format="color" />
<attr name="border_inside_color" format="color" />
</declare-styleable>