package com.xiaoniu.finance.widget;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView;
/**
* 使用方式
* <com.xiaoniu.finance.widget.XNRoundRectImageView
* android:id="@+id/image"
* android:layout_width="250dp"
* android:layout_height="80dp"
* android:src="@drawable/lx2"
* />
* <p>
* 描述: 圆角图片控件
* 作者: 陈真
* 日期: 2017/11/10
*/
public class XNRoundRectImageView extends ImageView {
private Paint paint;
private int mRoundPx;
public XNRoundRectImageView(Context context) {
this(context, null);
}
public XNRoundRectImageView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public XNRoundRectImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
paint = new Paint();
}
public void setImageRound(int roundPx){
this.mRoundPx = roundPx;
this.invalidate();
}
/**
* 绘制圆角矩形图片
*
* @author caizhiming
*/
@Override
protected void onDraw(Canvas canvas) {
Drawable drawable = getDrawable();
if (null != drawable) {
Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
Bitmap b = getRoundBitmap(bitmap, mRoundPx);
final Rect rectSrc = new Rect(0, 0, b.getWidth(), b.getHeight());
final Rect rectDest = new Rect(0, 0, getWidth(), getHeight());
paint.reset();
canvas.drawBitmap(b, rectSrc, rectDest, paint);
} else {
super.onDraw(canvas);
}
}
/**
* 获取圆角矩形图片方法
*
* @param bitmap
* @param roundPx,一般设置成14
* @return Bitmap
* @author caizhiming
*/
private Bitmap getRoundBitmap(Bitmap bitmap, int roundPx) {
Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),
bitmap.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final int color = 0xff424242;
final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
final RectF rectF = new RectF(rect);
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
int x = bitmap.getWidth();
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);
return output;
}
}
圆角图片展示控件
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转载自blog.csdn.net/chenzhen200638/article/details/78497047
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