Canvase 绘制圆图，用于请求网络数据

来源：互联网发布：java final修饰数组编辑：程序博客网时间：2024/06/03 18:43
自定义MyImageView类，继承ImageView
package com.bwie.test.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.PorterDuff.Mode;import android.graphics.PorterDuffXfermode;import android.graphics.Rect;import android.graphics.drawable.BitmapDrawable;import android.graphics.drawable.Drawable;import android.util.AttributeSet;import android.widget.ImageView;public class MyImageView extends ImageView {public MyImageView(Context context, AttributeSet attrs, int defStyleAttr) {    super(context, attrs, defStyleAttr);}public MyImageView(Context context, AttributeSet attrs) {    super(context, attrs);}public MyImageView(Context context) {    super(context);}@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {    setMeasuredDimension(100, 100);}@Overrideprotected void onDraw(Canvas canvas) {    Drawable drawable = getDrawable();      if (drawable == null) {          return;      }      if (getWidth() == 0 || getHeight() == 0) {          return;       }      Bitmap b =  ((BitmapDrawable)drawable).getBitmap();      if(null == b)      {          return;      }      Bitmap bitmap = b.copy(Bitmap.Config.ARGB_8888, true);      int w = getWidth(), h = getHeight();      Bitmap roundBitmap =  getCroppedBitmap(bitmap, w);      canvas.drawBitmap(roundBitmap, 0,0, null);  }  public static Bitmap getCroppedBitmap(Bitmap bmp, int radius) {      Bitmap sbmp;      if(bmp.getWidth() != radius || bmp.getHeight() != radius)          sbmp = Bitmap.createScaledBitmap(bmp, radius, radius, false);      else          sbmp = bmp;      Bitmap output = Bitmap.createBitmap(sbmp.getWidth(),              sbmp.getHeight(), Config.ARGB_8888);      Canvas canvas = new Canvas(output);      final int color = 0xffa19774;      final Paint paint = new Paint();      final Rect rect = new Rect(0, 0, sbmp.getWidth(), sbmp.getHeight());      paint.setAntiAlias(true);      paint.setFilterBitmap(true);      paint.setDither(true);      canvas.drawARGB(0, 0, 0, 0);      paint.setColor(Color.parseColor("#BAB399"));      canvas.drawCircle(sbmp.getWidth() / 2+0.7f, sbmp.getHeight() / 2+0.7f,              sbmp.getWidth() / 2+0.1f, paint);      paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));      canvas.drawBitmap(sbmp, rect, rect, paint);      return output;  }
}
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