绘制圆形图片：登陆头像

标签：imageview   圆形图片   

代码如下：

import android.content.Context;

import android.graphics.Bitmap;

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 CircleImage extends ImageView {

public CircleImage(Context context) {

super(context);

}

public CircleImage(Context context, AttributeSet attrs) {

super(context, attrs);

}

public CircleImage(Context context, AttributeSet attrs, int defStyle) {

super(context, attrs, defStyle);

}

@Override

protected void onDraw(Canvas canvas) {

Drawable drawable = getDrawable();

if (drawable == null) {

return;

}

if (getWidth() == 0 || getHeight() == 0) {

return;

}

BitmapDrawable bd = (BitmapDrawable) drawable;

Bitmap b = bd.getBitmap();

Bitmap bitmap = b.copy(Bitmap.Config.ARGB_8888, true);

Bitmap roundBitmap = getCroppedBitmap(bitmap, getWidth());

canvas.drawBitmap(roundBitmap, 0, 0, null);

}

/*

* 对Bitmap裁剪，使其变成圆形

*/

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(),

Bitmap.Config.ARGB_8888);

final Rect rect = new Rect(0, 0, sbmp.getWidth(), sbmp.getHeight());

Paint paint = new Paint();

paint.setAntiAlias(true);

paint.setFilterBitmap(true);

paint.setDither(true);

paint.setColor(Color.parseColor("#BAB399"));

Canvas c = new Canvas(output);

c.drawARGB(0, 0, 0, 0);

c.drawCircle(sbmp.getWidth() / 2 + 0.7f, sbmp.getHeight() / 2 + 0.7f,

sbmp.getWidth() / 2 + 0.1f, paint);

paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));

c.drawBitmap(sbmp, rect, rect, paint);

return output;

}

}

绘制圆形图片：登陆头像

标签：imageview   圆形图片   

原文地址：http://blog.csdn.net/sweiqin/article/details/45083257