android 圆头像

通过自定义ImageView 实现

package com.example.yueyundong1.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;

//圆形ImageView 参考：http://stackoverflow.com/questions/16208365/create-a-circular-image-view-in-android#

public class RoundedImageView extends ImageView {

public RoundedImageView(Context context) {

super(context);

}

public RoundedImageView(Context context, AttributeSet attrs) {

super(context, attrs);

}

public RoundedImageView(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;

}

Bitmap b = ((BitmapDrawable) drawable).getBitmap();

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;

}

}

xml文件中引用:

<com.example.yueyundong1.view.RoundedImageView android:id="@+id/image_camera"

android:layout_width="70dp"

android:layout_height="70dp"

android:layout_centerVertical="true"

android:layout_marginLeft="30dp"

android:layout_alignParentLeft="true"

android:src="@drawable/register_camera"/>

参考：http://stackoverflow.com/questions/16208365/create-a-circular-image-view-in-android#