裁剪圓形圖片的自定義控件

package com.momo2.momo2.utils;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.RectF;
import android.util.AttributeSet;

/**
 * 圓角頭像工具類2
 * @author Administrator
 *
 */
public class CircularImage extends MaskedImage {  
    public CircularImage(Context paramContext) {  
        super(paramContext);  
    }  
  
    public CircularImage(Context paramContext, AttributeSet paramAttributeSet) {  
        super(paramContext, paramAttributeSet);  
    }  
  
    public CircularImage(Context paramContext, AttributeSet paramAttributeSet, int paramInt) {  
        super(paramContext, paramAttributeSet, paramInt);  
    }  
  
    public Bitmap createMask() {  
        int i = getWidth();  
        int j = getHeight();  
        Bitmap.Config localConfig = Bitmap.Config.ARGB_8888;  
        Bitmap localBitmap = Bitmap.createBitmap(i, j, localConfig);  
        Canvas localCanvas = new Canvas(localBitmap);  
        Paint localPaint = new Paint(1);  
        localPaint.setColor(-16777216);  
        float f1 = getWidth();  
        float f2 = getHeight();  
        RectF localRectF = new RectF(0.0F, 0.0F, f1, f2);  
        localCanvas.drawOval(localRectF, localPaint);  
        return localBitmap;  
    }  
}

使用的時候這樣使用：

<com.momo2.momo2.utils.CircularImage
            android:id="@+id/im_head"
            android:layout_width="50dp"
            android:layout_height="50dp"
            android:layout_alignParentRight="true"
            android:layout_centerVertical="true"
            android:layout_marginRight="25dp"
            android:background="@drawable/btn_head" />