自定义圆形图片

===============MainActivity==================

MainActivity里什么都不用写

==========自定义一个类===========

package com.hf.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 RoundImageView extends ImageView {


public RoundImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}


public RoundImageView(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}


public RoundImageView(Context context) {
super(context);
// TODO Auto-generated constructor stub
}


@Override
protected 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;
}




}

==和上面一起，以防万一（不用写）===

1. //////////////////////////////////////////////以防万一/////////////////////////////////////////////////////////////  
2. if(drawable instanceof BitmapDrawable){           
3. b = ((BitmapDrawable)drawable).getBitmap();  
4. }  
5.   
6.   
7.   
8.   
9.   
10.   
11. ///////////////////////////不相关的  viewpager冲突、、、、、、、、、、、、、、、、、、、  
12. // 瑙ｅ喅ViewPager婊戝姩鐨勬晥鏋�  
13.   
14. launch_vp.setOnTouchListener(new OnTouchListener() {  
15. @Override  
16. public boolean onTouch(View v, MotionEvent event) {  
17. if (event.getAction() == MotionEvent.ACTION_UP) {  
18. launch_vp.requestDisallowInterceptTouchEvent(false);  
19. } else {  
20. launch_vp.requestDisallowInterceptTouchEvent(true);  
21. }  
22. return false;  
23.   
24.   
25. }  
26. });  

================布局activity_main===========

自定义控件

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.hf.Circlephoto.MainActivity" >


    <com.hf.view.RoundImageView
        android:id="@+id/iv"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:src="@drawable/zzz" />


</RelativeLayout>