forked from kairui467/CircleImageViewWithBorder
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathCircleImageView.java
More file actions
107 lines (81 loc) · 3.34 KB
/
CircleImageView.java
File metadata and controls
107 lines (81 loc) · 3.34 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
package com.scb.administrator.a;
/**
* Created by Administrator on 2015/6/5 0005.
*/
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 CircleImageView extends ImageView{
public CircleImageView(Context context) {
super(context);
}
public CircleImageView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public CircleImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
protected void onDraw(Canvas canvas){
Paint paint = new Paint();
paint.setAntiAlias(true); //防止边缘的锯齿
paint.setColor(Color.WHITE); //这里的颜色决定了边缘的颜色
Drawable drawable = getDrawable();
if(drawable == null){
return ;
}
if(getWidth() == 0 || getHeight() == 0){
return ;
}
//先类型转换
Bitmap b = ((BitmapDrawable)drawable).getBitmap();
//creates a mutable copy of the image using the option specified.
Bitmap bitmap = b.copy(Bitmap.Config.ARGB_8888, true);
int w = getWidth() ;
int h = getHeight() ;
//圆形ImageView的半径为布局中的ImageView定义大小
Bitmap roundBitmap = getCroppedBitmap(bitmap, w);
canvas.drawARGB(0, 0, 0, 0);
//这才开始画圆
canvas.drawCircle(w / 2, h / 2, w / 2 , paint);
//x0，y0 距离左边为0 ，距离上边为0
canvas.drawBitmap(roundBitmap, 0, 0, null);
}
public static Bitmap getCroppedBitmap(Bitmap bmp, int radius) {
Bitmap sbmp;
//以宽为标准
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);
//output不仅起到设置画布大小的作用，而是在output上画画。最后返回output
Canvas canvas = new Canvas(output);
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, sbmp.getWidth(), sbmp.getHeight());
paint.setAntiAlias(true);
paint.setFilterBitmap(true);
//图像的抖动处理,保持好的图片效果
paint.setDither(true);
// 把画笔设置为透明
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(Color.WHITE);
//paint.setStyle(Paint.Style.FILL);画笔默认的style
//第一个参数为圆心x坐标，二为圆心的y坐标，第三个参数为半径减去的数值为白边的宽度.
//这里剪下的是图片的半径。
canvas.drawCircle(sbmp.getWidth() / 2, sbmp.getHeight() / 2, sbmp.getWidth() / 2 - 2, paint);
// 取两层绘制交集。显示前景色。
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(sbmp, rect, rect, paint);
return output;
}
}