自定义圆形ImageView-简单

时间:2021-08-01 16:02:52

布局

<com.libin.ziding.MyImageView1
android:id="@+id/i_image"
android:layout_width="200dp"
android:layout_height="200dp"
android:src="@drawable/ph5"
imagecontrol:border_inside_color="#bc0978"
imagecontrol:border_outside_color="#ba3456"
imagecontrol:border_thickness="1dp" />

自定义的圆形Imageview
三个构造方法必须写,不然,有可能会出错

public class MyImageView1 extends ImageView {
private Paint paint;

public MyImageView1(Context context) {
this(context, null);
}

public MyImageView1(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}

public MyImageView1(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
paint = new Paint();

}

/**
* * 绘制圆形图片
*
* @author caizhiming
*/

@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;
}
}