Android实现圆形图片效果
本文实例为大家分享了Android实现圆形图片效果的具体代码,供大家参考,具体内容如下
创建RoundPicture.java文件
在src/main/java/XX包下新建RoundPicture.java
写入RoundPicture.java文件
复制下方代码,并引入类即可
public class RoundPicture extends androidx.appcompat.widget.AppCompatImageView {
private Paint paint;
public RoundPicture(Context context) {
this(context, null);
}
public RoundPicture(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public RoundPicture(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
paint = new Paint();
}
// 绘制圆形图片
@Override
protected void onDraw(Canvas canvas) {
Drawable drawable = getDrawable();
if (null != drawable) {
Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
Bitmap b = getCircleBitmap(bitmap, 14);
final Rect rectSrc = new Rect(0, 0, b.getWidth(), b.getHeight());
final Rect rectDest = new Rect(0, 0, getWidth(), getHeight());
paint.reset();
canvas.drawBitmap(b, rectSrc, rectDest, paint);
} else {
super.onDraw(canvas);
}
}
// 获取圆形图片方法
private Bitmap getCircleBitmap(Bitmap bitmap, int pixels) {
Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final int color = 0xff424242;
final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
int x = bitmap.getWidth();
canvas.drawCircle(x / 2, x / 2, x / 2, paint);
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);
return output;
}
}
调用RoundPicture创建圆形图片
只需在.xml文件中插入图片处,将控件名改为
< XX.RoundPicture 并引入图片即可
<com.example.jh_android.RoundPicture
android:id="@+id/iv"
android:layout_height="200dp"
android:layout_width="200dp"
android:layout_marginTop="150dp"
android:layout_centerHorizontal="true"
android:src="@drawable/head"
/>
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。
以上是 Android实现圆形图片效果 的全部内容, 来源链接: utcz.com/p/243708.html