经过长时间的努力,我终于解决了您遇到的问题,希望现在它能够给你想要的结果,查看下面的代码并让我知道它是否有效?
向以下函数传递适当的参数以获得具有所需颜色边框的圆角。
public static Bitmap getRoundedCornerImage(Bitmap bitmap, int cornerDips, int borderDips, Context context) {
Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(),
Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final int borderSizePx = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, (float) borderDips,
context.getResources().getDisplayMetrics());
final int cornerSizePx = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, (float) cornerDips,
context.getResources().getDisplayMetrics());
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
final RectF rectF = new RectF(rect);
paint.setAntiAlias(true);
paint.setColor(0xFFFFFFFF);
paint.setStyle(Paint.Style.FILL);
canvas.drawARGB(0, 0, 0, 0);
canvas.drawRoundRect(rectF, cornerSizePx, cornerSizePx, paint);
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);
paint.setColor((Color.RED));
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth((float) borderSizePx);
canvas.drawRoundRect(rectF, cornerSizePx, cornerSizePx, paint);
return output;
}
main.xml
<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"
android:gravity="center"
tools:context=".MainActivity" >
<ImageView
android:id="@+id/image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
/>
</RelativeLayout>
OnCreate
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ImageView rl=(ImageView)findViewById(R.id.image);
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.testing);
rl.setImageBitmap(getRoundedCornerImage(bitmap, 10, 10, this));
}
原始图像
![输入图像描述](https://istack.dev59.com/kAfCy.webp)
输出结果
![输出图像描述](https://istack.dev59.com/tiqsD.webp)
以下链接帮助我实现了目标:
在Android中使用圆角边框覆盖位图
创建带有圆角的ImageView
如何使ImageView具有圆角
如何设置paint.setColor(int color)