Java 已调整大小的ImageView上的圆角
我尝试在ImageView上圆角,如果layoutParams设置为Java 已调整大小的ImageView上的圆角,java,android,android-layout,imageview,Java,Android,Android Layout,Imageview,我尝试在ImageView上圆角,如果layoutParams设置为WRAP\u CONTENT,则效果很好,但由于它们正在调整大小(因为它们设置为MATCH\u PARENT),我可能需要调整一些内容 画布/图像视图扩展类: import android.content.Context; import android.graphics.Canvas; import android.graphics.Path; import android.graphics.RectF; import andr
WRAP\u CONTENT
,则效果很好,但由于它们正在调整大小(因为它们设置为MATCH\u PARENT
),我可能需要调整一些内容
画布/图像视图扩展类:
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Path;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.widget.ImageView;
public class CustomImageView extends ImageView {
public static float radius = 18.0f;
public CustomImageView(Context context) {
super(context);
}
public CustomImageView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public CustomImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
protected void onDraw(Canvas canvas) {
//float radius = 36.0f;
Path clipPath = new Path();
RectF rect = new RectF(0, 0, this.getWidth(), this.getHeight());
clipPath.addRoundRect(rect, radius, radius, Path.Direction.CW);
canvas.clipPath(clipPath);
super.onDraw(canvas);
}
}
活动类别:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_gameplay);
RelativeLayout gameplayRelativeLayoutImages =
(RelativeLayout)findViewById(R.id.gameplay_relative_layout_images);
ImageView part1= new CustomImageView(this);
part1.setImageResource(R.drawable.picture1);
part1.setLayoutParams(new
RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,
RelativeLayout.LayoutParams.MATCH_PARENT));
gameplayRelativeLayoutImages.addView(part1);
}
我不太确定你遇到的问题,但我已经用这个很酷的类创建了一段时间的圆形图像,我从来没有遇到过任何问题,试试吧
public class RoundedImageView extends android.support.v7.widget.AppCompatImageView {
public RoundedImageView(Context context) {
super(context);
}
public RoundedImageView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public RoundedImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
protected void onDraw(Canvas canvas) {
Drawable drawable = getDrawable();
if (drawable == null) {
return;
}
if (getWidth() == 0 || getHeight() == 0) {
return;
}
Bitmap b = ((BitmapDrawable) drawable).getBitmap();
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) {
float smallest = Math.min(bmp.getWidth(), bmp.getHeight());
float factor = smallest / radius;
sbmp = Bitmap.createScaledBitmap(bmp, (int)(bmp.getWidth() / factor),
(int)(bmp.getHeight() / factor), false);
} else {
sbmp = bmp;
}
Bitmap output = Bitmap.createBitmap(radius, radius,
Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final int color = 0xffa19774;
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, radius, radius);
paint.setAntiAlias(true);
paint.setFilterBitmap(true);
paint.setDither(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(Color.parseColor("#BAB399"));
canvas.drawCircle(radius / 2 + 0.7f,
radius / 2 + 0.7f, radius / 2 + 0.1f, paint);
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
canvas.drawBitmap(sbmp, rect, rect, paint);
return output;
}
}
使用方法:
ImageView mImgView = (ImageView) findViewById(R.id.imageView);
Bitmap bitmap= BitmapFactory.decodeResource(this.getResources(),
R.drawable.some_image);
// bitmap image, radius
mImgView.setImageBitmap(RoundedImageView.getCroppedBitmap(bitmap, 360));
你能举一个问题的例子吗?@OrkunKoçyiğ它不能发布图像,因为我是新来的:x但基本上只有一个ImageView,它通过
MATCH_PARENT
属性调整大小。我怀疑是因为行rectfrect=newrectf(0,0,this.getWidth(),this.getHeight())代码>它采用实际的ImageView大小,而不是调整大小的更大的尺寸,因此它不能圆角。