Android - 带圆角的ImageButton

Question

我需要在android：src和圆角上创建一个带有图像的ImageButton。 我怎样才能做到这一点？我还需要为按钮设置自定义大小，我希望图像会随按钮大小自动调整大小。

Answer 1

圆角ImageButton的

使用它。

@Override
public void onCreate(Bundle mBundle) {
super.onCreate(mBundle);
setContentView(R.layout.main);

ImageButton image = (ImageButton) findViewById(R.id.img);
Bitmap bitImg = BitmapFactory.decodeResource(getResources(),
    R.drawable.default_profile_image);
image.setOnClickListener(new OnClickListener() {

    @Override
    public void onClick(View v) {
    // TODO Auto-generated method stub

    Toast.makeText(getApplicationContext(), "Hello", Toast.LENGTH_LONG).show();
    }
});
image.setImageBitmap(getRoundedCornerImage(bitImg));
}

public static Bitmap getRoundedCornerImage(Bitmap bitmap) {
Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),
    bitmap.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(output);

final int color = 0xff424242;
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
final RectF rectF = new RectF(rect);
final float roundPx = 100;

paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);

paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);

return output;

}

这里，roundPx用于圆形。