如何制作圆形菜单图标?请查看详细信息 [英] How can I make a circular menu icon? Please see details

问题描述

我正在开发材料设计应用&我希望工具栏上的菜单图标应显示为圆形图像，而不是矩形图像.

I'm developing a material design app & I want that the menu icon on toolbar should appear as a circular image instead of rectangular image.

这是屏幕截图:

看菜单图标，它显示为矩形，但我希望它是圆形.

Look at the menu icon, it is appearing as a rectangle, but I want it to be circular.

我该怎么做?

推荐答案

共有4个步骤:

1.创建菜单项

<menu xmlns:tools="http://schemas.android.com/tools"
      xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto">
    <item
        android:id="@+id/profile_menu_item"
        android:icon="@drawable/prof"
        app:showAsAction="always"
        tools:ignore="MenuTitle"/>
</menu>

2.检索菜单项

private MenuItem mProfileMenuItem;
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        super.onCreateOptionsMenu(menu);
        getMenuInflater().inflate(R.menu.main, menu);
        mProfileMenuItem = menu.findItem(R.id.profile_menu_item);
        return true;
    }

3.将位图裁剪为圆形位图

public Bitmap getCroppedBitmap(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());

    paint.setAntiAlias(true);
    canvas.drawARGB(0, 0, 0, 0);
    paint.setColor(color);
    // canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
    canvas.drawCircle(bitmap.getWidth() / 2, bitmap.getHeight() / 2,
            bitmap.getWidth() / 2, paint);
    paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
    canvas.drawBitmap(bitmap, rect, rect, paint);
    //Bitmap _bmp = Bitmap.createScaledBitmap(output, 60, 60, false);
    //return _bmp;
    return output;
}

源

4.将网址图片下载为位图，然后裁剪

new Handler().post(() -> Glide.with(getApplicationContext()).asBitmap().load(url).into(new SimpleTarget<Bitmap>() {
        @Override
        public void onResourceReady(Bitmap resource, Transition<? super Bitmap> transition) {
            if (mProfileMenuItem == null) return;
            mProfileMenuItem.setIcon(new BitmapDrawable(getResources(), Utils.getCroppedBitmap(resource)));
        }
    }));

源

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