我自定义了@ChrisJenkins 方法，因此您可以设置 RatingBar 图标的大小和自定义色调颜色以对图像进行评分。您可以在 RatingBar 上设置填充或设置自定义宽度和高度。@ChrisJenkins 解决方案帮助我最终想出了一个完全可定制的 RatingBar。您也可以在 XML 中设置参数。
public class DrawableRatingBar extends RatingBar
{
// TileBitmap to base the width and hight off of.
@Nullable
private Bitmap iconTile;
private float scaleIconFactor;
private @ColorInt int iconBackgroundColor;
private @ColorInt int iconForegroundColor;
private @DrawableRes int iconDrawable;
public DrawableRatingBar(Context context)
{
super(context);
init();
}
public DrawableRatingBar(Context context, AttributeSet attrs)
{
super(context, attrs);
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.DrawableRatingBarItem);
scaleIconFactor = a.getFloat(R.styleable.DrawableRatingBarItem_scaleIconFactor, 1);
iconBackgroundColor = a.getColor(R.styleable.DrawableRatingBarItem_iconBackgroundColor, Color.BLACK);
iconForegroundColor = a.getColor(R.styleable.DrawableRatingBarItem_iconForegroundColor, Color.WHITE);
iconDrawable = a.getResourceId(R.styleable.DrawableRatingBarItem_iconDrawable, -1);
a.recycle();
init();
}
public DrawableRatingBar(Context context, AttributeSet attrs, int defStyleAttr)
{
super(context, attrs, defStyleAttr);
init();
}
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public DrawableRatingBar(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)
{
super(context, attrs, defStyleAttr, defStyleRes);
init();
}
private void init()
{
setProgressDrawable(createProgressDrawable());
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if (iconTile != null)
{
final int width = iconTile.getWidth() * getNumStars();
final int height = iconTile.getHeight();
setMeasuredDimension(resolveSizeAndState(width, widthMeasureSpec, 0),
resolveSizeAndState(height, heightMeasureSpec, 0));
}
}
protected LayerDrawable createProgressDrawable()
{
final Drawable backgroundDrawable = createBackgroundDrawableShape();
LayerDrawable layerDrawable = new LayerDrawable(new Drawable[] {backgroundDrawable,
backgroundDrawable,
createProgressDrawableShape()});
layerDrawable.setId(0, android.R.id.background);
layerDrawable.setId(1, android.R.id.secondaryProgress);
layerDrawable.setId(2, android.R.id.progress);
return layerDrawable;
}
protected Drawable createBackgroundDrawableShape()
{
Drawable drawable = ContextCompat.getDrawable(getContext(), iconDrawable);
final Bitmap tileBitmap = scaleImageWithColor(drawable, scaleIconFactor, iconBackgroundColor);
if (iconTile == null)
{
iconTile = tileBitmap;
}
final ShapeDrawable shapeDrawable = new ShapeDrawable(getDrawableShape());
final BitmapShader bitmapShader = new BitmapShader(tileBitmap, Shader.TileMode.REPEAT, Shader.TileMode.CLAMP);
shapeDrawable.getPaint().setShader(bitmapShader);
return shapeDrawable;
}
private void setRatingStarColor(Drawable drawable, @ColorInt int color)
{
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
{
DrawableCompat.setTint(drawable, color);
}
else
{
drawable.setColorFilter(color, PorterDuff.Mode.SRC_IN);
}
}
protected Drawable createProgressDrawableShape()
{
Drawable drawable = ContextCompat.getDrawable(getContext(), iconDrawable);
final Bitmap tileBitmap = scaleImageWithColor(drawable, scaleIconFactor, iconForegroundColor);
final ShapeDrawable shapeDrawable = new ShapeDrawable(getDrawableShape());
final BitmapShader bitmapShader = new BitmapShader(tileBitmap, Shader.TileMode.REPEAT, Shader.TileMode.CLAMP);
shapeDrawable.getPaint().setShader(bitmapShader);
return new ClipDrawable(shapeDrawable, Gravity.LEFT, ClipDrawable.HORIZONTAL);
}
Shape getDrawableShape()
{
return new RectShape();
}
public Bitmap scaleImageWithColor(Drawable drawable, float scaleFactor, @ColorInt int color)
{
Bitmap b = ((BitmapDrawable) drawable).getBitmap();
int sizeX = Math.round(drawable.getIntrinsicWidth() * scaleFactor);
int sizeY = Math.round(drawable.getIntrinsicHeight() * scaleFactor);
Bitmap bitmapResized = Bitmap.createScaledBitmap(b, sizeX, sizeY, true);
Canvas canvas = new Canvas(bitmapResized);
Paint paint = new Paint(Paint.FILTER_BITMAP_FLAG);
paint.setAntiAlias(true);
ColorFilter filter = new LightingColorFilter(color, 1);
paint.setColorFilter(filter);
canvas.drawBitmap(bitmapResized, 0, 0, paint);
return bitmapResized;
}
protected Bitmap fromDrawable(final Drawable drawable, final int height, final int width) {
final Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
final Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
drawable.draw(canvas);
return bitmap;
}
public float getScaleIconFactor() {
return scaleIconFactor;
}
public void setScaleIconFactor(float scaleIconFactor) {
this.scaleIconFactor = scaleIconFactor;
}
public int getIconForegroundColor() {
return iconForegroundColor;
}
public void setIconForegroundColor(int iconForegroundColor) {
this.iconForegroundColor = iconForegroundColor;
}
public int getIconBackgroundColor() {
return iconBackgroundColor;
}
public void setIconBackgroundColor(int iconBackgroundColor) {
this.iconBackgroundColor = iconBackgroundColor;
}
public int getIconDrawable() {
return iconDrawable;
}
public void setIconDrawable(int iconDrawable) {
this.iconDrawable = iconDrawable;
}
}
自定义属性：
<declare-styleable name="DrawableRatingBarItem">
<attr name="scaleIconFactor" format="float"/>
<attr name="iconBackgroundColor" format="color"/>
<attr name="iconForegroundColor" format="color"/>
<attr name="iconDrawable" format="reference"/>
</declare-styleable>