和 
ste*_*ory 107
所以经过大量的试验和错误,阅读不同的文章,最重要的是,通过API演示(ColorFilters.java - 在com.example.android.apis.graphics中找到)我找到了解决方案.
对于实体图像,我发现最好使用滤镜PorterDuff.Mode.SRC_ATOP,因为它会将颜色叠加在源图像的顶部,允许您将颜色更改为您要查找的颜色.
对于更复杂的图像,如上图所示,我发现最好的办法是将整个图像着色为白色(FFFFFF),以便在进行PorterDuff.Mode.MULTIPLY时,最终得到正确的颜色,图像中的所有黑色(000000)都将保持黑色.
colorfilters.java向您展示如果您在画布上绘制它是如何完成的,但如果您只需要绘制一个drawable颜色,那么这将起作用:
COLOR2 = Color.parseColor("#FF"+getColor());
Mode mMode = Mode.SRC_ATOP;
Drawable d = mCtx.getResources().getDrawable(R.drawable.image);
d.setColorFilter(COLOR2,mMode)
我创建了一个演示活动,使用一些API演示代码在每个颜色过滤器模式之间进行交换,以便针对不同的情况进行尝试,并发现它非常宝贵,所以我想我会在这里发布它.
public class ColorFilters extends GraphicsActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(new SampleView(this));
}
private static class SampleView extends View {
private Activity mActivity;
private Drawable mDrawable;
private Drawable[] mDrawables;
private Paint mPaint;
private Paint mPaint2;
private float mPaintTextOffset;
private int[] mColors;
private PorterDuff.Mode[] mModes;
private int mModeIndex;
private Typeface futura_bold;
private AssetManager assets;
private static void addToTheRight(Drawable curr, Drawable prev) {
Rect r = prev.getBounds();
int x = r.right + 12;
int center = (r.top + r.bottom) >> 1;
int h = curr.getIntrinsicHeight();
int y = center - (h >> 1);
curr.setBounds(x, y, x + curr.getIntrinsicWidth(), y + h);
}
public SampleView(Activity activity) {
super(activity);
mActivity = activity;
Context context = activity;
setFocusable(true);
/**1. GET DRAWABLE, SET BOUNDS */
assets = context.getAssets();
mDrawable = context.getResources().getDrawable(R.drawable.roundrect_gray_button_bg_nine);
mDrawable.setBounds(0, 0, mDrawable.getIntrinsicWidth(), mDrawable.getIntrinsicHeight());
mDrawable.setDither(true);
int[] resIDs = new int[] {
R.drawable.roundrect_gray_button_bg,
R.drawable.order_button_white,
R.drawable.yellowbar
};
mDrawables = new Drawable[resIDs.length];
Drawable prev = mDrawable;
for (int i = 0; i < resIDs.length; i++) {
mDrawables[i] = context.getResources().getDrawable(resIDs[i]);
mDrawables[i].setDither(true);
addToTheRight(mDrawables[i], prev);
prev = mDrawables[i];
}
/**2. SET Paint for writing text on buttons */
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setTextSize(16);
mPaint.setTextAlign(Paint.Align.CENTER);
mPaint2 = new Paint(mPaint);
/** Calculating size based on font */
futura_bold = Typeface.createFromAsset(assets,
"fonts/futurastd-bold.otf");
//Determine size and offset to write text in label based on font size.
mPaint.setTypeface(futura_bold);
Paint.FontMetrics fm = mPaint.getFontMetrics();
mPaintTextOffset = (fm.descent + fm.ascent) * 0.5f;
mColors = new int[] {
0,
0xFFA60017,//WE USE THESE
0xFFC6D405,
0xFF4B5B98,
0xFF656565,
0xFF8888FF,
0xFF4444FF,
};
mModes = new PorterDuff.Mode[] {
PorterDuff.Mode.DARKEN,
PorterDuff.Mode.DST,
PorterDuff.Mode.DST_ATOP,
PorterDuff.Mode.DST_IN,
PorterDuff.Mode.DST_OUT,
PorterDuff.Mode.DST_OVER,
PorterDuff.Mode.LIGHTEN,
PorterDuff.Mode.MULTIPLY,
PorterDuff.Mode.SCREEN,
PorterDuff.Mode.SRC,
PorterDuff.Mode.SRC_ATOP,
PorterDuff.Mode.SRC_IN,
PorterDuff.Mode.SRC_OUT,
PorterDuff.Mode.SRC_OVER,
PorterDuff.Mode.XOR
};
mModeIndex = 0;
updateTitle();
}
private void swapPaintColors() {
if (mPaint.getColor() == 0xFF000000) {
mPaint.setColor(0xFFFFFFFF);
mPaint2.setColor(0xFF000000);
} else {
mPaint.setColor(0xFF000000);
mPaint2.setColor(0xFFFFFFFF);
}
mPaint2.setAlpha(0);
}
private void updateTitle() {
mActivity.setTitle(mModes[mModeIndex].toString());
}
private void drawSample(Canvas canvas, ColorFilter filter) {
/** Create a rect around bounds, ensure size offset */
Rect r = mDrawable.getBounds();
float x = (r.left + r.right) * 0.5f;
float y = (r.top + r.bottom) * 0.5f - mPaintTextOffset;
/**Set color filter to selected color
* create canvas (filled with this color)
* Write text using paint (new color)
*/
mDrawable.setColorFilter(filter);
mDrawable.draw(canvas);
/** If the text doesn't fit in the button, make the text size smaller until it does*/
final float size = mPaint.measureText("Label");
if((int) size > (r.right-r.left)) {
float ts = mPaint.getTextSize();
Log.w("DEBUG","Text size was"+ts);
mPaint.setTextSize(ts-2);
}
canvas.drawText("Sausage Burrito", x, y, mPaint);
/** Write the text and draw it onto the drawable*/
for (Drawable dr : mDrawables) {
dr.setColorFilter(filter);
dr.draw(canvas);
}
}
@Override protected void onDraw(Canvas canvas) {
canvas.drawColor(0xFFCCCCCC);
canvas.translate(8, 12);
for (int color : mColors) {
ColorFilter filter;
if (color == 0) {
filter = null;
} else {
filter = new PorterDuffColorFilter(color,
mModes[mModeIndex]);
}
drawSample(canvas, filter);
canvas.translate(0, 55);
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
float x = event.getX();
float y = event.getY();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
break;
case MotionEvent.ACTION_MOVE:
break;
case MotionEvent.ACTION_UP:
// update mode every other time we change paint colors
if (mPaint.getColor() == 0xFFFFFFFF) {
mModeIndex = (mModeIndex + 1) % mModes.length;
updateTitle();
}
swapPaintColors();
invalidate();
break;
}
return true;
}
}
}
如果您想测试它,可以直接从API Demos活动复制另外两个依赖项GraphicsActivity.java和PictureLayout.java.
- 我不太清楚你如何做你提到的,"整个图像的颜色为白色(FFFFFF),这样当你做PorterDuff.Mode.MULTIPLY时,你最终会得到正确的颜色,而所有的黑色(000000)你的形象将保持黑色." 你能举个例子吗？ (5认同)
- @steve_gregory"整个图像的颜色为白色(FFFFFF)"是什么意思？ (3认同)
Min*_*Man 18
这在棒棒糖上真的很容易做到.制作一个xml drawable并引用你的png并设置这样的色调:
<?xml version="1.0" encoding="utf-8"?>
<bitmap
xmlns:android="http://schemas.android.com/apk/res/android"
android:src="@drawable/ic_back"
android:tint="@color/red_tint"/>
Jes*_*tro 12
你的答案非常好.虽然,如果你使用Textview和embed drawable,这个解决方案也是实践:
int colorARGB = R.color.your_color;
Drawable[] textviewDrawables = drawerItem.getCompoundDrawables();
// Left Drawable
textviewDrawables[0].setColorFilter(colorARGB, PorterDuff.Mode.SRC_ATOP);