Android Studio Vector Assets工具可以将矢量绘制转换为PNG-s,用于Lollipop之前的设备,但是我会看到质量非常差的PNG-s,如您所见:
更重要的是,按钮的背景纯色应该是您在左侧看到的浅绿色,但是可绘制的覆盖它:
<item android:state_checked="true"
android:drawable="@drawable/show">
<shape android:shape="rectangle">
<corners android:bottomRightRadius="8dp"/>
<solid android:color="@color/waveComponentGreen"/>
</shape>
</item>
<item android:state_checked="false"
android:drawable="@drawable/hide">
<shape android:shape="rectangle">
<corners android:bottomRightRadius="8dp"/>
<solid android:color="@color/waveComponentGreen"/>
</shape>
</item>
drawable的xml是(材质图标的默认值):
<vector xmlns:android="http://schemas.android.com/apk/res/android"
android:width="24dp"
android:height="24dp"
android:viewportWidth="24.0"
android:viewportHeight="24.0">
<path
android:fillColor="#FF000000"
android:pathData="M8.59,16.34l4.58,-4.59 -4.58,-4.59L10,5.75l6,6 -6,6z"/>
我还希望通过调整值使图标显得更小,我注意到增加视口尺寸会减少图标,但我不确定我理解为什么。
所以:如何使图标和生成的PNG看起来更小,更少模糊,并且资源文件中设置了背景颜色?谢谢。
编辑:我通过将它们组合在一个单独的xml文件中并使用图层列表,设法获得带有图标的纯色背景:
<layer-list
xmlns:android="http://schemas.android.com/apk/res/android" >
<item>
<shape android:shape="rectangle">
<corners android:bottomRightRadius="10dp"/>
<solid android:color="@color/waveComponentGreen"/>
</shape>
</item>
<item android:drawable="@drawable/show"
android:top="10dp"
android:bottom="10dp"
android:left="10dp"
android:right="10dp"
/>
结果是:
我设法通过增加矢量drawable的宽度和高度来减少模糊。但是,如果没有android:top|bottom|left|right
标签,则drawable会在按钮的整个区域内拉伸。第二个按钮不需要有背景纯色,所以我没有使用layer-list tags =&gt;无法为drawable设置top|bottom|left|right
保证金
如果我减小按钮大小,我正在做的是减少按钮的可点击区域。
我更新的问题是如何设置按钮/切换按钮/单选按钮内的矢量绘图的大小而不减小按钮本身的大小?
更新
我找不到一种方法来调整API 21之前的设备上的矢量绘图的大小。因此,我将按钮本身缩小,增加了每个按钮的触摸区域。
答案 0 :(得分:10)
缩放任何drawable的正确方法是使用vectorDrawable.setBounds(left,top,right,bottom)
,
但不幸的是,这对于矢量绘图不起作用(为什么是谷歌?)。
因此,作为一种解决方法,我加载了矢量drawable,将它们转换为bitmap drawable,这将允许我们在位图drawable上使用setBounds
方法。请注意,您在此处缩放位图,因此可能会丢失图像的清晰度。当我需要将drawable用作文本视图的复合可绘制或按钮时,我主要使用这些方法。
我最后编写了一个辅助类,它将加载一个矢量drawable设置一个色调并返回一个bitmap drawable,你可以根据需要实际缩放和着色。我已经测试了它的API级别19到23,它可以工作。
请勿忘记在 build.gradle 中使用vectorDrawables.useSupportLibrary = true
。
public class VectorDrawableUtils {
/**
* Gets a Bitmap from provided Vector Drawable image
*
* @param vd VectorDrawable
* @return Bitmap
*/
public static Optional<Bitmap> createBitmapFromVectorDrawable(final @NonNull Drawable vd) {
try {
Bitmap bitmap;
bitmap = Bitmap.createBitmap(vd.getIntrinsicWidth(), vd.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
vd.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
vd.draw(canvas);
return Optional.of(bitmap);
} catch (OutOfMemoryError e) {
Injector.getDependency(getContext(), IEventTracker.class).logHandledException(e);
return Optional.empty();
}
}
/**
* Loads vector drawable and apply tint color on it.
*/
public static Drawable loadVectorDrawableWithTintColor(final @DrawableRes int vdRes,
final @ColorRes int clrRes,final Context context) {
Drawable drawable = ContextCompat.getDrawable(context, vdRes);
DrawableCompat.setTint(drawable, getContext().getResources().getColor(clrRes));
return drawable;
}
/**
* Converts given vector drawable to Bitmap drawable
*/
public static BitmapDrawable convertVectorDrawableToBitmapDrawable(final @NonNull Drawable vd) {
//it is safe to create empty bitmap drawable from null source
return new BitmapDrawable(createBitmapFromVectorDrawable(vd).get());
}
/**
* Loads vector drawable , aplys tint on it and returns a wrapped bitmap drawable.
* Bitmap drawable can be resized using setBounds method (unlike the VectorDrawable)
* @param context Requires view context !
*/
public static Drawable loadVectorDrawableWithTint(
final @DrawableRes int vectorDrawableRes, final @ColorRes int colorRes,final Context context) {
Drawable vd = VectorDrawableUtils.loadVectorDrawableWithTintColor(vectorDrawableRes,
colorRes, context);
final BitmapDrawable bitmapDrawable = VectorDrawableUtils.convertVectorDrawableToBitmapDrawable(vd);
ColorStateList tint = ContextCompat.getColorStateList(context,colorRes);
final Drawable wrappedDrawable = DrawableCompat.wrap(bitmapDrawable);
DrawableCompat.setTintList(wrappedDrawable,tint);
return wrappedDrawable;
}
}
现在我将使用这样的辅助类:
Drawable bd = VectorDrawableUtils.loadVectorDrawableWithTint(
R.drawable.ic_dropdown, R.color.black,getContext());
bd.setBounds(0, 0, textView.getMeasuredHeight(), textView.getMeasuredHeight());
textView.setCompoundDrawablesWithIntrinsicBounds(null, null, bd, null);
使用视图或活动的上下文非常重要,而不是应用程序上下文! 希望它能解决你的问题,或者帮助别人。如果有人有更好更清洁的解决方案,我也很想知道。
答案 1 :(得分:0)
MyTextView类:
public class MyTextView extends AppCompatTextView {
public MyTextView(Context context) {
super(context);
}
public MyTextView(Context context, AttributeSet attrs) {
super(context, attrs);
initAttrs(context, attrs);
}
public MyTextView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initAttrs(context, attrs);
}
void initAttrs(Context context, AttributeSet attrs) {
if (attrs != null) {
TypedArray attributeArray = context.obtainStyledAttributes(
attrs,
R.styleable.MyTextView);
int defaultWidthHeight = 0;
int widthHeight = 0;
Drawable drawableLeft = null;
Drawable drawableStart = null;
Drawable drawableRight = null;
Drawable drawableEnd = null;
Drawable drawableBottom = null;
Drawable drawableTop = null;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
drawableLeft = attributeArray.getDrawable(R.styleable.MyTextView_drawableLeftCompatTextView);
drawableStart = attributeArray.getDrawable(R.styleable.MyTextView_drawableStartCompatTextView);
drawableRight = attributeArray.getDrawable(R.styleable.MyTextView_drawableRightCompatTextView);
drawableEnd = attributeArray.getDrawable(R.styleable.MyTextView_drawableEndCompatTextView);
drawableBottom = attributeArray.getDrawable(R.styleable.MyTextView_drawableBottomCompatTextView);
drawableTop = attributeArray.getDrawable(R.styleable.MyTextView_drawableTopCompatTextView);
} else {
final int drawableLeftId = attributeArray.getResourceId(R.styleable.MyTextView_drawableLeftCompatTextView, -1);
final int drawableStartId = attributeArray.getResourceId(R.styleable.MyTextView_drawableStartCompatTextView, -1);
final int drawableRightId = attributeArray.getResourceId(R.styleable.MyTextView_drawableRightCompatTextView, -1);
final int drawableEndId = attributeArray.getResourceId(R.styleable.MyTextView_drawableEndCompatTextView, -1);
final int drawableBottomId = attributeArray.getResourceId(R.styleable.MyTextView_drawableBottomCompatTextView, -1);
final int drawableTopId = attributeArray.getResourceId(R.styleable.MyTextView_drawableTopCompatTextView, -1);
if (drawableLeftId != -1)
drawableLeft = AppCompatResources.getDrawable(context, drawableLeftId);
if(drawableStartId != -1)
drawableStart = AppCompatResources.getDrawable(context, drawableStartId);
if (drawableRightId != -1)
drawableRight = AppCompatResources.getDrawable(context, drawableRightId);
if(drawableEndId != -1)
drawableEnd = AppCompatResources.getDrawable(context, drawableEndId);
if (drawableBottomId != -1)
drawableBottom = AppCompatResources.getDrawable(context, drawableBottomId);
if (drawableTopId != -1)
drawableTop = AppCompatResources.getDrawable(context, drawableTopId);
}
if(!attributeArray.hasValue(R.styleable.MyTextView_drawableWidthHeightCompatTextView)) {
if (attributeArray.hasValue(R.styleable.MyTextView_drawableLeftCompatTextView)) {
defaultWidthHeight = drawableLeft.getIntrinsicWidth();
} else if (attributeArray.hasValue(R.styleable.MyTextView_drawableStartCompatTextView)) {
defaultWidthHeight = drawableStart.getIntrinsicWidth();
} else if (attributeArray.hasValue(R.styleable.MyTextView_drawableRightCompatTextView)) {
defaultWidthHeight = drawableRight.getIntrinsicWidth();
} else if (attributeArray.hasValue(R.styleable.MyTextView_drawableEndCompatTextView)) {
defaultWidthHeight = drawableEnd.getIntrinsicWidth();
} else if (attributeArray.hasValue(R.styleable.MyTextView_drawableBottomCompatTextView)) {
defaultWidthHeight = drawableBottom.getIntrinsicWidth();
} else if (attributeArray.hasValue(R.styleable.MyTextView_drawableTopCompatTextView)) {
defaultWidthHeight = drawableTop.getIntrinsicWidth();
}
widthHeight = attributeArray.getInt(R.styleable.MyTextView_drawableWidthHeightCompatTextView, defaultWidthHeight);
} else
widthHeight = attributeArray.getInt(R.styleable.MyTextView_drawableWidthHeightCompatTextView, defaultWidthHeight);
if(attributeArray.hasValue(R.styleable.MyTextView_drawableColorCompatTextView)){
ColorStateList tintColor = attributeArray.getColorStateList(R.styleable.MyTextView_drawableColorCompatTextView);
if (attributeArray.hasValue(R.styleable.MyTextView_drawableLeftCompatTextView)) {
//drawableLeft.setColorFilter(new PorterDuffColorFilter(tintColor.getDefaultColor(), PorterDuff.Mode.MULTIPLY));
DrawableCompat.setTintList(drawableLeft, tintColor);
} else if (attributeArray.hasValue(R.styleable.MyTextView_drawableStartCompatTextView)) {
//drawableStart.setColorFilter(new PorterDuffColorFilter(tintColor.getDefaultColor(), PorterDuff.Mode.MULTIPLY));
DrawableCompat.setTintList(drawableStart, tintColor);
} else if (attributeArray.hasValue(R.styleable.MyTextView_drawableRightCompatTextView)) {
//drawableRight.setColorFilter(new PorterDuffColorFilter(tintColor.getDefaultColor(), PorterDuff.Mode.MULTIPLY));
DrawableCompat.setTintList(drawableRight, tintColor);
} else if (attributeArray.hasValue(R.styleable.MyTextView_drawableEndCompatTextView)) {
//drawableEnd.setColorFilter(new PorterDuffColorFilter(tintColor.getDefaultColor(), PorterDuff.Mode.MULTIPLY));
DrawableCompat.setTintList(drawableEnd, tintColor);
} else if (attributeArray.hasValue(R.styleable.MyTextView_drawableBottomCompatTextView)) {
//drawableBottom.setColorFilter(new PorterDuffColorFilter(tintColor.getDefaultColor(), PorterDuff.Mode.MULTIPLY));
DrawableCompat.setTintList(drawableBottom, tintColor);
} else if (attributeArray.hasValue(R.styleable.MyTextView_drawableTopCompatTextView)) {
//drawableTop.setColorFilter(new PorterDuffColorFilter(tintColor.getDefaultColor(), PorterDuff.Mode.MULTIPLY));
DrawableCompat.setTintList(drawableTop, tintColor);
}
}
WrappedDrawable drawableLeftWrapped = new WrappedDrawable(drawableLeft);
drawableLeftWrapped.setBounds(0, 0, widthHeight, widthHeight);
WrappedDrawable drawableStartWrapped = new WrappedDrawable(drawableStart);
drawableStartWrapped.setBounds(0, 0, widthHeight, widthHeight);
WrappedDrawable drawableRightWrapped = new WrappedDrawable(drawableRight);
drawableRightWrapped.setBounds(0, 0, widthHeight, widthHeight);
WrappedDrawable drawableEndWrapped = new WrappedDrawable(drawableEnd);
drawableEndWrapped.setBounds(0, 0, widthHeight, widthHeight);
WrappedDrawable drawableBottomWrapped = new WrappedDrawable(drawableBottom);
drawableBottomWrapped.setBounds(0, 0, widthHeight, widthHeight);
WrappedDrawable drawableTopWrapped = new WrappedDrawable(drawableTop);
drawableTopWrapped.setBounds(0, 0, widthHeight, widthHeight);
setCompoundDrawablesWithIntrinsicBounds(drawableLeftWrapped, drawableTopWrapped, drawableRightWrapped, drawableBottomWrapped);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1)
setCompoundDrawablesRelativeWithIntrinsicBounds(drawableStartWrapped, drawableTopWrapped, drawableEndWrapped, drawableBottomWrapped);
attributeArray.recycle();
}
}
class WrappedDrawable extends Drawable {
private final Drawable _drawable;
protected Drawable getDrawable() {
return _drawable;
}
public WrappedDrawable(Drawable drawable) {
super();
_drawable = drawable;
}
@Override
public void setBounds(int left, int top, int right, int bottom) {
//update bounds to get correctly
super.setBounds(left, top, right, bottom);
Drawable drawable = getDrawable();
if (drawable != null) {
drawable.setBounds(left, top, right, bottom);
}
}
@Override
public void setAlpha(int alpha) {
Drawable drawable = getDrawable();
if (drawable != null) {
drawable.setAlpha(alpha);
}
}
@Override
public void setColorFilter(ColorFilter colorFilter) {
Drawable drawable = getDrawable();
if (drawable != null) {
drawable.setColorFilter(colorFilter);
}
}
@Override
public int getOpacity() {
Drawable drawable = getDrawable();
return drawable != null
? drawable.getOpacity()
: PixelFormat.UNKNOWN;
}
@Override
public void draw(Canvas canvas) {
Drawable drawable = getDrawable();
if (drawable != null) {
drawable.draw(canvas);
}
}
@Override
public int getIntrinsicWidth() {
Drawable drawable = getDrawable();
return drawable != null
? drawable.getBounds().width()
: 0;
}
@Override
public int getIntrinsicHeight() {
Drawable drawable = getDrawable();
return drawable != null ?
drawable.getBounds().height()
: 0;
}
}
}
attrs.xml:
<declare-styleable name="MyTextView">
<attr name="drawableColorCompatTextView" format="reference|color"/>
<attr name="drawableWidthHeightCompatTextView" format="integer"/>
<attr name="drawableLeftCompatTextView" format="reference"/>
<attr name="drawableStartCompatTextView" format="reference"/>
<attr name="drawableRightCompatTextView" format="reference"/>
<attr name="drawableEndCompatTextView" format="reference"/>
<attr name="drawableTopCompatTextView" format="reference"/>
<attr name="drawableBottomCompatTextView" format="reference"/>
</declare-styleable>
用法:
<com.packagename.MyTextView
android:id="@+id/txtUserName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:drawableLeftCompatTextView="@drawable/ic_username"
app:drawableStartCompatTextView="@drawable/ic_username"
app:drawableWidthHeightCompatTextView="48"
app:drawableColorCompatTextView="@color/blue" />
注意:此处唯一的问题是未经修改的向量(drawableWidthHeightCompatTextView
未使用),向量的width
和height
为24,
在设备上的大小相等,调整后的矢量(矢量width
和height
为12和drawableWidthHeightCompatTextView="24"
)。
答案 2 :(得分:0)
看看我发现的它,它可以在Vector和常规Drawables中使用! 我认为这是我看到的最短的解决方案。
想法是创建一个具有固定固有尺寸的自定义图形对象,并将绘图作业传递给原始图形对象。
final Drawable d = container.getContext().getDrawable(R.drawable.your_drawable);
Drawable icon = new ColorDrawable(){
Drawable iconOrig = d;
@Override
public void setBounds(int left, int top, int right, int bottom){
super.setBounds(left, top, right, bottom);//This is needed so that getBounds on this class would work correctly.
iconOrig.setBounds(left, top, right, bottom);
}
@Override
public void draw(Canvas canvas){
iconOrig.draw(canvas);
}
@Override
public int getIntrinsicWidth(){
return 27;//the width you want
}
@Override
public int getIntrinsicHeight(){
return 19;// the height you want
}
};
答案 3 :(得分:0)
我使用FrameLayout
将ImageButton
和ImageView
放在一起,并能够调整ImageView
的大小:
<FrameLayout
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="60dp"
android:layout_height="60dp"
>
<ImageButton
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
<ImageView
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_gravity="center"
app:srcCompat="@drawable/baseline_arrow_right_24"
/>
</FrameLayout>