如何让按钮上的drawable更小?图标太大,实际上高于按钮。这是我正在使用的代码:
<Button
android:background="@drawable/red_button"
android:drawableLeft="@drawable/s_vit"
android:id="@+id/ButtonTest"
android:gravity="left|center_vertical"
android:text="S-SERIES CALCULATOR"
android:textColor="@android:color/white"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_marginLeft="25dp"
android:layout_marginRight="25dp"
android:drawablePadding="10dp">
</Button>
它的外观应该是它的外观,它现在看起来越低。
我尝试了这个,但没有显示图像。 : - (
Resources res = getResources();
ScaleDrawable sd = new ScaleDrawable(res.getDrawable(R.drawable.s_vit), 0, 10f, 10f);
Button btn = (Button) findViewById(R.id.ButtonTest);
btn.setCompoundDrawables(sd.getDrawable(), null, null, null);
答案 0 :(得分:84)
我找到了一个非常简单有效的XML解决方案,并不需要ImageButton
为您的图片制作一个可绘制文件,如下所示,并将其用于android:drawableLeft
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:id="@+id/half_overlay"
android:drawable="@drawable/myDrawable"
android:width="40dp"
android:height="40dp"
/>
</layer-list>
您可以使用android:width
和android:height
属性设置图片尺寸。
这样你至少可以为不同的屏幕获得相同的尺寸。
缺点是它与fitXY不完全相同,它会缩放图像宽度以适应X并相应地缩放图像高度。
答案 1 :(得分:67)
您应使用ImageButton并在android:src
中指定图片,并将android:scaletype
设为fitXY
Drawable drawable = getResources().getDrawable(R.drawable.s_vit);
drawable.setBounds(0, 0, (int)(drawable.getIntrinsicWidth()*0.5),
(int)(drawable.getIntrinsicHeight()*0.5));
ScaleDrawable sd = new ScaleDrawable(drawable, 0, scaleWidth, scaleHeight);
Button btn = findViewbyId(R.id.yourbtnID);
btn.setCompoundDrawables(sd.getDrawable(), null, null, null); //set drawableLeft for example
答案 2 :(得分:10)
按钮不会调整内部图像的大小。
我的解决方案不需要代码操作。
它使用TextView和ImageView布局。
布局的背景应该是红色的3d drawable。
您可能需要定义 android:scaleType xml属性。
示例:
<LinearLayout
android:id="@+id/list_item"
android:layout_width="fill_parent"
android:layout_height="50dp"
android:padding="2dp" >
<ImageView
android:layout_width="50dp"
android:layout_height="fill_parent"
android:src="@drawable/camera" />
<TextView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:lines="1"
android:gravity="center_vertical"
android:text="Hello - primary" />
</LinearLayout>
顺便说一句:
答案 3 :(得分:6)
建议使用ScaleDrawable作为Abhinav。
问题是drawable没有显示 - 它是ScaleDrawables中的某种错误。你需要以编程方式更改“级别”。这适用于每个按钮:
// Fix level of existing drawables
Drawable[] drawables = myButton.getCompoundDrawables();
for (Drawable d : drawables) if (d != null && d instanceof ScaleDrawable) d.setLevel(1);
myButton.setCompoundDrawables(drawables[0], drawables[1], drawables[2], drawables[3]);
答案 4 :(得分:6)
我的DiplayScaleHelper,效果很好:
import android.content.Context;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.ScaleDrawable;
import android.widget.Button;
public class DisplayHelper {
public static void scaleButtonDrawables(Button btn, double fitFactor) {
Drawable[] drawables = btn.getCompoundDrawables();
for (int i = 0; i < drawables.length; i++) {
if (drawables[i] != null) {
if (drawables[i] instanceof ScaleDrawable) {
drawables[i].setLevel(1);
}
drawables[i].setBounds(0, 0, (int) (drawables[i].getIntrinsicWidth() * fitFactor),
(int) (drawables[i].getIntrinsicHeight() * fitFactor));
ScaleDrawable sd = new ScaleDrawable(drawables[i], 0, drawables[i].getIntrinsicWidth(), drawables[i].getIntrinsicHeight());
if(i == 0) {
btn.setCompoundDrawables(sd.getDrawable(), drawables[1], drawables[2], drawables[3]);
} else if(i == 1) {
btn.setCompoundDrawables(drawables[0], sd.getDrawable(), drawables[2], drawables[3]);
} else if(i == 2) {
btn.setCompoundDrawables(drawables[0], drawables[1], sd.getDrawable(), drawables[3]);
} else {
btn.setCompoundDrawables(drawables[0], drawables[1], drawables[2], sd.getDrawable());
}
}
}
}
}
答案 5 :(得分:1)
如果您想使用1张图片并以不同尺寸显示,可以使用缩放比例(http://developer.android.com/guide/topics/resources/drawable-resource.html#Scale)。
答案 6 :(得分:0)
您可以使用不同尺寸的绘图,这些绘图使用不同的屏幕密度/大小等,以便您的图像在所有设备上都能正常显示。
见这里:http://developer.android.com/guide/practices/screens_support.html#support
答案 7 :(得分:0)
您是否尝试将图片打包在ScaleDrawable中,然后在按钮中使用它?
答案 8 :(得分:0)
这里是我为缩放矢量绘图而创建的函数。我用它来设置TextView复合drawable。
/**
* Used to load vector drawable and set it's size to intrinsic values
*
* @param context Reference to {@link Context}
* @param resId Vector image resource id
* @param tint If not 0 - colour resource to tint the drawable with.
* @param newWidth If not 0 then set the drawable's width to this value and scale
* height accordingly.
* @return On success a reference to a vector drawable
*/
@Nullable
public static Drawable getVectorDrawable(@NonNull Context context,
@DrawableRes int resId,
@ColorRes int tint,
float newWidth)
{
VectorDrawableCompat drawableCompat =
VectorDrawableCompat.create(context.getResources(), resId, context.getTheme());
if (drawableCompat != null)
{
if (tint != 0)
{
drawableCompat.setTint(ResourcesCompat.getColor(context.getResources(), tint, context.getTheme()));
}
drawableCompat.setBounds(0, 0, drawableCompat.getIntrinsicWidth(), drawableCompat.getIntrinsicHeight());
if (newWidth != 0.0)
{
float scale = newWidth / drawableCompat.getIntrinsicWidth();
float height = scale * drawableCompat.getIntrinsicHeight();
ScaleDrawable scaledDrawable = new ScaleDrawable(drawableCompat, Gravity.CENTER, 1.0f, 1.0f);
scaledDrawable.setBounds(0,0, (int) newWidth, (int) height);
scaledDrawable.setLevel(10000);
return scaledDrawable;
}
}
return drawableCompat;
}
答案 9 :(得分:0)
答案 10 :(得分:0)
因为你没有setLevel
。在setLevel(1)
之后,它将显示为您想要的
答案 11 :(得分:0)
我制作了一个自定义按钮类来实现这一目标。
CustomButton.java
public class CustomButton extends android.support.v7.widget.AppCompatButton {
private Drawable mDrawable;
public CustomButton(Context context, AttributeSet attrs) {
super(context, attrs);
TypedArray a = context.getTheme().obtainStyledAttributes(
attrs,
R.styleable.CustomButton,
0, 0);
try {
float mWidth = a.getDimension(R.styleable.CustomButton_drawable_width, 0);
float mHeight = a.getDimension(R.styleable.CustomButton_drawable_width, 0);
Drawable[] drawables = this.getCompoundDrawables();
Drawable[] resizedDrawable = new Drawable[4];
for (int i = 0; i < drawables.length; i++) {
if (drawables[i] != null) {
mDrawable = drawables[i];
}
resizedDrawable[i] = getResizedDrawable(drawables[i], mWidth, mHeight);
}
this.setCompoundDrawables(resizedDrawable[0], resizedDrawable[1], resizedDrawable[2], resizedDrawable[3]);
} finally {
a.recycle();
}
}
public Drawable getmDrawable() {
return mDrawable;
}
private Drawable getResizedDrawable(Drawable drawable, float mWidth, float mHeight) {
if (drawable == null) {
return null;
}
try {
Bitmap bitmap;
bitmap = Bitmap.createBitmap((int)mWidth, (int)mHeight, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
drawable.draw(canvas);
return drawable;
} catch (OutOfMemoryError e) {
// Handle the error
return null;
}
}
}
attrs.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="CustomButton">
<attr name="drawable_width" format="dimension" />
<attr name="drawable_height" format="dimension" />
</declare-styleable>
</resources>
xml中的用法
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:custom="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.MainActivity">
<com.example.CustomButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:drawableTop="@drawable/ic_hero"
android:text="Avenger"
custom:drawable_height="10dp"
custom:drawable_width="10dp" />
</RelativeLayout>
答案 12 :(得分:0)
我正在按照以下步骤进行操作。这样会在按钮中创建100x100尺寸的图像,与输入图像无关。
drawable.bounds = Rect(0,0,100,100)
button.setCompoundDrawables(drawable, null, null, null)
也不使用ScaleDrawable
。不使用button.setCompoundDrawablesRelativeWithIntrinsicBounds()
解决了我的问题,因为这似乎使用了固有界限(源图像大小),而不是您刚刚设置的界限。
答案 13 :(得分:0)
val drawable = ContextCompat.getDrawable(context, R.drawable.my_icon)
// or resources.getDrawable(R.drawable.my_icon, theme)
val sizePx = 25
drawable?.setBounds(0, 0, sizePx, sizePx)
// (left, top, right, bottom)
my_button.setCompoundDrawables(drawable, null, null, null)
我建议在TextView上创建扩展功能(按钮对其进行扩展),以方便重用。
button.leftDrawable(R.drawable.my_icon, 25)
// Button extends TextView
fun TextView.leftDrawable(@DrawableRes id: Int = 0, @DimenRes sizeRes: Int) {
val drawable = ContextCompat.getDrawable(context, id)
val size = context.resources.getDimensionPixelSize(sizeRes)
drawable?.setBounds(0, 0, size, size)
this.setCompoundDrawables(drawable, null, null, null)
}
答案 14 :(得分:-1)
我尝试了这篇文章的技巧,但没有发现它们中的任何一个如此吸引人。我的解决方案是使用imageview和textview并将imageview的顶部和底部与textview对齐。这样我就得到了理想的结果。这是一些代码:
<RelativeLayout
android:id="@+id/relativeLayout1"
android:layout_width="match_parent"
android:layout_height="48dp" >
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignTop="@+id/textViewTitle"
android:layout_alignBottom="@+id/textViewTitle"
android:src="@drawable/ic_back" />
<TextView
android:id="@+id/textViewBack"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textViewTitle"
android:layout_alignBottom="@+id/textViewTitle"
android:layout_toRightOf="@+id/imageView1"
android:text="Back"
android:textColor="@color/app_red"
android:textSize="@dimen/title_size" />
</RelativeLayout>