我这里有一个xml的textView。
<TextView
android:id="@+id/bookTitle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:drawableLeft="@drawable/checkmark"
android:gravity="center_vertical"
android:textStyle="bold"
android:textSize="24dip"
android:maxLines="1"
android:ellipsize="end"/>
正如你所看到的，我在xml中设置了drawablleft。
我想在代码中改变可绘制的。
有办法做这件事吗?或者在文本视图的代码中设置drawablleft ?
当前回答
static private Drawable **scaleDrawable**(Drawable drawable, int width, int height) {
int wi = drawable.getIntrinsicWidth();
int hi = drawable.getIntrinsicHeight();
int dimDiff = Math.abs(wi - width) - Math.abs(hi - height);
float scale = (dimDiff > 0) ? width / (float)wi : height /
(float)hi;
Rect bounds = new Rect(0, 0, (int)(scale * wi), (int)(scale * hi));
drawable.setBounds(bounds);
return drawable;
}
其他回答
使用芬兰湾的科特林:
您可以创建一个扩展函数，或者直接使用setCompoundDrawablesWithIntrinsicBounds。
fun TextView.leftDrawable(@DrawableRes id: Int = 0) {
this.setCompoundDrawablesWithIntrinsicBounds(id, 0, 0, 0)
}
如果需要调整可绘制对象的大小，可以使用此扩展函数。
textView.leftDrawable(R.drawable.my_icon, R.dimen.icon_size)
fun TextView.leftDrawable(@DrawableRes id: Int = 0, @DimenRes sizeRes: Int) {
val drawable = ContextCompat.getDrawable(context, id)
val size = resources.getDimensionPixelSize(sizeRes)
drawable?.setBounds(0, 0, size, size)
this.setCompoundDrawables(drawable, null, null, null)
}
要想变得更花哨，可以创建一个允许修改大小和/或颜色的包装器。
textView.leftDrawable(R.drawable.my_icon, colorRes = R.color.white)
fun TextView.leftDrawable(@DrawableRes id: Int = 0, @DimenRes sizeRes: Int = 0, @ColorInt color: Int = 0, @ColorRes colorRes: Int = 0) {
val drawable = drawable(id)
if (sizeRes != 0) {
val size = resources.getDimensionPixelSize(sizeRes)
drawable?.setBounds(0, 0, size, size)
}
if (color != 0) {
drawable?.setColorFilter(color, PorterDuff.Mode.SRC_ATOP)
} else if (colorRes != 0) {
val colorInt = ContextCompat.getColor(context, colorRes)
drawable?.setColorFilter(colorInt, PorterDuff.Mode.SRC_ATOP)
}
this.setCompoundDrawables(drawable, null, null, null)
}
你可以使用以下任何方法来设置TextView上的Drawable:
1- setCompoundDrawablesWithIntrinsicBounds(int, int, int, int)
2- setCompoundDrawables(Left_Drawable, Top_Drawable, Right_Drawable, Bottom_Drawable)
为了从你可以使用的资源中获取:
getResources().getDrawable(R.drawable.your_drawable_id);
static private Drawable **scaleDrawable**(Drawable drawable, int width, int height) {
int wi = drawable.getIntrinsicWidth();
int hi = drawable.getIntrinsicHeight();
int dimDiff = Math.abs(wi - width) - Math.abs(hi - height);
float scale = (dimDiff > 0) ? width / (float)wi : height /
(float)hi;
Rect bounds = new Rect(0, 0, (int)(scale * wi), (int)(scale * hi));
drawable.setBounds(bounds);
return drawable;
}
有两种方法可以使用XML或Java。 如果它是静态的，不需要更改，那么可以在XML中初始化。
android:drawableLeft="@drawable/cloud_up"
android:drawablePadding="5sp"
现在如果你需要动态地改变图标，那么你可以通过 根据事件调用图标
textViewContext.setText("File Uploaded");
textViewContext.setCompoundDrawablesWithIntrinsicBounds(R.drawable.uploaded, 0, 0, 0);
一个Kotlin扩展+一些填充周围的可绘制
fun TextView.addLeftDrawable(drawable: Int, padding: Int = 32) {
val imgDrawable = ContextCompat.getDrawable(context, drawable)
compoundDrawablePadding = padding
setCompoundDrawablesWithIntrinsicBounds(imgDrawable, null, null, null)
}
