«» Java, , — , . DSL Android !
Java .
float dp = getResources().getDisplayMetrics().density;
FrameLayout root = new FrameLayout(this);
root.setBackgroundColor(RED);
root.setLayoutParams(
new ViewGroup.LayoutParams(
MATCH_PARENT,
(int)(100f*dp)));
FrameLayout child = new FrameLayout(this);
child.setBackgroundColor(GREEN);
FrameLayout.LayoutParams childParams =
new FrameLayout.LayoutParams(
(int)(50f*dp),
(int)(50f*dp));
childParams.gravity = CENTER;
child.setLayoutParams(childParams);
root.addView(child);
:
, ( ). , . 3 , , , . , , , - ?
Java ? — xml Java.
xml
3.
— .
Android , inflate findViewById? , .
— .
<FrameLayout
android:background="#f00"
android:layout_width="match_parent"
android:layout_height="100dp">
<FrameLayout
android:background="#0f0"
android:layout_gravity="center"
android:layout_width="50dp"
android:layout_height="50dp"/>
</FrameLayout>
, «android:», .
— .
, 10dp.
<ImageView
android:layout_width="@dimen/avatarSide"
android:layout_height="@dimen/avatarSide"/>
<TextView
android:layout_width="@dimen/avatarSide + 10dp"
android:layout_height="wrap_content"/>
xml .
Anko?
Anko — DSL, Kotlin.
frameLayout {
backgroundColor = RED
frameLayout {
backgroundColor = GREEN
}.lparams(dip(50), dip(50)) {
gravity = CENTER
}
}.lparams(matchParent, dip(100))
, Java!
, , , . 500 — , — .
JAnko
, Java .
new frameLayout(this) {{
new lparams(this) {{
width = MATCH_PARENT;
height = dip(100);
}}._();
backgroundColor = RED;
new frameLayout(this) {{
new lparams(this) {{
width = dip(50);
height = dip(50);
gravity = CENTER;
}}._();
backgroundColor = GREEN;
}}._();
}}._();
. -.
class A {
// block
{
// some code
}
}
Java , .
.
new imageView(this) {{
new lparams(this) {{
width = dimen(R.dimen.avatarSide);
height = dimen(R.dimen.avatarSide);
}}._();
}}._();
new textView(this) {{
new lparams(this) {{
width = dimen(R.dimen.avatarSide) + dip(10);
height = WRAP_CONTENT;
}}._();
}}._();
.
scala. proof of concept — .
0). Kotlin :
object : frameLayout(this) {
init {
object : lparams(this) {
init {
width = MATCH_PARENT
height = dip(100f)
}
}.`_`()
backgroundColor = RED
object : frameLayout(this) {
init {
object : lparams(this) {
init {
width = dip(50f)
height = dip(50f)
gravity = CENTER
}
}.`_`()
backgroundColor = GREEN
}
}.`_`()
}
}.`_`()
1) aar 12
2) Idea
3) Java Java
Anko, .
, - , Litho, measurment layout . eirnym .