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/* | |
* Copyright 2020 The Android Open Source Project | |
* | |
* Licensed under the Apache License, Version 2.0 (the "License"); | |
* you may not use this file except in compliance with the License. | |
* You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, software |
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/* | |
* Copyright 2019 The Android Open Source Project | |
* | |
* Licensed under the Apache License, Version 2.0 (the "License"); | |
* you may not use this file except in compliance with the License. | |
* You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, software |
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<?xml version="1.0" encoding="utf-8"?> | |
<selector xmlns:android="http://schemas.android.com/apk/res/android"> | |
<item android:state_pressed="true"> | |
<layer-list> | |
<!-- Drop Shadow Stack --> | |
<item> | |
<shape> | |
<padding | |
android:bottom="1dp" |
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put card.xml in your drawables directory, put colors.xml in your values directory or add the colors to your colors.xml file. | |
set the background of a view to card, | |
as you can see in card.xml the drawable handles the card margin, so you don't have to add a margin to your view | |
``` xml | |
<View | |
android:layout_width="fill_parent" |
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import android.arch.lifecycle.LiveData | |
import android.arch.lifecycle.MediatorLiveData | |
import android.arch.lifecycle.MutableLiveData | |
fun <X, Y> LiveData<X>.map(func: (X?) -> Y?): MutableLiveData<Y?> { | |
return MediatorLiveData<Y>().apply { | |
addSource(this@map) { x -> value = func(x) } | |
} | |
} |