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DFM Tips
@shoheikawano
@_shoheikawano
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Content
・Why DFM?
・Tips for adding feature with DFM
・Conclusion
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Why DFM?
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Why DFM?
・”Ability to customize how and when the feature
to be downloaded onto devices running Android
5.0”
・Reduce initial App install size
https://developer.android.com/guide/app-bundle/dynamic-delivery
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Why DFM?
0
17
34
Without DFM with DFM
Initial App Intall Size ※Estimate
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Tips
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Tips Delivery Config
Jacoco Config
R8 & DataBinding
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Tips
R8 & DataBinding
Delivery Config
Jacoco Config
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R8 & DataBinding
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R8 & DataBinding
// app/build.gradle
release {
minifyEnabled = true
}
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R8 & DataBinding
// dynamic-feature-module/build.gradle
buildFeatures {
dataBinding = true
}
// app/build.gradle
release {
minifyEnabled = true
}
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R8 & DataBinding
// dynamic-feature-module/build.gradle
buildFeatures {
dataBinding = true
}
// dynamic-feature-module/DynamicActivity.kt
DataBindingUtil.setContentView(this, layoutId)
// app/build.gradle
release {
minifyEnabled = true
}
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R8 & DataBinding
// dynamic-feature-module/build.gradle
buildFeatures {
dataBinding = true
}
// dynamic-feature-module/DynamicActivity.kt
DataBindingUtil.setContentView(this, layoutId)
Release Build
// app/build.gradle
release {
minifyEnabled = true
}
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R8 & DataBinding
//dynamic-feature-module/build.gradle
buildFeatures {
dataBinding = true
}
// DynamicActivity.kt
DataBindingUtil.setContentView(this, layoutId)
Release Build
//app/build.gradle
release {
minifyEnabled = true
} RuntimeException
java.lang.RuntimeException: Unable to start activity
ComponentInfo{...DynamicActivity}: java.lang.IllegalStateException:
DataBindingUtil.setConte… R.layout.dynamic_activity) must not be null
Caused by: java.lang.IllegalStateException: DataBindingUtil.setConte…
R.layout.dynamic_activity) must not be null
at DynamicActivity.onCreate(DynamicActivity.kt:38)
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# dynamic-feature-module/proguard-rules-dynamic-features.pro
-keep class your.dfm.package.name.DataBinderMapperImpl { *; }
https://issuetracker.google.com/issues/139046605
R8 & DataBinding
https://stackoverflow.com/questions/54404492/proguard-with-appbundle-and-data-binding-illegalstateexception
// dynamic-feature-module/build.gradle
buildTypes {
release {
proguardFiles 'proguard-rules-dynamic-features.pro'
}
}
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Tips Delivery Config
Jacoco Config
R8 & DataBinding
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Tips Delivery Config
Jacoco Config
R8 & DataBinding
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Delivery Config - Install
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Delivery Config - Apk
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Delivery Config - Apk
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Delivery Config - Apk
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// dynamic-feature-module/build.gradle
productFlavors {
flavor1 {
manifestPlaceholders = [include_fusing: true, exclude_install_time: false]
}
flavor2 {
manifestPlaceholders = [include_fusing: false, exclude_install_time: true]
}
}
...
Delivery Config - Apk
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Tips Delivery Config
Jacoco Config
R8 & DataBinding
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Tips Delivery Config
Jacoco Config
R8 & DataBinding
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Jacoco Config
// root/build.gradle
dependencies {
classpath ‘com.dicedmelon.gradle:jacoco-android:0.1.4'
}
// dynamic-feature-module/build.gradle
apply plugin: 'jacoco-android'
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Jacoco Config
// root/build.gradle
dependencies {
classpath ‘com.dicedmelon.gradle:jacoco-android:0.1.4'
}
// dfm/build.gradle
apply plugin: 'jacoco-android'
* What went wrong:
A problem occurred evaluating script.
> Failed to apply plugin [id 'jacoco-android']
> You must apply the Android plugin or the Android library plugin before
using the jacoco-android plugin
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Jacoco Config
// root/build.gradle
dependencies {
classpath ‘com.dicedmelon.gradle:jacoco-android:0.1.4'
}
// dynamic-feature-module/build.gradle
apply plugin: 'jacoco-android'
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Jacoco Config
// root/build.gradle
dependencies {
classpath ‘com.dicedmelon.gradle:jacoco-android:0.1.4'
}
// dynamic-feature-module/build.gradle
apply plugin: 'jacoco-android'
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Jacoco Config
// root/build.gradle
dependencies {
classpath ‘com.dicedmelon.gradle:jacoco-android:0.1.4'
}
// dynamic-feature-module/build.gradle
apply plugin: 'jacoco-android'
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Jacoco Config .. Alternative?
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Conclusion
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Tips
Why DFM?
— To reduce App Install Size — Keep DataBinderMapperImpl
— Configure delivery options Carefully
— Use fusing / include option for APK
— Use manifest placeholder if necessary
— Some Jacoco android gradle plugin(s)
just do not work with DFM
Conclusion
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DFM Tips
@shoheikawano
@_shoheikawano
Thank you!