How to use the new manifest merger (of Android Studio and Gradle)?

只谈情不闲聊 提交于 2019-11-29 21:31:38
Eugen Pechanec

1. Disabling elements

You can always explicitly disable permissions and features in your app's manifest and override any library values. And i found that you can disable elements from library.

Example

Consider the following code from the above link:

<activity-alias
    android:name=”foo.bar.alias”>
  <meta-data 
      android:name=”zoo” 
      tools:node=”remove”/>
</activity-alias>

By having this code inside your manifest you ensure that the merger finds any <activity-alias> elements with android:name="foo.bar.alias" attribute and removes a <meta-data> element if it has the android:name="zoo" attribute. It removes just the "zoo" meta data. Not the activity alias. If you specify this in your main manifest it will be effective on anything that has been merged so far (elements from libraries).

Example #2

Since you requested an example with activities, this is what I've come up with:

<activity android:name="com.example.ui.MyActivity" tools:node="remove"/>

This line will make the merger remove any activities with android:name="com.example.ui.MyActivity" attribute that have been merged so far. So if you specify this in your main manifest it will effectively remove any com.example.ui.MyActivity entries that might have been merged from libraries.

2. Overriding attributes from library

The order in which the values are merged are described here in section Manifest files ordering. Basically it goes like this: libraries, then main manifest, then flavors and build types manifests if you use those. How to override attributes from library?

What are build types?

The default are "debug" and "release". You can define your own and override settings like signing or proguard. For your purposes you could say it's the equivalent of run configurations.

It works like this: you put your default and shared values inside the main manifest. Then in flavor manifests you override the values you need. Google "gradle flavors" for more info.

3. Disabling manifest merger altogether

Disable Manifest Merger in Android Gradle Build

android.applicationVariants.all { variant ->
    variant.processResources.manifestFile = file('src/main/AndroidManifest.xml')
    variant.processManifest.enabled=false
}

In what file do you put this?

At the end of your module's (not root project) build.gradle.

4. Are manifests from dependencies merged?

Yes they are (they're libraries).

Is there a way to block merging certain library manifests?

Not that I know of, sorry.

5. Any tutorials?

Depends on what are you trying to achive. So far it always worked for me out-of-the-box.

I don't know about any videos.

6. Anything I should be aware of?

You can check the generated manifest if you get suspicious about extra permissions etc. It's located in project/module/build/intermediates/manifests/full/[flavor]/build-type/AndroidManifest.xml.

Sauce: http://tools.android.com/tech-docs/new-build-system/user-guide/manifest-merger

Some of the links in this thread are obsolete. Here's the main one that is updated related to auto merger of manifests, by gradle, for Android AARs.

https://developer.android.com/studio/build/manifest-merge

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