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For the core library and other common info, please refer to the Delta Chat Core Library.
When checking out deltachat-android, make sure also to check out the subproject deltachat-core:
When using Git, you can do this initially by
$ git clone --recursive https://github.com/deltachat/deltachat-android
or later by
git submodule update --init --recursive. If you do this in your
home directory, this results in the folder
~/deltachat-android which is just fine.
ndk-build in the root directory to build the C-part;
this also builds deltachat-core. Afterwards run the project in Android Studio.
The project requires API 25.
With chance, that's it :) - if not, read on how to set up a proper development environment.
Some libs required by Android Studio may be missing on 64 bit Linux machines
[Source], so for Ubuntu execute
$ sudo apt-get install libc6:i386 libncurses5:i386 libstdc++6:i386 lib32z1 libbz2-1.0:i386
and for Fedora execute
$ sudo yum install zlib.i686 ncurses-libs.i686 bzip2-libs.i686.
Download Android Studio from https://developer.android.com (android-studio-ide-...-linux.zip)
and unpack the archive which contains a single folder called
move this folder e.g. to
To launch Android Studio for the first time, open a terminal, navigate to
./studio.sh and use all the standard values
from the wizard.
Android Studio now asks you if you want to download an existing project;
~/deltachat-android as created in the "Build" chapter (Android Studio starts to
build the project, however, there are some steps missing before this will
As Delta Chat uses API 25 for some reasons, click on the corresponding error message and install "Nougat 7.1.1 (API 25)" and the "Build-Tools" (you should also find the option at "Tools / Android / SDK Manager / SDK Platforms"). Now the build should succeed - but the app still misses the native part.
Agree to the terms and download Android NDK Revision 14b from
(Newer releases shall not be used currently, they are not compatible,
see issues #197, #220, #248) and extract the archive containing a single folder
android-ndk-r…; move this folder e.g. to
Export the folder path to your environment as ANDROID_NDK and add it to PATH.
You can archive this e.g. by adding the following lines to
The last two steps may be omitted by using the new Android Studio NDK options, however, thus far, we have not found the time to do so.
The user interface classes are based on the Signal messenger.
Licensed GPLv3+, see the LICENSE file for details.
Copyright © 2017-2019 Delta Chat contributors.