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# MuPDF Mini Viewer This project is a minimalist Android app that uses the MuPDF library to view PDF, XPS, CBZ, unprotected EPUB, and FB2 documents. The app will start with a file picker showing the contents of the external storage directory. Only files that it can open will be listed. Each document you open will start its own activity, so you can view many documents at once. Use the [ ] system button to switch between the file picker and any open documents and other activities you have running. Tapping on the left and right side of the screen will flip to the previous and next pages. Tapping in the middle will bring up or hide the tool bars. A long tap will toggle highlighting of links. When the links are highlighted they are also active and tappable. You can pinch to zoom in. When zoomed in, tapping will scroll to advance the next screenful of content. In the toolbar there is a button to show the table of contents, if the document has one. In EPUB and FB2 documents, there is also a menu item to pick the font size. The scrubber at the bottom allows you to quickly jump to a given page in the document. ## License MuPDF is Copyright (c) 2006-2017 Artifex Software, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU Affero General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. ## Prerequisites You need a working Android development environment, consisting of the Android SKD and the Android NDK. The easiest way is to use Android Studio to download and install the SDK and NDK. ## Building Download the project using Git: $ git clone git://git.ghostscript.com/mupdf-android-viewer-mini.git Edit the local.properties file to point to your Android SDK directory: $ echo sdk.dir=$HOME/Android/Sdk > local.properties If all tools have been installed as per the prerequisites, build the app using the gradle wrapper: $ ./gradlew assembleRelease If all has gone well, you can now find the app APKs in app/build/outputs/apk/, with one APK for each ABI. There is also a universal APK which supports all ABIs. The library component can be found in lib/build/outputs/aar/lib-release.aar. ## Running To run the app in the android emulator, first you'll need to set up an "Android Virtual Device" for the emulator. Run "android avd" and create a new device. You can also use Android Studio to set up a virtual device. Use the x86 ABI for best emulator performance. Then launch the emulator, or connect a device with USB debugging enabled: $ emulator -avd MyVirtualDevice & Then copy some test files to the device: $ adb push file.pdf /mnt/sdcard/Download Then install the app on the device: $ ./gradlew installDebug To start the installed app on the device: $ adb shell am start -n com.artifex.mupdf.mini.app/.LibraryActivity To see the error and debugging message log: $ adb logcat ## Building the JNI library locally The viewer library here is 100% pure java, but it uses the MuPDF fitz library, which provides access to PDF rendering and other low level functionality. The default is to use the JNI library artifact from the Ghostscript Maven repository. If you want to build the JNI code yourself, you will need to check out the 'jni' submodule recursively. You will also need a working host development environment with a C compiler and GNU Make. Either clone the original project with the --recursive flag, or initialize all the submodules recursively by hand: mupdf-mini $ git submodule update --init mupdf-mini $ cd jni mupdf-mini/jni $ git submodule update --init mupdf-mini/jni $ cd libmupdf mupdf-mini/jni/libmupdf $ git submodule update --init Then you need to run the 'make generate' step in the libmupdf directory: mupdf-mini/jni/libmupdf $ make generate Once this is done, the build system should pick up the local JNI library instead of using the Maven artifact. ## Release To do a release you MUST first change the package name! Do NOT use the com.artifex domain for your custom app! In order to sign a release build, you will need to create a key and a key store. $ keytool -genkey -v -keystore app/android.keystore -alias MyKey \ -validity 3650 -keysize 2048 -keyalg RSA Then add the following entries to app/gradle.properties: release_storeFile=android.keystore release_storePassword=<your keystore password> release_keyAlias=MyKey release_keyPassword=<your key password> If your keystore has been set up properly, you can now build a signed release. ## Maven The library component of this project can be packaged as a Maven artifact. The default is to create the Maven artifact in the 'MAVEN' directory. You can copy thoes files to the distribution site manually, or you can change the uploadArchives repository in build.gradle before running the uploadArchives task. $ ./gradlew uploadArchives Good Luck!
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