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Qt: add Android packaging support
Introduce an android directory under qt and allow one to package bitcoin-qt for Android by running make apk. Add bitcoin-qt Android build instructions.
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‎configure.ac

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@@ -734,6 +734,21 @@ case $host in
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*android*)
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dnl make sure android stays above linux for hosts like *linux-android*
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TARGET_OS=android
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case $host in
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*x86_64*)
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ANDROID_ARCH=x86_64
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;;
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*aarch64*)
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ANDROID_ARCH=arm64-v8a
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;;
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*armv7a*)
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ANDROID_ARCH=armeabi-v7a
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;;
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*i686*)
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ANDROID_ARCH=i686
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;;
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*) AC_MSG_ERROR("Could not determine Android arch") ;;
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esac
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;;
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*linux*)
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TARGET_OS=linux
@@ -1844,6 +1859,7 @@ AC_SUBST(HAVE_BUILTIN_PREFETCH)
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AC_SUBST(HAVE_MM_PREFETCH)
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AC_SUBST(HAVE_STRONG_GETAUXVAL)
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AC_SUBST(HAVE_WEAK_GETAUXVAL)
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AC_SUBST(ANDROID_ARCH)
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AC_CONFIG_FILES([Makefile src/Makefile doc/man/Makefile share/setup.nsi share/qt/Info.plist test/config.ini])
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AC_CONFIG_FILES([contrib/devtools/split-debug.sh],[chmod +x contrib/devtools/split-debug.sh])
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AM_COND_IF([HAVE_DOXYGEN], [AC_CONFIG_FILES([doc/Doxyfile])])

‎doc/README.md

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@@ -44,6 +44,7 @@ The following are developer notes on how to build Bitcoin Core on your native pl
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- [FreeBSD Build Notes](build-freebsd.md)
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- [OpenBSD Build Notes](build-openbsd.md)
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- [NetBSD Build Notes](build-netbsd.md)
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- [Android Build Notes](build-android.md)
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- [Gitian Building Guide (External Link)](https://github.com/bitcoin-core/docs/blob/master/gitian-building.md)
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Development

‎doc/build-android.md

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ANDROID BUILD NOTES
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======================
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This guide describes how to build and package the `bitcoin-qt` GUI for Android on Linux and macOS.
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## Preparation
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You will need to get the Android NDK and build dependencies for Android as described in [depends/README.md](../depends/README.md).
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## Building and packaging
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After the depends are built configure with one of the resulting prefixes and run `make && make apk` in `src/qt`.

‎src/Makefile.qt.include

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@@ -378,6 +378,20 @@ bitcoin_qt_clean: FORCE
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bitcoin_qt : qt/bitcoin-qt$(EXEEXT)
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APK_LIB_DIR = qt/android/libs/$(ANDROID_ARCH)
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QT_BASE_PATH = $(shell find ../depends/sources/ -maxdepth 1 -type f -regex ".*qtbase.*\.tar.xz")
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QT_BASE_TLD = $(shell tar tf $(QT_BASE_PATH) --exclude='*/*')
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bitcoin_qt_apk: FORCE
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mkdir -p $(APK_LIB_DIR)
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cp $(dir $(CC))../sysroot/usr/lib/$(host_alias)/libc++_shared.so $(APK_LIB_DIR)
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tar xf $(QT_BASE_PATH) -C qt/android/src/ $(QT_BASE_TLD)src/android/jar/src --strip-components=5
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tar xf $(QT_BASE_PATH) -C qt/android/src/ $(QT_BASE_TLD)src/android/java/src --strip-components=5
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tar xf $(QT_BASE_PATH) -C qt/android/res/ $(QT_BASE_TLD)src/android/java/res --strip-components=5
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cp qt/bitcoin-qt $(APK_LIB_DIR)/libbitcoin-qt.so
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cd qt/android && gradle wrapper --gradle-version=6.6.1
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cd qt/android && ./gradlew build
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ui_%.h: %.ui
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@test -f $(UIC)
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@$(MKDIR_P) $(@D)

‎src/qt/Makefile

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@@ -7,3 +7,5 @@ check: FORCE
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$(MAKE) -C .. test_bitcoin_qt_check
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bitcoin-qt bitcoin-qt.exe: FORCE
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$(MAKE) -C .. bitcoin_qt
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apk: FORCE
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$(MAKE) -C .. bitcoin_qt_apk

‎src/qt/android/AndroidManifest.xml

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<?xml version='1.0' encoding='utf-8'?>
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<manifest package="org.bitcoincore.qt" xmlns:android="http://schemas.android.com/apk/res/android" android:versionName="1.0" android:versionCode="1" android:installLocation="auto">
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<uses-sdk android:targetSdkVersion="24"/>
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<uses-permission android:name="android.permission.INTERNET" />
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<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
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<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
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<uses-feature android:glEsVersion="0x00020000" android:required="true" />
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<supports-screens android:largeScreens="true" android:normalScreens="true" android:anyDensity="true" android:smallScreens="true"/>
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<application android:hardwareAccelerated="true" android:name="org.qtproject.qt5.android.bindings.QtApplication" android:label="Bitcoin Core">
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<activity android:configChanges="orientation|uiMode|screenLayout|screenSize|smallestScreenSize|layoutDirection|locale|fontScale|keyboard|keyboardHidden|navigation|mcc|mnc|density"
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android:name="org.bitcoincore.qt.BitcoinQtActivity"
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android:label="Bitcoin Core"
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android:icon="@drawable/bitcoin"
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android:screenOrientation="unspecified"
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android:launchMode="singleTop">
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<intent-filter>
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<action android:name="android.intent.action.MAIN"/>
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<category android:name="android.intent.category.LAUNCHER"/>
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</intent-filter>
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<meta-data android:name="android.app.arguments" android:value="-testnet"/>
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<meta-data android:name="android.app.lib_name" android:value="bitcoin-qt"/>
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<meta-data android:name="android.app.repository" android:value="default"/>
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<meta-data android:name="android.app.bundle_local_qt_libs" android:value="1"/>
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<meta-data android:name="android.app.use_local_qt_libs" android:value="1"/>
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<meta-data android:name="android.app.libs_prefix" android:value="/data/local/tmp/qt/"/>
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<meta-data android:name="android.app.system_libs_prefix" android:value="/system/lib/"/>
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<meta-data android:name="android.app.background_running" android:value="true"/>
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<meta-data android:name="android.app.auto_screen_scale_factor" android:value="true"/>
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<meta-data android:name="android.app.extract_android_style" android:value="default"/>
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</activity>
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</application>
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</manifest>

‎src/qt/android/build.gradle

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buildscript {
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repositories {
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google()
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jcenter()
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}
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dependencies {
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classpath 'com.android.tools.build:gradle:3.1.0'
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}
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}
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repositories {
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google()
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jcenter()
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}
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apply plugin: 'com.android.application'
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dependencies {
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implementation fileTree(dir: 'libs', include: ['*.jar'])
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}
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android {
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compileSdkVersion androidCompileSdkVersion.toInteger()
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buildToolsVersion androidBuildToolsVersion
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sourceSets {
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main {
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manifest.srcFile 'AndroidManifest.xml'
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java.srcDirs = [qt5AndroidDir + '/src', 'src', 'java']
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aidl.srcDirs = [qt5AndroidDir + '/src', 'src', 'aidl']
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res.srcDirs = [qt5AndroidDir + '/res', 'res']
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resources.srcDirs = ['src']
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renderscript.srcDirs = ['src']
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assets.srcDirs = ['assets']
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jniLibs.srcDirs = ['libs']
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}
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}
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lintOptions {
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abortOnError false
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}
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dexOptions {
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javaMaxHeapSize '4g'
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}
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defaultConfig {
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minSdkVersion 24
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}
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}

‎src/qt/android/gradle.properties

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androidBuildToolsVersion=28.0.3
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androidCompileSdkVersion=28
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qt5AndroidDir=new File(".").absolutePath
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org.gradle.jvmargs=-Xmx4608M

‎src/qt/android/res/drawable-hdpi/bitcoin.png

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‎src/qt/android/res/drawable-ldpi/bitcoin.png

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‎src/qt/android/res/drawable-mdpi/bitcoin.png

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‎src/qt/android/res/drawable-xhdpi/bitcoin.png

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‎src/qt/android/res/drawable-xxhdpi/bitcoin.png

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‎src/qt/android/res/drawable-xxxhdpi/bitcoin.png

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‎src/qt/android/src/org/bitcoincore/qt/BitcoinQtActivity.java

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package org.bitcoincore.qt;
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import android.os.Bundle;
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import android.system.ErrnoException;
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import android.system.Os;
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import org.qtproject.qt5.android.bindings.QtActivity;
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import java.io.File;
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public class BitcoinQtActivity extends QtActivity
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{
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@Override
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public void onCreate(Bundle savedInstanceState)
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{
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final File bitcoinDir = new File(getFilesDir().getAbsolutePath() + "/.bitcoin");
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if (!bitcoinDir.exists()) {
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bitcoinDir.mkdir();
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}
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try {
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Os.setenv("QT_QPA_PLATFORM", "android", true);
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} catch (ErrnoException e) {
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e.printStackTrace();
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}
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super.onCreate(savedInstanceState);
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}
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}

‎src/qt/bitcoin.cpp

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QApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
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QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
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#if defined(QT_QPA_PLATFORM_ANDROID)
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QApplication::setAttribute(Qt::AA_DontUseNativeMenuBar);
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QApplication::setAttribute(Qt::AA_DontCreateNativeWidgetSiblings);
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QApplication::setAttribute(Qt::AA_DontUseNativeDialogs);
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#endif
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BitcoinApplication app;
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QFontDatabase::addApplicationFont(":/fonts/monospace");
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