dolphin/Source/Android/app/build.gradle

apply plugin: 'com.android.application'

android {
    compileSdkVersion 21
    buildToolsVersion "22.0.1"

    lintOptions {
        // This is important as it will run lint but not abort on error
        // Lint has some overly obnoxious "errors" that should really be warnings
        abortOnError false
    }

    defaultConfig {
        // TODO If this is ever modified, change application_id in strings.xml
        applicationId "org.dolphinemu.dolphinemu"
        minSdkVersion 21
        targetSdkVersion 21

        // TODO This should be set to the Buildbot build number for release builds, and be "1" for debug builds.
        versionCode 13

        // TODO This should be set to the string currently provided by NativeLibrary.GetVersionString().
        versionName "0.13"
    }

    signingConfigs {
        release {
            if (project.hasProperty('keystore')) {
                storeFile file(project.property('keystore'))
                storePassword project.property('storepass')
                keyAlias project.property('keyalias')
                keyPassword project.property('keypass')
            }
        }
    }

    // Define build types, which are orthogonal to product flavors.
    buildTypes {
        // Signed by release key, allowing for upload to Play Store.
        release {
            signingConfig signingConfigs.release
        }

        // Signed by debug key disallowing distribution on Play Store.
        // Attaches 'debug' suffix to version and package name, allowing installation alongside the release build.
        debug {
            // TODO If this is ever modified, change application_id in debug/strings.xml
            applicationIdSuffix ".debug"
            versionNameSuffix '-debug'
            jniDebuggable true

            tasks.withType(JavaCompile) {
                compileTask -> compileTask.dependsOn(compileNative)
            }
        }
    }

    // Define product flavors, which can be split into categories. Common examples
    // of product flavors are paid vs. free, ARM vs. x86, etc.
    productFlavors {
        arm_64 {
            flavorDimension "abi"
            ndk {
                abiFilter "arm64-v8a"
            }
        }

        x86_64 {
            flavorDimension "abi"
            ndk {
                abiFilter "x86_64"
            }
        }
    }
}

dependencies {

    compile 'com.android.support:support-v4:22.1.1'
    compile 'com.android.support:support-v13:22.0.0'
    compile 'com.android.support:cardview-v7:21.0.3'
    compile 'com.android.support:recyclerview-v7:21.0.3'

    // For showing the banner as a circle a-la Material Design Guidelines
    compile 'de.hdodenhof:circleimageview:1.2.2'

    // For loading huge screenshots from the disk.
    compile 'com.squareup.picasso:picasso:2.5.2'
}

task setupCMake(type: Exec) {
    // Check if a build properties file exists.
    def propsFile = rootProject.file("build.properties")

    // If it does, call CMake.
    if (propsFile.canRead()) {
        // Read the properties file's contents.
        def buildProperties = new Properties()
        buildProperties.load(new FileInputStream(propsFile))

        String abi = getAbi()

        mkdir('build/' + abi)
        workingDir 'build/' + abi

        executable getExecutablePath("cmake")

        args "-DANDROID=true",
                "-DANDROID_NATIVE_API_LEVEL=android-18",
                "-DCMAKE_TOOLCHAIN_FILE=../../../android.toolchain.cmake",
                "../../../../..",
                "-DGIT_EXECUTABLE=" + getExecutablePath("git"),
                "-DANDROID_NDK=" + getNdkPath(),
                "-DANDROID_TOOLCHAIN_NAME=" + getToolchainName(),
                "-DANDROID_ABI=" + abi
    } else {
        executable 'echo'
        args 'No build.properties found; skipping CMake.'
    }
}

task compileNative(type: Exec, dependsOn: 'setupCMake') {
    // Check if a build properties file exists.
    def propsFile = rootProject.file("build.properties")

    // If it does, call make.
    if (propsFile.canRead()) {
        // Read the properties file's contents.
        def buildProperties = new Properties()
        buildProperties.load(new FileInputStream(propsFile))

        String abi = getAbi()

        workingDir 'build/' + abi

        executable 'make'

        args buildProperties.makeArgs
    } else {
        executable 'echo'
        args 'No build.properties found; skipping native build.'
    }
}

String getExecutablePath(String command) {
    def propsFile = rootProject.file("build.properties")
    def path = null
    if (propsFile.canRead()) {
        def buildProperties = new Properties()
        buildProperties.load(new FileInputStream(propsFile))
        println buildProperties
        path = buildProperties[command + "Path"]
    }
    if (path == null) {
        try {
            def stdout = new ByteArrayOutputStream()

            exec {
                commandLine 'which', command
                standardOutput = stdout
            }

            path = stdout.toString().trim()
        } catch (ignored) {
            project.logger.error("Gradle error: Couldn't find " + command + " executable.")
        }
    }
    if (path != null) {
        project.logger.quiet("Gradle: Found " + command + " executuable:" + path)
    }
    return path
}

String getNdkPath() {
    def propsFile = rootProject.file("build.properties")
    def ndkPath = null
    if (propsFile.canRead()) {
        def buildProperties = new Properties()
        buildProperties.load(new FileInputStream(propsFile))
        ndkPath = buildProperties.ndkPath
    }
    if (ndkPath == null) {
        try {
            def stdout = new ByteArrayOutputStream()

            exec {
                // ndk-build.cmd is a file unique to the root directory of android-ndk-r10e.
                commandLine 'locate', 'ndk-build.cmd'
                standardOutput = stdout
            }

            def ndkCmdPath = stdout.toString()
            ndkPath = ndkCmdPath.substring(0, ndkCmdPath.lastIndexOf('/'))
        } catch (ignored) {
            project.logger.error("Gradle error: Couldn't find NDK.")
        }
    }
    if (ndkPath != null) {
        project.logger.quiet("Gradle: Found Android NDK: " + ndkPath)
    }
    return ndkPath
}

String getAbi() {
    String taskName = getGradle().startParameter.taskNames[0]
    String abi;

    if (taskName == null) {
        return ""
    }

    project.logger.quiet("Gradle: Build = " + taskName)

    if (taskName.contains("Arm_64")) {
        abi = "arm64-v8a"
    } else if (taskName.contains("Arm")) {
        abi = "armeabi-v7a"
    } else if (taskName.contains("X86_64")) {
        abi = "x86_64"
    }

    project.logger.quiet("Gradle: ABI name: " + abi)
    return abi;
}

String getToolchainName() {
    String taskName = getGradle().startParameter.taskNames[0]
    String toolchain;

    if (taskName == null) {
        return ""
    }

    if (taskName.contains("Arm_64")) {
        toolchain = "aarch64-linux-android-4.9"
    } else if (taskName.contains("Arm")) {
        toolchain = "arm-linux-androideabi-4.9"
    } else if (taskName.contains("X86_64")) {
        toolchain = "x86_64-4.9"
    }

    project.logger.quiet("Gradle: ABI name: " + toolchain)
    return toolchain;
}