use gradle to build the owncloud-android-lib

this will allow using current android SDK tools & emulator

Change-Id: Ic7f9996a36e4af2a5cad07e28c8830b8df12aa44

android/source/build.gradle

+apply plugin: 'com.android.application'
+// buildhost settings - paths and the like
+apply from: 'liboSettings.gradle'
+
 project.ext.set("archivesBaseName", "LibreOfficeViewer")
 allprojects {
     repositories {
         maven {
             url "https://maven.google.com"
         }
+        flatDir {
+            dirs "${liboWorkdir}/UnpackedTarball/owncloud_android_lib/build/outputs/aar"
+        }
     }
 }
 //build-time dependencies - android plugin for gradle
@@ -16,10 +23,6 @@ buildscript {
     }
 }
 
-apply plugin: 'com.android.application'
-// buildhost settings - paths and the like
-apply from: 'liboSettings.gradle'
-
 // compile-time dependencies
 dependencies {
     compile fileTree(dir: "${liboInstdir}/${liboUREJavaFolder}", include: [
@@ -30,7 +33,8 @@ dependencies {
             "unoloader.jar"
     ])
     compile files("${liboInstdir}/${liboShareJavaFolder}/unoil.jar")
-    compile files("${liboWorkdir}/UnpackedTarball/owncloud_android_lib/bin/owncloud-android-library.jar")
+    debugCompile(name:'owncloud_android_lib-debug', ext:'aar')
+    releaseCompile(name:'owncloud_android_lib-release', ext:'aar')
     compile 'com.android.support:design:26.1.0' // also pulls-in corresponding support libraries
     compile 'com.android.support.constraint:constraint-layout:1.0.2'
 }

external/owncloud-android-lib/ExternalProject_owncloud_android_lib.mk

@@ -15,11 +15,7 @@ $(eval $(call gb_ExternalProject_register_targets,owncloud_android_lib,\
 
 $(call gb_ExternalProject_get_state_target,owncloud_android_lib,build) :
 	$(call gb_ExternalProject_run,build,\
-	$(ICECREAM_RUN) "$(ANT)" \
-		$(if $(verbose),-v,-q) \
-		-f build.xml \
-		-Dsdk.dir=$(ANDROID_SDK_HOME) -Dtarget=android-22 \
-		release \
+	ANDROID_HOME=$(ANDROID_SDK_HOME) $(SRCDIR)/android/source/gradlew assemble \
 	)
 
 # vim: set noet sw=4 ts=4:

external/owncloud-android-lib/UnpackedTarball_owncloud_android_lib.mk

@@ -11,4 +11,6 @@ $(eval $(call gb_UnpackedTarball_UnpackedTarball,owncloud_android_lib))
 
 $(eval $(call gb_UnpackedTarball_set_tarball,owncloud_android_lib,$(OWNCLOUD_ANDROID_LIB_TARBALL)))
 
+$(eval $(call gb_UnpackedTarball_add_file,owncloud_android_lib,build.gradle,external/owncloud-android-lib/build.gradle))
+
 # vim: set noet sw=4 ts=4:

external/owncloud-android-lib/build.gradle

+apply plugin: 'com.android.library'
+buildscript {
+    repositories {
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:2.3.3'
+    }
+}
+
+android {
+    useLibrary 'org.apache.http.legacy'
+
+    compileOptions {
+        encoding 'ISO8859-1'
+        sourceCompatibility JavaVersion.VERSION_1_7
+        targetCompatibility JavaVersion.VERSION_1_7
+    }
+
+    compileSdkVersion 26
+    buildToolsVersion "26.0.1"
+
+    defaultConfig {
+        minSdkVersion 14
+        targetSdkVersion 24
+    }
+
+    sourceSets {
+        main {
+            manifest.srcFile 'AndroidManifest.xml'
+            java {
+                srcDirs = [
+                    'libs/commons-codec-1.9/src/main/java',
+                    'libs/commons-httpclient-3.1/src/java',
+                    'libs/jackrabbit-webdav-2.7.2/src/main/java',
+                    'libs/slf4j-1.7.12/src/java',
+                    'libs/tomcat-7.0.40/java',
+                    'src'
+                ]
+            }
+            resources {
+                srcDirs = [
+                    'libs/tomcat-7.0.40/java',
+                    'libs/jackrabbit-webdav-2.7.2/src/main/java'
+                ]
+            }
+        }
+    }
+}