Switched build system to gradle

brouter-routing-app/build.gradle

@@ -0,0 +1,34 @@
+plugins {
+    id 'com.android.application'
+}
+
+android {
+    compileSdkVersion 29
+
+    defaultConfig {
+        applicationId "btools.routingapp"
+        minSdkVersion 10
+        targetSdkVersion 29
+        versionCode 41
+        versionName "1.6.1"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+
+    implementation project(':brouter-mapaccess')
+    implementation project(':brouter-core')
+    implementation project(':brouter-expressions')
+    implementation project(':brouter-util')
+}