Added ability to build releases with gradle

.gitignore

@@ -41,3 +41,4 @@ proguard
 libs
 *.DS_Store
 src/de/danoeh/antennapod/util/flattr/FlattrConfig.java
+gradle.properties

build.gradle

@@ -35,6 +35,31 @@ android {
         testInstrumentationRunner "instrumentationTest.de.test.antennapod.AntennaPodTestRunner"
     }
 
+    signingConfigs {
+        releaseConfig {
+            if (project.hasProperty('releaseStoreFile')) {
+                storeFile file(releaseStoreFile)
+            } else {
+                storeFile file('keystore')
+            }
+            if (project.hasProperty('releaseStorePassword')) {
+                storePassword releaseStorePassword
+            } else {
+                storePassword "password"
+            }
+            if (project.hasProperty('releaseKeyAlias')) {
+                keyAlias releaseKeyAlias
+            } else {
+                keyAlias "alias"
+            }
+            if (project.hasProperty('releaseKeyPassword')) {
+                keyPassword releaseKeyPassword
+            } else {
+                keyPassword "password"
+            }
+        }
+    }
+
     sourceSets {
         main {
             manifest.srcFile 'AndroidManifest.xml'
@@ -51,5 +76,10 @@ android {
         debug {
             packageNameSuffix ".debug"
         }
+        release {
+            runProguard true
+            proguardFile 'proguard.cfg'
+            signingConfig signingConfigs.releaseConfig
+        }
     }
 }

proguard.cfg

@@ -8,11 +8,6 @@
 -optimizations !code/simplification/arithmetic
 -keepattributes *Annotation*
 
-#-libraryjars libs/android-support-v4.jar 
-#-libraryjars libs/commons-lang3-3.1.jar 
-#-libraryjars libs/flattr4j-core-2.4.jar 
-#-libraryjars libs/commons-io-2.4.jar 
-
 -keep public class * extends android.app.Activity
 -keep public class * extends android.app.Application
 -keep public class * extends android.app.Service