initial cut at an example Android application that uses Proguard with Gson

examples/android-proguard-example/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+  package="com.google.gson.examples.android"
+  android:versionCode="1"
+  android:versionName="1.0">
+  <uses-sdk android:minSdkVersion="3"/>
+  <application android:icon="@drawable/icon" android:label="@string/app_name">
+    <activity android:name=".GsonProguardExampleActivity" 
+              android:label="@string/app_name" 
+              android:exported="true" 
+              android:icon="@drawable/icon"
+              android:configChanges="keyboardHidden|orientation" 
+              android:enabled="true">
+      <intent-filter>
+        <action android:name="android.intent.action.MAIN" />
+        <category android:name="android.intent.category.LAUNCHER" />
+      </intent-filter>
+    </activity>
+  </application>
+  <uses-permission android:name="android.permission.INTERNET" />
+</manifest> 

examples/android-proguard-example/default.properties

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+# This file is automatically generated by Android Tools.
+# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
+#
+# This file must be checked in Version Control Systems.
+#
+# To customize properties used by the Ant build system use,
+# "build.properties", and override values to adapt the script to your
+# project structure.
+
+# Project target.
+target=android-3
+proguard.config=proguard.cfg

examples/android-proguard-example/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>com.google.code.gson</groupId>
+  <artifactId>android-proguard-example</artifactId>
+  <packaging>apk</packaging>
+  <version>1.0-SNAPSHOT</version>
+  <name>android-proguard-example</name>
+  <url>http://code.google.com/p/google-gson/trunk/examples/android</url>
+  <description>An example illustrating using Gson and Progaurd in an Android application</description>
+  <parent>
+    <groupId>org.sonatype.oss</groupId>
+    <artifactId>oss-parent</artifactId>
+    <version>5</version>
+  </parent>
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    <android.sdk.path>${env.ANDROID_HOME}/</android.sdk.path>
+  </properties>
+
+  <licenses>
+    <license>
+      <name>The Apache Software License, Version 2.0</name>
+      <url>http://www.apache.org/licenses/LICENSE-2.0.txt</url>
+      <distribution>repo</distribution>
+    </license>
+  </licenses>
+  <scm>
+    <connection>scm:svn:http://google-gson.googlecode.com/svn/trunk/examples/android</connection>
+    <developerConnection>scm:svn:https://google-gson.googlecode.com/svn/trunk/examples/android</developerConnection>
+    <url>http://google-gson.codegoogle.com/trunk/examples/android</url>
+  </scm>
+  <issueManagement>
+    <system>Google Code Issue Tracking</system>
+    <url>http://code.google.com/p/google-gson/issues/list</url>
+  </issueManagement>
+  <dependencies>
+    <dependency>
+      <groupId>com.google.android</groupId>
+      <artifactId>android</artifactId>
+      <version>1.5_r4</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>com.google.code.gson</groupId>
+      <artifactId>gson</artifactId>
+      <version>1.8-SNAPSHOT</version>
+      <scope>provided</scope>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>com.jayway.maven.plugins.android.generation2</groupId>
+        <artifactId>maven-android-plugin</artifactId>
+        <version>2.9.0-beta-4</version>
+        <configuration>
+          <sdk>
+            <path>${env.ANDROID_HOME}/</path>
+            <platform>1.5</platform>
+          </sdk>
+          <deleteConflictingFiles>true</deleteConflictingFiles>
+        </configuration>
+        <extensions>true</extensions>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>2.3.2</version>
+        <configuration>
+          <source>1.6</source>
+          <target>1.6</target>
+        </configuration>
+      </plugin>
+      <plugin>
+      	<groupId>org.apache.maven.plugins</groupId>
+      	<artifactId>maven-eclipse-plugin</artifactId>
+      	<version>2.8</version>
+      	<configuration>
+      		<downloadSources>true</downloadSources>
+      		<downloadJavadocs>true</downloadJavadocs>
+      		<workspace>../../eclipse-ws</workspace>
+      		<workspaceCodeStylesURL>
+      			file:///${basedir}/../lib/formatting-styles.xml
+      		</workspaceCodeStylesURL>
+      	</configuration>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-jar-plugin</artifactId>
+        <version>2.3.1</version>
+        <executions>
+          <execution>
+            <goals>
+              <goal>test-jar</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-source-plugin</artifactId>
+        <version>2.1.2</version>
+        <executions>
+          <execution>
+            <id>attach-sources</id>
+            <goals>
+              <goal>jar</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-javadoc-plugin</artifactId>
+        <version>2.7</version>
+        <executions>
+          <execution>
+            <id>attach-javadocs</id>
+            <goals>
+              <goal>jar</goal>
+            </goals>
+          </execution>
+        </executions>
+        <configuration>
+          <links>
+            <link>http://download.oracle.com/javase/1.5.0/docs/api/</link>
+          </links>
+          <version>true</version>
+          <show>public</show>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+  <developers>
+    <developer>
+      <name>Inderjeet Singh</name>
+    </developer>
+  </developers>
+</project>

examples/android-proguard-example/proguard.cfg

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+-optimizationpasses 5
+-dontusemixedcaseclassnames
+-dontskipnonpubliclibraryclasses
+-dontskipnonpubliclibraryclassmembers
+-dontpreverify
+-verbose
+-dump class_files.txt 
+-printseeds seeds.txt 
+-printusage unused.txt 
+-printmapping mapping.txt 
+-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*
+
+-allowaccessmodification
+-keepattributes *Annotation*
+-renamesourcefileattribute SourceFile
+-keepattributes SourceFile,LineNumberTable
+
+-keep public class * extends android.app.Activity
+-keep public class * extends android.app.Application
+-keep public class * extends android.app.Service
+-keep public class * extends android.content.BroadcastReceiver
+-keep public class * extends android.content.ContentProvider
+-keep public class * extends android.app.backup.BackupAgentHelper
+-keep public class * extends android.preference.Preference
+-keep public class com.android.vending.licensing.ILicensingService
+-dontnote com.android.vending.licensing.ILicensingService
+
+# Explicitly preserve all serialization members. The Serializable interface
+# is only a marker interface, so it wouldn't save them.
+-keepclassmembers class * implements java.io.Serializable {
+    static final long serialVersionUID;
+    private static final java.io.ObjectStreamField[] serialPersistentFields;
+    private void writeObject(java.io.ObjectOutputStream);
+    private void readObject(java.io.ObjectInputStream);
+    java.lang.Object writeReplace();
+    java.lang.Object readResolve();
+}
+
+# Preserve all native method names and the names of their classes.
+-keepclasseswithmembernames class * {
+    native <methods>;
+}
+
+-keepclasseswithmembernames class * {
+    public <init>(android.content.Context, android.util.AttributeSet);
+}
+
+-keepclasseswithmembernames class * {
+    public <init>(android.content.Context, android.util.AttributeSet, int);
+}
+
+# Preserve static fields of inner classes of R classes that might be accessed
+# through introspection.
+-keepclassmembers class **.R$* {
+  public static <fields>;
+}
+
+# Preserve the special static methods that are required in all enumeration classes.
+-keepclassmembers enum * {
+    public static **[] values();
+    public static ** valueOf(java.lang.String);
+}
+
+-keep class * implements android.os.Parcelable {
+  public static final android.os.Parcelable$Creator *;
+}
+
+# Gson specific classes
+-keep class sun.misc.Unsafe.** { *; }

examples/android-proguard-example/res/layout/main.xml

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+<?xml version="1.0" encoding="utf-8"?>
+
+<LinearLayout
+  xmlns:android="http://schemas.android.com/apk/res/android" 
+  android:orientation="vertical"
+  android:layout_width="fill_parent"
+  android:layout_height="fill_parent">
+  
+  <TextView android:id="@+id/tv"
+    android:layout_width="fill_parent"
+    android:layout_height="wrap_content" />
+</LinearLayout>

examples/android-proguard-example/res/values/strings.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+  <string name="app_name">Gson Proguard Example</string>
+</resources>
+

examples/android-proguard-example/src/com/google/gson/examples/android/GsonProguardExampleActivity.java

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+/*
+ * Copyright (C) 2011 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.google.gson.examples.android;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.widget.TextView;
+
+/**
+ * Activity class illustrating how to use proguard with Gson
+ *
+ * @author Inderjeet Singh
+ */
+public class GsonProguardExampleActivity extends Activity {
+  @Override
+  public void onCreate(Bundle icicle) {
+    super.onCreate(icicle);
+    setContentView(R.layout.main);
+    TextView tv = (TextView) findViewById(R.id.tv);
+    tv.setText("Hello World");
+    tv.invalidate();
+  }
+}