Implement a proguard file to keep things clean

Dropbox runs wild with 20,000 methods otherwise

shell/android-studio/reicast/build.gradle

@@ -58,7 +58,7 @@ android {
         }
         release {
             debuggable false
-            minifyEnabled false
+            minifyEnabled true
             zipAlignEnabled true
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
             signingConfig signingConfigs.release

shell/android-studio/reicast/proguard-rules.txt

@@ -0,0 +1,66 @@
+# This is a configuration file for ProGuard.
+# http://proguard.sourceforge.net/index.html#manual/usage.html
+# Optimizations: If you don't want to optimize, use the
+# proguard-android.txt configuration file instead of this one, which
+# turns off the optimization flags.  Adding optimization introduces
+# certain risks, since for example not all optimizations performed by
+# ProGuard works on all versions of Dalvik.  The following flags turn
+# off various optimizations known to have issues, but the list may not
+# be complete or up to date. (The "arithmetic" optimization can be
+# used if you are only targeting Android 2.0 or later.)  Make sure you
+# test thoroughly if you go this route.
+-optimizations !code/simplification/arithmetic,!code/simplification/cast,!field/*,!class/merging/*
+-optimizationpasses 5
+-allowaccessmodification
+-dontpreverify
+# The remainder of this file is identical to the non-optimized version
+# of the Proguard configuration file (except that the other file has
+# flags to turn off optimization).
+-dontusemixedcaseclassnames
+-dontskipnonpubliclibraryclasses
+-verbose
+-keepattributes *Annotation*
+# For native methods, see http://proguard.sourceforge.net/manual/examples.html#native
+-keepclasseswithmembernames class * {
+    native <methods>;
+}
+# keep setters in Views so that animations can still work.
+# see http://proguard.sourceforge.net/manual/examples.html#beans
+-keepclassmembers public class * extends android.view.View {
+   void set*(***);
+   *** get*();
+}
+# We want to keep methods in Activity that could be used in the XML attribute onClick
+-keepclassmembers class * extends android.app.Activity {
+   public void *(android.view.View);
+}
+# For enumeration classes, see http://proguard.sourceforge.net/manual/examples.html#enumerations
+-keepclassmembers enum * {
+    public static **[] values();
+    public static ** valueOf(java.lang.String);
+}
+-keepclassmembers class * implements android.os.Parcelable {
+  public static final android.os.Parcelable$Creator CREATOR;
+}
+-keepclassmembers class **.R$* {
+    public static <fields>;
+}
+
+# The support library contains references to newer platform versions.
+# Don't warn about those in case this app is linking against an older
+# platform version.  We know about them, and they are safe.
+-dontwarn android.support.**
+-dontwarn okio.**
+-dontwarn okhttp3.**
+-dontwarn com.squareup.okhttp.**
+-dontwarn com.google.appengine.**
+-dontwarn java.io.**
+-dontwarn java.nio.file.**
+-dontwarn javax.naming.**
+-dontwarn javax.servlet.**
+-dontwarn junit.textui.**
+
+-keepattributes Signature
+-keepattributes InnerClasses
+
+-keepattributes Exceptions,SourceFile,LineNumberTable

shell/android-studio/reicast/src/main/java/com/reicast/emulator/dropbox/CloudFragment.java

@@ -16,7 +16,6 @@ import android.content.SharedPreferences;
 import android.net.Uri;
 import android.os.AsyncTask;
 import android.os.Bundle;
-import android.os.DropBoxManager;
 import android.os.Environment;
 import android.preference.PreferenceManager;
 import android.support.v4.app.Fragment;
@@ -46,7 +45,6 @@ import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
-import java.util.concurrent.TimeUnit;
 
 
 public class CloudFragment extends Fragment {
@@ -77,7 +75,17 @@ public class CloudFragment extends Fragment {
 				Environment.getExternalStorageDirectory().getAbsolutePath());
 		buttonListener();
 		confirmDialog = new AlertDialog.Builder(getActivity());
-		Auth.startOAuth2Authentication(getActivity(), APP_KEY);
+//		Auth.startOAuth2Authentication(getActivity(), APP_KEY);
+		String accessToken = mPrefs.getString("access-token", null);
+		if (accessToken != null) {
+			DropboxClientFactory.init(accessToken);
+		} else {
+			accessToken = Auth.getOAuth2Token();
+			if (accessToken != null) {
+				mPrefs.edit().putString("access-token", accessToken).apply();
+				DropboxClientFactory.init(accessToken);
+			}
+		}
 	}
 
 	public void buttonListener() {