Enable ProGuard

app/build.gradle

@@ -2,6 +2,7 @@ apply plugin: 'com.android.application'
 
 android {
     compileSdkVersion 28
+
     defaultConfig {
         applicationId "space.rocketnine.gophast"
 
@@ -13,9 +14,16 @@ android {
 
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
     }
+
     buildTypes {
-        release {
+        debug {
             minifyEnabled false
+            shrinkResources false
+        }
+
+        release {
+            minifyEnabled true
+            shrinkResources true
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }

app/src/main/java/space/rocketnine/gophast/AboutActivity.java

@@ -4,8 +4,8 @@ import android.content.Intent;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.net.Uri;
-import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
 import android.view.View;
 import android.widget.TextView;
 
@@ -32,7 +32,7 @@ public class AboutActivity extends AppCompatActivity {
 
         String goPhastVersion = manager.Manager.getGoPhastVersion();
         if (goPhastVersion.trim().isEmpty()) {
-           goPhastVersion = "?";
+            goPhastVersion = "?";
         }
 
         TextView txtAboutSubTitle = findViewById(R.id.txtAboutSubTitle);

app/src/main/java/space/rocketnine/gophast/Download.java

@@ -1,11 +1,8 @@
 package space.rocketnine.gophast;
 
 import android.net.Uri;
-import android.os.Environment;
 import android.webkit.MimeTypeMap;
 
-import java.io.File;
-
 public class Download {
     int Index;
     long ID;

app/src/main/java/space/rocketnine/gophast/DownloadRunnable.java

@@ -1,7 +1,5 @@
 package space.rocketnine.gophast;
 
-import android.app.Activity;
-import android.app.DownloadManager;
 import android.net.Uri;
 import android.os.Build;
 import android.os.Handler;

app/src/main/java/space/rocketnine/gophast/GoPhast.java

@@ -93,8 +93,6 @@ public class GoPhast extends Application {
         downloads.add(download);
         updateDownloadIndexes();
 
-        download.Index = downloads.size() - 1;
-
         download.Path = Uri.fromFile(new File(getDownloadDir(), download.Name));
         Log.d("gophast", "Add index " + download.Index);
 

app/src/main/java/space/rocketnine/gophast/MainActivity.java

@@ -11,7 +11,6 @@ import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.DividerItemDecoration;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
-import android.util.Log;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
@@ -20,7 +19,6 @@ import android.widget.EditText;
 
 public class MainActivity extends AppCompatActivity {
     private GoPhast gophast;
-    private boolean startedSettings;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {

app/src/main/java/space/rocketnine/gophast/SettingsActivity.java

@@ -2,7 +2,6 @@ package space.rocketnine.gophast;
 
 import android.annotation.TargetApi;
 import android.app.Activity;
-import android.content.ContentResolver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.res.Configuration;
@@ -13,15 +12,12 @@ import android.preference.Preference;
 import android.preference.PreferenceActivity;
 import android.preference.PreferenceCategory;
 import android.preference.PreferenceFragment;
-import android.provider.DocumentsContract;
 import android.support.annotation.LayoutRes;
 import android.support.annotation.Nullable;
-import android.support.v4.provider.DocumentFile;
 import android.support.v7.app.ActionBar;
 import android.support.v7.app.AppCompatDelegate;
 import android.support.v7.widget.Toolbar;
 import android.text.format.Formatter;
-import android.util.Log;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
@@ -318,7 +314,7 @@ public class SettingsActivity extends PreferenceActivity {
         if (requestCode == RequestDownloadDir && resultCode == Activity.RESULT_OK) {
             // Use the provided utility method to parse the result
             List<Uri> files = Utils.getSelectedFilesFromResult(intent);
-            for (Uri uri: files) {
+            for (Uri uri : files) {
                 File file = Utils.getFileForUri(uri);
 
                 getApp().getPrefs().edit().putString("pref_downloaddir", file.getAbsolutePath()).apply();

app/src/main/res/values/strings.xml

@@ -5,7 +5,7 @@
     <string name="invalidURL">Invalid URL</string>
     <string name="url">URL</string>
     <string name="settings">Settings</string>
-    <string name="directory">Directory</string>
+    <string name="saveFilesTo">Save files to</string>
     <string name="minsplitsize">Minimum split size</string>
     <string name="maxconnections">Maximum connections</string>
     <string name="maxconnections_summary">%s per server</string>

app/src/main/res/xml/pref_download.xml

@@ -1,10 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
 
-    <Preference
-        android:key="pref_downloaddir"
-        android:title="@string/directory" />
-
     <EditTextPreference
         android:defaultValue="3"
         android:key="pref_maxconnections"
@@ -15,4 +11,8 @@
         android:key="pref_minsplitsize"
         android:title="@string/minsplitsize" />
 
+    <Preference
+        android:key="pref_downloaddir"
+        android:title="@string/saveFilesTo" />
+
 </PreferenceScreen>

gradle.properties

@@ -11,5 +11,3 @@ org.gradle.jvmargs=-Xmx1536m
 # This option should only be used with decoupled projects. More details, visit
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
 # org.gradle.parallel=true
-
-