Create PROXY IntDef to enforce values

app/src/main/java/acr/browser/lightning/constant/Constants.java

@@ -3,6 +3,11 @@
  */
 package acr.browser.lightning.constant;
 
+import android.support.annotation.IntDef;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
 import acr.browser.lightning.BuildConfig;
 
 public final class Constants {
@@ -66,6 +71,10 @@ public final class Constants {
     public static final String TAG = "Lightning";
 
     // These should match the order of @array/proxy_choices_array
+    @IntDef({NO_PROXY, PROXY_ORBOT, PROXY_I2P, PROXY_MANUAL})
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface PROXY {}
+
     public static final int NO_PROXY = 0;
     public static final int PROXY_ORBOT = 1;
     public static final int PROXY_I2P = 2;

app/src/main/java/acr/browser/lightning/fragment/GeneralSettingsFragment.java

@@ -231,7 +231,7 @@ public class GeneralSettingsFragment extends LightningPreferenceFragment impleme
         BrowserDialog.setDialogSize(mActivity, dialog);
     }
 
-    private void setProxyChoice(int choice) {
+    private void setProxyChoice(@Constants.PROXY int choice) {
         switch (choice) {
             case Constants.PROXY_ORBOT:
                 choice = ProxyUtils.setProxyChoice(choice, mActivity);
@@ -316,17 +316,22 @@ public class GeneralSettingsFragment extends LightningPreferenceFragment impleme
         picker.setTitle(getResources().getString(R.string.home));
         mHomepage = mPreferenceManager.getHomepage();
         int n;
-        if (mHomepage.startsWith(Constants.SCHEME_HOMEPAGE)) {
+        switch (mHomepage) {
+            case Constants.SCHEME_HOMEPAGE:
+                n = 0;
+                break;
+            case Constants.SCHEME_BLANK:
                 n = 1;
-        } else if (mHomepage.startsWith(Constants.SCHEME_BLANK)) {
+                break;
+            case Constants.SCHEME_BOOKMARKS:
                 n = 2;
-        } else if (mHomepage.startsWith(Constants.SCHEME_BOOKMARKS)) {
+                break;
+            default:
                 n = 3;
-        } else {
-            n = 4;
+                break;
         }
 
-        picker.setSingleChoiceItems(R.array.homepage, n - 1,
+        picker.setSingleChoiceItems(R.array.homepage, n,
             new DialogInterface.OnClickListener() {
                 @Override
                 public void onClick(DialogInterface dialog, int which) {

app/src/main/java/acr/browser/lightning/preference/PreferenceManager.java

@@ -251,8 +251,18 @@ public class PreferenceManager {
         return mPrefs.getBoolean(Name.USE_PROXY, false);
     }
 
+    @Constants.PROXY
     public int getProxyChoice() {
-        return mPrefs.getInt(Name.PROXY_CHOICE, Constants.NO_PROXY);
+        @Constants.PROXY int proxy = mPrefs.getInt(Name.PROXY_CHOICE, Constants.NO_PROXY);
+        switch (proxy) {
+            case Constants.NO_PROXY:
+            case Constants.PROXY_ORBOT:
+            case Constants.PROXY_I2P:
+            case Constants.PROXY_MANUAL:
+                return proxy;
+            default:
+                return Constants.NO_PROXY;
+        }
     }
 
     public int getUserAgentChoice() {
@@ -463,7 +473,7 @@ public class PreferenceManager {
      *
      * @param choice the proxy to use.
      */
-    public void setProxyChoice(int choice) {
+    public void setProxyChoice(@Constants.PROXY int choice) {
         putBoolean(Name.USE_PROXY, choice != Constants.NO_PROXY);
         putInt(Name.PROXY_CHOICE, choice);
     }

app/src/main/java/acr/browser/lightning/utils/ProxyUtils.java

@@ -114,14 +114,12 @@ public class ProxyUtils {
             case Constants.NO_PROXY:
                 // We shouldn't be here
                 return;
-
             case Constants.PROXY_ORBOT:
                 if (!OrbotHelper.isOrbotRunning(activity))
                     OrbotHelper.requestStartTor(activity);
                 host = "localhost";
                 port = 8118;
                 break;
-
             case Constants.PROXY_I2P:
                 mI2PProxyInitialized = true;
                 if (mI2PHelperBound && !mI2PHelper.isI2PAndroidRunning()) {
@@ -130,10 +128,14 @@ public class ProxyUtils {
                 host = "localhost";
                 port = 4444;
                 break;
-
             default:
                 host = mPreferences.getProxyHost();
                 port = mPreferences.getProxyPort();
+                break;
+            case Constants.PROXY_MANUAL:
+                host = mPreferences.getProxyHost();
+                port = mPreferences.getProxyPort();
+                break;
         }
 
         try {
@@ -191,6 +193,7 @@ public class ProxyUtils {
         }
     }
 
+    @Constants.PROXY
     public static int setProxyChoice(int choice, @NonNull Activity activity) {
         switch (choice) {
             case Constants.PROXY_ORBOT: