Multi-user support with 3 modes

Author: ChainsDD

res/values/arrays.xml

@@ -73,4 +73,16 @@
         <item>17</item>
         <item>80</item>
     </string-array>
+    
+    <string-array name="pref_user_mode_entries">
+        <item>Owner only</item>
+        <item>Owner controlled</item>
+        <item>User controlled</item>
+    </string-array>
+    <!-- Do not translate -->
+    <string-array name="pref_user_mode_values">
+        <item>owner_only</item>
+        <item>owner</item>
+        <item>user</item>
+    </string-array>
 </resources>

res/values/strings.xml

@@ -124,6 +124,7 @@
 
     <string name="pref_title">Preferences</string>
     <string name="pref_category_security">Security</string>
+    <string name="pref_user_mode_title">Multi-user mode</string>
     <string name="pref_pin_title">Use PIN</string>
     <string name="pref_change_pin_title">Change PIN</string>
     <string name="pref_timeout_title">Access timeout</string>

res/xml/preferences.xml

@@ -18,6 +18,12 @@
     <PreferenceCategory
         android:key="pref_category_security"
         android:title="@string/pref_category_security">
+        <ListPreference
+            android:defaultValue="owner_only"
+            android:key="pref_user_mode"
+            android:title="@string/pref_user_mode_title"
+            android:entries="@array/pref_user_mode_entries"
+            android:entryValues="@array/pref_user_mode_values" />
         <CheckBoxPreference
             android:key="pref_pin"
             android:title="@string/pref_pin_title"

res/xml/prefs_security.xml

@@ -16,6 +16,13 @@
 -->
 <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" >
 
+        <ListPreference
+            android:defaultValue="owner_only"
+            android:key="pref_user_mode"
+            android:title="@string/pref_user_mode_title"
+            android:entries="@array/pref_user_mode_entries"
+            android:entryValues="@array/pref_user_mode_values" />
+    
     <CheckBoxPreference
         android:defaultValue="false"
         android:key="pref_pin"

src/com/noshufou/android/su/preferences/Preferences.java

@@ -3,7 +3,8 @@
 
 public class Preferences {
 
-    public static final String PIN = "pref_pin";
+    public static final String USER_MODE = "pref_user_mode";
+	public static final String PIN = "pref_pin";
     public static final String CHANGE_PIN = "pref_change_pin";
     public static final String TIMEOUT = "pref_timeout";
     public static final String AUTOMATIC_ACTION = "pref_automatic_action";

src/com/noshufou/android/su/preferences/PreferencesActivity.java

@@ -23,15 +23,13 @@
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
-import android.net.Uri;
 import android.nfc.NfcAdapter;
 import android.os.AsyncTask;
 import android.os.Build;
 import android.os.Bundle;
 import android.preference.CheckBoxPreference;
 import android.preference.Preference;
 import android.preference.Preference.OnPreferenceChangeListener;
-import android.preference.PreferenceCategory;
 import android.preference.PreferenceScreen;
 import android.util.Log;
 import android.widget.Toast;
@@ -42,15 +40,12 @@
 import com.noshufou.android.su.PinActivity;
 import com.noshufou.android.su.R;
 import com.noshufou.android.su.TagWriterActivity;
-import com.noshufou.android.su.UpdaterActivity;
 import com.noshufou.android.su.provider.PermissionsProvider.Logs;
 import com.noshufou.android.su.service.ResultService;
 import com.noshufou.android.su.service.UpdaterService;
 import com.noshufou.android.su.util.BackupUtil;
 import com.noshufou.android.su.util.Util;
-import com.noshufou.android.su.util.Util.VersionInfo;
 import com.noshufou.android.su.widget.AncientNumberPickerDialog;
-import com.noshufou.android.su.widget.ChangeLog;
 
 public class PreferencesActivity extends SherlockPreferenceActivity
 implements OnSharedPreferenceChangeListener, OnPreferenceChangeListener {
@@ -71,6 +66,7 @@ public class PreferencesActivity extends SherlockPreferenceActivity
     private CheckBoxPreference mPin = null;
     private CheckBoxPreference mGhostMode = null;
     private Preference mSecretCode = null;
+    private Preference mUserMode = null;
 
     private Context mContext;
     private boolean mElite = false;
@@ -130,6 +126,11 @@ protected void onCreate(Bundle savedInstanceState) {
         }
 
         mClearLog = prefScreen.findPreference(Preferences.CLEAR_LOG);
+        mUserMode = findPreference(Preferences.USER_MODE); 
+        if (!Util.isUserOwner(this) && mUserMode != null) {
+        	mUserMode.setEnabled(false);
+        }
+
     }
 
     @Override
@@ -285,6 +286,8 @@ public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
                     .getString(Preferences.NOTIFICATION_TYPE, "toast").equals("toast"));
         } else if (key.equals(Preferences.AUTOMATIC_ACTION)) {
             Util.writeDefaultStoreFile(this);
+        } else if (key.equals(Preferences.USER_MODE)) {
+        	Util.writeOptionsFile(this);
         }
     }
 

src/com/noshufou/android/su/preferences/PreferencesFragment.java

@@ -37,6 +37,7 @@ public class PreferencesFragment extends PreferenceFragment
 
     private CheckBoxPreference mPin = null;
     private CheckBoxPreference mGhostMode = null;
+    private Preference mUserMode = null;
     private Preference mSecretCode = null;
     private PreferenceEnabler mEnabler = null;
 
@@ -110,6 +111,11 @@ public void onCreate(Bundle savedInstanceState) {
             mSecretCode.setSummary(getString(R.string.pref_secret_code_summary,
                     mPrefs.getString(Preferences.SECRET_CODE, "787378737")));
 //        mToastLocation = findPreference(Preferences.TOAST_LOCATION);
+        
+        mUserMode = findPreference(Preferences.USER_MODE); 
+        if (!Util.isUserOwner(getActivity()) && mUserMode != null) {
+        	mUserMode.setEnabled(false);
+        }
 
         updateTimeout(mPrefs.getInt(Preferences.TIMEOUT, 0));
         updateLogLimit(mPrefs.getInt(Preferences.LOG_ENTRY_LIMIT, 200));
@@ -247,6 +253,8 @@ public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, Strin
             setDepsNfc(sharedPreferences.getBoolean(Preferences.PIN, false));
         } else if (key.equals(Preferences.AUTOMATIC_ACTION)) {
             Util.writeDefaultStoreFile(getActivity());
+        } else if (key.equals(Preferences.USER_MODE)) {
+        	Util.writeOptionsFile(getActivity());
         }
     }
 

src/com/noshufou/android/su/service/ResultService.java

@@ -92,10 +92,6 @@ protected void onHandleIntent(Intent intent) {
                 appId = c.getLong(COLUMN_ID);
                 appNotify = c.getString(COLUMN_NOTIFICATIONS);
                 appLog = c.getString(COLUMN_LOGGING);
-                int dbAllow = c.getInt(COLUMN_ALLOW);
-                if (dbAllow != -1) {
-                    allow = dbAllow;
-                }
             }
             c.close();
 

src/com/noshufou/android/su/util/Util.java

@@ -901,4 +901,42 @@ public static boolean writeDefaultStoreFile(Context context) {
         }
         return true;
     }
+    
+    public static boolean writeOptionsFile(Context context) {
+        File storedDir = new File(context.getFilesDir().getAbsolutePath() + File.separator + "stored");
+        storedDir.mkdirs();
+        File optFile = new File(storedDir.getAbsolutePath() + File.separator + "options");
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        String ownerMode = prefs.getString(Preferences.USER_MODE, "owner_only");
+        try {
+            OutputStreamWriter out = new OutputStreamWriter(new FileOutputStream(optFile.getAbsolutePath()));
+            out.write(ownerMode);
+            out.write("\n");
+            out.flush();
+            out.close();
+        } catch (FileNotFoundException e) {
+            Log.w(TAG, "Options file not written", e);
+            return false;
+        } catch (IOException e) {
+            Log.w(TAG, "Options file not written", e);
+            return false;
+        }
+        return true;
+    }
+    
+    public static boolean isUserOwner(Context context) {
+        PackageManager pm = context.getPackageManager();
+        try {
+			ApplicationInfo ai = pm.getApplicationInfo(context.getPackageName(), 0);
+			if (ai.uid < 99999) {
+				return true;
+			} else {
+				return false;
+			}
+		} catch (NameNotFoundException e) {
+			Log.e(TAG, "Divided by zero...");
+			return false;
+		}
+    }
+    
 }