Implement screen security, combine with password in app protection category

app/src/main/java/i2p/bote/android/BoteActivityBase.java

@@ -1,8 +1,12 @@
 package i2p.bote.android;
 
 import android.annotation.SuppressLint;
+import android.content.SharedPreferences;
+import android.os.Build;
 import android.os.Bundle;
+import android.preference.PreferenceManager;
 import android.support.v7.app.AppCompatActivity;
+import android.view.WindowManager;
 
 import i2p.bote.android.util.LocaleManager;
 
@@ -18,6 +22,14 @@ public class BoteActivityBase extends AppCompatActivity {
         // Initialize I2P settings
         InitActivities init = new InitActivities(this);
         init.initialize();
+
+        // Initialize screen security
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH &&
+                prefs.getBoolean("pref_screen_security", true))
+            getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
+        else
+            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_SECURE);
     }
 
     @Override

app/src/main/java/i2p/bote/android/config/AppProtectionPreferenceFragment.java

@@ -0,0 +1,41 @@
+package i2p.bote.android.config;
+
+import android.content.Intent;
+import android.os.Build;
+import android.os.Bundle;
+import android.preference.Preference;
+import android.support.v4.preference.PreferenceFragment;
+
+import i2p.bote.android.R;
+
+public class AppProtectionPreferenceFragment extends PreferenceFragment {
+    @Override
+    public void onCreate(Bundle paramBundle) {
+        super.onCreate(paramBundle);
+        addPreferencesFromResource(R.xml.settings_app_protection);
+        setupAppProtectionSettings();
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        //noinspection ConstantConditions
+        ((SettingsActivity) getActivity()).getSupportActionBar().setTitle(R.string.settings_label_app_protection);
+
+        // Screen security only works from API 14
+        Preference screenSecurityPreference = findPreference("pref_screen_security");
+        if (screenSecurityPreference != null &&
+                Build.VERSION.SDK_INT < Build.VERSION_CODES.ICE_CREAM_SANDWICH)
+            getPreferenceScreen().removePreference(screenSecurityPreference);
+    }
+
+    private void setupAppProtectionSettings() {
+        findPreference("pref_change_password").setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
+            @Override
+            public boolean onPreferenceClick(Preference preference) {
+                startActivity(new Intent(getActivity(), SetPasswordActivity.class));
+                return true;
+            }
+        });
+    }
+}

app/src/main/java/i2p/bote/android/config/SettingsActivity.java

@@ -20,9 +20,9 @@ public class SettingsActivity extends BoteActivityBase implements
         SharedPreferences.OnSharedPreferenceChangeListener {
     public static final String PREFERENCE_CATEGORY = "preference_category";
     public static final String PREFERENCE_CATEGORY_GENERAL = "preference_category_general";
-    public static final String PREFERENCE_CATEGORY_CHANGE_PASSWORD = "preference_category_change_password";
     public static final String PREFERENCE_CATEGORY_IDENTITIES = "preference_category_identities";
     public static final String PREFERENCE_CATEGORY_PRIVACY = "preference_category_privacy";
+    public static final String PREFERENCE_CATEGORY_APP_PROTECTION = "preference_category_app_protection";
     public static final String PREFERENCE_CATEGORY_APPEARANCE = "preference_category_appearance";
     public static final String PREFERENCE_CATEGORY_ADVANCED = "preference_category_advanced";
 
@@ -90,12 +90,12 @@ public class SettingsActivity extends BoteActivityBase implements
 
             findPreference(PREFERENCE_CATEGORY_GENERAL)
                     .setOnPreferenceClickListener(new CategoryClickListener(PREFERENCE_CATEGORY_GENERAL));
-            findPreference(PREFERENCE_CATEGORY_CHANGE_PASSWORD)
-                    .setOnPreferenceClickListener(new CategoryClickListener(PREFERENCE_CATEGORY_CHANGE_PASSWORD));
             findPreference(PREFERENCE_CATEGORY_IDENTITIES)
                     .setOnPreferenceClickListener(new CategoryClickListener(PREFERENCE_CATEGORY_IDENTITIES));
             findPreference(PREFERENCE_CATEGORY_PRIVACY)
                     .setOnPreferenceClickListener(new CategoryClickListener(PREFERENCE_CATEGORY_PRIVACY));
+            findPreference(PREFERENCE_CATEGORY_APP_PROTECTION)
+                    .setOnPreferenceClickListener(new CategoryClickListener(PREFERENCE_CATEGORY_APP_PROTECTION));
             findPreference(PREFERENCE_CATEGORY_APPEARANCE)
                     .setOnPreferenceClickListener(new CategoryClickListener(PREFERENCE_CATEGORY_APPEARANCE));
             findPreference(PREFERENCE_CATEGORY_ADVANCED)
@@ -119,11 +119,6 @@ public class SettingsActivity extends BoteActivityBase implements
             @Override
             public boolean onPreferenceClick(Preference preference) {
                 switch (category) {
-                    case PREFERENCE_CATEGORY_CHANGE_PASSWORD:
-                        Intent spi = new Intent(getActivity(), SetPasswordActivity.class);
-                        startActivity(spi);
-                        break;
-
                     case PREFERENCE_CATEGORY_IDENTITIES:
                         Intent ili = new Intent(getActivity(), IdentityListActivity.class);
                         startActivity(ili);
@@ -148,6 +143,8 @@ public class SettingsActivity extends BoteActivityBase implements
                 return new GeneralPreferenceFragment();
             case PREFERENCE_CATEGORY_PRIVACY:
                 return new PrivacyPreferenceFragment();
+            case PREFERENCE_CATEGORY_APP_PROTECTION:
+                return new AppProtectionPreferenceFragment();
             case PREFERENCE_CATEGORY_APPEARANCE:
                 return new AppearancePreferenceFragment();
             case PREFERENCE_CATEGORY_ADVANCED:

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

@@ -204,6 +204,9 @@
     <string name="pref_summ_minDelay">%s minutes</string>
     <string name="pref_title_maxDelay">Maximum delay per hop</string>
     <string name="pref_summ_maxDelay">%s minutes</string>
+    <string name="settings_label_app_protection">App protection</string>
+    <string name="screen_security">Screen security</string>
+    <string name="screen_security_summ">Block screenshots in the recents list and inside the app</string>
     <string name="settings_label_appearance">Appearance</string>
     <string name="settings_label_language">Language</string>
     <string name="settings_default">Default</string>

app/src/main/res/xml/settings.xml

@@ -3,15 +3,15 @@
     <Preference
         android:key="preference_category_general"
         android:title="@string/pref_title_general"/>
-    <Preference
-        android:key="preference_category_change_password"
-        android:title="@string/pref_title_change_password"/>
     <Preference
         android:key="preference_category_identities"
         android:title="@string/pref_title_identities"/>
     <Preference
         android:key="preference_category_privacy"
         android:title="@string/pref_title_privacy" />
+    <Preference
+        android:key="preference_category_app_protection"
+        android:title="@string/settings_label_app_protection"/>
     <Preference
         android:key="preference_category_appearance"
         android:title="@string/settings_label_appearance" />

app/src/main/res/xml/settings_app_protection.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <Preference
+        android:key="pref_change_password"
+        android:title="@string/pref_title_change_password"/>
+
+    <CheckBoxPreference
+        android:defaultValue="true"
+        android:key="pref_screen_security"
+        android:summary="@string/screen_security_summ"
+        android:title="@string/screen_security"/>
+
+</PreferenceScreen>