SettingsActivity with data sync option

2 files changed, 156 insertions, 1 deletions

diff --git a/app/src/main/java/org/rssin/android/SettingsActivity.java b/app/src/main/java/org/rssin/android/SettingsActivity.java
new file mode 100644
index 0000000..99ccdfa
--- /dev/null
+++ b/app/src/main/java/org/rssin/android/SettingsActivity.java
@@ -0,0 +1,153 @@
+package org.rssin.android;
+
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.content.res.Configuration;
+import android.media.Ringtone;
+import android.media.RingtoneManager;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Bundle;
+import android.preference.ListPreference;
+import android.preference.Preference;
+import android.preference.PreferenceActivity;
+import android.preference.PreferenceCategory;
+import android.preference.PreferenceFragment;
+import android.preference.PreferenceManager;
+import android.preference.RingtonePreference;
+import android.text.TextUtils;
+
+import org.rssin.rssin.R;
+
+import java.util.List;
+
+public class SettingsActivity extends PreferenceActivity {
+    /**
+     * Determines whether to always show the simplified settings UI, where
+     * settings are presented in a single list. When false, settings are shown
+     * as a master/detail two-pane view on tablets. When true, a single pane is
+     * shown on tablets.
+     *
+     * For now, this is true, so that we don't have to think about tablets.
+     */
+    private static final boolean ALWAYS_SIMPLE_PREFS = true;
+
+    @Override
+    protected void onPostCreate(Bundle savedInstanceState) {
+        super.onPostCreate(savedInstanceState);
+        setupSimplePreferencesScreen();
+    }
+
+    /**
+     * Shows the simplified settings UI if the device configuration if the
+     * device configuration dictates that a simplified, single-pane UI should be
+     * shown.
+     */
+    private void setupSimplePreferencesScreen() {
+        if (!isSimplePreferences(this)) {
+            return;
+        }
+
+        // Add 'general' preferences.
+        addPreferencesFromResource(R.xml.pref_main);
+
+        // Add 'data and sync' preferences, and a corresponding header.
+        PreferenceCategory fakeHeader = new PreferenceCategory(this);
+        fakeHeader.setTitle(R.string.pref_header_data_sync);
+        getPreferenceScreen().addPreference(fakeHeader);
+        addPreferencesFromResource(R.xml.pref_data_sync);
+
+        // Bind the summaries of EditText/List/Dialog/Ringtone preferences to
+        // their values. When their values change, their summaries are updated
+        // to reflect the new value, per the Android Design guidelines.
+        bindPreferenceSummaryToValue(findPreference("sync_frequency"));
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public boolean onIsMultiPane() {
+        return isXLargeTablet(this) && !isSimplePreferences(this);
+    }
+
+    /**
+     * Helper method to determine if the device has an extra-large screen. For
+     * example, 10" tablets are extra-large.
+     */
+    private static boolean isXLargeTablet(Context context) {
+        return (context.getResources().getConfiguration().screenLayout
+                & Configuration.SCREENLAYOUT_SIZE_MASK) >= Configuration.SCREENLAYOUT_SIZE_XLARGE;
+    }
+
+    /**
+     * Determines whether the simplified settings UI should be shown. This is
+     * true if this is forced via {@link #ALWAYS_SIMPLE_PREFS}, or the device
+     * doesn't have newer APIs like {@link PreferenceFragment}, or the device
+     * doesn't have an extra-large screen. In these cases, a single-pane
+     * "simplified" settings UI should be shown.
+     */
+    private static boolean isSimplePreferences(Context context) {
+        return ALWAYS_SIMPLE_PREFS
+                || Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB
+                || !isXLargeTablet(context);
+    }
+
+    /**
+     * A preference value change listener that updates the preference's summary
+     * to reflect its new value.
+     */
+    private static Preference.OnPreferenceChangeListener sBindPreferenceSummaryToValueListener = new Preference.OnPreferenceChangeListener() {
+        @Override
+        public boolean onPreferenceChange(Preference preference, Object value) {
+            String stringValue = value.toString();
+
+            if (preference instanceof ListPreference) {
+                ListPreference listPreference = (ListPreference) preference;
+                int index = listPreference.findIndexOfValue(stringValue);
+
+                preference.setSummary(index >= 0
+                            ? listPreference.getEntries()[index]
+                            : null);
+            } else {
+                preference.setSummary(stringValue);
+            }
+            return true;
+        }
+    };
+
+    /**
+     * Binds a preference's summary to its value. More specifically, when the
+     * preference's value is changed, its summary (line of text below the
+     * preference title) is updated to reflect the value. The summary is also
+     * immediately updated upon calling this method. The exact display format is
+     * dependent on the type of preference.
+     *
+     * @see #sBindPreferenceSummaryToValueListener
+     */
+    private static void bindPreferenceSummaryToValue(Preference preference) {
+        // Set the listener to watch for value changes.
+        preference.setOnPreferenceChangeListener(sBindPreferenceSummaryToValueListener);
+
+        // Trigger the listener immediately with the preference's
+        // current value.
+        sBindPreferenceSummaryToValueListener.onPreferenceChange(preference,
+                PreferenceManager
+                        .getDefaultSharedPreferences(preference.getContext())
+                        .getString(preference.getKey(), ""));
+    }
+
+    /**
+     * This fragment shows data and sync preferences only. It is used when the
+     * activity is showing a two-pane settings UI.
+     */
+    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
+    public static class DataSyncPreferenceFragment extends PreferenceFragment {
+        @Override
+        public void onCreate(Bundle savedInstanceState) {
+            super.onCreate(savedInstanceState);
+            addPreferencesFromResource(R.xml.pref_data_sync);
+            bindPreferenceSummaryToValue(findPreference("sync_frequency"));
+        }
+    }
+}
diff --git a/app/src/main/java/org/rssin/rssin/UnifiedInboxActivity.java b/app/src/main/java/org/rssin/android/UnifiedInboxActivity.java
index b1bf0dc..697a430 100644
--- a/app/src/main/java/org/rssin/rssin/UnifiedInboxActivity.java
+++ b/app/src/main/java/org/rssin/android/UnifiedInboxActivity.java
@@ -1,10 +1,12 @@
-package org.rssin.rssin;
+package org.rssin.android;
 
 import android.support.v7.app.ActionBarActivity;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
 
+import org.rssin.rssin.R;
+
 
 public class UnifiedInboxActivity extends ActionBarActivity {