ABP/Android UI

src/org/adblockplus/android/SummarizedPreferences.java

+package org.adblockplus.android;
+
+import android.content.SharedPreferences;
+import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
+import android.preference.EditTextPreference;
+import android.preference.ListPreference;
+import android.preference.Preference;
+import android.preference.PreferenceActivity;
+import android.preference.PreferenceGroup;
+import android.preference.PreferenceScreen;
+
+/**
+ * PreferencesActivity which automatically sets preference summaries according
+ * to its current values.
+ */
+public class SummarizedPreferences extends PreferenceActivity implements OnSharedPreferenceChangeListener
+{
+  @Override
+  public void onResume()
+  {
+    super.onResume();
+    initSummaries(getPreferenceScreen());
+    getPreferenceScreen().getSharedPreferences().registerOnSharedPreferenceChangeListener(this);
+  }
+
+  @Override
+  public void onPause()
+  {
+    super.onPause();
+    getPreferenceScreen().getSharedPreferences().unregisterOnSharedPreferenceChangeListener(this);
+  }
+
+  @Override
+  public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key)
+  {
+    Preference pref = findPreference(key);
+    setPrefSummary(pref);
+  }
+
+  protected void setPrefSummary(Preference pref)
+  {
+    if (pref instanceof ListPreference)
+    {
+      CharSequence summary = ((ListPreference) pref).getEntry();
+      if (summary != null)
+      {
+        pref.setSummary(summary);
+      }
+    }
+    if (pref instanceof EditTextPreference)
+    {
+      CharSequence summary = ((EditTextPreference) pref).getText();
+      if (summary != null)
+      {
+        pref.setSummary(summary);
+      }
+    }
+  }
+
+  protected void initSummaries(PreferenceGroup preference)
+  {
+    for (int i = preference.getPreferenceCount() - 1; i >= 0; i--)
+    {
+      Preference pref = preference.getPreference(i);
+
+      if (pref instanceof PreferenceGroup || pref instanceof PreferenceScreen)
+      {
+        initSummaries((PreferenceGroup) pref);
+      }
+      else
+      {
+        setPrefSummary(pref);
+      }
+    }
+  }
+
+}