Add about section in settings (#99)

app/src/main/java/io/github/wulkanowy/data/db/dao/entities/Exam.java

@@ -165,9 +165,7 @@ public class Exam implements Serializable {
         myDao.update(this);
     }
 
-    /**
-     * called by internal mechanisms, do not call yourself.
-     */
+    /** called by internal mechanisms, do not call yourself. */
     @Generated(hash = 1730563422)
     public void __setDaoSession(DaoSession daoSession) {
         this.daoSession = daoSession;

app/src/main/java/io/github/wulkanowy/ui/main/settings/AboutScreen.java

@@ -0,0 +1,67 @@
+package io.github.wulkanowy.ui.main.settings;
+
+import android.content.Intent;
+import android.net.Uri;
+import android.os.Bundle;
+import android.support.v7.preference.Preference;
+import android.widget.Toast;
+
+import com.google.android.gms.oss.licenses.OssLicensesMenuActivity;
+
+import io.github.wulkanowy.BuildConfig;
+import io.github.wulkanowy.R;
+import io.github.wulkanowy.utils.AppConstant;
+
+public class AboutScreen extends SettingsFragment {
+
+    public static final String SHARED_KEY_ABOUT_VERSION = "about_version";
+
+    public static final String SHARED_KEY_ABOUT_LICENSES = "about_osl";
+
+    public static final String SHARED_KEY_ABOUT_REPO = "about_repo";
+
+    private Preference.OnPreferenceClickListener onProgrammerListener = new Preference.OnPreferenceClickListener() {
+        private int clicks = 0;
+
+        @Override
+        public boolean onPreferenceClick(Preference preference) {
+            Toast.makeText(getActivity(), getVersionToast(clicks++), Toast.LENGTH_SHORT).show();
+            return true;
+        }
+
+        private int getVersionToast(int click) {
+            if (0 == click) {
+                return R.string.about_programmer_step1;
+            }
+
+            if (1 == click) {
+                return R.string.about_programmer_step2;
+            }
+
+            if (9 > click) {
+                return R.string.about_programmer_step3;
+            }
+
+            return R.string.about_programmer;
+        }
+    };
+
+    public AboutScreen() {
+        // silence is golden
+    }
+
+    @Override
+    public void onCreate(final Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        findPreference(SHARED_KEY_ABOUT_VERSION).setSummary(BuildConfig.VERSION_NAME);
+        findPreference(SHARED_KEY_ABOUT_VERSION).setOnPreferenceClickListener(onProgrammerListener);
+        findPreference(SHARED_KEY_ABOUT_REPO).setIntent(new Intent(Intent.ACTION_VIEW, Uri.parse(AppConstant.REPO_URL)));
+        findPreference(SHARED_KEY_ABOUT_LICENSES).setIntent(new Intent(getActivity(), OssLicensesMenuActivity.class)
+                .putExtra("title", getString(R.string.pref_about_osl)));
+    }
+
+    @Override
+    public void onCreatePreferences(Bundle bundle, String rootKey) {
+        setPreferencesFromResource(R.xml.preferences, rootKey);
+    }
+}

app/src/main/java/io/github/wulkanowy/ui/main/settings/SettingsFragment.java

@@ -2,13 +2,17 @@ package io.github.wulkanowy.ui.main.settings;
 
 import android.content.SharedPreferences;
 import android.os.Bundle;
+import android.support.v4.app.Fragment;
+import android.support.v4.app.FragmentTransaction;
 import android.support.v7.preference.PreferenceFragmentCompat;
+import android.support.v7.preference.PreferenceScreen;
 
 import io.github.wulkanowy.R;
 import io.github.wulkanowy.services.jobs.SyncJob;
 
 public class SettingsFragment extends PreferenceFragmentCompat
-        implements SharedPreferences.OnSharedPreferenceChangeListener {
+        implements SharedPreferences.OnSharedPreferenceChangeListener,
+        PreferenceFragmentCompat.OnPreferenceStartScreenCallback{
 
     public static final String SHARED_KEY_START_TAB = "startup_tab";
 
@@ -29,6 +33,31 @@ public class SettingsFragment extends PreferenceFragmentCompat
         addPreferencesFromResource(R.xml.preferences);
     }
 
+    @Override
+    public void onCreate(final Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+    }
+
+    @Override
+    public Fragment getCallbackFragment() {
+        return this;
+    }
+
+    @Override
+    public boolean onPreferenceStartScreen(PreferenceFragmentCompat preferenceFragmentCompat,
+                                           PreferenceScreen preferenceScreen) {
+        FragmentTransaction ft = getActivity().getSupportFragmentManager().beginTransaction();
+        AboutScreen fragment = new AboutScreen();
+        Bundle args = new Bundle();
+        args.putString(PreferenceFragmentCompat.ARG_PREFERENCE_ROOT, preferenceScreen.getKey());
+        fragment.setArguments(args);
+        ft.add(R.id.main_activity_container, fragment, preferenceScreen.getKey());
+        ft.addToBackStack(preferenceScreen.getKey());
+        ft.commit();
+
+        return true;
+    }
+
     @Override
     public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
         if (key.equals(SHARED_KEY_SERVICES_ENABLE) || key.equals(SHARED_KEY_SERVICES_INTERVAL)

app/src/main/java/io/github/wulkanowy/utils/AppConstant.java

@@ -19,6 +19,8 @@ public final class AppConstant {
 
     public static final String DATE_PATTERN = "yyyy-MM-dd";
 
+    public static final String REPO_URL = "https://github.com/wulkanowy/wulkanowy";
+
     private AppConstant() {
         throw new IllegalStateException("Utility class");
     }