org.holoeverywhere.preference.PreferenceFragment Maven / Gradle / Ivy
package org.holoeverywhere.preference;
import org.holoeverywhere.LayoutInflater;
import org.holoeverywhere.R;
import org.holoeverywhere.app.Fragment;
import org.holoeverywhere.widget.ListView;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnKeyListener;
import android.view.ViewGroup;
public abstract class PreferenceFragment extends Fragment implements
PreferenceManager.OnPreferenceTreeClickListener {
public interface OnPreferenceStartFragmentCallback {
boolean onPreferenceStartFragment(PreferenceFragment caller,
Preference pref);
}
private static final int FIRST_REQUEST_CODE = 100;
private static final int MSG_BIND_PREFERENCES = 1;
private static final String PREFERENCES_TAG = "android:preferences";
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MSG_BIND_PREFERENCES:
bindPreferences();
break;
}
}
};
private boolean mHavePrefs, mInitDone;
private ListView mList;
private OnKeyListener mListOnKeyListener = new OnKeyListener() {
@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
Object selectedItem = mList.getSelectedItem();
if (selectedItem instanceof Preference) {
View selectedView = mList.getSelectedView();
return ((Preference) selectedItem).onKey(selectedView, keyCode,
event);
}
return false;
}
};
private PreferenceManager mPreferenceManager;
final private Runnable mRequestFocus = new Runnable() {
@Override
public void run() {
mList.focusableViewAvailable(mList);
}
};
public void addPreferencesFromIntent(Intent intent) {
requirePreferenceManager();
setPreferenceScreen(mPreferenceManager.inflateFromIntent(intent,
getPreferenceScreen()));
}
public void addPreferencesFromResource(int preferencesResId) {
requirePreferenceManager();
setPreferenceScreen(mPreferenceManager.inflateFromResource(
getActivity(), preferencesResId, getPreferenceScreen()));
}
private void bindPreferences() {
final PreferenceScreen preferenceScreen = getPreferenceScreen();
if (preferenceScreen != null) {
preferenceScreen.bind(getListView());
}
}
private void ensureList() {
if (mList != null) {
return;
}
View root = getView();
if (root == null) {
throw new IllegalStateException("Content view not yet created");
}
View rawListView = root.findViewById(android.R.id.list);
if (!(rawListView instanceof ListView)) {
throw new RuntimeException(
"Content has view with id attribute 'android.R.id.list' "
+ "that is not a ListView class");
}
mList = (ListView) rawListView;
if (mList == null) {
throw new RuntimeException(
"Your content must have a ListView whose id attribute is "
+ "'android.R.id.list'");
}
mList.setOnKeyListener(mListOnKeyListener);
mHandler.post(mRequestFocus);
}
public Preference findPreference(CharSequence key) {
if (mPreferenceManager == null) {
return null;
}
return mPreferenceManager.findPreference(key);
}
public Preference findPreference(int id) {
if (mPreferenceManager == null) {
return null;
}
return mPreferenceManager.findPreference(id);
}
public ListView getListView() {
ensureList();
return mList;
}
public PreferenceManager getPreferenceManager() {
return mPreferenceManager;
}
public PreferenceScreen getPreferenceScreen() {
return mPreferenceManager.getPreferenceScreen();
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
if (mHavePrefs) {
bindPreferences();
}
mInitDone = true;
if (savedInstanceState != null) {
Bundle container = savedInstanceState
.getBundle(PreferenceFragment.PREFERENCES_TAG);
if (container != null) {
final PreferenceScreen preferenceScreen = getPreferenceScreen();
if (preferenceScreen != null) {
preferenceScreen.restoreHierarchyState(container);
}
}
}
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
mPreferenceManager
.dispatchActivityResult(requestCode, resultCode, data);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mPreferenceManager = new PreferenceManager(getActivity(),
PreferenceFragment.FIRST_REQUEST_CODE);
mPreferenceManager.setFragment(this);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.preference_list_fragment, container,
false);
}
@Override
public void onDestroy() {
super.onDestroy();
mPreferenceManager.dispatchActivityDestroy();
}
@Override
public void onDestroyView() {
mList = null;
mHandler.removeCallbacks(mRequestFocus);
mHandler.removeMessages(PreferenceFragment.MSG_BIND_PREFERENCES);
super.onDestroyView();
}
@Override
public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen,
Preference preference) {
if (preference.getFragment() != null
&& getActivity() instanceof OnPreferenceStartFragmentCallback) {
return ((OnPreferenceStartFragmentCallback) getActivity())
.onPreferenceStartFragment(this, preference);
}
return false;
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
final PreferenceScreen preferenceScreen = getPreferenceScreen();
if (preferenceScreen != null) {
Bundle container = new Bundle();
preferenceScreen.saveHierarchyState(container);
outState.putBundle(PreferenceFragment.PREFERENCES_TAG, container);
}
}
@Override
public void onStart() {
super.onStart();
mPreferenceManager.setOnPreferenceTreeClickListener(this);
}
@Override
public void onStop() {
super.onStop();
mPreferenceManager.dispatchActivityStop();
mPreferenceManager.setOnPreferenceTreeClickListener(null);
}
private void postBindPreferences() {
if (mHandler.hasMessages(PreferenceFragment.MSG_BIND_PREFERENCES)) {
return;
}
mHandler.obtainMessage(PreferenceFragment.MSG_BIND_PREFERENCES)
.sendToTarget();
}
private void requirePreferenceManager() {
if (mPreferenceManager == null) {
throw new RuntimeException(
"This should be called after super.onCreate.");
}
}
public void setPreferenceScreen(PreferenceScreen preferenceScreen) {
if (mPreferenceManager.setPreferences(preferenceScreen)
&& preferenceScreen != null) {
mHavePrefs = true;
if (mInitDone) {
postBindPreferences();
}
}
}
}