Database Users

[source code] Viewpager containing preferencescreens

Hi,
since the compability package does not ship PreferenceListFragment, I built my own one, which I am using in my gtalk widget app.
I was asked for the source, so here it is. It's quite a hacky workaround..
Edit: Someone asked about the license: Use it however you like
Code:
public class PreferenceListFragment extends ListFragment{
private PreferenceManager mPreferenceManager;
/**
* The starting request code given out to preference framework.
*/
private static final int FIRST_REQUEST_CODE = 100;
private static final int MSG_BIND_PREFERENCES = 0;
private Handler mHandler = new Handler() {
[user=439709]@override[/user]
public void handleMessage(Message msg) {
switch (msg.what) {
case MSG_BIND_PREFERENCES:
bindPreferences();
break;
}
}
};
private ListView lv;
private int xmlId;
public PreferenceListFragment(int xmlId){
this.xmlId = xmlId;
}
//must be provided
public PreferenceListFragment(){
}
[user=439709]@override[/user]
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle b){
postBindPreferences();
return lv;
}
[user=439709]@override[/user]
public void onDestroyView(){
super.onDestroyView();
ViewParent p = lv.getParent();
if(p != null)
((ViewGroup)p).removeView(lv);
}
[user=439709]@override[/user]
public void onCreate(Bundle b) {
super.onCreate(b);
if(b != null)
xmlId = b.getInt("xml");
mPreferenceManager = onCreatePreferenceManager();
lv = (ListView) LayoutInflater.from(getActivity()).inflate(R.layout.preference_list_content, null);
lv.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
addPreferencesFromResource(xmlId);
postBindPreferences();
((OnPreferenceAttachedListener)getActivity()).onPreferenceAttached(getPreferenceScreen(), xmlId);
}
[user=439709]@override[/user]
public void onStop(){
super.onStop();
try{
Method m = PreferenceManager.class.getDeclaredMethod("dispatchActivityStop");
m.setAccessible(true);
m.invoke(mPreferenceManager);
}catch(Exception e){
e.printStackTrace();
}
}
[user=439709]@override[/user]
public void onDestroy() {
super.onDestroy();
lv = null;
try{
Method m = PreferenceManager.class.getDeclaredMethod("dispatchActivityDestroy");
m.setAccessible(true);
m.invoke(mPreferenceManager);
}catch(Exception e){
e.printStackTrace();
}
}
[user=439709]@override[/user]
public void onSaveInstanceState(Bundle outState) {
outState.putInt("xml", xmlId);
super.onSaveInstanceState(outState);
}
[user=439709]@override[/user]
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
try{
Method m = PreferenceManager.class.getDeclaredMethod("dispatchActivityResult", int.class, int.class, Intent.class);
m.setAccessible(true);
m.invoke(mPreferenceManager, requestCode, resultCode, data);
}catch(Exception e){
e.printStackTrace();
}
}
/**
* Posts a message to bind the preferences to the list view.
* <p>
* Binding late is preferred as any custom preference types created in
* {@link #onCreate(Bundle)} are able to have their views recycled.
*/
private void postBindPreferences() {
if (mHandler.hasMessages(MSG_BIND_PREFERENCES)) return;
mHandler.obtainMessage(MSG_BIND_PREFERENCES).sendToTarget();
}
private void bindPreferences() {
final PreferenceScreen preferenceScreen = getPreferenceScreen();
if (preferenceScreen != null) {
preferenceScreen.bind(lv);
}
}
/**
* Creates the {@link PreferenceManager}.
*
* [user=2056652]@return[/user] The {@link PreferenceManager} used by this activity.
*/
private PreferenceManager onCreatePreferenceManager() {
try{
Constructor<PreferenceManager> c = PreferenceManager.class.getDeclaredConstructor(Activity.class, int.class);
c.setAccessible(true);
PreferenceManager preferenceManager = c.newInstance(this.getActivity(), FIRST_REQUEST_CODE);
return preferenceManager;
}catch(Exception e){
e.printStackTrace();
return null;
}
}
/**
* Returns the {@link PreferenceManager} used by this activity.
* [user=2056652]@return[/user] The {@link PreferenceManager}.
*/
public PreferenceManager getPreferenceManager() {
return mPreferenceManager;
}
/**
* Sets the root of the preference hierarchy that this activity is showing.
*
* [user=955119]@param[/user] preferenceScreen The root {@link PreferenceScreen} of the preference hierarchy.
*/
public void setPreferenceScreen(PreferenceScreen preferenceScreen){
try{
Method m = PreferenceManager.class.getDeclaredMethod("setPreferences", PreferenceScreen.class);
m.setAccessible(true);
boolean result = (Boolean) m.invoke(mPreferenceManager, preferenceScreen);
if (result && preferenceScreen != null) {
postBindPreferences();
}
}catch(Exception e){
e.printStackTrace();
}
}
/**
* Gets the root of the preference hierarchy that this activity is showing.
*
* [user=2056652]@return[/user] The {@link PreferenceScreen} that is the root of the preference
* hierarchy.
*/
public PreferenceScreen getPreferenceScreen(){
try{
Method m = PreferenceManager.class.getDeclaredMethod("getPreferenceScreen");
m.setAccessible(true);
return (PreferenceScreen) m.invoke(mPreferenceManager);
}catch(Exception e){
e.printStackTrace();
return null;
}
}
/**
* Adds preferences from activities that match the given {@link Intent}.
*
* [user=955119]@param[/user] intent The {@link Intent} to query activities.
*/
public void addPreferencesFromIntent(Intent intent) {
throw new RuntimeException("too lazy to include this bs");
}
/**
* Inflates the given XML resource and adds the preference hierarchy to the current
* preference hierarchy.
*
* [user=955119]@param[/user] preferencesResId The XML resource ID to inflate.
*/
public void addPreferencesFromResource(int preferencesResId) {
try{
Method m = PreferenceManager.class.getDeclaredMethod("inflateFromResource", Context.class, int.class, PreferenceScreen.class);
m.setAccessible(true);
PreferenceScreen prefScreen = (PreferenceScreen) m.invoke(mPreferenceManager, getActivity(), preferencesResId, getPreferenceScreen());
setPreferenceScreen(prefScreen);
}catch(Exception e){
e.printStackTrace();
}
}
/**
* Finds a {@link Preference} based on its key.
*
* [user=955119]@param[/user] key The key of the preference to retrieve.
* [user=2056652]@return[/user] The {@link Preference} with the key, or null.
* [user=690402]@see[/user] PreferenceGroup#findPreference(CharSequence)
*/
public Preference findPreference(CharSequence key) {
if (mPreferenceManager == null) {
return null;
}
return mPreferenceManager.findPreference(key);
}
public interface OnPreferenceAttachedListener{
public void onPreferenceAttached(PreferenceScreen root, int xmlId);
}
}
How to use:
Code:
public class Settings extends FragmentActivity implements OnPreferenceAttachedListener, OnPreferenceChangeListener, OnPreferenceClickListener{
private Preference filterPref;
private ViewPager viewPager;
public void onCreate(Bundle b){
super.onCreate(b);
setContentView(R.layout.settings);
viewPager = (ViewPager) findViewById(R.id.pager);
PagerAdapter adapter = new PagerAdapter(getSupportFragmentManager(), this);
viewPager.setAdapter(adapter);
TitlePageIndicator titleIndicator = (TitlePageIndicator) findViewById(R.id.titles);
titleIndicator.setViewPager(viewPager);
titleIndicator.setFooterIndicatorStyle(IndicatorStyle.Underline);
viewPager.setCurrentItem(1);
}
//setup your onPreferenceClickListener/onPreferenceChangeListener here
[user=439709]@override[/user]
public void onPreferenceAttached(PreferenceScreen root, int xmlId){
if(root == null)
return; //for whatever reason in very rare cases this is null
if(xmlId == R.xml.widget_settings){ //example id
root.findPreference("somePreference").setOnPreferenceClickListener(this);
}
}
//handle your preferenceChanged events here (if needed)
[user=439709]@override[/user]
public boolean onPreferenceChange(Preference preference, Object newValue) {
return true;
}
//handle your preferenceClick events here (if needed)
[user=439709]@override[/user]
public boolean onPreferenceClick(Preference pref){
return true;
}
}
and the adapter I am using:
Code:
public class PagerAdapter extends FragmentPagerAdapter implements TitleProvider{
PreferenceListFragment[] fragments;
String[] titles;
public PagerAdapter(FragmentManager fm, Context context) {
super(fm);
fragments = new PreferenceListFragment[4];
fragments[0] = new PreferenceListFragment(R.xml.settings);
fragments[1] = new PreferenceListFragment(R.xml.widget_settings);
fragments[2] = new PreferenceListFragment(R.xml.s_widget_settings);
fragments[3] = new PreferenceListFragment(R.xml.color_settings);
titles = new String[4];
titles[0] = context.getString(R.string.main_settings);
titles[1] = context.getString(R.string.widget_settings);
titles[2] = context.getString(R.string.s_widget_settings);
titles[3] = context.getString(R.string.color_settings_main);
}
[user=439709]@override[/user]
public Fragment getItem(int position){
return fragments[position];
}
[user=439709]@override[/user]
public int getCount() {
return fragments.length;
}
[user=439709]@override[/user]
public String getTitle(int position) {
return titles[position];
}
}
Lastly you will need this xml file: preference_list_content.xml (belongs into /res/layout/) (pulled from aosp)
Code:
<?xml version="1.0" encoding="utf-8"?>
<!--
/* //device/apps/common/assets/res/layout/list_content.xml
**
** Copyright 2006, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
-->
<ListView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@android:id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:drawSelectorOnTop="false"
android:scrollbarAlwaysDrawVerticalTrack="true"
/>

Thanks for sharing.
=]

Thank you for sharing!

THANK YOU, much appropriated

Working fine on my devices (Nexus S and GNex), but received logs with crashes here:
Code:
((OnPreferenceAttachedListener)getActivity()).onPreferenceAttached(getPreferenceScreen(), xmlId);
NullPointerException here:
Code:
@Override
public void onPreferenceAttached(PreferenceScreen root, int xmlId) {
List<PreferenceScreen> rootPref=new ArrayList<PreferenceScreen>() ;
rootPref.add(root);
root.getSharedPreferences().registerOnSharedPreferenceChangeListener(
this);

hm, I received logs, that the listview is null when bindPreferences() is called. =/

thank you, i will use this on my application NSTools

Hello, i ma new at this and i am trying to understand the code, what exactly are "R.array.display_filter_array" and "R.layout.preference_list_content", these are the only things i have left to try this code, hope you can help me
Thank you

I added the missing layout file in the first post.
I also added a check for nullpointer in onPreferenceAttached().
R.array.display_filter_array correspondends to a string array I defined.
getResources().getStringArray(int stringId) will return an array of localized strings defined in res/values/strings.xml.

Thank you so much for this! I've been wracking my brain for a long time to come up with a way to use a PreferenceFragment on pre-Honeycomb devices, and this fits my needs exactly. So much love.
I'll let you know if I run across any issues.

Hi.
First I'd like to thank you for sharing this.
I have an issue with this : each preference row is only taking the width it's really nead, instead of using all width available like any Preference view. The result is kinda ugly (widgets of preferences not aligned in the right and click area way too little).
But if I start a new Activity and come back, they are well displayed. The only difference between the code I use and yours is I don't use a ViewPage, I directly use the ListFragment as Fragment.
Can someone help me please ?
Thanks in advance.

Hey guys, I just wanted to share a different initialization scheme. I couldn't get the activity to survive orientation change without fc. So i came up with this...
Extended PreferenceFragment
Code:
package org.teameos.settings.device;
import android.os.Bundle;
public class DiagPreferences extends PreferenceListFragment {
public static DiagPreferences newInstance(int xml) {
DiagPreferences f = new DiagPreferences(xml);
Bundle b = new Bundle();
b.putInt("xml", xml);
f.setArguments(b);
return f;
}
public DiagPreferences(int xmlId) {
// TODO Auto-generated constructor stub
super(xmlId);
}
public DiagPreferences() {
super();
}
The adapter
Code:
public ViewPagerAdapter(Context context, FragmentManager fm) {
super(fm);
mContext = context;
mFragments = new ArrayList<Pair<Fragment, String>>();
mFragments.add(Pair.create(
(Fragment) UpdatesPreferences.newInstance(R.xml.updates_and_menus),
mContext.getString(R.string.eos_ota_menus)));
mFragments.add(Pair.create((Fragment) DiagPreferences.newInstance(R.xml.diagnostics),
mContext.getString(R.string.eos_diag)));
mFragments.add(Pair.create((Fragment) PrlPreferences.newInstance(R.xml.prl_management),
mContext.getString(R.string.prl_management)));
}

using the above code (you cant use constructors) and using newInstance its not working
you need modify this in Oncreate
Code:
super.onCreate(b);
if(b != null){
xmlId = b.getInt("xml");
}else
{
xmlId = getArguments().getInt("xml");
}
This code gave me a warning about memory leak we shouls use WeakReference or use as static
Code:
private Handler mHandler = new Handler() {
[user=439709]@override[/user]
public void handleMessage(Message msg) {
switch (msg.what) {
case MSG_BIND_PREFERENCES:
bindPreferences();
break;
}
}
};
like this:
Code:
private [B][COLOR="Red"]static[/COLOR] [/B]Handler mHandler = new Handler() {
[user=439709]@override[/user]
public void handleMessage(Message msg) {
switch (msg.what) {
case MSG_BIND_PREFERENCES:
bindPreferences();
break;
}
}
};
and in all "dependencies" of that function like bindPreferences and so on.
Ps AMAZING Work BTW thanks a lot

Great code, but I can't find TitleProvider anywhere... I believe it used to be part of PagerViewer? How to remove this?

hosting widget in my app

I already have a working code that shows up a selected widget in my app, but the thing is how would I use the selected widget to show up in other activities in my app??? please if any1 know share the knowledge. thanks in advance.
this is the 100% working code:
Code:
static final String TAG = "WidgetHostExampleActivity";
AppWidgetManager mAppWidgetManager;
AppWidgetHost mAppWidgetHost;
RelativeLayout mainlayout;
/**
* Called on the creation of the activity.
*/
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mainlayout = (RelativeLayout) findViewById(R.id.main_layout);
mAppWidgetManager = AppWidgetManager.getInstance(this);
mAppWidgetHost = new AppWidgetHost(this, R.id.APPWIDGET_HOST_ID);
}
/**
* Launches the menu to select the widget. The selected widget will be on
* the result of the activity.
*/
void selectWidget() {
int appWidgetId = this.mAppWidgetHost.allocateAppWidgetId();
Intent pickIntent = new Intent(AppWidgetManager.ACTION_APPWIDGET_PICK);
pickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
addEmptyData(pickIntent);
startActivityForResult(pickIntent, R.id.REQUEST_PICK_APPWIDGET);
}
/**
* This avoids a bug in the com.android.settings.AppWidgetPickActivity,
* which is used to select widgets. This just adds empty extras to the
* intent, avoiding the bug.
*
* See more: [url]http://code.google.com/p/android/issues/detail?id=4272[/url]
*/
void addEmptyData(Intent pickIntent) {
ArrayList<AppWidgetProviderInfo> customInfo = new ArrayList<AppWidgetProviderInfo>();
pickIntent.putParcelableArrayListExtra(AppWidgetManager.EXTRA_CUSTOM_INFO, customInfo);
ArrayList<Bundle> customExtras = new ArrayList<Bundle>();
pickIntent.putParcelableArrayListExtra(AppWidgetManager.EXTRA_CUSTOM_EXTRAS, customExtras);
}
/**
* If the user has selected an widget, the result will be in the 'data' when
* this function is called.
*/
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if (requestCode == R.id.REQUEST_PICK_APPWIDGET) {
configureWidget(data);
} else if (requestCode == R.id.REQUEST_CREATE_APPWIDGET) {
createWidget(data);
}
} else if (resultCode == RESULT_CANCELED && data != null) {
int appWidgetId = data.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, -1);
if (appWidgetId != -1) {
mAppWidgetHost.deleteAppWidgetId(appWidgetId);
}
}
}
/**
* Checks if the widget needs any configuration. If it needs, launches the
* configuration activity.
*/
private void configureWidget(Intent data) {
Bundle extras = data.getExtras();
int appWidgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, -1);
AppWidgetProviderInfo appWidgetInfo = mAppWidgetManager.getAppWidgetInfo(appWidgetId);
if (appWidgetInfo.configure != null) {
Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_CONFIGURE);
intent.setComponent(appWidgetInfo.configure);
intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
startActivityForResult(intent, R.id.REQUEST_CREATE_APPWIDGET);
} else {
createWidget(data);
}
}
/**
* Creates the widget and adds to our view layout.
*/
public void createWidget(Intent data) {
Bundle extras = data.getExtras();
int appWidgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, -1);
AppWidgetProviderInfo appWidgetInfo = mAppWidgetManager.getAppWidgetInfo(appWidgetId);
AppWidgetHostView hostView = mAppWidgetHost.createView(this, appWidgetId, appWidgetInfo);
hostView.setAppWidget(appWidgetId, appWidgetInfo);
mainlayout.addView(hostView);
Log.i(TAG, "The widget size is: " + appWidgetInfo.minWidth + "*" + appWidgetInfo.minHeight);
}
/**
* Registers the AppWidgetHost to listen for updates to any widgets this app
* has.
*/
@Override
protected void onStart() {
super.onStart();
mAppWidgetHost.startListening();
}
/**
* Stop listen for updates for our widgets (saving battery).
*/
@Override
protected void onStop() {
super.onStop();
mAppWidgetHost.stopListening();
}
/**
* Removes the widget displayed by this AppWidgetHostView.
*/
public void removeWidget(AppWidgetHostView hostView) {
mAppWidgetHost.deleteAppWidgetId(hostView.getAppWidgetId());
mainlayout.removeView(hostView);
}
/**
* Handles the menu.
*/
@Override
public boolean onOptionsItemSelected(MenuItem item) {
Log.i(TAG, "Menu selected: " + item.getTitle() + " / " + item.getItemId() + " / " + R.id.addWidget);
switch (item.getItemId()) {
case R.id.addWidget:
selectWidget();
return true;
case R.id.removeWidget:
removeWidgetMenuSelected();
return false;
}
return super.onOptionsItemSelected(item);
}
/**
* Handle the 'Remove Widget' menu.
*/
public void removeWidgetMenuSelected() {
int childCount = mainlayout.getChildCount();
if (childCount > 1) {
View view = mainlayout.getChildAt(childCount - 1);
if (view instanceof AppWidgetHostView) {
removeWidget((AppWidgetHostView) view);
Toast.makeText(this, R.string.widget_removed_popup, Toast.LENGTH_SHORT).show();
return;
}
}
Toast.makeText(this, R.string.no_widgets_popup, Toast.LENGTH_SHORT).show();
}
/**
* Creates the menu with options to add and remove widgets.
*/
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return true;
}

[Q] Playing audio from MediaStore using separate activities

Right basically after 3 or 4 days of trying, I finally managed to list all the audio files but now i have a new problem and thats trying to play a music file from a separate activity..
Here's what I have so far
My PlayList Activity:
Code:
public class PlayListActivity extends ListActivity {
// Songs list
public ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.playlist);
ArrayList<HashMap<String, String>> songsListData = new ArrayList<HashMap<String, String>>();
SongsManager plm = new SongsManager();
// get all songs from sdcard
this.songsList = plm.getPlayList(this);
// looping through playlist
for (int i = 0; i < songsList.size(); i++) {
// creating new HashMap
HashMap<String, String> song = songsList.get(i);
// adding HashList to ArrayList
songsListData.add(song);
}
// Adding menuItems to ListView
ListAdapter adapter = new SimpleAdapter(this, songsListData,
R.layout.playlist_item, new String[] { "songTitle" }, new int[] {
R.id.songTitle });
setListAdapter(adapter);
// selecting single ListView item
ListView lv = getListView();
// listening to single listitem click
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting listitem index
int songIndex = position;
// Starting new intent
Intent in = new Intent(getApplicationContext(),
MainActivity.class);
// Sending songIndex to PlayerActivity
in.putExtra("songIndex", songIndex);
setResult(100, in);
// Closing PlayListView
finish();
}
});
}
}
And my Main Activity:
Code:
private ImageButton btnPlay;
private ImageButton btnForward;
private ImageButton btnBackward;
private ImageButton btnNext;
private ImageButton btnPrevious;
private ImageButton btnPlaylist;
private ImageButton btnRepeat;
private ImageButton btnShuffle;
private SeekBar songProgressBar;
private TextView songTitleLabel;
private TextView songCurrentDurationLabel;
private TextView songTotalDurationLabel;
private ImageButton eq;
// Media Player
private MediaPlayer mp;
// Handler to update UI timer, progress bar etc,.
private Handler mHandler = new Handler();;
private SongsManager songManager;
private Utilities utils;
private int seekForwardTime = 5000; // 5000 milliseconds
private int seekBackwardTime = 5000; // 5000 milliseconds
private int currentSongIndex = 0;
private boolean isShuffle = false;
private boolean isRepeat = false;
private ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.player);
// All player buttons
btnPlay = (ImageButton) findViewById(R.id.btnPlay);
btnForward = (ImageButton) findViewById(R.id.btnForward);
btnBackward = (ImageButton) findViewById(R.id.btnBackward);
btnNext = (ImageButton) findViewById(R.id.btnNext);
btnPrevious = (ImageButton) findViewById(R.id.btnPrevious);
btnPlaylist = (ImageButton) findViewById(R.id.btnPlaylist);
btnRepeat = (ImageButton) findViewById(R.id.btnRepeat);
btnShuffle = (ImageButton) findViewById(R.id.btnShuffle);
songProgressBar = (SeekBar) findViewById(R.id.songProgressBar);
songTitleLabel = (TextView) findViewById(R.id.songTitle);
songCurrentDurationLabel = (TextView) findViewById(R.id.songCurrentDurationLabel);
songTotalDurationLabel = (TextView) findViewById(R.id.songTotalDurationLabel);
eq = (ImageButton) findViewById(R.id.eq);
// Mediaplayer
mp = new MediaPlayer();
songManager = new SongsManager();
utils = new Utilities();
// Listeners
songProgressBar.setOnSeekBarChangeListener(this); // Important
mp.setOnCompletionListener(this); // Important
// Getting all songs list
songsList = songManager.getPlayList();
/**
* Play button click event
* plays a song and changes button to pause image
* pauses a song and changes button to play image
* */
btnPlay.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// check for already playing
if(mp.isPlaying()){
if(mp!=null){
mp.pause();
// Changing button image to play button
btnPlay.setImageResource(R.drawable.btn_play);
}
}else{
// Resume song
if(mp!=null){
mp.start();
// Changing button image to pause button
btnPlay.setImageResource(R.drawable.btn_pause);
}
}
}
});
/**
* Forward button click event
* Forwards song specified seconds
* */
btnForward.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// get current song position
int currentPosition = mp.getCurrentPosition();
// check if seekForward time is lesser than song duration
if(currentPosition + seekForwardTime <= mp.getDuration()){
// forward song
mp.seekTo(currentPosition + seekForwardTime);
}else{
// forward to end position
mp.seekTo(mp.getDuration());
}
}
});
/**
* Backward button click event
* Backward song to specified seconds
* */
btnBackward.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// get current song position
int currentPosition = mp.getCurrentPosition();
// check if seekBackward time is greater than 0 sec
if(currentPosition - seekBackwardTime >= 0){
// forward song
mp.seekTo(currentPosition - seekBackwardTime);
}else{
// backward to starting position
mp.seekTo(0);
}
}
});
/**
* Next button click event
* Plays next song by taking currentSongIndex + 1
* */
btnNext.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// check if next song is there or not
if(currentSongIndex < (songsList.size() - 1)){
playSong(currentSongIndex + 1);
currentSongIndex = currentSongIndex + 1;
}else{
// play first song
playSong(0);
currentSongIndex = 0;
}
}
});
/**
* Back button click event
* Plays previous song by currentSongIndex - 1
* */
btnPrevious.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
if(currentSongIndex > 0){
playSong(currentSongIndex - 1);
currentSongIndex = currentSongIndex - 1;
}else{
// play last song
playSong(songsList.size() - 1);
currentSongIndex = songsList.size() - 1;
}
}
});
/**
* Button Click event for Repeat button
* Enables repeat flag to true
* */
btnRepeat.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
if(isRepeat){
isRepeat = false;
Toast.makeText(getApplicationContext(), "Repeat is OFF", Toast.LENGTH_SHORT).show();
btnRepeat.setImageResource(R.drawable.btn_repeat);
}else{
// make repeat to true
isRepeat = true;
Toast.makeText(getApplicationContext(), "Repeat is ON", Toast.LENGTH_SHORT).show();
// make shuffle to false
isShuffle = false;
btnRepeat.setImageResource(R.drawable.btn_repeat_focused);
btnShuffle.setImageResource(R.drawable.btn_shuffle);
}
}
});
/**
* Button Click event for Shuffle button
* Enables shuffle flag to true
* */
btnShuffle.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
if(isShuffle){
isShuffle = false;
Toast.makeText(getApplicationContext(), "Shuffle is OFF", Toast.LENGTH_SHORT).show();
btnShuffle.setImageResource(R.drawable.btn_shuffle);
}else{
// make repeat to true
isShuffle= true;
Toast.makeText(getApplicationContext(), "Shuffle is ON", Toast.LENGTH_SHORT).show();
// make shuffle to false
isRepeat = false;
btnShuffle.setImageResource(R.drawable.btn_shuffle_focused);
btnRepeat.setImageResource(R.drawable.btn_repeat);
}
}
});
/**
* Button Click event for Play list click event
* Launches list activity which displays list of songs
* */
btnPlaylist.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
Intent i = new Intent(getApplicationContext(), PlayListActivity.class);
startActivityForResult(i, 100);
}
});
eq.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
Intent i = new Intent(getApplicationContext(), EQ.class);
startActivityForResult(i, 100);
}
});
}
/**
* Receiving song index from playlist view
* and play the song
* */
@Override
protected void onActivityResult(int requestCode,
int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(resultCode == 100){
currentSongIndex = data.getExtras().getInt("songPath");
// play selected song
playSong(currentSongIndex);
}
}
/**
* Function to play a song
* @param songIndex - index of song
* */
public void playSong(int songIndex){
// Play song
try {
mp.reset();
mp.setDataSource(songsList.get(songIndex).get("songPath"));
mp.prepare();
mp.start();
// Displaying Song title
String songTitle = songsList.get(songIndex).get("songTitle");
songTitleLabel.setText(songTitle);
// Changing Button Image to pause image
btnPlay.setImageResource(R.drawable.btn_pause);
// set Progress bar values
songProgressBar.setProgress(0);
songProgressBar.setMax(100);
// Updating progress bar
updateProgressBar();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* Update timer on seekbar
* */
public void updateProgressBar() {
mHandler.postDelayed(mUpdateTimeTask, 100);
}
/**
* Background Runnable thread
* */
private Runnable mUpdateTimeTask = new Runnable() {
public void run() {
long totalDuration = mp.getDuration();
long currentDuration = mp.getCurrentPosition();
// Displaying Total Duration time
songTotalDurationLabel.setText(""+utils.milliSecondsToTimer(totalDuration));
// Displaying time completed playing
songCurrentDurationLabel.setText(""+utils.milliSecondsToTimer(currentDuration));
// Updating progress bar
int progress = (int)(utils.getProgressPercentage(currentDuration, totalDuration));
//Log.d("Progress", ""+progress);
songProgressBar.setProgress(progress);
// Running this thread after 100 milliseconds
mHandler.postDelayed(this, 100);
}
};
private boolean doubleBackToExitPressedOnce;
/**
*
* */
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromTouch) {
}
/**
* When user starts moving the progress handler
* */
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// remove message Handler from updating progress bar
mHandler.removeCallbacks(mUpdateTimeTask);
}
/**
* When user stops moving the progress hanlder
* */
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
mHandler.removeCallbacks(mUpdateTimeTask);
int totalDuration = mp.getDuration();
int currentPosition = utils.progressToTimer(seekBar.getProgress(), totalDuration);
// forward or backward to certain seconds
mp.seekTo(currentPosition);
// update timer progress again
updateProgressBar();
}
/**
* On Song Playing completed
* if repeat is ON play same song again
* if shuffle is ON play random song
* */
@Override
public void onCompletion(MediaPlayer arg0) {
// check for repeat is ON or OFF
if(isRepeat){
// repeat is on play same song again
playSong(currentSongIndex);
} else if(isShuffle){
// shuffle is on - play a random song
Random rand = new Random();
currentSongIndex = rand.nextInt((songsList.size() - 1) - 0 + 1) + 0;
playSong(currentSongIndex);
} else{
// no repeat or shuffle ON - play next song
if(currentSongIndex < (songsList.size() - 1)){
playSong(currentSongIndex + 1);
currentSongIndex = currentSongIndex + 1;
}else{
// play first song
playSong(0);
currentSongIndex = 0;
}
}
}
@Override
public void onDestroy(){
super.onDestroy();
mHandler.removeCallbacks(mUpdateTimeTask);
mp.release();
}
@Override
public void onBackPressed() {
if (doubleBackToExitPressedOnce) {
super.onBackPressed();
return;
}
this.doubleBackToExitPressedOnce = true;
Toast.makeText(this, "Please Double Tap To Exit!", Toast.LENGTH_SHORT).show();
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
doubleBackToExitPressedOnce=false;
}
}, 2000);
}
}
And Finally my Class file for MediaStore:
Code:
public class SongsManager {
public SongsManager() {
}
private ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>();
public ArrayList<HashMap<String, String>> getPlayList(Context c) {
/*use content provider to get beginning of database query that queries for all audio by display name, path
and mimtype which i dont use but got it incase you want to scan for mp3 files only you can compare with RFC mimetype for mp3's
*/
final Cursor mCursor = c.getContentResolver().query(
MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
new String[] { MediaStore.Audio.Media.DISPLAY_NAME, MediaStore.Audio.Media.DATA,MediaStore.Audio.Media.MIME_TYPE }, null, null,
"LOWER(" + MediaStore.Audio.Media.TITLE + ") ASC");
String songTitle = "";
String songPath = "";
/* run through all the columns we got back and save the data we need into the arraylist for our listview*/
if (mCursor.moveToFirst()) {
do {
mCursor.getString(mCursor.getColumnIndexOrThrow(MediaStore.Audio.Media.MIME_TYPE));
songTitle = mCursor.getString(mCursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DISPLAY_NAME));
songPath = mCursor.getString(mCursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA));
HashMap<String, String> song = new HashMap<String, String>();
song.put("songTitle", songTitle);
song.put("songPath", songPath);
songsList.add(song);
} while (mCursor.moveToNext());
}
mCursor.close(); //cursor has been consumed so close it
return songsList;
}
public ArrayList<HashMap<String, String>> getPlayList() {
// TODO Auto-generated method stub
return null;
}
So yeah the more help the better because i still have so much more stuff to do till its PlayStore ready!
Sorry about all the codes, i just want to make sure the answers are going work with my current code
Thank You
Ryan

Yeah, that's much code, but you didn't write the most important thing: WHAT is your problem with this code?
Regards

I need help with being able to play a song from a ListView using mediastore. So say someone click on the song they want to listen to, they click it and then it switches to the main players activity and plays the song.
It was working at one point but now it doesn't

How do I implement a onscroll Listener to my listview?

I have a large data to load from JSON.
I have implemented a custom list view by following a tutorial, now since the data is huge I want it load as the user scrolls.
This is my LoadRestaurant class code which is inside the main activity.
Code:
class LoadRestaurants extends AsyncTask<String, String, String> {
//Show Progress Dialog
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(SearchAll.this);
pDialog.setMessage("Loading All Restaurants...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
protected String doInBackground(String... arg) {
//building parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
//Getting JSON from URL
String json = jsonParser.makeHttpRequest(URL_RESTAURANT_LIST, "GET", params);
//Log Cat Response Check
Log.d("Areas JSON: ", "> " + json);
try {
restaurants = new JSONArray(json);
if (restaurants != null) {
//loop through all restaurants
for (int i = 0; i < restaurants.length(); i++) {
JSONObject c = restaurants.getJSONObject(i);
//Storing each json object in the variable.
String id = c.getString(TAG_ID);
String name = c.getString(TAG_NAME);
String location = c.getString(TAG_LOCATION);
String rating = c.getString(TAG_RATING);
//Creating New Hashmap
HashMap<String, String> map = new HashMap<String, String>();
//adding each child node to Hashmap key
map.put(TAG_ID, id);
map.put(TAG_NAME, name);
map.put(TAG_LOCATION, location);
map.put(TAG_RATING, rating);
//adding HashList to ArrayList
restaurant_list.add(map);
}
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
protected void onPostExecute(String file_url) {
//dismiss the dialog
pDialog.dismiss();
//Updating UI from the Background Thread
runOnUiThread(new Runnable() {
@Override
public void run() {
ListAdapter adapter = new SimpleAdapter(
SearchAll.this, restaurant_list,
R.layout.listview_restaurants, new String[]{
TAG_ID, TAG_NAME, TAG_LOCATION, TAG_RATING}, new int[]{
R.id.login_id, R.id.restaurant_name, R.id.address, R.id.rating});
setListAdapter(adapter);
ListView lv = getListView();
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// Bundle bundle = new Bundle();
Intent intent = new Intent(SearchAll.this, RestaurantProfile.class);
String loginId = ((TextView) view.findViewById(R.id.login_id)).getText().toString();
intent.putExtra("login_id", loginId);
startActivity(intent);
}
});
}
});
}
}
}
I want to load around 20 restaurants and then it auto loads another 20 as soon as user reaches the end of first 20.
There are lots of tutorials online but its confusing to implement.
Please help me out!

The custom ListView, support for automatic loading you can try https://github.com/chrisbanes/Android-PullToRefresh

BLE Application (Display data from characteristic in a textView)

I used the BluetoothLeGatt example code to write an app that automatically connects to a bonded BLE peripheral upon launching the app. Now i am trying to display the data from one of the peripheral's characteristic in a textView. The BluetoothLeGatt example code only demonstrates this using ExpandableListView.OnChildClickListener, my app should require no user input and simply get he data from the characteristic. This is what i have so far:
Code:
private TextView mConnectionState;
private TextView mDataField;
private String mDeviceName;
private String mDeviceAddress;
private ExpandableListView mGattServicesList;
private BluetoothLeService mBluetoothLeService;
private boolean mConnected = false;
private BluetoothGattCharacteristic mNotifyCharacteristic;
private final String LIST_NAME = "NAME";
private final String LIST_UUID = "UUID";
// Code to manage Service lifecycle.
private final ServiceConnection mServiceConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName componentName, IBinder service) {
mBluetoothLeService = ((BluetoothLeService.LocalBinder) service).getService();
if (!mBluetoothLeService.initialize()) {
Log.e(TAG, "Unable to initialize Bluetooth");
finish();
}
// Automatically connects to the device upon successful start-up initialization.
mBluetoothLeService.connect(mDeviceAddress);
}
@Override
public void onServiceDisconnected(ComponentName componentName) {
mBluetoothLeService = null;
}
};
// Handles various events fired by the Service.
// ACTION_GATT_CONNECTED: connected to a GATT server.
// ACTION_GATT_DISCONNECTED: disconnected from a GATT server.
// ACTION_GATT_SERVICES_DISCOVERED: discovered GATT services.
// ACTION_DATA_AVAILABLE: received data from the device. This can be a result of read
// or notification operations.
private final BroadcastReceiver mGattUpdateReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
final String action = intent.getAction();
if (BluetoothLeService.ACTION_GATT_CONNECTED.equals(action)) {
mConnected = true;
updateConnectionState(R.string.connected);
mConnectionState.setTextColor(Color.parseColor("#FF17AA00"));
invalidateOptionsMenu();
} else if (BluetoothLeService.ACTION_GATT_DISCONNECTED.equals(action)) {
mConnected = false;
updateConnectionState(R.string.disconnected);
invalidateOptionsMenu();
clearUI();
} else if (BluetoothLeService.ACTION_GATT_SERVICES_DISCOVERED.equals(action)) {
*edit*
UUID chara = UUID.fromString("c97433f0-be8f-4dc8-b6f0-5343e6100eb4");
List<BluetoothGattService> servs = mBluetoothLeService.getSupportedGattServices();
for (int i = 0; servs.size() > i; i++) {
List<BluetoothGattCharacteristic> charac = servs.get(i).getCharacteristics();
for (int j = 0; charac.size() > i; i++) {
BluetoothGattCharacteristic ch = charac.get(i);
if (ch.getUuid() == chara) {
mBluetoothLeService.readCharacteristic(ch);
mBluetoothLeService.setCharacteristicNotification(ch, true);
}
}
}
} else if (BluetoothLeService.ACTION_DATA_AVAILABLE.equals(action)) {
displayData(intent.getStringExtra(BluetoothLeService.EXTRA_DATA));
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_device_control);
final Intent intent = getIntent();
mDeviceName = intent.getStringExtra(EXTRAS_DEVICE_NAME);
mDeviceAddress = intent.getStringExtra(EXTRAS_DEVICE_ADDRESS);
mConnectionState = (TextView) findViewById(R.id.connection_state);
mDataField = (TextView) findViewById(R.id.data);
Intent gattServiceIntent = new Intent(this, BluetoothLeService.class);
bindService(gattServiceIntent, mServiceConnection, BIND_AUTO_CREATE);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
}
@Override
protected void onResume() {
super.onResume();
registerReceiver(mGattUpdateReceiver, makeGattUpdateIntentFilter());
if (mBluetoothLeService != null) {
final boolean result = mBluetoothLeService.connect(mDeviceAddress);
Log.d(TAG, "Connect request result=" + result);
}
}
@Override
protected void onPause() {
super.onPause();
unregisterReceiver(mGattUpdateReceiver);
}
@Override
protected void onDestroy() {
super.onDestroy();
unbindService(mServiceConnection);
mBluetoothLeService = null;
}
private void updateConnectionState(final int resourceId) {
runOnUiThread(new Runnable() {
@Override
public void run() {
mConnectionState.setText(resourceId);
}
});
}
private void displayData(String data) {
if (data != null) {
mDataField.setText(data);
}
}
private void clearUI() {
mGattServicesList.setAdapter((SimpleExpandableListAdapter) null);
mDataField.setText(R.string.no_data);
}
private static IntentFilter makeGattUpdateIntentFilter() {
final IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(BluetoothLeService.ACTION_GATT_CONNECTED);
intentFilter.addAction(BluetoothLeService.ACTION_GATT_DISCONNECTED);
intentFilter.addAction(BluetoothLeService.ACTION_GATT_SERVICES_DISCOVERED);
intentFilter.addAction(BluetoothLeService.ACTION_DATA_AVAILABLE);
return intentFilter;
}
I've successfully connected to an already bonded device, but now im trying to get the data from a characteristic using its uuid and display it in a textView. The BluetoothLeGatt example shows how a characteristic is selected by a user using an expandable list view onclick listener displaying the supported characteristics. I want to bypass all that and just get the data from the characteristic with the known uuid.
-EDIT-
figured it out