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How do i modify data on my MainActivity from Settings Activity?

I've tried many other threads and articles but I just can't find the right stuff that I am looking for.
So I have a MainActivity and a SettingsActivity both are java classes. In my main activity there is a button when pressed, increases the count by +1, and shows it on a TextView, it also makes the device vibrate on every increment/Every button press. I want to make a switchpreference in SettingsActivity which if kept off/false, turns off the vibration on button press and if kept on/true, turns on the vibration on button press.
I don't know how to retrieve the state of SwitchPreferenceCompat(ON OR OFF) from SettingsActivity and use it in the MainActivity, so if the user turns the switch off in setting activity, the vibration should stop on button press which is in MainActivity.
I have already used Shared Preferences in MainActivity for saving the current count/number when App is closed and resumes from the same count when reopened.
MainAcitivity
package com.saad.tapcounter;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.constraintlayout.widget.ConstraintLayout;
import androidx.preference.PreferenceManager;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Color;
import android.os.Bundle;
import android.os.Vibrator;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.Switch;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdView;
import com.google.android.gms.ads.MobileAds;
public class MainActivity extends AppCompatActivity {
private AdView mAdView ;
int Start;
TextView txt;
Button btnU,btnT,btnR;
Switch sw,sw2;
private ConstraintLayout Clayout;
Vibrator vibe;
Boolean switchPref;
SharedPreferences sharedPreferences;
private static long back_pressed;
private Vibrator Vibrator;
//Double Tap Exit
#Override
public void onBackPressed()
{
if (back_pressed + 2000 > System.currentTimeMillis()) super.onBackPressed();
else Toast.makeText(getBaseContext(), "Press once again to exit!", Toast.LENGTH_SHORT).show();
back_pressed = System.currentTimeMillis();
}
//Inflater for Menu
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu,menu);
return true;
}
//Menu
#Override
public boolean onOptionsItemSelected(#NonNull MenuItem item) {
switch(item.getItemId()){
case R.id.menui1:
startActivity(new Intent(this, SettingsActivity.class));
return true;
default:
return super.onOptionsItemSelected(item);
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = findViewById(R.id.toolbarid);
setSupportActionBar(toolbar);
MobileAds.initialize(this, "-APPID-");
mAdView = findViewById(R.id.adView);
AdRequest adRequest = new AdRequest.Builder().build();
mAdView.loadAd(adRequest);
vibe =(Vibrator)getSystemService(VIBRATOR_SERVICE);
Clayout = findViewById(R.id.MainLayout);
btnT = findViewById(R.id.tapbtn);
btnR = findViewById(R.id.resetbtn);
btnU = findViewById(R.id.undobtn);
sw = findViewById(R.id.swch);
sw2 = findViewById(R.id.darkswch);
txt = findViewById(R.id.txtv);
txt.setTextColor(Color.BLACK);
sharedPreferences = getSharedPreferences("0",MODE_PRIVATE);
loadData();
setData();
incrementbtn();
undobtn();
resetbtn();
switchbtn();
themeswitch();
}
public void loadData(){
sharedPreferences = getSharedPreferences("0",MODE_PRIVATE);
}
private void setData(){
Start = sharedPreferences.getInt("0",0);
if(Start==0){
txt.setText("0");
}
else{
txt.setText(Integer.toString(Start));
}
}
public void incrementbtn(){
btnT.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
incvibe();
if (Start != 0) {
Start = sharedPreferences.getInt("0", 0);
Start += 1;
txt.setText(Integer.toString(Start));
txtresize();
} else {
Start += 1;
txt.setText(Integer.toString(Start));
}
sharedPreferences.edit().putInt("0", Start).apply();
}
});
}
public void undobtn(){
btnU.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
undovibe();
if (Start != 0) {
Start = sharedPreferences.getInt("0", 0);
Start -= 1;
txt.setText(Integer.toString(Start));
}
else{
return;
}
sharedPreferences.edit().putInt("0", Start).apply();
}
});
}
public void resetbtn(){
btnR.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
resetvibe();
Start = 0;
txt.setText(Integer.toString(Start));
sharedPreferences.edit().putInt("0", Start).apply();
}
});
}
public void switchbtn(){
sw.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(sw.isChecked()) {
btnR.setEnabled(false);
btnT.setEnabled(false);
btnU.setEnabled(false);
txt.setTextColor(Color.RED);
}
else{
btnR.setEnabled(true);
btnT.setEnabled(true);
btnU.setEnabled(true);
if(sw2.isChecked()){
txt.setTextColor(Color.WHITE);
}
else{
txt.setTextColor(Color.BLACK);
}
}
}
});
}
public void themeswitch(){
sw2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(sw2.isChecked()){
Clayout.setBackgroundColor(Color.DKGRAY);
if(sw.isChecked()){
txt.setTextColor(Color.RED);
}
else{
txt.setTextColor(Color.WHITE);
}
}
else{
Clayout.setBackgroundColor(Color.WHITE);
if(sw.isChecked()){
txt.setTextColor(Color.RED);
}
else{
txt.setTextColor(Color.BLACK);
}
}
}
});
}
public void txtresize(){
if(Start > 1000 && Start < 10000){
txt.setTextSize(80);
}
else if (Start > 10000 && Start < 100000){
txt.setTextSize(60);
}
else if (Start > 100000){
txt.setTextSize(40);
}
else{
return;
}
}
StringBuilder info = new StringBuilder();
public void undovibe(){
vibe.vibrate(100);
}
public void resetvibe(){
vibe.vibrate(150);
}
public void incvibe(){
vibe.vibrate(40);
}
}//Real one
SettingActivity (created it from NEW > SettingActivity)
I did try some stuff by myself in here but it crashed my app.
package com.saad.tapcounter;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.widget.Toast;
import androidx.appcompat.app.ActionBar;
import androidx.appcompat.app.AppCompatActivity;
import androidx.preference.PreferenceFragmentCompat;
import androidx.preference.PreferenceManager;
public class SettingsActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.settings_activity);
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.settings, new SettingsFragment())
.commit();
ActionBar actionBar = getSupportActionBar();
if (actionBar != null) {
actionBar.setDisplayHomeAsUpEnabled(true);
}
}
public static class SettingsFragment extends PreferenceFragmentCompat {
#Override
public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
setPreferencesFromResource(R.xml.root_preferences, rootKey);
}
}
}
root_preference.xml
<PreferenceScreen xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android">
<PreferenceCategory app:title="Settings"
app:iconSpaceReserved="false">
<SwitchPreferenceCompat
app:key="Switchsett1"
app:title="Vibration"
app:summaryOff="Turn Vibration On"
app:summaryOn="Turn Vibration Off"
app:iconSpaceReserved="false"
app:defaultValue="true"
/>
<SwitchPreferenceCompat
app:key="Switchset2"
app:iconSpaceReserved="false"
app:summaryOff="#string/attachment_summary_off"
app:summaryOn="#string/attachment_summary_on"
app:title="#string/attachment_title" />
</PreferenceCategory>
</PreferenceScreen>

I don't know how to retrieve the state of switch(ON OR OFF) from SettingsActivity
To get the value of SwitchPreferenceCompat from shared preference, then you need to retrieve it as a Boolean
Now the key of your first SwitchPreferenceCompat is Switchsett1, so to retrieve the value of this:
public class MainActivity extends AppCompatActivity {
Boolean switchPref;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
....
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
switchPref = prefs.getBoolean("Switchsett1", false);
Toast.makeText(this, String.valueOf(switchPref), Toast.LENGTH_SHORT).show(); // shows true if the SwitchPreferenceCompat is ON, and false if OFF.
Now the Toast in the above script shows true if the SwitchPreferenceCompat is ON, and false if it's OFF.
You can do the same for Switchset2 SwitchPreferenceCompat

Sound cannot be played in the emulator

I have set a sound in a "raw" file. However, when I put everything together, the original click sound on emulator is playing but my "mouse click" sound is not.
I have my mouse click sound set to "sound1".
The sound is only 1 second long I do not know if that matters.
activity_main
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center"
tools:context=".MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Activity1" />
<ImageButton
android:id="#+id/Special_Button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#android:color/transparent"
android:src="#drawable/button_images"
android:onClick="playSound"/>
</LinearLayout>
main activity
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
AudioAttributes audioAttributes = new AudioAttributes.Builder()
.setUsage(AudioAttributes.USAGE_ASSISTANCE_SONIFICATION)
.setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
.build();
soundPool = new SoundPool.Builder()
.setMaxStreams(1)
.setAudioAttributes(audioAttributes)
.build();
} else {
soundPool = new SoundPool(1, AudioManager.STREAM_MUSIC,
0);
}
sound1 = soundPool.load(this, R.raw.sound1, 1);
button = findViewById(R.id.Special_Button);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
openActivity2();
}
});
}
public void openActivity2() {
Intent intent = new Intent(this, Activity2.class);
startActivity(intent);
}
public void playSound(View v) {
soundPool.play(R.raw.sound1, 1,1,0
,0,1);
}
#Override
protected void onDestroy() {
super.onDestroy();
soundPool.release();
soundPool = null;
}
}

Looks like you have implemented an onClick in your XML, as well as setOnClickListener in your Java.
So as far as I can tell, your code is running the onClickListener which is starting your openActivity2() method, and skipping the playSound() method.
Try removing the onClick in your XML and integrating playSound() into the setOnClickListener instead.
You could also add in AudioFocus request.
This code works: In my case I have used a fragment class but this can be used in any activity.
import android.content.Context;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
public class fragment1 extends Fragment {
//These are the declarations
Button btn;
MediaPlayer mMediaPlayer;
private AudioManager mAudioManager;
//This tells the media player what to do if AudioFocus is changed
private AudioManager.OnAudioFocusChangeListener
mOnAudioFocusChangeListener =
new AudioManager.OnAudioFocusChangeListener() {
#Override
public void onAudioFocusChange(int focusChange) {
if (focusChange == AudioManager.AUDIOFOCUS_LOSS_TRANSIENT ||
focusChange == AudioManager.AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK){
mMediaPlayer.pause();
mMediaPlayer.seekTo(0);
} else if (focusChange == AudioManager.AUDIOFOCUS_GAIN){
mMediaPlayer.start();
}else if (focusChange == AudioManager.AUDIOFOCUS_LOSS){
releaseMediaPlayer();
}
}
};
//This tells the media player what to do when the playback is done
private MediaPlayer.OnCompletionListener mOnCompletionListener = new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
releaseMediaPlayer();
}
};
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.**YOUR LAYOUT HERE**,container,false);
//This assigns the audio manager to this view
mAudioManager = (AudioManager) getActivity().getSystemService(Context.AUDIO_SERVICE);
btn = view.findViewById(R.id.btn);
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
/* First calls the releaseMediaPlayer() method to make sure there
* are no other instances of the media player that exist.
*/
releaseMediaPlayer();
//This requests the AudioFocus
int result = mAudioManager.requestAudioFocus(mOnAudioFocusChangeListener,
AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN_TRANSIENT);
//This if statement deals with the above request
if (result == AudioManager.AUDIOFOCUS_REQUEST_GRANTED){
mMediaPlayer = MediaPlayer.create(getActivity(), **YOUR MEDIA RESOURCE HERE**);
mMediaPlayer.start();
mMediaPlayer.setOnCompletionListener(mOnCompletionListener);
}
}
});
return view;
}
//This tells the media player to stop if the app is closed
#Override
public void onStop(){
super.onStop();
releaseMediaPlayer();
}
//This method is to release the instance of the media player
private void releaseMediaPlayer(){
if (mMediaPlayer != null){
mMediaPlayer.release();
mMediaPlayer = null;
mAudioManager.abandonAudioFocus(mOnAudioFocusChangeListener);
}
}
}

How to implement session for intro slider which don't have layout activity

I want to implement session for intro slide which when after installing the app for the first time I want to appear it and for the second time kill it.. but I don't know implement it because it doesn't have layout.. and not working
IntroActivity.java
package com.gnex_tech.bugisberdagang;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import agency.tango.materialintroscreen.MaterialIntroActivity;
import agency.tango.materialintroscreen.SlideFragmentBuilder;
public class IntroActivity extends MaterialIntroActivity {
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setSkipButtonVisible();
enableLastSlideAlphaExitTransition(true);
addSlide(new SlideFragmentBuilder()
.backgroundColor(R.color.bg_screen1)
.buttonsColor(R.color.btn_screen1)
.image(R.drawable.welcome_slider_1)
.title(getString(R.string.intro_title1))
.description(getString(R.string.intro_desc_title1))
.build());
addSlide(new SlideFragmentBuilder()
.backgroundColor(R.color.bg_screen2)
.buttonsColor(R.color.btn_screen2)
.image(R.drawable.welcome_slider_2)
.title(getString(R.string.intro_title2))
.description(getString(R.string.intro_desc_title2))
.build());
addSlide(new SlideFragmentBuilder()
.backgroundColor(R.color.bg_screen3)
.buttonsColor(R.color.btn_screen3)
.image(R.drawable.welcome_slider_3)
.title(getString(R.string.intro_title3))
.description(getString(R.string.intro_desc_title3))
.build());
}
#Override
public void onFinish() {
Intent intent = new Intent(IntroActivity.this, MainActivity.class);
startActivity(intent);
finish();
}
}
and Session.java
package com.gnex_tech.bugisberdagang;
import android.content.Context;
import android.content.SharedPreferences;
/**
* Created by KurnhyGNEX on 26/12/2017.
*/
public class Session {
SharedPreferences pref;
SharedPreferences.Editor editor;
Context _context;
// shared pref mode
int PRIVATE_MODE = 0;
// Shared preferences file name
private static final String PREF_NAME = "snow-intro-slider";
private static final String IS_FIRST_TIME_LAUNCH = "IsFirstTimeLaunch";
public Session(Context context) {
this._context = context;
pref = _context.getSharedPreferences(PREF_NAME, PRIVATE_MODE);
editor = pref.edit();
}
public void setFirstTimeLaunch(boolean isFirstTime) {
editor.putBoolean(IS_FIRST_TIME_LAUNCH, isFirstTime);
editor.commit();
}
public boolean isFirstTimeLaunch() {
return pref.getBoolean(IS_FIRST_TIME_LAUNCH, true);
}
}
when I insert this code in IntroActivity.java after super.onCreate
session = new Session(this);
if (!session.isFirstTimeLaunch()) {
launchHomeScreen();
finish();
}
private void launchHomeScreen() {
session.setFirstTimeLaunch(false);
startActivity(new Intent(WelcomeActivity.this, MainActivity.class));
finish();
}
it's not working, please give me some advice

i have tried this , and it is working code :
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.text.Html;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;
public class WelcomeActivity extends AppCompatActivity {
private ViewPager viewPager;
private MyViewPagerAdapter myViewPagerAdapter;
private LinearLayout dotsLayout;
private TextView[] dots;
private int[] layouts;
private Button btnSkip, btnNext;
private PrefManager prefManager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Checking for first time launch - before calling setContentView()
prefManager = new PrefManager(this);
if (!prefManager.isFirstTimeLaunch()) {
launchHomeScreen();
finish();
}
// Making notification bar transparent
if (Build.VERSION.SDK_INT >= 21) {
getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
}
setContentView(R.layout.activity_welcome);
viewPager = (ViewPager) findViewById(R.id.view_pager);
dotsLayout = (LinearLayout) findViewById(R.id.layoutDots);
btnSkip = (Button) findViewById(R.id.btn_skip);
btnNext = (Button) findViewById(R.id.btn_next);
// layouts of all welcome sliders
// add few more layouts if you want
layouts = new int[]{
R.layout.welcome_slider_one,
R.layout.welcome_slider_two,
R.layout.welcome_slider_three,
R.layout.welcome_slider_four};
// adding bottom dots
addBottomDots(0);
// making notification bar transparent
changeStatusBarColor();
myViewPagerAdapter = new MyViewPagerAdapter();
viewPager.setAdapter(myViewPagerAdapter);
viewPager.addOnPageChangeListener(viewPagerPageChangeListener);
btnSkip.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
launchHomeScreen();
}
});
btnNext.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// checking for last page
// if last page home screen will be launched
int current = getItem(+1);
if (current < layouts.length) {
// move to next screen
viewPager.setCurrentItem(current);
} else {
launchHomeScreen();
}
}
});
}
private void addBottomDots(int currentPage) {
dots = new TextView[layouts.length];
int[] colorsActive = getResources().getIntArray(R.array.array_dot_active);
int[] colorsInactive = getResources().getIntArray(R.array.array_dot_inactive);
dotsLayout.removeAllViews();
for (int i = 0; i < dots.length; i++) {
dots[i] = new TextView(this);
dots[i].setText(Html.fromHtml("•"));
dots[i].setTextSize(35);
dots[i].setTextColor(colorsInactive[currentPage]);
dotsLayout.addView(dots[i]);
}
if (dots.length > 0)
dots[currentPage].setTextColor(colorsActive[currentPage]);
}
private int getItem(int i) {
return viewPager.getCurrentItem() + i;
}
private void launchHomeScreen() {
prefManager.setFirstTimeLaunch(false);
startActivity(new Intent(WelcomeActivity.this, MainActivity.class));
finish();
}
// viewpager change listener
ViewPager.OnPageChangeListener viewPagerPageChangeListener = new ViewPager.OnPageChangeListener() {
#Override
public void onPageSelected(int position) {
addBottomDots(position);
// changing the next button text 'NEXT' / 'GOT IT'
if (position == layouts.length - 1) {
// last page. make button text to GOT IT
btnNext.setText(getString(R.string.start));
btnSkip.setVisibility(View.GONE);
} else {
// still pages are left
btnNext.setText(getString(R.string.next));
btnSkip.setVisibility(View.VISIBLE);
}
}
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
#Override
public void onPageScrollStateChanged(int arg0) {
}
};
/**
* Making notification bar transparent
*/
private void changeStatusBarColor() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
Window window = getWindow();
window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
window.setStatusBarColor(Color.TRANSPARENT);
}
}
/**
* View pager adapter
*/
public class MyViewPagerAdapter extends PagerAdapter {
private LayoutInflater layoutInflater;
public MyViewPagerAdapter() {
}
#Override
public Object instantiateItem(ViewGroup container, int position) {
layoutInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = layoutInflater.inflate(layouts[position], container, false);
container.addView(view);
return view;
}
#Override
public int getCount() {
return layouts.length;
}
#Override
public boolean isViewFromObject(View view, Object obj) {
return view == obj;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
View view = (View) object;
container.removeView(view);
}
}
}
activity_welcome.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v4.view.ViewPager
android:id="#+id/view_pager"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<LinearLayout
android:id="#+id/layoutDots"
android:layout_width="match_parent"
android:layout_height="#dimen/dots_height"
android:layout_alignParentBottom="true"
android:layout_marginBottom="#dimen/dots_margin_bottom"
android:gravity="center"
android:orientation="horizontal" />
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_above="#id/layoutDots"
android:alpha=".5"
android:background="#android:color/white" />
<Button
android:id="#+id/btn_next"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:background="#null"
android:text="#string/next"
android:textColor="#android:color/white" />
<Button
android:id="#+id/btn_skip"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:background="#null"
android:text="#string/skip"
android:textColor="#android:color/white" />
</RelativeLayout>
PrefManager class
public class PrefManager {
SharedPreferences pref;
SharedPreferences.Editor editor;
Context _context;
// shared pref mode
int PRIVATE_MODE = 0;
// Shared preferences file name
private static final String PREF_NAME = "welcome";
private static final String IS_FIRST_TIME_LAUNCH = "IsFirstTimeLaunch";
public PrefManager(Context context) {
this._context = context;
pref = _context.getSharedPreferences(PREF_NAME, PRIVATE_MODE);
editor = pref.edit();
}
public void setFirstTimeLaunch(boolean isFirstTime) {
editor.putBoolean(IS_FIRST_TIME_LAUNCH, isFirstTime);
editor.commit();
}
public boolean isFirstTimeLaunch() {
return pref.getBoolean(IS_FIRST_TIME_LAUNCH, true);
}
}

how to implement OnItemClickListener in this code?

I want to implement OnItemClickListener in this ListView ,But when i add code for this,my app will not work even there is no error. its closes automatically when I click on the Listview item. Please help me, I am a beginner in Android. I am adding my whole code here.
I am doing a bluetooth device connectivity code.
MainActivity.java
import java.util.ArrayList;
import java.util.Set;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.app.Activity;
import android.app.ProgressDialog;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
public class MainActivity extends Activity {
private TextView mStatusTv;
private Button mActivateBtn;
private Button mPairedBtn;
private Button mScanBtn;
private Button ledBtn;
private ProgressDialog mProgressDlg;
private ArrayList<BluetoothDevice> mDeviceList = new ArrayList<BluetoothDevice>();
private BluetoothAdapter mBluetoothAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mStatusTv = (TextView) findViewById(R.id.tv_status);
mActivateBtn = (Button) findViewById(R.id.btn_enable);
mPairedBtn = (Button) findViewById(R.id.btn_view_paired);
mScanBtn = (Button) findViewById(R.id.btn_scan);
ledBtn = (Button) findViewById(R.id.led);
ledBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent i=new Intent(getApplicationContext(),Ledbuttons.class);
startActivity(i);
}
});
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
mProgressDlg = new ProgressDialog(this);
mProgressDlg.setMessage("Scanning...");
mProgressDlg.setCancelable(false);
mProgressDlg.setButton(DialogInterface.BUTTON_NEGATIVE, "Cancel", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
mBluetoothAdapter.cancelDiscovery();
}
});
if (mBluetoothAdapter == null) {
showUnsupported();
} else {
mPairedBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
if (pairedDevices == null || pairedDevices.size() == 0) {
showToast("No Paired Devices Found");
} else {
ArrayList<BluetoothDevice> list = new ArrayList<BluetoothDevice>();
list.addAll(pairedDevices);
Intent intent = new Intent(MainActivity.this, DeviceListActivity.class);
intent.putParcelableArrayListExtra("device.list", list);
startActivity(intent);
}
}
});
mScanBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
mBluetoothAdapter.startDiscovery();
}
});
mActivateBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (mBluetoothAdapter.isEnabled()) {
mBluetoothAdapter.disable();
showDisabled();
} else {
Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(intent, 1000);
}
}
});
if (mBluetoothAdapter.isEnabled()) {
showEnabled();
} else {
showDisabled();
}
}
IntentFilter filter = new IntentFilter();
filter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
filter.addAction(BluetoothDevice.ACTION_FOUND);
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
registerReceiver(mReceiver, filter);
}
#Override
public void onPause() {
if (mBluetoothAdapter != null) {
if (mBluetoothAdapter.isDiscovering()) {
mBluetoothAdapter.cancelDiscovery();
}
}
super.onPause();
}
#Override
public void onDestroy() {
unregisterReceiver(mReceiver);
super.onDestroy();
}
private void showEnabled() {
mStatusTv.setText("Bluetooth is On");
mStatusTv.setTextColor(Color.BLUE);
mActivateBtn.setText("Disable");
mActivateBtn.setEnabled(true);
mPairedBtn.setEnabled(true);
mScanBtn.setEnabled(true);
ledBtn.setEnabled(true);
}
private void showDisabled() {
mStatusTv.setText("Bluetooth is Off");
mStatusTv.setTextColor(Color.RED);
mActivateBtn.setText("Enable");
mActivateBtn.setEnabled(true);
mPairedBtn.setEnabled(false);
mScanBtn.setEnabled(false);
ledBtn.setEnabled(false);
}
private void showUnsupported() {
mStatusTv.setText("Bluetooth is unsupported by this device");
mActivateBtn.setText("Enable");
mActivateBtn.setEnabled(false);
mPairedBtn.setEnabled(false);
mScanBtn.setEnabled(false);
}
private void showToast(String message) {
Toast.makeText(getApplicationContext(), message, Toast.LENGTH_SHORT).show();
}
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BluetoothAdapter.ACTION_STATE_CHANGED.equals(action)) {
final int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR);
if (state == BluetoothAdapter.STATE_ON) {
showToast("Enabled");
showEnabled();
}
} else if (BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)) {
mDeviceList = new ArrayList<BluetoothDevice>();
mProgressDlg.show();
} else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
mProgressDlg.dismiss();
Intent newIntent = new Intent(MainActivity.this, DeviceListActivity.class);
newIntent.putParcelableArrayListExtra("device.list", mDeviceList);
startActivity(newIntent);
} else if (BluetoothDevice.ACTION_FOUND.equals(action)) {
BluetoothDevice device = (BluetoothDevice) intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
mDeviceList.add(device);
showToast("Found device " + device.getName());
}
}
};
DeviceListActivity.java
import java.lang.reflect.Method;
import java.util.ArrayList;
import android.app.Activity;
import android.bluetooth.BluetoothDevice;
import android.os.Bundle;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.view.View;
import android.widget.ListView;
import android.widget.Toast;
public class DeviceListActivity extends Activity {
private ListView mListView;
private DeviceListAdapter mAdapter;
private ArrayList<BluetoothDevice> mDeviceList;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mDeviceList = getIntent().getExtras().getParcelableArrayList("device.list");
mListView = (ListView) findViewById(R.id.lv_paired);
mAdapter = new DeviceListAdapter(this);
mAdapter.setData(mDeviceList);
mAdapter.setListener(new DeviceListAdapter.OnPairButtonClickListener() {
#Override
public void onPairButtonClick(int position) {
BluetoothDevice device = mDeviceList.get(position);
if (device.getBondState() == BluetoothDevice.BOND_BONDED) {
unpairDevice(device);
} else {
showToast("Pairing...");
pairDevice(device);
}
}
});
mListView.setAdapter(mAdapter);
registerReceiver(mPairReceiver, new IntentFilter(BluetoothDevice.ACTION_BOND_STATE_CHANGED));
}
#Override
public void onDestroy() {
unregisterReceiver(mPairReceiver);
super.onDestroy();
}
private void showToast(String message) {
Toast.makeText(getApplicationContext(), message, Toast.LENGTH_SHORT).show();
}
private void pairDevice(BluetoothDevice device) {
try {
Method method = device.getClass().getMethod("createBond", (Class[]) null);
method.invoke(device, (Object[]) null);
} catch (Exception e) {
e.printStackTrace();
}
}
private void unpairDevice(BluetoothDevice device) {
try {
Method method = device.getClass().getMethod("removeBond", (Class[]) null);
method.invoke(device, (Object[]) null);
} catch (Exception e) {
e.printStackTrace();
}
}
private final BroadcastReceiver mPairReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(action)) {
final int state = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE, BluetoothDevice.ERROR);
final int prevState = intent.getIntExtra(BluetoothDevice.EXTRA_PREVIOUS_BOND_STATE, BluetoothDevice.ERROR);
if (state == BluetoothDevice.BOND_BONDED && prevState == BluetoothDevice.BOND_BONDING) {
showToast("Paired");
} else if (state == BluetoothDevice.BOND_NONE && prevState == BluetoothDevice.BOND_BONDED){
showToast("Unpaired");
}
mAdapter.notifyDataSetChanged();
}
}
};
}
DeviceListAdapter.java
import java.util.List;
import android.bluetooth.BluetoothDevice;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.TextView;
public class DeviceListAdapter extends BaseAdapter{
private LayoutInflater mInflater;
private List<BluetoothDevice> mData;
private OnPairButtonClickListener mListener;
public DeviceListAdapter(Context context) {
mInflater = LayoutInflater.from(context);
}
public void setData(List<BluetoothDevice> data) {
mData = data;
}
public void setListener(OnPairButtonClickListener listener) {
mListener = listener;
}
public int getCount() {
return (mData == null) ? 0 : mData.size();
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return position;
}
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.list_item_device, null);
holder = new ViewHolder();
holder.nameTv = (TextView) convertView.findViewById(R.id.tv_name);
holder.addressTv = (TextView) convertView.findViewById(R.id.tv_address);
holder.pairBtn = (Button) convertView.findViewById(R.id.btn_pair);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
BluetoothDevice device = mData.get(position);
holder.nameTv.setText(device.getName());
holder.addressTv.setText(device.getAddress());
holder.pairBtn.setText((device.getBondState() == BluetoothDevice.BOND_BONDED) ? "Unpair" : "Pair");
holder.pairBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (mListener != null) {
mListener.onPairButtonClick(position);
}
}
});
return convertView;
}
static class ViewHolder {
TextView nameTv;
TextView addressTv;
TextView pairBtn;
}
public interface OnPairButtonClickListener {
public abstract void onPairButtonClick(int position);
}
}
activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#060606"
android:orientation="vertical"
android:padding="#dimen/activity_vertical_margin" >
<TextView
android:id="#+id/tv_status"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="#string/text_bluetooth_off"
android:textColor="#ff0000"
android:textSize="17sp" />
<Button
android:id="#+id/btn_enable"
android:layout_width="match_parent"
android:layout_height="33dp"
android:layout_marginTop="#dimen/activity_vertical_margin"
android:background="#585858"
android:text="#string/text_enable" />
<Button
android:id="#+id/btn_view_paired"
android:layout_width="match_parent"
android:layout_height="33dp"
android:layout_marginTop="#dimen/activity_vertical_margin"
android:background="#585858"
android:enabled="false"
android:text="#string/text_view_paired"
android:textColor="#FFFFFF" />
<Button
android:id="#+id/btn_scan"
android:layout_width="match_parent"
android:layout_height="33dp"
android:layout_marginTop="#dimen/activity_vertical_margin"
android:background="#585858"
android:enabled="false"
android:text="#string/text_scan_devices"
android:textColor="#FFFFFF" />
<Button
android:id="#+id/led"
android:layout_width="match_parent"
android:layout_height="33dp"
android:layout_marginTop="#dimen/activity_vertical_margin"
android:background="#585858"
android:enabled="false"
android:text="LEDS"
android:textColor="#FFFFFF" />
<TextView
android:id="#+id/TextView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="List Of Devices"
android:textColor="#ff0000"
android:textSize="15sp" />
<ScrollView
android:id="#+id/scrollView1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ScrollView>
<ListView
android:id="#+id/lv_paired"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ListView>
</LinearLayout>
list_item_device.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingTop="5dp"
android:paddingBottom="5dp">
<Button
android:id="#+id/btn_pair"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:text="Pair"
android:textColor="#ff4444" />
<TextView
android:id="#+id/tv_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignTop="#+id/btn_pair"
android:layout_toLeftOf="#+id/btn_pair"
android:text="Galaxy Nexus"
android:textColor="#99cc00"
android:textSize="16sp" />
<TextView
android:id="#+id/tv_address"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/btn_pair"
android:layout_alignParentLeft="true"
android:layout_toLeftOf="#+id/btn_pair"
android:text="000000000"
android:textColor="#ffbd21" />
</RelativeLayout>
My Problems that not solved are
The app is not working when I add an onItemclicklistener to the list view.
bluetooth search result is filling with the same device name.
I cannot access the buttons after viewing pairing devices and
scanned devices(it seems like that the same layout is popping to screen).
Anyone please help me to solve these issues.
Thanks in advance.

You can just do like this -
mListView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Toast.makeText(getApplicationContext(), " ITEM CLICKED POSITION = "+String.valueOf(position), Toast.LENGTH_SHORT).show();
}
});

You can add OnItemClickListener like this
mListView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) { {
Toast.makeText(getApplicationContext(),String.valueOf(arg2), Toast.LENGTH_LONG).show();
}
});`

look at this code it contain how you set the list view listener with detect the clicked row and getting sub view in that row
ListView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
View row= adapter.getView(position, view, parent);
CheckBox box=(CheckBox) row.findViewById(R.id.checkBox1);
box.performClick();
}
});
adapter is your list view adapter
hope it help

Transition to a black screen

I believe I have my code set up correctly but when I try to debug it, after it transitions from the splash screen it just goes right to a black screen. I know I imported the layout correctly but it still goes black.
This is the code for the splash screen
package com.example.equate.jones;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.MenuItem;
import android.support.v4.app.NavUtils;
public class EJ_Splash extends Activity {
protected boolean _active = true;
protected int _splashTime = 3000;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_ej__splash);
// thread for displaying the SplashScreen
Thread splashTread = new Thread() {
#Override
public void run() {
try {
synchronized(this){
wait(4000);
}
}
catch(InterruptedException e) {
// do nothing
} {
finish();
Intent i = new Intent(getApplicationContext(),EJ_Board.class);
startActivity(i);
}
}
};
splashTread.start();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_ej__splash, menu);
return true;
}
}
This is the code for the screen it is supposed to transition to.
package com.example.equate.jones;
import android.app.Activity;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
public class EJ_Board extends Activity {
private ImageView button1;
final MediaPlayer mp = MediaPlayer.create(this, R.raw.warm);
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.ej_board);
button1=(ImageView)findViewById(R.id.imageView1);
button1.setOnClickListener(new View.OnClickListener()
{
public void onClick(View view)
{
mp.start();
}
});
}
}
This is the xml for EJ_Board
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ImageView
android:id="#+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_launcher" />
</LinearLayout>

I think your problem is with the ImageView. You need to add an image to your drawable folder, then change your android:src="#drawable/ic_launcher" to the name of the image you saved. This will give you the image you need for your button. Hope that helps
Edit:
For your splash screen, try something like this:
public class SplashActivity extends Activity {
private long splashDelay = 5000;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.splash);
TimerTask task = new TimerTask()
{
#Override
public void run() {
finish();
Intent homeIntent = new Intent().setClass(SplashActivity.this, HomeActivity.class);
startActivity(homeIntent);
}
};
Timer timer = new Timer();
timer.schedule(task, splashDelay);
}
}
Then in your home activity you can set your menu:
public class HomeActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.layout.menu, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
case R.id.locationButton:
Intent locationIntent = new Intent(this, LocationActivity.class);
startActivity(locationIntent);
return true;
case R.id.diningButton:
Intent diningIntent = new Intent(this, DiningActivity.class);
startActivity(diningIntent);
return true;
case R.id.topXXVButton:
Intent topIntent = new Intent(this, DiningActivity.class);
startActivity(topIntent);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
Try this:
public class SplashActivity extends Activity {
private long splashDelay = 5000;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.splash);
TimerTask task = new TimerTask()
{
#Override
public void run() {
finish();
Intent mainIntent = new Intent().setClass(EJ_Splash.this, EJ_Board.class);
startActivity(mainIntent);
}
};
Timer timer = new Timer();
timer.schedule(task, splashDelay);
}
}