I am a newbie at android studio and am trying to make a simple todolist app. I have a daily alarm set up using Alarm Manager but I would like the user to be able to change the timing that this daily alarm goes off in the settings page. Therefore, I need a timepicker in preferencescreen and I have learnt that you can do this using custom DialogPreferences.
I have tried to follow this tutorial http://www.infiniteimprob.com/blog/custom-preferences/ but it shows this exceptioncom.example.todolist.TimePickerPreference cannot be cast to androidx.preference.Preference I have a feeling that this is due to compatibility issues because I used the androidx library for my other imports. I think that this will be solved if I were to import the androidx.preference.DialogPreference instead of android.preference.DialogPreference; Can someone tell me how I can go about this change? I have read this answer Difference between DialogPreference before and after AndroidX but I still do not really know how to execute it.
This is my timepickerpreference class as followed on the website:
import android.content.res.TypedArray;
import android.os.Build;
import android.preference.DialogPreference;
import android.util.AttributeSet;
import android.view.View;
import android.widget.TextView;
import android.widget.TimePicker;
public class TimePickerPreference extends DialogPreference {
private static final int DEFAULT_TIME = 0;
private TimePicker mTimePicker;
private int currentTime;
public TimePickerPreference(Context context, AttributeSet attrs){
super(context, attrs);
setDialogLayoutResource(R.layout.timepickerpreferencelayout);
setPositiveButtonText("ok");
setNegativeButtonText("cancel");
}
private static int getTime(int hour, int minute){
return hour*60*60*1000 + minute*60*1000;
}
private static int getHour(int value){
return (int)(value / (60*60*1000));
}
private static int getMinute(int value){
return (int)(value % (60*60*1000));
}
#Override
protected View onCreateDialogView() {
View view = super.onCreateDialogView();
mTimePicker = (TimePicker) view.findViewById(R.id.timePicker);
mTimePicker.setIs24HourView(true);
if (Build.VERSION.SDK_INT >= 23)
{
mTimePicker.setHour(getHour(currentTime));
mTimePicker.setMinute(getMinute(currentTime));
}
else
{
mTimePicker.setCurrentHour(getHour(currentTime));
mTimePicker.setCurrentMinute(getMinute(currentTime));
}
mTimePicker.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener()
{
#Override
public void onTimeChanged(TimePicker timePicker, int hour, int minute)
{
TimePickerPreference.this.currentTime = getTime(hour, minute);
}
});
TextView messageTextView = (TextView) view.findViewById(R.id.messageTextView);
if (getDialogMessage() == null || getDialogMessage().toString().trim().length() == 0)
messageTextView.setVisibility(View.GONE);
messageTextView.setText(getDialogMessage());
return view;
}
#Override
protected Object onGetDefaultValue(TypedArray a, int index)
{
return a.getInt(index, DEFAULT_TIME);
}
#Override
protected void onSetInitialValue(boolean restorePersistedValue, Object defaultValue)
{
if(restorePersistedValue)
{
currentTime = this.getPersistedInt((int) (defaultValue == null ? DEFAULT_TIME : defaultValue));
}
else
{
currentTime = (int) defaultValue;
if (shouldPersist())
persistInt(currentTime);
}
}
#Override
protected void onDialogClosed(boolean positiveResult)
{
if (positiveResult)
persistInt(currentTime);
}
}
I am actually searching for an android clock view whose time can be set in the activity and then it will start working from that setted time.I saw the TextClock view but it seemed that only the timezone can be set.Can anyone help me?
Use this class, might help you, You can change date time whatever you want
import android.content.Context;
import android.database.ContentObserver;
import android.os.Handler;
import android.os.SystemClock;
import android.provider.Settings;
import android.support.v7.widget.AppCompatTextView;
import android.text.format.DateFormat;
import android.util.AttributeSet;
import java.util.Calendar;
public class DigitalClock extends AppCompatTextView {
Calendar mCalendar;
private FormatChangeObserver mFormatChangeObserver;
private Runnable mTicker;
private Handler mHandler;
private boolean mTickerStopped = false;
String mFormat;
public DigitalClock(Context context) {
super(context);
initClock();
}
public DigitalClock(Context context, AttributeSet attrs) {
super(context, attrs);
initClock();
}
private void initClock() {
if (mCalendar == null) {
mCalendar = Calendar.getInstance();
}
}
#Override
protected void onAttachedToWindow() {
mTickerStopped = false;
super.onAttachedToWindow();
mFormatChangeObserver = new FormatChangeObserver();
getContext().getContentResolver().registerContentObserver(
Settings.System.CONTENT_URI, true, mFormatChangeObserver);
setFormat();
mHandler = new Handler();
mTicker = new Runnable() {
public void run() {
if (mTickerStopped) return;
mCalendar.setTimeInMillis(System.currentTimeMillis());
setText(DateFormat.format(mFormat, mCalendar));
invalidate();
long now = SystemClock.uptimeMillis();
long next = now + (1000 - now % 1000);
mHandler.postAtTime(mTicker, next);
}
};
mTicker.run();
}
#Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
mTickerStopped = true;
getContext().getContentResolver().unregisterContentObserver(
mFormatChangeObserver);
}
private void setFormat() {
mFormat = "dd MMM yy , hh:mm ss a ";
}
private class FormatChangeObserver extends ContentObserver {
public FormatChangeObserver() {
super(new Handler());
}
#Override
public void onChange(boolean selfChange) {
setFormat();
}
}
#Override
public CharSequence getAccessibilityClassName() {
//noinspection deprecation
return DigitalClock.class.getName();
}
}
I have a digital clock on an activity in my app and I want to display only hours and minutes on it and don't want to display seconds.
import android.content.Context;
import android.database.ContentObserver;
import android.os.Handler;
import android.os.SystemClock;
import android.provider.Settings;
import android.text.format.DateFormat;
import android.util.AttributeSet;
import android.widget.TextView;
import java.util.Calendar;
public class DigitalClock extends TextView {
Calendar mCalendar;
private final static String m24 = "k:mm";
private FormatChangeObserver mFormatChangeObserver;
private Runnable mTicker;
private Handler mHandler;
private boolean mTickerStopped = false;
String mFormat;
public DigitalClock(Context context) {
super(context);
initClock(context);
}
public DigitalClock(Context context, AttributeSet attrs) {
super(context, attrs);
initClock(context);
}
private void initClock(Context context) {
if (mCalendar == null) {
mCalendar = Calendar.getInstance();
}
mFormatChangeObserver = new FormatChangeObserver();
getContext().getContentResolver().registerContentObserver(
Settings.System.CONTENT_URI, true, mFormatChangeObserver);
setFormat();
}
#Override
protected void onAttachedToWindow() {
mTickerStopped = false;
super.onAttachedToWindow();
mHandler = new Handler();
/**
* requests a tick on the next hard-second boundary
*/
mTicker = new Runnable() {
public void run() {
if (mTickerStopped) return;
mCalendar.setTimeInMillis(System.currentTimeMillis());
setText(DateFormat.format(mFormat, mCalendar));
invalidate();
long now = SystemClock.uptimeMillis();
long next = now + (1000 - now % 1000);
mHandler.postAtTime(mTicker, next);
}
};
mTicker.run();
}
#Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
mTickerStopped = true;
}
private void setFormat() {
mFormat = m24;
}
private class FormatChangeObserver extends ContentObserver {
public FormatChangeObserver() {
super(new Handler());
}
#Override
public void onChange(boolean selfChange) {
setFormat();
}
}
}
You can use this custom view. This works with gingerbread also. Change the time format to your liking.(m24)
The system sends a broadcast event at the exact beginning of every minutes based on system clock. The most reliable way is to do it like this :
BroadcastReceiver _broadcastReceiver;
private final SimpleDateFormat _sdfWatchTime = new SimpleDateFormat("HH:mm");
private TextView _tvTime;
#Override
public void onStart() {
super.onStart();
_broadcastReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context ctx, Intent intent) {
if (intent.getAction().compareTo(Intent.ACTION_TIME_TICK) == 0)
_tvTime.setText(_sdfWatchTime.format(new Date()));
}
};
registerReceiver(_broadcastReceiver, new IntentFilter(Intent.ACTION_TIME_TICK));
}
#Override
public void onStop() {
super.onStop();
if (_broadcastReceiver != null)
unregisterReceiver(_broadcastReceiver);
}
Don't forget however to initialize your TextView beforehand (to current system time) since it is likely you will pop your UI in the middle of a minute and the TextView won't be updated until the next minute happens.
I want to develop a simple stop watch logic in android.
On clicking a list view the timer should start and on clicking the button the timer should stop. Can anyone please guide me. Any sample code will be of great help
Use the Stopwatch Class (For higher precision use System.nanoTime())
Add a Start() event and Stop() event on Button Presses. You'll need to update the UI so use a Thread/Handler Combination.
This should get you started.
EDIT: Added Code. (Nice Exercise! :) )
Use the Refresh_Rate to configure how often your UI is updated.
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class Main extends Activity implements OnClickListener{
final int MSG_START_TIMER = 0;
final int MSG_STOP_TIMER = 1;
final int MSG_UPDATE_TIMER = 2;
Stopwatch timer = new Stopwatch();
final int REFRESH_RATE = 100;
Handler mHandler = new Handler()
{
#Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
switch (msg.what) {
case MSG_START_TIMER:
timer.start(); //start timer
mHandler.sendEmptyMessage(MSG_UPDATE_TIMER);
break;
case MSG_UPDATE_TIMER:
tvTextView.setText(""+ timer.getElapsedTime());
mHandler.sendEmptyMessageDelayed(MSG_UPDATE_TIMER,REFRESH_RATE); //text view is updated every second,
break; //though the timer is still running
case MSG_STOP_TIMER:
mHandler.removeMessages(MSG_UPDATE_TIMER); // no more updates.
timer.stop();//stop timer
tvTextView.setText(""+ timer.getElapsedTime());
break;
default:
break;
}
}
};
TextView tvTextView;
Button btnStart,btnStop;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tvTextView = (TextView)findViewById(R.id.TextView01);
btnStart = (Button)findViewById(R.id.Button01);
btnStop= (Button)findViewById(R.id.Button02);
btnStart.setOnClickListener(this);
btnStop.setOnClickListener(this);
}
public void onClick(View v) {
if(btnStart == v)
{
mHandler.sendEmptyMessage(MSG_START_TIMER);
}else
if(btnStop == v){
mHandler.sendEmptyMessage(MSG_STOP_TIMER);
}
}
}
As st0le gave an excellent example by using Stopwatch class. I modified this class a little and add a few methods to it.
/*
Copyright (c) 2005, Corey Goldberg
StopWatch.java is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
Modified: Bilal Rabbani bilalrabbani1#live.com (Nov 2013)
*/
package bilalrabbani1.at.live.com;
public class Stopwatch {
private long startTime = 0;
private boolean running = false;
private long currentTime = 0;
public void start() {
this.startTime = System.currentTimeMillis();
this.running = true;
}
public void stop() {
this.running = false;
}
public void pause() {
this.running = false;
currentTime = System.currentTimeMillis() - startTime;
}
public void resume() {
this.running = true;
this.startTime = System.currentTimeMillis() - currentTime;
}
//elaspsed time in milliseconds
public long getElapsedTimeMili() {
long elapsed = 0;
if (running) {
elapsed =((System.currentTimeMillis() - startTime)/100) % 1000 ;
}
return elapsed;
}
//elaspsed time in seconds
public long getElapsedTimeSecs() {
long elapsed = 0;
if (running) {
elapsed = ((System.currentTimeMillis() - startTime) / 1000) % 60;
}
return elapsed;
}
//elaspsed time in minutes
public long getElapsedTimeMin() {
long elapsed = 0;
if (running) {
elapsed = (((System.currentTimeMillis() - startTime) / 1000) / 60 ) % 60;
}
return elapsed;
}
//elaspsed time in hours
public long getElapsedTimeHour() {
long elapsed = 0;
if (running) {
elapsed = ((((System.currentTimeMillis() - startTime) / 1000) / 60 ) / 60);
}
return elapsed;
}
public String toString() {
return getElapsedTimeHour() + ":" + getElapsedTimeMin() + ":"
+ getElapsedTimeSecs() + "." + getElapsedTimeMili();
}
}
Regards
Instead of using listview you simply use a text view for timer and 3 buttons for stop start and reset . Using these you can make the java code accordingly
Good example, just in case if someone wants that layout file to go with this (pretty simple though).
<RelativeLayout 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:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/hello_world" />
<EditText
android:id="#+id/TextView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/textView1"
android:layout_below="#+id/textView1"
android:layout_marginLeft="18dp"
android:layout_marginTop="49dp"
android:ems="10" >
<requestFocus />
</EditText>
<Button
android:id="#+id/Button01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/TextView01"
android:layout_marginTop="42dp"
android:layout_toRightOf="#+id/textView1"
android:text="Start" />
<Button
android:id="#+id/Button02"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/Button01"
android:layout_marginTop="14dp"
android:layout_toRightOf="#+id/textView1"
android:text="Stop" />
IntentService based, no non-SDK dependencies and on a single file:
import android.app.Activity;
import android.app.IntentService;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.content.LocalBroadcastManager;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;
public class Main extends Activity {
static final String BROADCAST_ACTION = "com.cirosantilli.android_cheat.intent_service_text_view.BROADCAST";
static final String EXTENDED_DATA_STATUS = "com.cirosantilli.android_cheat.intent_service_text_view.BROADCAST";
static final String TAG = "com.cirosantilli";
private int i = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
Log.d(TAG, "onCreate");
super.onCreate(savedInstanceState);
final LinearLayout linearLayout = new LinearLayout(this);
Button button;
final Intent intent = new Intent(Main.this, MyService.class);
button = new Button(this);
button.setText("start service");
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Log.d(TAG, "start button");
Main.this.startService(intent.putExtra(Main.EXTENDED_DATA_STATUS, Main.this.i));
}
});
linearLayout.addView(button);
button = new Button(this);
button.setText("stop service");
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Log.d(TAG, "stop button");
Main.this.stopService(intent);
}
});
linearLayout.addView(button);
final TextView textView = new TextView(this);
textView.setText(Integer.toString(i));
linearLayout.addView(textView);
this.setContentView(linearLayout);
LocalBroadcastManager.getInstance(this).registerReceiver(
new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
Main.this.i = intent.getIntExtra(Main.EXTENDED_DATA_STATUS, 0);
textView.setText(Integer.toString(Main.this.i));
}
}, new IntentFilter(Main.BROADCAST_ACTION)
);
}
public static class MyService extends IntentService {
private Handler mHandler;
private int i = 1;
private boolean done;
public MyService() {
super("MyService");
}
#Override
protected void onHandleIntent(Intent intent) {
Log.d(TAG, "onHandleIntent");
this.i = intent.getIntExtra(Main.EXTENDED_DATA_STATUS, 0);
this.done = false;
while(!done) {
Log.d(TAG, "while true");
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
LocalBroadcastManager.getInstance(this).sendBroadcast(
new Intent(Main.BROADCAST_ACTION)
.putExtra(Main.EXTENDED_DATA_STATUS, MyService.this.i));
this.i++;
}
}
#Override
public void onDestroy() {
Log.d(TAG, "onDestroy");
this.done = true;
super.onDestroy();
}
}
}
For low precision only. We could get increased precision by using System.currentTimeMillis inside onHandleIntent instead of using the integer value, and reducing the sleep time to reduce latency.
Tested on Android 22. Standard build boilerplate here.
I want my preference menu to have something to change the duration of a vibration.
There is no slider tag for prefs.xml, so what is the best way to do this?
I improved the link provided by Macarse, so that the value is saved only on ok button click, and so that you can use #string/... values in the XML file.
Here is the code:
/* The following code was written by Matthew Wiggins
* and is released under the APACHE 2.0 license
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Improvements :
* - save the value on positive button click, not on seekbar change
* - handle #string/... values in xml file
*/
package fr.atcm.carpooling.views.utils;
import android.app.AlertDialog;
import android.content.Context;
import android.os.Bundle;
import android.preference.DialogPreference;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.SeekBar;
import android.widget.TextView;
public class SeekBarPreference extends DialogPreference implements SeekBar.OnSeekBarChangeListener, OnClickListener
{
// ------------------------------------------------------------------------------------------
// Private attributes :
private static final String androidns="http://schemas.android.com/apk/res/android";
private SeekBar mSeekBar;
private TextView mSplashText,mValueText;
private Context mContext;
private String mDialogMessage, mSuffix;
private int mDefault, mMax, mValue = 0;
// ------------------------------------------------------------------------------------------
// ------------------------------------------------------------------------------------------
// Constructor :
public SeekBarPreference(Context context, AttributeSet attrs) {
super(context,attrs);
mContext = context;
// Get string value for dialogMessage :
int mDialogMessageId = attrs.getAttributeResourceValue(androidns, "dialogMessage", 0);
if(mDialogMessageId == 0) mDialogMessage = attrs.getAttributeValue(androidns, "dialogMessage");
else mDialogMessage = mContext.getString(mDialogMessageId);
// Get string value for suffix (text attribute in xml file) :
int mSuffixId = attrs.getAttributeResourceValue(androidns, "text", 0);
if(mSuffixId == 0) mSuffix = attrs.getAttributeValue(androidns, "text");
else mSuffix = mContext.getString(mSuffixId);
// Get default and max seekbar values :
mDefault = attrs.getAttributeIntValue(androidns, "defaultValue", 0);
mMax = attrs.getAttributeIntValue(androidns, "max", 100);
}
// ------------------------------------------------------------------------------------------
// ------------------------------------------------------------------------------------------
// DialogPreference methods :
#Override
protected View onCreateDialogView() {
LinearLayout.LayoutParams params;
LinearLayout layout = new LinearLayout(mContext);
layout.setOrientation(LinearLayout.VERTICAL);
layout.setPadding(6,6,6,6);
mSplashText = new TextView(mContext);
mSplashText.setPadding(30, 10, 30, 10);
if (mDialogMessage != null)
mSplashText.setText(mDialogMessage);
layout.addView(mSplashText);
mValueText = new TextView(mContext);
mValueText.setGravity(Gravity.CENTER_HORIZONTAL);
mValueText.setTextSize(32);
params = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.FILL_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
layout.addView(mValueText, params);
mSeekBar = new SeekBar(mContext);
mSeekBar.setOnSeekBarChangeListener(this);
layout.addView(mSeekBar, new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT));
if (shouldPersist())
mValue = getPersistedInt(mDefault);
mSeekBar.setMax(mMax);
mSeekBar.setProgress(mValue);
return layout;
}
#Override
protected void onBindDialogView(View v) {
super.onBindDialogView(v);
mSeekBar.setMax(mMax);
mSeekBar.setProgress(mValue);
}
#Override
protected void onSetInitialValue(boolean restore, Object defaultValue)
{
super.onSetInitialValue(restore, defaultValue);
if (restore)
mValue = shouldPersist() ? getPersistedInt(mDefault) : 0;
else
mValue = (Integer)defaultValue;
}
// ------------------------------------------------------------------------------------------
// ------------------------------------------------------------------------------------------
// OnSeekBarChangeListener methods :
#Override
public void onProgressChanged(SeekBar seek, int value, boolean fromTouch)
{
String t = String.valueOf(value);
mValueText.setText(mSuffix == null ? t : t.concat(" " + mSuffix));
}
#Override
public void onStartTrackingTouch(SeekBar seek) {}
#Override
public void onStopTrackingTouch(SeekBar seek) {}
public void setMax(int max) { mMax = max; }
public int getMax() { return mMax; }
public void setProgress(int progress) {
mValue = progress;
if (mSeekBar != null)
mSeekBar.setProgress(progress);
}
public int getProgress() { return mValue; }
// ------------------------------------------------------------------------------------------
// ------------------------------------------------------------------------------------------
// Set the positive button listener and onClick action :
#Override
public void showDialog(Bundle state) {
super.showDialog(state);
Button positiveButton = ((AlertDialog) getDialog()).getButton(AlertDialog.BUTTON_POSITIVE);
positiveButton.setOnClickListener(this);
}
#Override
public void onClick(View v) {
if (shouldPersist()) {
mValue = mSeekBar.getProgress();
persistInt(mSeekBar.getProgress());
callChangeListener(Integer.valueOf(mSeekBar.getProgress()));
}
((AlertDialog) getDialog()).dismiss();
}
// ------------------------------------------------------------------------------------------
}
EDIT :
Here is a screenshot :
EDIT : on arlomedia's demand, here are all the needed pieces of code (I just recreated a new projet, it is perfectly working. I corrected some bugs in SeekBarPreference class, so don't forget to re-copy/paste it) :
MainActivity :
package fr.at.testsliderpref;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onMenuItemSelected(int featureId, MenuItem item) {
switch(item.getItemId()) {
case R.id.menu_settings : {
startActivity(new Intent(this, SettingsActivity.class));
break;
}
}
return true;
}
}
SettingsActivity :
package fr.at.testsliderpref;
import android.content.SharedPreferences;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.os.Bundle;
import android.preference.PreferenceActivity;
import android.preference.PreferenceFragment;
import android.preference.PreferenceManager;
import fr.at.testsliderpref.utils.SeekBarPreference;
public class SettingsActivity extends PreferenceActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
// Call super :
super.onCreate(savedInstanceState);
// Set the activity's fragment :
getFragmentManager().beginTransaction().replace(android.R.id.content, new SettingsFragment()).commit();
}
public static class SettingsFragment extends PreferenceFragment implements OnSharedPreferenceChangeListener {
private SeekBarPreference _seekBarPref;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Load the preferences from an XML resource
addPreferencesFromResource(R.xml.activity_settings);
// Get widgets :
_seekBarPref = (SeekBarPreference) this.findPreference("SEEKBAR_VALUE");
// Set listener :
getPreferenceScreen().getSharedPreferences().registerOnSharedPreferenceChangeListener(this);
// Set seekbar summary :
int radius = PreferenceManager.getDefaultSharedPreferences(this.getActivity()).getInt("SEEKBAR_VALUE", 50);
_seekBarPref.setSummary(this.getString(R.string.settings_summary).replace("$1", ""+radius));
}
#Override
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
// Set seekbar summary :
int radius = PreferenceManager.getDefaultSharedPreferences(this.getActivity()).getInt("SEEKBAR_VALUE", 50);
_seekBarPref.setSummary(this.getString(R.string.settings_summary).replace("$1", ""+radius));
}
}
}
layout > activity_main.xml :
<RelativeLayout 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:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/textview_text" />
</RelativeLayout>
menu > main.xml :
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
<item
android:id="#+id/menu_settings"
android:title="#string/menu_settings"
android:icon="#android:drawable/ic_menu_preferences"/>
</menu>
xml > activity_settings.xml :
<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" >
<fr.at.testsliderpref.utils.SeekBarPreference
android:defaultValue="50"
android:dialogMessage="#string/settings_dialog_message"
android:key="SEEKBAR_VALUE"
android:max="100"
android:summary="#string/settings_summary"
android:text="#string/settings_unit"
android:title="#string/settings_title" />
</PreferenceScreen>
values > strings.xml :
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">TestSliderPref</string>
<string name="textview_text">SeekBarPreference test</string>
<string name="menu_settings">Settings</string>
<string name="settings_dialog_message">Here comes a message</string>
<string name="settings_summary">Current value is $1</string>
<string name="settings_unit">Km</string>
<string name="settings_title">Here comes the title</string>
</resources>
Don't forget to add your SettingsActivity to the manifest, and it should be OK.
You could create your own Preference class that extends DialogPreference and shows a SeekBar as the dialog view.
An easy way to achieve this is to add an empty preference to your preferences.xml which uses a layout including a seekbar.
In your preferences.xml add
<Preference android:layout="#layout/sliderlayout" />
under layouts add the sliderlayout
<?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" >
<SeekBar
android:id="#+id/seekBar1"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
If you already moved to androidX you can simply use androidx.preference.SeekBarPreference. Documentation here and here
Define it in XML like this:
<SeekBarPreference
app:defaultValue="8"
app:key="COUNT_SPEED"
app:title="Fast count speed"
/>
Note: Now in Android Studio (my current version is 3.2.1) auto-suggestions doesn't work for androidx.preference.PreferenceScreen in prefs.xml, but don't worry inflating settings from xml with setPreferencesFromResource() works fine. All needed attributes names and component references you can find here.
This is good Slider Preference component - Android Slider Preference Library
https://github.com/jayschwa/AndroidSliderPreference
One more implementation of this.
All Credit goes to Tim Autin.
I wanted to have the values displayed loaded from XML Arrays
It looks like this
Code - this now extends ListPreference
import android.app.AlertDialog;
import android.content.Context;
import android.os.Bundle;
import android.preference.ListPreference;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.SeekBar;
import android.widget.TextView;
public class SeekBarListPreference extends ListPreference implements SeekBar.OnSeekBarChangeListener, View.OnClickListener {
// ------------------------------------------------------------------------------------------
// Private attributes :
private static final String androidns = "http://schemas.android.com/apk/res/android";
private SeekBar mSeekBar;
private TextView mSplashText, mValueText;
private Context mContext;
private String mDialogMessage;
// ------------------------------------------------------------------------------------------
public SeekBarListPreference(Context context, AttributeSet attrs) {
super(context, attrs);
mContext = context;
// Get string value for dialogMessage :
int mDialogMessageId = attrs.getAttributeResourceValue(androidns, "dialogMessage", 0);
if (mDialogMessageId == 0)
mDialogMessage = attrs.getAttributeValue(androidns, "dialogMessage");
else mDialogMessage = mContext.getString(mDialogMessageId);
}
// ------------------------------------------------------------------------------------------
// DialogPreference methods :
#Override
protected View onCreateDialogView() {
LinearLayout.LayoutParams params;
LinearLayout layout = new LinearLayout(mContext);
layout.setOrientation(LinearLayout.VERTICAL);
layout.setPadding(6, 6, 6, 6);
mSplashText = new TextView(mContext);
mSplashText.setPadding(30, 10, 30, 10);
if (mDialogMessage != null)
mSplashText.setText(mDialogMessage);
layout.addView(mSplashText);
mValueText = new TextView(mContext);
mValueText.setGravity(Gravity.CENTER_HORIZONTAL);
mValueText.setTextSize(32);
params = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
layout.addView(mValueText, params);
mSeekBar = new SeekBar(mContext);
mSeekBar.setOnSeekBarChangeListener(this);
layout.addView(mSeekBar, new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT));
setProgressBarValue();
return layout;
}
#Override
protected void onPrepareDialogBuilder(AlertDialog.Builder builder) {
// do not call super
}
private void setProgressBarValue() {
String mValue = null;
if (shouldPersist()) {
mValue = getValue();
}
final int max = this.getEntries().length - 1;
mSeekBar.setMax(max);
mSeekBar.setProgress(this.findIndexOfValue(mValue));
}
#Override
protected void onBindDialogView(View v) {
super.onBindDialogView(v);
setProgressBarValue();
}
#Override
public void onProgressChanged(SeekBar seek, int value, boolean fromTouch) {
final CharSequence textToDisplay = getEntryFromValue(value);
mValueText.setText(textToDisplay);
}
private CharSequence getEntryFromValue(int value) {
CharSequence[] entries = getEntries();
return value >= 0 && entries != null ? entries[value] : null;
}
#Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
#Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
#Override
public void showDialog(Bundle state) {
super.showDialog(state);
Button positiveButton = ((AlertDialog) getDialog()).getButton(AlertDialog.BUTTON_POSITIVE);
positiveButton.setOnClickListener(this);
}
#Override
public void onClick(View v) {
if (shouldPersist()) {
final int progressChoice = mSeekBar.getProgress();
setValueIndex(progressChoice);
}
getDialog().dismiss();
}
}
The usage in the preferences file is now
<com.yourfullpackage.SeekBarListPreference
android:defaultValue="0"
android:dialogMessage="#string/time_limit_pref"
android:entries="#array/timeListArray"
android:entryValues="#array/timeListValues"
android:key="time"
android:summary="Select time limit"
android:title="Time"
/>
And the arrays
<string-array name="timeListArray">
<item>10 Seconds</item>
<item>30 Seconds</item>
<item>1 Minute</item>
<item>2 Minutes</item>
<item>Unlimited</item>
</string-array>
<!--This is going to be in seconds-->
<string-array name="timeListValues">
<item>10</item>
<item>30</item>
<item>60</item>
<item>120</item>
<item>0</item>
</string-array>
As a bonus if you already have ListPreferences, you don't need to add anything extra to display the summary as the current value. So this works just fine
#Override
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
SetSummaryForPreferenceKey(key);
}
private void SetSummaryForPreferenceKey(String key) {
Preference preference = findPreference(key);
// This works with our new SeekBarPreference
if (preference instanceof ListPreference) {
ListPreference listPref = (ListPreference) preference;
listPref.setSummary(listPref.getEntry());
}
}
I've made a slight improvement on the code provided in the answer by Tim. This simply makes live adjustments to the output value as the user moves the slider, rather than requiring the user to click the "Ok" button for the changes to be made.
This is useful for things like a Music Volume slider, where the user should be able to hear the adjustment in volume as it's being made.
If the user clicks "OK" the new value is maintained. If the user clicks "Cancel" then the original pre-adjustment value is restored.
Thanks and credit should go to Tim, I just added the extra onClick listener and pushed the value updating into the onChange listener.
package fr.atcm.carpooling.views.utils;
/* The following code was written by Matthew Wiggins
* and is released under the APACHE 2.0 license
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Improvements :
* - save the value on positive button click and/or seekbar change
* - restore pre-adjustment value on negative button click
*/
import android.R;
import android.app.AlertDialog;
import android.content.Context;
import android.os.Bundle;
import android.preference.DialogPreference;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.SeekBar;
import android.widget.TextView;
public class SeekBarPreference extends DialogPreference implements
SeekBar.OnSeekBarChangeListener, OnClickListener {
// ------------------------------------------------------------------------------------------
// Private attributes :
private static final String androidns = "http://schemas.android.com/apk/res/android";
private SeekBar mSeekBar;
private TextView mSplashText, mValueText;
private Context mContext;
private String mDialogMessage, mSuffix;
private int mDefault, mMax, mValue, mOrig = 0;
// ------------------------------------------------------------------------------------------
// ------------------------------------------------------------------------------------------
// Constructor :
public SeekBarPreference(Context context, AttributeSet attrs) {
super(context, attrs);
mContext = context;
// Get string value for dialogMessage :
int mDialogMessageId = attrs.getAttributeResourceValue(androidns,
"dialogMessage", 0);
if (mDialogMessageId == 0)
mDialogMessage = attrs
.getAttributeValue(androidns, "dialogMessage");
else
mDialogMessage = mContext.getString(mDialogMessageId);
// Get string value for suffix (text attribute in xml file) :
int mSuffixId = attrs.getAttributeResourceValue(androidns, "text", 0);
if (mSuffixId == 0)
mSuffix = attrs.getAttributeValue(androidns, "text");
else
mSuffix = mContext.getString(mSuffixId);
// Get default and max seekbar values :
mDefault = attrs.getAttributeIntValue(androidns, "defaultValue", 0);
mMax = attrs.getAttributeIntValue(androidns, "max", 100);
}
// ------------------------------------------------------------------------------------------
// ------------------------------------------------------------------------------------------
// DialogPreference methods :
#Override
protected View onCreateDialogView() {
LinearLayout.LayoutParams params;
LinearLayout layout = new LinearLayout(mContext);
layout.setOrientation(LinearLayout.VERTICAL);
layout.setPadding(6, 6, 6, 6);
mSplashText = new TextView(mContext);
mSplashText.setPadding(30, 10, 30, 10);
if (mDialogMessage != null)
mSplashText.setText(mDialogMessage);
layout.addView(mSplashText);
mValueText = new TextView(mContext);
mValueText.setGravity(Gravity.CENTER_HORIZONTAL);
mValueText.setTextSize(32);
params = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.FILL_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
layout.addView(mValueText, params);
mSeekBar = new SeekBar(mContext);
mSeekBar.setOnSeekBarChangeListener(this);
layout.addView(mSeekBar, new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.FILL_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT));
if (shouldPersist())
mValue = getPersistedInt(mDefault);
mSeekBar.setMax(mMax);
mSeekBar.setProgress(mValue);
return layout;
}
#Override
protected void onBindDialogView(View v) {
super.onBindDialogView(v);
mSeekBar.setMax(mMax);
mSeekBar.setProgress(mValue);
}
#Override
protected void onSetInitialValue(boolean restore, Object defaultValue) {
super.onSetInitialValue(restore, defaultValue);
// Set adjustable value
if (restore)
mValue = shouldPersist() ? getPersistedInt(mDefault) : 0;
else
mValue = (Integer) defaultValue;
// Set original pre-adjustment value
mOrig = mValue;
}
// ------------------------------------------------------------------------------------------
// ------------------------------------------------------------------------------------------
// OnSeekBarChangeListener methods :
#Override
public void onProgressChanged(SeekBar seek, int value, boolean fromTouch) {
String t = String.valueOf(value);
mValueText.setText(mSuffix == null ? t : t.concat(" " + mSuffix));
if (shouldPersist()) {
mValue = mSeekBar.getProgress();
persistInt(mSeekBar.getProgress());
callChangeListener(Integer.valueOf(mSeekBar.getProgress()));
}
}
#Override
public void onStartTrackingTouch(SeekBar seek) {
}
#Override
public void onStopTrackingTouch(SeekBar seek) {
}
public void setMax(int max) {
mMax = max;
}
public int getMax() {
return mMax;
}
public void setProgress(int progress) {
mValue = progress;
if (mSeekBar != null)
mSeekBar.setProgress(progress);
}
public int getProgress() {
return mValue;
}
// ------------------------------------------------------------------------------------------
// ------------------------------------------------------------------------------------------
// Set the positive button listener and onClick action :
#Override
public void showDialog(Bundle state) {
super.showDialog(state);
Button positiveButton = ((AlertDialog) getDialog())
.getButton(AlertDialog.BUTTON_POSITIVE);
Button negativeButton = ((AlertDialog) getDialog())
.getButton(AlertDialog.BUTTON_NEGATIVE);
positiveButton.setOnClickListener(cListenPos);
negativeButton.setOnClickListener(cListenNeg);
}
View.OnClickListener cListenPos = new View.OnClickListener() {
public void onClick(View v) {
if (shouldPersist()) {
mValue = mSeekBar.getProgress();
mOrig = mSeekBar.getProgress();
persistInt(mSeekBar.getProgress());
callChangeListener(Integer.valueOf(mSeekBar.getProgress()));
}
((AlertDialog) getDialog()).dismiss();
}
};
View.OnClickListener cListenNeg = new View.OnClickListener() {
public void onClick(View v) {
if (shouldPersist()) {
mValue = mOrig;
persistInt(mOrig);
callChangeListener(Integer.valueOf(mOrig));
}
((AlertDialog) getDialog()).dismiss();
}
};
#Override
public void onClick(View v) {}
// ------------------------------------------------------------------------------------------
}
One small improvement of Tim's answer and its derivates:
protected void onBindDialogView(View v) {
super.onBindDialogView(v);
mSeekBar.setMax(mMax);
mSeekBar.setProgress(mValue);
String t = String.valueOf(mValue);
mValueText.setText(mSuffix == null ? t : t.concat(" " + mSuffix));
}
It will populate current value at start which is otherwise empty until you actually slide the slider.