Develop Reference

Android timer,Broadcast Receiver,

Developing a timer application,
Have 4 buttons
start--Will start the timer
stop-- will stop timer
pause--will pause timer
lap time--will calculate lap time.
when button click it s working Good.
Now i am Modify the application like timer should start when phone is connected to charger and pause when phone is disconnected from charger.
The timer is starting fine when connected to the charger,
but during discharging the stop timer is not stopping at the accurate time it will be misplaced with some other time.i.e delay in minutes and seconds.
How to make the timer pause and show correct timer when disconnected from the charger...?
MainActivity.java
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.BatteryManager;
import android.os.Handler;
import android.os.SystemClock;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
public class MainActivity extends Activity {
private static final String TAG ="Main Activity";
TextView textView;
Button start, pause, reset, lap;
long MillisecondTime, StartTime, TimeBuff, UpdateTime = 0L;
Handler handlerr;
int Seconds, Minutes, MilliSeconds;
ListView listView;
String[] ListElements = new String[]{};
List<String> ListElementsArrayList;
ArrayAdapter<String> adapter;
TextView textview;
Button button;
IntentFilter intentfilter;
int deviceStatus;
String currentBatteryStatus = "Battery Info";
int batteryLevel;
Handler handler;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textview = (TextView) findViewById(R.id.textViewBatteryStatus);
intentfilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
MainActivity.this.registerReceiver(broadcastreceiver, intentfilter);
textView = (TextView)findViewById(R.id.textView);
start = (Button)findViewById(R.id.button);
pause = (Button)findViewById(R.id.button2);
reset = (Button)findViewById(R.id.button3);
lap = (Button)findViewById(R.id.button4) ;
listView = (ListView)findViewById(R.id.listview1);
handler = new Handler() ;
ListElementsArrayList = new ArrayList<String>(Arrays.asList(ListElements));
adapter = new ArrayAdapter<String>(MainActivity.this,
android.R.layout.simple_list_item_1,
ListElementsArrayList
);
listView.setAdapter(adapter);
start.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
StartTime = SystemClock.uptimeMillis();
handler.postDelayed(runnable, 0);
reset.setEnabled(false);
}
});
pause.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
TimeBuff += MillisecondTime;
handler.removeCallbacks(runnable);
reset.setEnabled(true);
}
});
reset.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
MillisecondTime = 0L ;
StartTime = 0L ;
TimeBuff = 0L ;
UpdateTime = 0L ;
Seconds = 0 ;
Minutes = 0 ;
MilliSeconds = 0 ;
textView.setText("00:00:00");
ListElementsArrayList.clear();
adapter.notifyDataSetChanged();
}
});
lap.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
ListElementsArrayList.add(textView.getText().toString());
adapter.notifyDataSetChanged();
}
});
}
public Runnable runnable = new Runnable() {
public void run() {
MillisecondTime = SystemClock.uptimeMillis() - StartTime;
UpdateTime = TimeBuff + MillisecondTime;
Seconds = (int) (UpdateTime / 1000);
Minutes = Seconds / 60;
Seconds = Seconds % 60;
MilliSeconds = (int) (UpdateTime % 1000);
textView.setText("" + Minutes + ":"
+ String.format("%02d", Seconds) + ":"
+ String.format("%03d", MilliSeconds));
handler.postDelayed(this, 0);
}
};
// Broadcasts receiver//
private BroadcastReceiver broadcastreceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
deviceStatus = intent.getIntExtra(BatteryManager.EXTRA_STATUS,-1);
int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1);
int batteryLevel=(int)(((float)level / (float)scale) * 100.0f);
if(deviceStatus == BatteryManager.BATTERY_STATUS_CHARGING){
StartTime = SystemClock.uptimeMillis();
handler.postDelayed(runnable, 0);
reset.setEnabled(false);
textview.setText(currentBatteryStatus+" = Charging at "+batteryLevel+" %");
}
if(deviceStatus == BatteryManager.BATTERY_STATUS_DISCHARGING){
textview.setText(currentBatteryStatus+" = Discharging at "+batteryLevel+" %");
}
if (deviceStatus == BatteryManager.BATTERY_STATUS_FULL){
textview.setText(currentBatteryStatus+"= Battery Full at "+batteryLevel+" %");
}
if(deviceStatus == BatteryManager.BATTERY_STATUS_UNKNOWN){
textview.setText(currentBatteryStatus+" = Unknown at "+batteryLevel+" %");
}
if (deviceStatus == BatteryManager.BATTERY_STATUS_NOT_CHARGING){
TimeBuff += MillisecondTime;
handler.removeCallbacks(runnable);
reset.setEnabled(true);
textview.setText(currentBatteryStatus+" = Not Charging at "+batteryLevel+" %");
}
}
};
}
activity_main.xml
<TextView
android:text="00:00:00"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/textView"
android:textSize="50dp"
android:textStyle="bold"
android:textColor="#009688"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
<Button
android:text="Start"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/textView"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="41dp"
android:id="#+id/button" />
<Button
android:text="Pause"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/button2"
android:layout_alignBaseline="#+id/button"
android:layout_alignBottom="#+id/button"
android:layout_centerHorizontal="true" />
<Button
android:text="Reset"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="#+id/button2"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:id="#+id/button3" />
<Button
android:text="Save Lap"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="24dp"
android:id="#+id/button4"
android:layout_below="#+id/button"
android:layout_centerHorizontal="true" />
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/button4"
android:layout_centerHorizontal="true"
android:layout_marginTop="12dp"
android:id="#+id/listview1"/>
<TextView
android:id="#+id/textViewBatteryStatus"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignEnd="#+id/button2"
android:layout_below="#+id/textView"
android:text="Current Battery Status"
android:textAppearance="?android:attr/textAppearanceLarge" />
Guidance in editing code will be helpful.

If you want to catch the Charger Connected and Disconnected events, then you should not use the BATTERY_STATUS_CHARGING and BATTERY_STATUS_DISCHARGING at the first place.You should listen for -
<receiver android:name=".YourPowerConnectionReceiver">
<intent-filter>
<action android:name="android.intent.action.ACTION_POWER_CONNECTED"/>
<action android:name="android.intent.action.ACTION_POWER_DISCONNECTED"/>
</intent-filter>
</receiver>
Thus you will get the broadcast only during charger connected and disconnected state.
Look here : https://developer.android.com/reference/android/content/Intent.html#ACTION_BATTERY_CHANGED

stopwatch - how to?

I have been trying to build a stopwatch in my app which starts counting on a start button click.I want it to count from seconds then minutes, then Hour but the problem is I can't count Hour but I can count milliseconds which I do not want. is that possible on start button click the app takes the current system time and on stop click just calculate and print the interval between starts and stop clicks?
Here is my activity class
package com.example.rimapps.stopwatch;
import android.os.Handler;
import android.os.SystemClock;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import java.text.SimpleDateFormat;
import java.util.Date;
public class MainActivity extends AppCompatActivity {
TextView textView;
Button but1,but2;
long MillisecondTIme,StarTime,TimeBuff,UpdateTime=0L;
Handler handler;
int MilliSeconds,Seconds,Minutes,Hour;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView=(TextView)findViewById(R.id.textView);
but1=(Button)findViewById(R.id.buttonstart);
but2=(Button)findViewById(R.id.buttonstop);
handler = new Handler();
but1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//Date d=new Date();
//SimpleDateFormat sdf=new SimpleDateFormat("hh:mm a");
//String currentDateTimeString=sdf.format(d);
//textView.setText(currentDateTimeString);
StarTime=SystemClock.uptimeMillis();
handler.postDelayed(runnable,0);
//reset.setEnabled(false);
}
});
but2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
MillisecondTIme=0L;
TimeBuff = 0L ;
UpdateTime = 0L ;
Seconds = 0 ;
Minutes = 0 ;
MilliSeconds = 0 ;
textView.setText("00:00:00");
}
});
}
public Runnable runnable=new Runnable() {
#Override
public void run() {
MillisecondTIme=SystemClock.uptimeMillis()-StarTime;
UpdateTime=TimeBuff+MillisecondTIme;
Seconds=(int)(UpdateTime/1000);
Minutes=Seconds/60;
Seconds=Seconds%60;
MilliSeconds=(int)(UpdateTime%1000);
textView.setText("" + Minutes + ":"
+ String.format("%02d", Seconds) + ":"
+ String.format("%03d", MilliSeconds));
handler.postDelayed(this,0);
}
};
}
here is my xml layout
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
tools:context="com.example.rimapps.stopwatch.MainActivity">
<TextView
android:text="00:00:00"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/textView"
android:textSize="50dp"
android:textStyle="bold"
android:textColor="#009688"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="33dp" />
<Button
android:text="Start"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="47dp"
android:id="#+id/buttonstart"
android:layout_below="#+id/textView"
android:layout_alignLeft="#+id/textView"
android:layout_alignStart="#+id/textView" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true">
<Button
android:text="Stop"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/buttonstop"
android:layout_marginRight="89dp"
android:layout_marginEnd="89dp"
android:layout_marginTop="140dp"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />
</RelativeLayout>
</RelativeLayout>

While I was learning a book I also had a stopwatch coding problem this is a sample of the code I use.
final Handler handler = new Handler();
handler.post(new Runnable() {
#Override
public void run() {
int hours=seconds/3600;
int minutes=(seconds%3600)/60;
int secs=seconds%60;
String time = String.format("%d:%02d:%02d",hours,minutes,secs);
timeView.setText(time);
if(running)
{
seconds++;
}
handler.postDelayed(this,1000);
}
});
also understand Handler class, handler will always run the code immediately(like every second forever) so you gotta add a boolean value that know if it is running then set it to your button like if start button is click you got to set the running to true. Handler will always run forever like the famous loop() method of arduino(it is running forever).

Use sendMessage that does have a clearMessage instead of postRunnable
This time I'll write for you (most for fix convention with camel case):
The stop function is at the second button action listener
package com.example.rimapps.stopwatch;
import android.os.Handler;
import android.os.SystemClock;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import java.text.SimpleDateFormat;
import java.util.Date;
public class MainActivity extends AppCompatActivity {
TextView textView;
Button but1,but2;
long millisecondTIme,starTime,timeBuff,updateTime=0L;
Handler handler;
int milliSeconds,seconds,minutes,hour;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView=(TextView)findViewById(R.id.textView);
but1=(Button)findViewById(R.id.buttonstart);
but2=(Button)findViewById(R.id.buttonstop);
handler = new Handler() {
public void handleMessage(Message what) {
millisecondTIme=SystemClock.uptimeMillis()-starTime;
updateTime=timeBuff+millisecondTIme;
seconds=(int)(UpdateTime/1000);
minutes=Seconds/60;
seconds=Seconds%60;
milliSeconds=(int)(updateTime%1000);
textView.setText("" + minutes + ":"
+ String.format("%02d", seconds) + ":"
+ String.format("%03d", milliSeconds));
handler.sendEmptyMessageDelayed(0, 1000); //repost in a loop
}
}
but1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
starTime=SystemClock.uptimeMillis();
handler.sendEmptyMessage(0); //Here send message with id 0
}
});
but2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
millisecondTIme=0L;
timeBuff = 0L ;
updateTime = 0L ;
seconds = 0 ;
minutes = 0 ;
milliSeconds = 0 ;
textView.setText("00:00:00");
handler.removeMessages(0); //Here clear all messages with same id
}
});
}
}

Timer App closing out after second onClick of the START button

I am pretty new to android and am making a timer app (The code is not complete, as you can see, but I am testing on thing at a time). hitting the start button a second time results in the app closing out. I edited my code so that the timer is being recreated each call to onClick, but the app still closes out after the second click. Thank you for the help.
package com.example.ryan.timerapp;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import java.util.Timer;
import java.util.TimerTask;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
secondsView = (TextView) findViewById(R.id.seconds);
tenSecondsView = (TextView) findViewById(R.id.tensSeconds);
hoursView = (TextView) findViewById(R.id.hours);
tenHoursView = (TextView) findViewById(R.id.tensHours);
minutesView = (TextView) findViewById(R.id.minutes);
tenMinutesView = (TextView) findViewById(R.id.tensMinutes);
timer = new Timer();
}
TextView secondsView;
TextView tenSecondsView;
TextView hoursView;
TextView tenHoursView;
TextView minutesView;
TextView tenMinutesView;
Timer timer;
TimerTask timerTask;
public void start(View view){
if(timer != null) {
timerTask.cancel();
timer.cancel();
}
timer = new Timer();
timerTask = new TimerTask() {
#Override
public void run() {
runOnUiThread(new Thread(new Runnable() {
#Override
public void run() {
int secondsInt = Integer.parseInt(secondsView.getText().toString());
int tenSecondsInt = Integer.parseInt(tenSecondsView.getText().toString());
int hoursInt = Integer.parseInt(hoursView.getText().toString());
int tenHoursInt = Integer.parseInt(tenHoursView.getText().toString());
int minutesInt = Integer.parseInt(minutesView.getText().toString());
int tenMinutesInt = Integer.parseInt(tenMinutesView.getText().toString());
if (secondsInt < 9) {
secondsInt++;
secondsView.setText(secondsInt + "");
} else {
secondsInt = 0;
secondsView.setText(secondsInt + "");
if (tenSecondsInt < 6) {
tenSecondsInt++;
tenSecondsView.setText(tenSecondsInt + "");
} else {
tenSecondsInt = 0;
tenSecondsView.setText(tenSecondsInt + "");
if (minutesInt < 9) {
minutesInt++;
minutesView.setText(minutesInt + "");
} else {
minutesInt = 0;
minutesView.setText(minutesInt + "");
}
}
}
}
}));
}
};
timer.scheduleAtFixedRate(timerTask,0, 1000);
}
public void stop(View view){
timer.cancel();
}
public void reset(View view){
secondsView.setText("0");
tenSecondsView.setText("0");
minutesView.setText("0");
tenMinutesView.setText("0");
hoursView.setText("0");
tenHoursView.setText("0");
}
}
XML:
<?xml version="1.0" encoding="utf-8"?>
<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:orientation="vertical"
tools:context="com.example.ryan.timerapp.MainActivity"
android:layout_margin="5dp"
>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="35sp"
android:text="Timer"
android:gravity="center"
/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center"
android:layout_weight="2"
>
<TextView
android:id="#+id/tensHours"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="35sp"
android:text="0"
/>
<TextView
android:id="#+id/hours"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="35sp"
android:text="0"
/>
<TextView
android:id="#+id/firstColon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="35sp"
android:text=":"
/>
<TextView
android:id="#+id/tensMinutes"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="35sp"
android:text="0"
/>
<TextView
android:id="#+id/minutes"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="35sp"
android:text="0"
/>
<TextView
android:id="#+id/secondColon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="30sp"
android:text=":"
/>
<TextView
android:id="#+id/tensSeconds"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="35sp"
android:text="0"
/>
<TextView
android:id="#+id/seconds"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="35sp"
android:text="0"
/>
</LinearLayout>
<Button
android:id="#+id/startButton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="2"
android:text="START"
android:textSize="30sp"
android:onClick="start"
/>
<Button
android:id="#+id/stopButton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="2"
android:text="STOP"
android:textSize="30sp"
android:onClick="stop"
/>
<Button
android:id="#+id/resetButton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dp"
android:layout_weight="2"
android:text="RESET"
android:textSize="30sp"
android:onClick="reset"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
/>
</LinearLayout>

the first being the Seconds counter not updating past 1 second
TimerTask is used to run a particular task at a specified time.
timer.schedule() is not meant to run continuously.
Check this documentation.
So this block of code-
int secondsInt = Integer.parseInt(txt.getText().toString());
secondsInt++;
if(secondsInt<=6) {
txt.setText(secondsInt + "");
}
will run only once . Hence
Seconds counter not updating past 1 second
is the apparent behavior.
hitting the start button a second time results in the app closing out
You are trying to run an already scheduled TimerTask.
You need to create a new Timer instance to start your TimerTask again.
Change your start() method -
public void start(View view){
if(timer != null) {
timerTask.cancel();
timer.cancel();
}
timer = new Timer();
timerTask = new TimerTask() {
#Override
public void run() {
runOnUiThread(new Thread(new Runnable() {
#Override
public void run() {
int secondsInt = Integer.parseInt(txt.getText().toString());
secondsInt++;
if(secondsInt<=6) {
seconds.setText(secondsInt + "");
}
}
}));
}
};
timer.scheduleAtFixedRate(timerTask,0, 1000);
}
Also, no need to initialize your TextView again and again . Do it once only in onCreate() -
private TextView seconds;
private Timer timer;
private TimerTask timerTask;
In onCreate()
seconds = (TextView) findViewById(R.id.seconds);

Android TImer: Add a timer

I've been experimenting with Eclipse a bit...
and I almost finished a timer :)
Although, I can't get the Reset button working...
Res/Layout/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:background="#000000"
android:layout_height="match_parent" >
<TextView
android:id="#+id/timerValue"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#+id/pauseButton"
android:layout_centerHorizontal="true"
android:layout_marginBottom="37dp"
android:textSize="40sp"
android:textColor="#ffffff"
android:text="#string/timerVal" />
<Button
android:id="#+id/startButton"
android:layout_width="90dp"
android:layout_height="45dp"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="38dp"
android:text="#string/startButtonLabel" />
<Button
android:id="#+id/pauseButton"
android:layout_width="90dp"
android:layout_height="45dp"
android:layout_alignBaseline="#+id/startButton"
android:layout_alignBottom="#+id/startButton"
android:layout_alignParentRight="true"
android:layout_marginRight="38dp"
android:text="#string/pauseButtonLabel" />
<Button
android:id="#+id/resetButton"
android:layout_width="90dp"
android:layout_height="45dp"
android:layout_above="#+id/timerValue"
android:layout_centerHorizontal="true"
android:layout_marginBottom="31dp"
android:text="#string/resetButtonLabel" />
</RelativeLayout>
[/code]
[B]res/values/strings.xml[/B]
[code]<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">Timer</string>
<string name="action_settings">Settings</string>
<string name="hello_world">Hello world!</string>
<string name="timerVal">00:00:00</string>
<string name="pauseButtonLabel">Pause</string>
<string name="startButtonLabel">Start</string>
<string name="resetButtonLabel">Reset</string>
</resources>
MainActivity.java
package com.MertensMobile.Timer;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.SystemClock;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends Activity {
private Button startButton;
private Button pauseButton;
private TextView timerValue;
private long startTime = 0L;
private Handler customHandler = new Handler();
long timeInMilliseconds = 0L;
long timeSwapBuff = 0L;
long updatedTime = 0L;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
timerValue = (TextView) findViewById(R.id.timerValue);
startButton = (Button) findViewById(R.id.startButton);
startButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
startTime = SystemClock.uptimeMillis();
customHandler.postDelayed(updateTimerThread, 0);
}
});
pauseButton = (Button) findViewById(R.id.pauseButton);
pauseButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
timeSwapBuff += timeInMilliseconds;
customHandler.removeCallbacks(updateTimerThread);
}
});
resetButton = (Button) findViewById(R.id.resetButton);
resetButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
timeSwapBuff += timeInMilliseconds;
customHandler.removeCallbacks(updateTimerThread);
}
});
}
private Runnable updateTimerThread = new Runnable() {
public void run() {
timeInMilliseconds = SystemClock.uptimeMillis() - startTime;
updatedTime = timeSwapBuff + timeInMilliseconds;
int secs = (int) (updatedTime / 1000);
int mins = secs / 60;
secs = secs % 60;
int milliseconds = (int) (updatedTime % 1000);
timerValue.setText("" + mins + ":"
+ String.format("%02d", secs) + ":"
+ String.format("%03d", milliseconds));
customHandler.postDelayed(this, 0);
}
public void Reset() {
Intent intent = getIntent();
overridePendingTransition(0, 0);
intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
finish();
overridePendingTransition(0, 0);
startActivity(intent);
}
};
}
I'm very close, (at least I think I am) :P
I got it working on my cellphone, just the reset isn't working yet :o

I think you can use this to reset the timer.
TimerValue.cancel();
TextView digital_display = (TextView) findViewById(R.id.digital_display);
digital_display.setText("00:00.0");

Why does setText() cause TextView to be re-printed at the top of the screen?

[edit] I have three sections: Title, Status, Priority, Time and Date, that are vertically aligned in that order. My problem is that when I setText() 'time' or 'date', the 'Priority' section and 'Time and Date' section get hoisted up. That is to say, the title of the 'Priority' section is completely align with the top bar and the 'Time and Date' title is right alongside it overlapping the content (instead of being below it).
The other two sections remain in their spot (at the top) but they are overlapped.
At the bottom are pictures.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<!-- Title -->
<TextView
android:id="#+id/TitleLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/title_string"
android:textAppearance="?android:attr/textAppearanceLarge" >
</TextView>
<EditText
android:id="#+id/title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#+id/TitleLabel"
android:layout_marginTop="0dp"
android:ems="10"
android:hint="#string/enter_title_string"
android:inputType="textShortMessage">
<requestFocus />
</EditText>
<!-- Status -->
<TextView
android:id="#+id/status"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#+id/title"
android:layout_marginTop="25dp"
android:text="#string/status_string"
android:textAppearance="?android:attr/textAppearanceLarge" />
<RadioGroup
android:id="#+id/statusGroup"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#id/status"
android:orientation="horizontal"
android:layout_marginTop="12dp" >
<RadioButton
android:id="#+id/statusDone"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/done_string" />
<RadioButton
android:id="#+id/statusNotDone"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="true"
android:text="#string/not_done_string" />
</RadioGroup>
<!-- Priority -->
<TextView
android:id="#+id/priority"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#id/statusGroup"
android:layout_marginTop="0dp"
android:text="#string/priority_string"
android:textAppearance="?android:attr/textAppearanceLarge" />
<RadioGroup
android:id="#+id/priorityGroup"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#id/priority"
android:orientation="horizontal"
android:layout_marginTop="0dp"
android:text="#string/priority_string" >
<RadioButton
android:id="#+id/lowPriority"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/priority_low_string" />
<RadioButton
android:id="#+id/medPriority"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="true"
android:text="#string/priority_medium_string" />
<RadioButton
android:id="#+id/highPriority"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/priority_high_string" />
</RadioGroup>
<!-- Time and Date -->
<TextView
android:id="#+id/time_and_date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#id/priorityGroup"
android:layout_marginTop="0dp"
android:text="#string/time_and_date_string"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="#+id/date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#+id/time_and_date"
android:layout_marginTop="0dp"
android:text="#string/no_date_set_string" />
<TextView
android:id="#+id/time"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_below="#+id/time_and_date"
android:text="#string/no_time_set_string" />
<Button
android:id="#+id/date_picker_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#id/date"
android:text="#string/choose_date_string" />
<Button
android:id="#+id/time_picker_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignTop="#id/date_picker_button"
android:layout_below="#id/time"
android:text="#string/choose_time_string" />
<!-- Buttons -->
<Button
android:id="#+id/cancelButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_marginTop="0dp"
android:text="#string/cancel_string" />
<Button
android:id="#+id/resetButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:text="#string/reset_string" />
<Button
android:id="#+id/submitButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:text="#string/submit_string" />
</RelativeLayout>
Here is the method I use to set it. I played around by commenting stuff and with an inclusive OR, if I set the date text or the time text, it all gets hoisted up.
Here is the full code of the activity:
See setDefaultDateTime for where the setText occurs.
package course.labs.todomanager;
import java.util.Calendar;
import java.util.Date;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.app.TimePickerDialog;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.TimePicker;
import course.labs.todomanager.ToDoItem.Priority;
import course.labs.todomanager.ToDoItem.Status;
public class AddToDoActivity extends Activity {
// 7 days in milliseconds - 7 * 24 * 60 * 60 * 1000
private static final int SEVEN_DAYS = 604800000;
private static final String TAG = "Lab-UserInterface";
private static String timeString;
private static String dateString;
private static TextView dateView;
private static TextView timeView;
private Date mDate;
private RadioGroup mPriorityRadioGroup;
private RadioGroup mStatusRadioGroup;
private EditText mTitleText;
private RadioButton mDefaultStatusButton;
private RadioButton mDefaultPriorityButton;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.add_todo);
mTitleText = (EditText) findViewById(R.id.title);
mDefaultStatusButton = (RadioButton) findViewById(R.id.statusNotDone);
mDefaultPriorityButton = (RadioButton) findViewById(R.id.medPriority);
mPriorityRadioGroup = (RadioGroup) findViewById(R.id.priorityGroup);
mStatusRadioGroup = (RadioGroup) findViewById(R.id.statusGroup);
dateView = (TextView) findViewById(R.id.date);
timeView = (TextView) findViewById(R.id.time);
// Set the default date and time
setDefaultDateTime();
// OnClickListener for the Date button, calls showDatePickerDialog() to show
// the Date dialog
final Button datePickerButton = (Button) findViewById(R.id.date_picker_button);
datePickerButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
showDatePickerDialog();
}
});
// OnClickListener for the Time button, calls showTimePickerDialog() to show
// the Time Dialog
final Button timePickerButton = (Button) findViewById(R.id.time_picker_button);
timePickerButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
showTimePickerDialog();
}
});
// OnClickListener for the Cancel Button,
final Button cancelButton = (Button) findViewById(R.id.cancelButton);
cancelButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
log("Entered cancelButton.OnClickListener.onClick()");
//TODO - Implement onClick().
setResult(RESULT_CANCELED);
finish();
}
});
//OnClickListener for the Reset Button
final Button resetButton = (Button) findViewById(R.id.resetButton);
resetButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
log("Entered resetButton.OnClickListener.onClick()");
//TODO - Reset data fields to default values
mTitleText.setText("");
setDefaultDateTime();
mStatusRadioGroup.setId(R.id.statusDone);
mPriorityRadioGroup.setId(R.id.medPriority);
}
});
// OnClickListener for the Submit Button
// Implement onClick().
final Button submitButton = (Button) findViewById(R.id.submitButton);
submitButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
log("Entered submitButton.OnClickListener.onClick()");
// Gather ToDoItem data
//TODO - Get Priority
Priority priority = getPriority();
//TODO - Get Status
Status status = getStatus();
//TODO - Title
String titleString = mTitleText.getText().toString();
// Date
String fullDate = dateString + " " + timeString;
// Package ToDoItem data into an Intent
Intent data = new Intent();
ToDoItem.packageIntent(data, titleString, priority, status, fullDate);
//TODO - return data Intent and finish
setResult(RESULT_OK, data);
finish();
}
});
}
// Use this method to set the default date and time
private void setDefaultDateTime() {
// Default is current time + 7 days
mDate = new Date();
mDate = new Date(mDate.getTime() + SEVEN_DAYS);
Calendar c = Calendar.getInstance();
c.setTime(mDate);
setDateString(c.get(Calendar.YEAR), c.get(Calendar.MONTH),
c.get(Calendar.DAY_OF_MONTH));
dateView.setText(dateString);
setTimeString(c.get(Calendar.HOUR_OF_DAY), c.get(Calendar.MINUTE),
c.get(Calendar.MILLISECOND));
timeView.setText(timeString);
}
private static void setDateString(int year, int monthOfYear, int dayOfMonth) {
// Increment monthOfYear for Calendar/Date -> Time Format setting
monthOfYear++;
String mon = "" + monthOfYear;
String day = "" + dayOfMonth;
if (monthOfYear < 10)
mon = "0" + monthOfYear;
if (dayOfMonth < 10)
day = "0" + dayOfMonth;
dateString = year + "-" + mon + "-" + day;
}
private static void setTimeString(int hourOfDay, int minute, int mili) {
String hour = "" + hourOfDay;
String min = "" + minute;
if (hourOfDay < 10)
hour = "0" + hourOfDay;
if (minute < 10)
min = "0" + minute;
timeString = hour + ":" + min + ":00";
}
private Priority getPriority() {
switch (mPriorityRadioGroup.getCheckedRadioButtonId()) {
case R.id.lowPriority: {
return Priority.LOW;
}
case R.id.highPriority: {
return Priority.HIGH;
}
default: {
return Priority.MED;
}
}
}
private Status getStatus() {
switch (mStatusRadioGroup.getCheckedRadioButtonId()) {
case R.id.statusDone: {
return Status.DONE;
}
default: {
return Status.NOTDONE;
}
}
}
// DialogFragment used to pick a ToDoItem deadline date
public static class DatePickerFragment extends DialogFragment implements
DatePickerDialog.OnDateSetListener {
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current date as the default date in the picker
final Calendar c = Calendar.getInstance();
int year = c.get(Calendar.YEAR);
int month = c.get(Calendar.MONTH);
int day = c.get(Calendar.DAY_OF_MONTH);
// Create a new instance of DatePickerDialog and return it
return new DatePickerDialog(getActivity(), this, year, month, day);
}
#Override
public void onDateSet(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
setDateString(year, monthOfYear, dayOfMonth);
dateView.setText(dateString);
}
}
// DialogFragment used to pick a ToDoItem deadline time
public static class TimePickerFragment extends DialogFragment implements
TimePickerDialog.OnTimeSetListener {
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current time as the default values for the picker
final Calendar c = Calendar.getInstance();
int hour = c.get(Calendar.HOUR_OF_DAY);
int minute = c.get(Calendar.MINUTE);
// Create a new instance of TimePickerDialog and return
return new TimePickerDialog(getActivity(), this, hour, minute,
true);
}
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
setTimeString(hourOfDay, minute, 0);
timeView.setText(timeString);
}
}
private void showDatePickerDialog() {
DialogFragment newFragment = new DatePickerFragment();
newFragment.show(getFragmentManager(), "datePicker");
}
private void showTimePickerDialog() {
DialogFragment newFragment = new TimePickerFragment();
newFragment.show(getFragmentManager(), "timePicker");
}
private void log(String msg) {
try {
Thread.sleep(500);
} catch (InterruptedException e) {
e.printStackTrace();
}
Log.i(TAG, msg);
}
}
Any ideas? I appreciate your help!
Pics:

The problems in your code in this code
mStatusRadioGroup.setId(R.id.statusDone);
mPriorityRadioGroup.setId(R.id.medPriority);