How to implement pause and resume method in countdowntimer
Hi I am using the countdown concept. Here, when I press the start button, the countdown will start. and also to stop it working, but I need to implement a pause and resume method during the countdown timer. the countdown will pause when I press the pause button. the countdown will start from the pause value when I press the start button. eg: my countdown is from 0 to 30, suppose if I press the pause button, the value is paused: 25 or 15 whatever. the countdown will start at 25 when I press the start button. I hope you all understand my problem that I have tried but I am not getting any solution, can you please help me.
public class MainActivity extends ActionBarActivity implements OnClickListener {
private CountDownTimer countDownTimer;
private boolean timerHasStarted = false;
private Button startB;
public TextView text;
private final long startTime = 30 * 1000;
private final long interval = 1 * 1000;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
startB = (Button) this.findViewById(R.id.button);
startB.setOnClickListener((OnClickListener) this);
text = (TextView) this.findViewById(R.id.timer);
countDownTimer = new MyCountDownTimer(startTime, interval);
text.setText(text.getText() + String.valueOf(startTime / 1000));
}
public void onClick(View v) {
if (!timerHasStarted) {
countDownTimer.start();
timerHasStarted = true;
startB.setText("STOP");
} else {
countDownTimer.cancel();
timerHasStarted = false;
startB.setText("RESTART");
}
}
public class MyCountDownTimer extends CountDownTimer {
public MyCountDownTimer(long startTime, long interval) {
super(startTime, interval);
}
@Override
public void onFinish() {
//text.setText("Time up!");
countDownTimer.start();
}
@Override
public void onTick(long millisUntilFinished) {
text.setText("" + millisUntilFinished / 1000);
}
}
}
<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:id="@+id/rl" >
<TextView
android:id="@+id/timer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:paddingRight="10dip"
android:textSize="50dp" />
<Button
android:id="@+id/button"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:text="Start" />
</RelativeLayout>
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1 answer
The only way I can see is to cancel the timer when pause is called and create a new one when you want to resume it, something like this:
public class MainActivity extends ActionBarActivity implements OnClickListener {
private MyCountDownTimer countDownTimer;
private boolean timerHasStarted = false;
private Button startB;
public TextView text;
private final long startTime = 30 * 1000;
private final long interval = 1 * 1000;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
startB = (Button) this.findViewById(R.id.button);
startB.setOnClickListener(this);
text = (TextView) this.findViewById(R.id.timer);
countDownTimer = new MyCountDownTimer(startTime, interval,text );
// Set starting value
text.setText(text.getText() + String.valueOf(startTime / 1000));
}
public void onClick(View v) {
if (!timerHasStarted) {
// Start or resume counter
countDownTimer = countDownTimer.resume();
timerHasStarted = true;
startB.setText("PAUSE");
} else {
// Pause counter
countDownTimer.pause();
timerHasStarted = false;
startB.setText("RESTART");
}
}
public class MyCountDownTimer extends CountDownTimer
{
private long mRemainingTime = 0;
private long mInterval = 0;
private TextView mtvxToUpdate = null
// Use a textview reference to update text on each tick()
public MyCountDownTimer(long startTime, long interval,TextView txv ) {
super(startTime, interval);
this.mInterval = interval;
this.mRemainingTime = startTime;
this.mtvxToUpdate = txv;
}
@Override
public void onFinish() {
mtvxToUpdate.setText("Time up!");
}
@Override
public void onTick(long millisUntilFinished) {
mRemainingTime = millisUntilFinished;
mtvxToUpdate.setText("" + millisUntilFinished / 1000);
}
public void pause(){
// Stop current timer
this.cancel();
}
public MyCountDownTimer resume(){
// Create a counter with last saved data (just before pause)
MyCountDownTimer newTimer = new MyCountDownTimer(mRemainingTime,mInterval,mtvxToUpdate);
// Start this new timer that start where old one stop
newTimer.start();
// Return this new timer
return newTimer;
}
}
}
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