Question

This seems to be a common question, “how do I pause a countdowntimer”?

I found this code which looks promising:

http://www.java2s.com/Open-Source/Android/Timer/multitimer-android/com/cycleindex/multitimer/CountDownTimerWithPause.java.htm

I’m just not sure how to implement it in code. I need to override the abstracted methods and extend the class. Can someone give me an idea how to do this?

Answer 1

Here is your layout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent"
        >
    <TextView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="0"
            android:gravity="center_horizontal"
            android:layout_marginBottom="40dp"
            android:layout_marginTop="20dp"
            android:textSize="27dp"
            android:id="@+id/txtView"/>
    <RelativeLayout
            android:layout_width="wrap_content"
            android:layout_height="fill_parent"
            android:layout_gravity="center">
        <Button
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Start"
                android:id="@+id/startButton"/>
        <Button
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Stop"
                android:id="@+id/stopButton"
                android:layout_toRightOf="@id/startButton"/>
    </RelativeLayout>
</LinearLayout>

Here is your activity class

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class MyActivity extends Activity implements View.OnClickListener {

    TextView txt = null;
    Button startButton = null;
    Button stopButton = null;
    CountDownTimerWithPause timer = null;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        txt = (TextView) findViewById(R.id.txtView);
        startButton = (Button) findViewById(R.id.startButton);
        stopButton = (Button) findViewById(R.id.stopButton);

        startButton.setOnClickListener(this);
        stopButton.setOnClickListener(this);
    }

    @Override
    public void onClick(View view) {
        if (view == startButton) {
            if (timer == null) {
                initTimer();
            }

            timer.resume();
        }

        if (view == stopButton) {
            timer.pause();
        }
    }

    private void initTimer() {
        timer = new CountDownTimerWithPause(10000, 1000, false) {
            @Override
            public void onTick(long millisUntilFinished) {
                Integer currentValue = Integer.valueOf((String) MyActivity.this.txt.getText());
                MyActivity.this.txt.setText(String.valueOf(currentValue + 1));
            }

            @Override
            public void onFinish() {
                Toast.makeText(MyActivity.this, "finish", Toast.LENGTH_SHORT).show();
            }
        };

        timer.create();
    }
}

Do not forget to copy CountDownTimerWithPause into your package.

Works for me, BUT…

I mention some bugs but it depends on your application. Maybe it’s OK for you. Bug is – when starting timer, it fires immediatelly. ‘So what?’ you might ask. Imagine you click Stop button when 3 and half seconds passed. So when you click Start button you expect half second pass before you see 4, but not in that class implementation.

And there is some strange delay at the end of counting. I’d recommend to search for better implementation.