[Java][Android] 안드로이드 자바 스톱워치 구현

이번에는 Android 에서 Java로 스톱워치를 구현해보겠습니다.

 

전체 코드입니다.

public class MainActivity extends AppCompatActivity {

    private Button mStartBtn, mStopBtn, mRecordBtn, mPauseBtn;
    private TextView mTimeTextView, mRecordTextView;
    private Thread timeThread = null;
    private Boolean isRunning = true;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        if (Build.VERSION.SDK_INT >= 21) {
            getWindow().setStatusBarColor(Color.parseColor("#4ea1d3"));
        }

        mStartBtn = (Button) findViewById(R.id.btn_start);
        mStopBtn = (Button) findViewById(R.id.btn_stop);
        mRecordBtn = (Button) findViewById(R.id.btn_record);
        mPauseBtn = (Button) findViewById(R.id.btn_pause);
        mTimeTextView = (TextView) findViewById(R.id.timeView);
        mRecordTextView = (TextView) findViewById(R.id.recordView);

        mStartBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                v.setVisibility(View.GONE);
                mStopBtn.setVisibility(View.VISIBLE);
                mRecordBtn.setVisibility(View.VISIBLE);
                mPauseBtn.setVisibility(View.VISIBLE);

                timeThread = new Thread(new timeThread());
                timeThread.start();
            }
        });

        mStopBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                v.setVisibility(View.GONE);
                mRecordBtn.setVisibility(View.GONE);
                mStartBtn.setVisibility(View.VISIBLE);
                mPauseBtn.setVisibility(View.GONE);
                mRecordTextView.setText("");
                timeThread.interrupt();
            }
        });

        mRecordBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mRecordTextView.setText(mRecordTextView.getText() + mTimeTextView.getText().toString() + "\n");
            }
        });

        mPauseBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                isRunning = !isRunning;
                if (isRunning) {
                    mPauseBtn.setText("일시정지");
                } else {
                    mPauseBtn.setText("시작");
                }
            }
        });
    }

    @SuppressLint("HandlerLeak")
    Handler handler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            int mSec = msg.arg1 % 100;
            int sec = (msg.arg1 / 100) % 60;
            int min = (msg.arg1 / 100) / 60;
            int hour = (msg.arg1 / 100) / 360;

            @SuppressLint("DefaultLocale") String result = String.format("%02d:%02d:%02d:%02d", hour, min, sec, mSec);
            mTimeTextView.setText(result);
        }
    };

    public class timeThread implements Runnable {
        @Override
        public void run() {
            int i = 0;

            while (true) {
                while (isRunning) { //일시정지를 누르면 멈춤
                    Message msg = new Message();
                    msg.arg1 = i++;
                    handler.sendMessage(msg);

                    try {
                        Thread.sleep(10);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                        runOnUiThread(new Runnable(){
                            @Override
                            public void run() {
                                mTimeTextView.setText("");
                                mTimeTextView.setText("00:00:00:00");
                            }
                        });
                        return; 
                    }
                }
            }
        }
    }
}

XML 입니다.

<?xml version="1.0" encoding="utf-8"?>
<ScrollView 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=".MainActivity">


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">


        <TextView
            android:id="@+id/timeView"
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:gravity="center"
            android:text="00:00:00:00"
            android:textSize="35dp"
            android:textStyle="bold" />


        <RelativeLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="15dp"
            android:layout_marginRight="15dp"
            android:layout_marginTop="20dp">

            <Button
                android:id="@+id/btn_start"
                android:layout_width="match_parent"
                android:layout_height="70dp"
                android:text="시작" />

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="horizontal">

                <Button
                    android:id="@+id/btn_record"
                    android:layout_width="0dp"
                    android:layout_height="70dp"
                    android:layout_weight="1"
                    android:layout_marginRight="3dp"
                    android:text="기록"
                    android:visibility="invisible" />

                <Button
                    android:id="@+id/btn_pause"
                    android:layout_width="0dp"
                    android:layout_height="70dp"
                    android:layout_weight="1"
                    android:layout_marginRight="3dp"
                    android:text="일시정지"
                    android:visibility="invisible" />

                <Button
                    android:id="@+id/btn_stop"
                    android:layout_width="0dp"
                    android:layout_height="70dp"
                    android:layout_weight="1"
                    android:text="중지"
                    android:visibility="invisible" />
            </LinearLayout>

        </RelativeLayout>

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="15dp"
            android:layout_marginTop="20dp"
            android:text="기록"
            android:textSize="22dp" />

        <View
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:layout_marginLeft="15dp"
            android:layout_marginRight="15dp"
            android:layout_marginTop="5dp">

        </View>

        <TextView
            android:id="@+id/recordView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="15dp"
            android:layout_marginTop="15dp"
            android:text=""
            android:textSize="22dp" />


    </LinearLayout>


</ScrollView>