[안드로이드 스튜디오] StopWatch 스탑워치 만들기

실행화면

<?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:background="@drawable/timer"
            android:gravity="center"
            android:text="00:00:00:00"
            android:textColor="@color/myBlack"
            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:background="@drawable/button"
                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:background="@drawable/button"
                    android:text="기록"
                    android:textColor="@color/myBlack"
                    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:background="@drawable/button"
                    android:text="일시정지"
                    android:textColor="@color/myBlack"
                    android:visibility="invisible" />
 
                <Button
                    android:id="@+id/btn_stop"
                    android:layout_width="0dp"
                    android:layout_height="70dp"
                    android:layout_weight="1"
                    android:background="@drawable/button"
                    android:text="중지"
                    android:textColor="@color/myBlack"
                    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:textColor="@color/myBlack"
            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"
            android:background="@color/mainColor">
 
        </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:textColor="@color/myBlack"
            android:textSize="22dp" />
 
 
    </LinearLayout>
 
 
</ScrollView>

activity_main.xml

import android.annotation.SuppressLint;
import android.content.res.Configuration;
import android.graphics.Color;
import android.os.Build;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
 
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;
            //1000이 1초 1000*60 은 1분 1000*60*10은 10분 1000*60*60은 한시간
 
            @SuppressLint("DefaultLocale") String result = String.format("%02d:%02d:%02d:%02d", hour, min, sec, mSec);
            if (result.equals("00:01:15:00")) {
                Toast.makeText(MainActivity.this, "1분 15초가 지났습니다.", Toast.LENGTH_SHORT).show();
            }
            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; // 인터럽트 받을 경우 return
                    }
                }
            }
        }
    }
}
 

MainActivity.java

button.xml

timer.xml

Drawable 폴더에 넣어주세요

참고 자료

https://kutar37.tistory.com/entry/Thread-handler%EB%A5%BC-%EC%9D%B4%EC%9A%A9%ED%95%9C-%EC%8A%A4%ED%83%91%EC%9B%8C%EC%B9%98