カウントダウンタイマーをつくる⑥try3の解答編

MainActivity.java

package com.example.intervaltimerdemo4;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity implements TimePickerDialogFragment.TimePickerDialogFragmentListener{

    private int start_time;
    private int START_TIME;
    Button nextBtn;
    Button configBtn;

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

        configBtn = findViewById(R.id.configBtn);
        nextBtn = findViewById(R.id.nextBtn);

        configBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                TimePickerDialogFragment timePickerDialogFragment = new TimePickerDialogFragment();
                timePickerDialogFragment.show(getSupportFragmentManager(),"TimePicker");
            }
        });

        nextBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(MainActivity.this,FirstActivity.class);
                intent.putExtra("START_TIME",START_TIME);
                startActivity(intent);
            }
        });

    }

    public void onClickButton(int hour,int minute) {
        TextView textView = findViewById(R.id.textView);
        String hourStr = String.valueOf(hour);
        String minuteStr;
        if(minute<10){
            minuteStr = "0"+String.valueOf(minute);
        }else{
            minuteStr = String.valueOf(minute);
        }
        String timeStr = hourStr + ":" + minuteStr;
        textView.setText(timeStr);
        START_TIME = minute*60000 + hour*60*60000;
    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical"
    android:gravity="center_horizontal"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="40sp"/>

    <Button
        android:id="@+id/configBtn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="設定"/>

    <Button
        android:id="@+id/nextBtn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="次へ"/>

</LinearLayout>

FirstActivity.java

package com.example.intervaltimerdemo4;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.time.format.DateTimeFormatter;
import java.util.Locale;

public class FirstActivity extends AppCompatActivity {
    private int START_TIME;
    TextView text_countdown;
    Button button_start;
    Button button_pause;
    Button button_reset;

    private boolean mTimerRunning;

    CountDownTimer mCountDownTimer;
    private long mTimeLeft;

    private MediaPlayer myMediaPlayer;

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

        Intent intent = getIntent();
        START_TIME = intent.getIntExtra("START_TIME",0);
        mTimeLeft = START_TIME;

        text_countdown = findViewById(R.id.text_view_countdown);
        int hours = (int)(mTimeLeft/1000)/60/60;
        int minutes = (int)(mTimeLeft/1000)/60;
        int seconds = (int)(mTimeLeft/1000)%60;
        String timerLeftFormatted = String.format(Locale.getDefault(), "%02d:%02d:%02d",hours,minutes, seconds);
        text_countdown.setText(timerLeftFormatted);
        button_start = findViewById(R.id.button_start);
        button_pause = findViewById(R.id.button_pause);
        button_reset = findViewById(R.id.button_reset);

        button_start.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
              if(text_countdown.getText().toString().equals("00:00")){
                  Toast.makeText(FirstActivity.this,"押しても音は出ません",Toast.LENGTH_SHORT).show();
                }else{
                    if(mTimerRunning == true){
                        Toast.makeText(FirstActivity.this,"カウントダウン中は押せません",Toast.LENGTH_SHORT).show();
                    }else {
                        startTimer();
                    }
                }

            }
        });

        button_pause.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if(mTimerRunning ==true){
                    pauseTimer();
                }else{
                    Toast.makeText(FirstActivity.this,"カウントダウン停止中なので押せません",Toast.LENGTH_SHORT).show();
                }

            }
        });

        button_reset.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if(mTimerRunning == true){
                    Toast.makeText(FirstActivity.this,"カウントダウン中はリセットできません",Toast.LENGTH_SHORT).show();
                }else{
                    resetTimer();
                }

            }
        });
    }

    private void startTimer(){
        mCountDownTimer = (CountDownTimer) new MainCountDownTimer(mTimeLeft,1000);
        mCountDownTimer.start();
        mTimerRunning = true;
    }

    private void snoozeTimer(){
        mCountDownTimer = (CountDownTimer) new MainCountDownTimer(mTimeLeft,1000);
        mCountDownTimer.start();
        mTimerRunning = true;
    }

    public class MainCountDownTimer extends CountDownTimer{

        public MainCountDownTimer(long millisInFuture, long countDownInterval) {
            super(millisInFuture, countDownInterval);
        }

        @Override
        public void onTick(long TimeUntilFinished) {
            mTimeLeft = TimeUntilFinished;
            updateCountDownText();
        }

        @Override
        public void onFinish() {

            Toast.makeText(FirstActivity.this,"設定した時間が経過しました",Toast.LENGTH_LONG).show();

            myMediaPlayer = MediaPlayer.create(FirstActivity.this,R.raw.alarmdemo);
            try {
                myMediaPlayer.prepare();
            } catch (Exception e) {
                Log.v(null,e.toString());
            }
            myMediaPlayer.start();

            if(mTimerRunning == true){
                    mTimeLeft = 60000;
                    mTimerRunning = false;
                    updateCountDownText();
                    snoozeTimer();
            }else{
            }
        }
    }

    private void pauseTimer(){
        mCountDownTimer.cancel();
        mTimerRunning = false;
    }

    private void resetTimer(){
        mTimeLeft = START_TIME;
        mTimerRunning = false;
        updateCountDownText();
    }

    private void updateCountDownText(){
        int hours = (int)(mTimeLeft/1000)/60/60;
        int minutes = (int)(mTimeLeft/1000)/60;
        int seconds = (int)(mTimeLeft/1000)%60;
        String timerLeftFormatted = String.format(Locale.getDefault(), "%02d:%02d:%02d",hours,minutes, seconds);
        text_countdown.setText(timerLeftFormatted);
    }
}

activity_first.java

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:gravity="center_horizontal"
    android:orientation="vertical"
    tools:context=".FirstActivity">

    <TextView
        android:id="@+id/text_view_countdown"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="00:00:00"
        android:textSize="50sp"
        android:layout_marginTop="160sp"/>
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">

        <Button
            android:id="@+id/button_start"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="スタート"
            android:layout_marginTop="30sp"
            android:layout_marginRight="20sp"/>

        <Button
            android:id="@+id/button_pause"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="ストップ"
            android:layout_marginTop="30sp"
            android:layout_marginRight="20sp"  />

        <Button
            android:id="@+id/button_reset"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="リセット"
            android:layout_marginTop="30sp"/>
    </LinearLayout>

</LinearLayout>

TimePickerDialogFragment.java

package com.example.intervaltimerdemo4;

import android.app.AlertDialog;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.TimePickerDialog;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.widget.DatePicker;
import android.widget.TimePicker;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.DialogFragment;

import java.time.LocalDate;

public class TimePickerDialogFragment extends DialogFragment implements TimePickerDialog.OnTimeSetListener{

    @Override
    public void onTimeSet(TimePicker timePicker, int hour, int minute) {

        if (listener != null) {
            listener.onClickButton(hour,minute);
        }
    }

    public interface TimePickerDialogFragmentListener{
        void onClickButton(int hour,int minute);
    }

    private TimePickerDialogFragmentListener listener;

    public void onAttach(@NonNull Context context) {

        super.onAttach(context);

        if(context instanceof TimePickerDialogFragmentListener){
            listener = (TimePickerDialogFragmentListener) context;
        }
    }
    @NonNull
    @Override
    public Dialog onCreateDialog(@Nullable Bundle savedInstanceState){
        int hour = 0;
        int minute = 0;


        Dialog timePickerDialog = new TimePickerDialog(getActivity(),android.R.style.Theme_Black,this,hour,minute,true);
        return timePickerDialog;
    }
}