這篇部落格主要是用Chronometer 實現了倒計時,如果又不想用這種方式實現的,我的另一篇部落格中也有倒計時實現:

大家可以開啟這個連線看看

在這篇部落格中的倒計時很簡單的,原始碼已經貼出來了,大家可看看就明白了,然後在下面有兩個方法,

1.將時分秒轉為秒數

2.將秒數轉為時分秒

大家也看看吧!

MainActivity.java

import android.os.Bundle;
import android.os.SystemClock;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import
 
 android.view.View;
import android.widget.Button;
import android.widget.Chronometer;
import android.widget.TextView;


public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    private static final String TAG = "MainActivity";
    private Chronometer timer;
    private
 
 Chronometer timer1;
    private Button but;
    private Button but1;
    private Button but2;
    private Button but3;
    private TextView tv0;

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

        initViews();
        initData();
        addEvent();

    }

    private
 
 void initViews() {
        timer = (Chronometer) findViewById(R.id.timer);
        timer1 = (Chronometer) findViewById(R.id.timer1);
        but = (Button) findViewById(R.id.but);
        but1 = (Button) findViewById(R.id.but1);
        but2 = (Button) findViewById(R.id.but2);
        but3 = (Button) findViewById(R.id.but3);
        tv0 = (TextView) findViewById(R.id.tv0);
    }

    private void initData() {

    }

    private void addEvent() {
        but.setOnClickListener(this);
        but1.setOnClickListener(this);
        but2.setOnClickListener(this);
        but3.setOnClickListener(this);
    }


    @Override
    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.but:
                but.setText("點選清零,從新開始 ");
                timer.setBase(SystemClock.elapsedRealtime());//計時器清零
                timer.start();
                break;
            case R.id.but1:
                but1.setText("點選清零,從新開始");
                timer1.setBase(SystemClock.elapsedRealtime());//計時器清零
                int hour = (int) ((SystemClock.elapsedRealtime() - timer1.getBase()) / 1000 / 60);
                timer1.setFormat("0" + String.valueOf(hour) + ":%s");
                timer1.start();
                break;
            case R.id.but2:

                if (but2.getText().toString().equals("點選暫停")) {
                    timer1.stop();//計時停止但是不清零
                    but2.setText("點選開始");
                } else {
                    timer1.start();//計時停止但是不清零
                    but2.setText("點選暫停");
                }

                break;
            case R.id.but3:
//                Toast.makeText(this, + "", Toast.LENGTH_SHORT).show();

                tv0.setText("當前時間" + timer1.getText().toString() + "\n" +
                        "當前總秒數: " + formatTurnSecond(timer1.getText().toString()) + "\n" +
                        "當前總毫秒數: " + formatTurnSecond(timer1.getText().toString()) * 1000 + "\n" +
                        "當前時間: " + change((int) formatTurnSecond(timer1.getText().toString()))
                );

                break;
        }
    }

    /*
    * 將時分秒轉為秒數
    * */
    public long formatTurnSecond(String time) {
        String s = time;
        int index1 = s.indexOf(":");
        int index2 = s.indexOf(":", index1 + 1);
        int hh = Integer.parseInt(s.substring(0, index1));
        int mi = Integer.parseInt(s.substring(index1 + 1, index2));
        int ss = Integer.parseInt(s.substring(index2 + 1));

        Log.e(TAG, "formatTurnSecond: 時間== " + hh * 60 * 60 + mi * 60 + ss);
        return hh * 60 * 60 + mi * 60 + ss;
    }

    /*
        * 將秒數轉為時分秒
        * */
    public String change(int second) {
        int h = 0;
        int d = 0;
        int s = 0;
        int temp = second % 3600;
        if (second > 3600) {
            h = second / 3600;
            if (temp != 0) {
                if (temp > 60) {
                    d = temp / 60;
                    if (temp % 60 != 0) {
                        s = temp % 60;
                    }
                } else {
                    s = temp;
                }
            }
        } else {
            d = second / 60;
            if (second % 60 != 0) {
                s = second % 60;
            }
        }

        return h + ":" + d + ":" + s + "";
    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.time.MainActivity">

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

        <Chronometer
            android:id="@+id/timer"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:format="%s"
            android:gravity="center" />

        <Button
            android:id="@+id/but"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="點選開始" />

        <Chronometer
            android:id="@+id/timer1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:format="00:00:00"
            android:gravity="center" />

        <Button
            android:id="@+id/but1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="點選開始" />

        <Button
            android:id="@+id/but2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="點選暫停" />

        <Button
            android:id="@+id/but3"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="點選獲取時間" />

        <TextView
            android:id="@+id/tv0"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />

    </LinearLayout>
</ScrollView>