0

当我激活开始时间时，我希望看到在我从移动横向从垂直变为水平以及从水平变为垂直期间增加的数字。

障碍：
当数字显示的值增加并且我想将移动景观从垂直视图更改为水平视图时。当我这样做时，数字会从头开始。

今天，我是android的新手，下面的源代码不起作用。

我错过了什么？

--------------------------
class StopwatchActivity





package com.jfdimarzio.stopwatch4;

import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

public class StopwatchActivity extends AppCompatActivity {

    private int seconds = 0;
    private boolean running;
    private boolean wasRunning;

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

        if(savedInstanceState != null)
        {
            seconds = savedInstanceState.getInt("Seconds");
            running = savedInstanceState.getBoolean("running");
            wasRunning = savedInstanceState.getBoolean("wasRunning");
        }

        runTimer();
    }

    @Override
    public void onSaveInstanceState(Bundle savedInstanceState)
    {
        savedInstanceState.putInt("seconds", seconds);
        savedInstanceState.putBoolean("running", running);
        savedInstanceState.putBoolean("wasRunning", wasRunning);
    }

    @Override
    protected void onStop()
    {
        super.onStop();
        wasRunning = running;
        running = false;
    }

    @Override
    protected void onStart()
    {
        super.onStart();
        if(wasRunning)
        {
            running = true;
        }
    }


    @Override
    protected void onPause()
    {
        super.onPause();
        wasRunning = running;
        running = false;
    }


    @Override
    protected void onResume()
    {
        super.onResume();
        if (wasRunning) {
            running = true;
        }
    }



    public void onClickStart(View view)
    {
        running = true;
    }

    public void onClickStop(View view)
    {
        running = false;
    }

    public void onClickReset(View view)
    {
        running = false;
        seconds= 0;
    }


    private void runTimer()
    {
        final TextView timeView = (TextView)findViewById(R.id.time_view);
        final Handler handler = new Handler();
        handler.post(new Runnable()
        {
            @Override
            public void run()
            {
                int hours = seconds/3600;
                int minutes = (seconds%3600)/60;
                int secs = seconds%60;
                String time = String.format("%d:%02d:%02d", hours, minutes, secs);
                timeView.setText(time);

                if(running)
                {
                    seconds++;
                }

                handler.postDelayed(this, 1000);
            }

        });

    }



}



------------------------------
activity_stopwatch.xml




<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_stopwatch"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    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.jfdimarzio.stopwatch4.StopwatchActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        android:id="@+id/textView" />

    <TextView
        android:id="@+id/time_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="0dp"
        android:text=""
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:textSize="92sp" />

    <Button
        android:id="@+id/start_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/time_view"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="20dp"
        android:onClick="onClickStart"
        android:text="@string/start" />

    <Button
        android:id="@+id/stop_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/start_button"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="10dp"
        android:onClick="onClickStop"
        android:text="@string/stop" />

    <Button
        android:id="@+id/reset_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/stop_button"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="10dp"
        android:onClick="onClickReset"
        android:text="@string/reset" />


</RelativeLayout>




------------------------------
strings.xml




<resources>
    <string name="app_name">Stopwatch4</string>
    <string name="start">Start</string>
    <string name="stop">Stop</string>
    <string name="reset">Reset</string>
</resources>
4

1 回答 1

0

您使用 savedInstanceState.putInt(" s econds") 但 savedInstanceState.getInt(" S econds"); 在 onCreate() 中将“秒”更改为“秒”。

希望对您有所帮助，我是 StackOverFlow 的新手。

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

    if(savedInstanceState != null)
    {
        seconds = savedInstanceState.getInt("seconds");
        running = savedInstanceState.getBoolean("running");
        wasRunning = savedInstanceState.getBoolean("wasRunning");
    }

    runTimer();
}
于 2016-11-13T06:34:42.207 回答