資料不一致

AndroidManifest.xml

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

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.jing.example.nknu_.multiprocess_p18">

<application

android:allowBackup="true"

android:icon="@mipmap/ic_launcher"

android:label="@string/app_name"

android:supportsRtl="true"

android:theme="@style/AppTheme">

<activity

android:name=".MainActivity"

android:label="@string/app_name"

android:theme="@style/AppTheme.NoActionBar">

<intent-filter>

<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />

</intent-filter>

</activity>

</application>

</manifest>

MainActivity.java

package com.jing.example.nknu_.multiprocess_p18;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import android.view.View;

import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

String st;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

}

//開始執行續 t1執行緒先開始 後開t2執行緒

public void Start(View v){

RaceCondition race = new RaceCondition();

race.startTwoThreads();

}

//用於清除st 以及 text UI內容

public void clear(View v){

TextView txv;

txv = (TextView)findViewById(R.id.textView);

txv.setText("");

st = "";

}

public class RaceCondition{

int shareResource = 0;

public void startTwoThreads(){

Thread t1 = new Thread(new Runnable(){

@Override

public void run(){

shareResource++;

st = st + String.valueOf(shareResource) + "\n";

final String ThST = st;

//執行UI執行緒

runOnUiThread(new Runnable() {

public void run() {

TextView txv;

txv = (TextView)findViewById(R.id.textView);

txv.setText(ThST);

}

});

}

});

t1.start();//進行+1動作

Thread t2 = new Thread(new Runnable(){

@Override

public void run(){

shareResource--;

st = st + String.valueOf(shareResource) + "\n";

final String ThST = st;

//執行UI執行緒

runOnUiThread(new Runnable() {

public void run() {

TextView txv;

txv = (TextView)findViewById(R.id.textView);

txv.setText(ThST);

}

});

}

});

t2.start();//進行-1動作

}

}

}

activity_main.xml

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

<android.support.design.widget.CoordinatorLayout 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:fitsSystemWindows="true"

tools:context="com.jing.example.nknu_.multiprocess_p18.MainActivity">

<android.support.design.widget.AppBarLayout

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:theme="@style/AppTheme.AppBarOverlay">

<android.support.v7.widget.Toolbar

android:id="@+id/toolbar"

android:layout_width="match_parent"

android:layout_height="?attr/actionBarSize"

android:background="?attr/colorPrimary"

app:popupTheme="@style/AppTheme.PopupOverlay" />

</android.support.design.widget.AppBarLayout>

<include layout="@layout/content_main" />

<android.support.design.widget.FloatingActionButton

android:id="@+id/fab"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_gravity="bottom|end"

android:layout_margin="@dimen/fab_margin"

android:src="@android:drawable/ic_dialog_email" />

</android.support.design.widget.CoordinatorLayout>

content_main.xml

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

<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"

android:paddingLeft="@dimen/activity_horizontal_margin"

android:paddingRight="@dimen/activity_horizontal_margin"

android:paddingTop="@dimen/activity_vertical_margin"

app:layout_behavior="@string/appbar_scrolling_view_behavior"

tools:context="com.jing.example.nknu_.multiprocess_p18.MainActivity"

tools:showIn="@layout/activity_main">

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Start"

android:id="@+id/button"

android:onClick="Start"

android:layout_marginBottom="142dp"

android:layout_alignParentBottom="true"

android:layout_alignParentLeft="true"

android:layout_alignParentStart="true"

android:layout_marginLeft="53dp"

android:layout_marginStart="53dp" />

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:textAppearance="?android:attr/textAppearanceLarge"

android:text="Large Text"

android:id="@+id/textView"

android:maxLines="10"

android:lines="10"

android:layout_above="@+id/button"

android:layout_alignLeft="@+id/button"

android:layout_alignStart="@+id/button"

android:layout_marginBottom="64dp" />

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="clear"

android:id="@+id/button2"

android:onClick="clear"

android:layout_above="@+id/button"

android:layout_alignParentRight="true"

android:layout_alignParentEnd="true"

android:layout_marginRight="39dp"

android:layout_marginEnd="39dp" />

</RelativeLayout>