Java Can'；t将变量放入txt文件中

我需要保存这个变量，为此，我将它导出到一个

.txt

文件中。然而，它并没有这样做，而是被抓住了。有人能告诉我我做错了什么吗。提前谢谢

 public class AltonAir extends AppCompatActivity {

public class AltonAir extends AppCompatActivity {
SharedPreferences sharedPref = getApplicationContext().getSharedPreferences("AltonAirCount", Context.MODE_PRIVATE);

public int rideCount = sharedPref.getInt("RideCount", 0);

void updateListString() {

    final int[] Track = {840};
    int localTrack = Track[0];
    final int[] Inversions = {2};
    int localInversions = Inversions[0];
    final int[] Time = {100};
    int localTime = Time[0];
    final double[] gForce = {3.5};
    double localGForce = gForce[0];

    final String[][] airStatsString = {{"Length Covered: " + localTrack * rideCount + "m",
            "Total Inversions Experienced: " + localInversions * rideCount,
            "Total Time on Air: " + localTime * rideCount + "s",
            "Total G-Force Experienced:" + localGForce * rideCount + "G's"}};

    ListAdapter theAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,
            airStatsString[0]);

    ListView theListView = (ListView) findViewById(R.id.airStats);

    theListView.setAdapter(theAdapter);
}

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

    final File file = new File("AltonAirCount.txt");

    int rideCountFile;





    onCreate2(file, sharedPref);}

void onCreate2(final File file, final SharedPreferences sharedPref){


    TextView triviaText = (TextView) findViewById(R.id.airTriviaText);



    String rideCountString = Objects.toString(rideCount);

    final TextView[] totalRideText = {(TextView) findViewById(R.id.totalRide)};
    totalRideText[0].setText("Total Flights : " + rideCountString);

    Random rand = new Random();
    final int[] triviaNumber = {rand.nextInt(4) + 1};

    if (triviaNumber[0] == 1) {
        triviaText.setText("Air actually stands for Aerial Inversion Ride");
    } else if (triviaNumber[0] == 2) {
        triviaText.setText("Air initially went over budget so there wasn’t much theming");
    } else if (triviaNumber[0] == 3) {
        triviaText.setText("Air is one of the only rides at Alton Towers you can see above the tree line");
    } else if (triviaNumber[0] == 4) {
        triviaText.setText("Air is the latest ride to be manufactured by B&M at the park.");
    } else {
        triviaText.setText("mmm");
    }

    updateListString();


    Button triviaPlus = (Button) findViewById(R.id.triviaPlus);

    triviaPlus.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {

            triviaNumber[0] += 1;

            if (triviaNumber[0] == 5) {
                triviaNumber[0] = 1;
            }

            TextView triviaText = (TextView) findViewById(R.id.airTriviaText);
            if (triviaNumber[0] == 1) {
                triviaText.setText("Air actually stands for Aerial Inversion Ride");
            } else if (triviaNumber[0] == 2) {
                triviaText.setText("Air initially went over budget so there wasn’t much theming");
            } else if (triviaNumber[0] == 3) {
                triviaText.setText(" Air is one of the only rides at Alton Towers you can see above the tree line");
            } else if (triviaNumber[0] == 4) {
                triviaText.setText(" Air is the latest ride to be manufactured by B&M at the park.");
            } else {
                triviaNumber[0] = 1;
            }


        }
    });

    Button triviaMinus = (Button) findViewById(R.id.trivaMinus);

    triviaMinus.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {

            triviaNumber[0] -= 1;

            TextView triviaText = (TextView) findViewById(R.id.airTriviaText);
            if (triviaNumber[0] == 0) {
                triviaNumber[0] = 4;
                triviaText.setText(" Air is the latest ride to be manufactured by B&M at the park.");
            } else if (triviaNumber[0] == 1) {
                triviaText.setText("Air actually stands for Aerial Inversion Ride");
            } else if (triviaNumber[0] == 2) {
                triviaText.setText("Air initially went over budget so there wasn’t much theming");
            } else if (triviaNumber[0] == 3) {
                triviaText.setText(" Air is one of the only rides at Alton Towers you can see above the tree line");
            } else if (triviaNumber[0] == 4) {
                triviaText.setText(" Air is the latest ride to be manufactured by B&M at the park.");
            } else {
                triviaNumber[0] = 4;
            }


        }
    });

    Button ridePlus = (Button) findViewById(R.id.ridePlus);

    ridePlus.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            rideCount += 1;
            String rideCountString = Objects.toString(rideCount);

            TextView totalRideText = (TextView) findViewById(R.id.totalRide);
            totalRideText.setText("Total Flights : " + rideCountString);

            updateListString();

            try {
                PrintWriter output = new PrintWriter(file);
                output.println(rideCount);
                output.close();

            } catch (IOException ex) {

                Log.e("Exception ", String.valueOf(ex));


                Toast toast = Toast.makeText(getApplicationContext(), "It's been caught", Toast.LENGTH_SHORT);

                toast.show();
            }

        }
    });

    Button rideMinus = (Button) findViewById(R.id.rideMinus);

    rideMinus.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            rideCount -= 1;
            if (rideCount < 0) {
                rideCount = 0;
                Toast toast = Toast.makeText(getApplicationContext(), "Ride Count can't go below zero.", Toast.LENGTH_SHORT);

                toast.show();
            }
            String rideCountString = Objects.toString(rideCount);

            TextView totalRideText = (TextView) findViewById(R.id.totalRide);
            totalRideText.setText("Total Flights : " + rideCountString);


            updateListString();

            SharedPreferences.Editor editor = sharedPref.edit();
            editor.putInt("RideCount", (int) rideCount);
            editor.commit();
        }
    });}

公共类AltonAir扩展了AppCompative活动{
公共类AltonAir扩展了AppCompative活动{
SharedReferences SharedReferences=getApplicationContext（）.GetSharedReferences（“AltonAirCount”，Context.MODE\u PRIVATE）；
public int rideCount=sharedPref.getInt（“rideCount”，0）；
void updateListString（）{
最终int[]轨迹={840}；
int localTrack=Track[0]；
最终int[]逆={2}；
int本地化转换=反转[0]；
final int[]Time={100}；
int localTime=Time[0]；
最终双[]gForce={3.5}；
双本地gForce=gForce[0]；
最后一个字符串[][]airstStatssString={{“覆盖长度：”+localTrack*rideCount+“m”，
“经历的总反转数：“+局部反转数*rideCount，
“广播总时间：”+localTime*rideCount+“s”，
“经历的总重力：“+localGForce*rideCount+“G's”}”；
ListAdapter theAdapter=new ArrayAdapter（这是android.R.layout.simple\u list\u item\u 1，
空时串[0]）；
ListView theListView=（ListView）findViewById（R.id.airStats）；
设置适配器（适配器）；
}
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity\u alton\u air）；
最终文件=新文件（“AltonAirCount.txt”）；
int ridecontfile；
onCreate2（文件，SharedRef）；}
void onCreate2（最终文件文件，最终SharedReferences SharedReference）{
TextView triviaText=（TextView）findViewById（R.id.airTriviaText）；
String rideCountString=Objects.toString（rideCount）；
最终文本视图[]totalRideText={（文本视图）findViewById（R.id.totalRide）}；
totalRideText[0].setText（“航班总数：+rideCountString”）；
Random rand=新的Random（）；
final int[]triviaNumber={rand.nextInt（4）+1}；
if（triviaNumber[0]==1）{
setText（“Air实际上代表空中倒转飞行”）；
}else if（triviaNumber[0]==2）{
setText（“Air最初超出预算，所以没有太多主题化”）；
}else if（triviaNumber[0]==3）{
setText（“空中是你能在树线上方看到的阿尔顿大厦唯一的游乐设施之一”）；
}else if（triviaNumber[0]==4）{
triviaText.setText（“Air是B&M在公园制造的最新骑乘设备。”）；
}否则{
triviaText.setText（“mmm”）；
}
updateListString（）；
按钮triviaPlus=（按钮）findViewById（R.id.triviaPlus）；
triviaPlus.setOnClickListener（新视图.OnClickListener（）{
公共void onClick（视图v）{
三角数字[0]+=1；
if（triviaNumber[0]==5）{
triviaNumber[0]=1；
}
TextView triviaText=（TextView）findViewById（R.id.airTriviaText）；
if（triviaNumber[0]==1）{
setText（“Air实际上代表空中倒转飞行”）；
}else if（triviaNumber[0]==2）{
setText（“Air最初超出预算，所以没有太多主题化”）；
}else if（triviaNumber[0]==3）{
setText（“空中是你能在树线上方看到的阿尔顿大厦唯一的游乐设施之一”）；
}else if（triviaNumber[0]==4）{
triviaText.setText（“Air是B&M在公园制造的最新骑乘设备。”）；
}否则{
triviaNumber[0]=1；
}
}
});
按钮triviaMinus=（按钮）findViewById（R.id.trivaMinus）；
triviaMinus.setOnClickListener（新视图.OnClickListener（）{
公共void onClick（视图v）{
三角数字[0]-=1；
TextView triviaText=（TextView）findViewById（R.id.airTriviaText）；
if（triviaNumber[0]==0）{
triviaNumber[0]=4；
triviaText.setText（“Air是B&M在公园制造的最新骑乘设备。”）；
}else if（triviaNumber[0]==1）{
setText（“Air实际上代表空中倒转飞行”）；
}else if（triviaNumber[0]==2）{
setText（“Air最初超出预算，所以没有太多主题化”）；
}else if（triviaNumber[0]==3）{
setText（“空中是你能在树线上方看到的阿尔顿大厦唯一的游乐设施之一”）；
}else if（triviaNumber[0]==4）{
triviaText.setText（“Air是B&M在公园制造的最新骑乘设备。”）；
}否则{
triviaNumber[0]=4；
}
}
});
Button ridePlus=（Button）findViewById（R.id.ridePlus）；
setOnClickListener（新视图.OnClickListener（）{
公共void onClick（视图v）{
rideCount+=1；
String rideCountString=Objects.toString（rideCount）；
TextView totalRideText=（TextView）findViewById（R.id.totalRide）；
setText（“航班总数：+rideCountString”）；
updateListString（）；
试一试{
PrintWriter输出=新的PrintWriter（文件）；
输出.打印项数（rideCount）；
output.close（）；
}捕获（IOEX异常）{
Log.e（“异常”，String.valueOf（ex））；
Toast Toast=Toast.makeText（getApplicationContext（），“它被捕获了”，Toast.LENGTH\u SHORT）；
toast.show（）；
}
}
});
Button ridemius=（Button）findViewById（R.id.ridemius）；
setOnClickListener（新视图.OnClickListener（）{
公共void onClick（视图v）{
rideCount-=1；
如果（rideCount<0）{
rideCount=0；
敬酒
SharedPreferences sharedPref = getApplicationContext()
         .getSharedPreferences("AltonAirCount", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPref.edit();
editor.putInt("RideCount", rideCount);
editor.commit();

//                                 Key          Default Value               
long rideCount = sharedPref.getInt("RideCount", 0);