Android 複数のセンサの値をCSVファイルでデータ保存

私は，Android Stadioで，加速度と地磁気を同時に測定し，CSVファイルに変換し，保存するアプリを作成しています．
現段階では，加速度と地磁気を同時に画面上に表示できている状態ですが，CSVファイルに変換し保存ができていません．データは，SDカードに保存するように書いています．
どうか，ご指導をよろしくお願いします．JAVA言語です．

MainActivity
1 
2package com.example.myapplication;
3
4
5import java.io.BufferedWriter;
6import java.io.FileNotFoundException;
7import java.io.FileOutputStream;
8import java.io.IOException;
9import java.io.OutputStreamWriter;
10import java.io.UnsupportedEncodingException;
11import java.util.ArrayList;
12import java.util.Calendar;
13import java.util.List;
14
15import android.app.Activity;
16import android.hardware.Sensor;
17import android.hardware.SensorEvent;
18import android.hardware.SensorEventListener;
19import android.hardware.SensorManager;
20import android.os.Bundle;
21import android.widget.TextView;
22
23public class MainActivity extends Activity implements SensorEventListener, Runnable{
24
25
26    private boolean mRegisteredSensor;
27    private SensorManager mSensorManager;
28
29    // 加速度センサーの値
30    private float[] accelerometerValues = new float[3];
31    private float[] magneticValues = new float[3];
32
33
34
35
36
37    @Override
38    public void onCreate(Bundle savedInstanceState) {
39        super.onCreate(savedInstanceState);
40        setContentView(R.layout.activity_main);
41
42
43
44        mRegisteredSensor = false;
45        mSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
46        ArrayList<List<Sensor>> sensors = new ArrayList<List<Sensor>>();
47        sensors.add( mSensorManager.getSensorList(Sensor.TYPE_ACCELEROMETER));
48        sensors.add( mSensorManager.getSensorList(Sensor.TYPE_GYROSCOPE));
49
50        for(List<Sensor> sensor : sensors){
51            if(sensor.size()>0){
52                mRegisteredSensor = mSensorManager.registerListener(this,
53                        sensor.get(0),
54                        SensorManager.SENSOR_DELAY_NORMAL);
55            }
56        }
57    }
58
59    @Override
60    protected void onResume() {
61        super.onResume();
62
63
64        {
65            ArrayList<List<Sensor>> sensors = new ArrayList<List<Sensor>>();
66            sensors.add( mSensorManager.getSensorList(Sensor.TYPE_ACCELEROMETER));
67            sensors.add( mSensorManager.getSensorList(Sensor.TYPE_MAGNETIC_FIELD));
68
69            for(List<Sensor> sensor : sensors){
70                if(sensor.size()>0){
71                    mRegisteredSensor = mSensorManager.registerListener(this,
72                            sensor.get(0),
73                            SensorManager.SENSOR_DELAY_NORMAL);
74                }
75            }
76        }
77
78
79    }
80
81    @Override
82    protected void onPause() {
83        if (mRegisteredSensor) {
84            mSensorManager.unregisterListener(this);
85            mRegisteredSensor = false;
86        }
87
88        super.onPause();
89    }
90
91    @Override
92    public void onAccuracyChanged(Sensor sensor, int accuracy) {
93    }
94
95
96    @Override
97    public void onSensorChanged(SensorEvent event ) {
98        {
99            Calendar time = Calendar.getInstance();
100
101            int year = time.get(time.YEAR);
102
103            int month = time.get(time.MONTH)+1;
104
105            int day = time.get(time.DAY_OF_MONTH);
106
107            int hour = time.get(time.HOUR_OF_DAY);
108
109            int minute = time.get(time.MINUTE);
110
111            int second = time.get(time.SECOND);
112
113            int ms = time.get(time.MILLISECOND);
114
115
116            String nowtime = String.valueOf(year)+"/"+String.valueOf(month)+"/"+String.valueOf(day)+","+ String.valueOf(hour)+":"+String.valueOf(minute)+":"+ String.valueOf(second)+":" +String.valueOf(ms);
117
118
119
120
121
122            if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
123                accelerometerValues = event.values.clone();
124            }
125            else if(event.sensor.getType() == Sensor.TYPE_MAGNETIC_FIELD){
126                magneticValues = event.values.clone();
127            }
128            String FILE = "/sdcard/test.csv";
129                try {
130
131
132
133                    BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(
134
135                        new FileOutputStream(FILE, true), "UTF-8"));
136
137                String write_int =nowtime + "," +
138
139                        String.valueOf(accelerometerValues[0])+"," +
140
141                        String.valueOf(accelerometerValues[1])+"," +
142
143                        String.valueOf(accelerometerValues[2])+","+
144
145                        String.valueOf(magneticValues[0])+","+
146
147                        String.valueOf(magneticValues[1])+"," +
148
149                        String.valueOf(magneticValues[2])+"\n" ;
150
151
152
153
154                bw.write(write_int);
155
156                bw.close();
157
158            } catch (UnsupportedEncodingException k) {
159
160                k.printStackTrace();
161
162            } catch (FileNotFoundException k) {
163
164                k.printStackTrace();
165
166            } catch (IOException k) {
167
168                k.printStackTrace();
169
170            }
171
172            TextView x = (TextView)findViewById(R.id.x);
173
174            x.setText("x" + String.valueOf(accelerometerValues[0]));
175
176            TextView y = (TextView)findViewById(R.id.y);
177            y.setText("y" + String.valueOf(accelerometerValues[1]));
178
179            TextView z = (TextView)findViewById(R.id.z);
180            z.setText("z" + String.valueOf(accelerometerValues[2]));
181
182            TextView a = (TextView)findViewById(R.id.a);
183            a.setText("a" + String.valueOf(magneticValues[0]));
184
185            TextView b = (TextView)findViewById(R.id.b);
186            b.setText("b" + String.valueOf(magneticValues[1]));
187
188            TextView c = (TextView)findViewById(R.id.c);
189            c.setText("c" + String.valueOf(magneticValues[2]));
190
191
192
193
194
195//            text.setText(
196//                    "x " + accelerometerValues[0] + ", \n" +
197//                            "y " + accelerometerValues[1] + ", \n" +
198//                            "z " + accelerometerValues[2] + ", \n" +
199//                            "地磁気"+"\n"+
200//                            "mgx " + magneticValues[0] + ", \n" +
201//                            "mgy " + magneticValues[1] + ", \n" +
202//                            "mgz " + magneticValues[2]
203//
204//
205//            );
206
207        }
208
209    }
210
211    @Override
212    public void run() {
213        // TODO Auto-generated method stub
214
215    }
216
217
218    @Override
219
220    protected void onStop()
221
222    {
223
224        super.onStop();
225
226        mSensorManager.unregisterListener(this);
227
228    }
229
230}
231
232

JAVA
1<?xml version="1.0" encoding="utf-8"?>
2
3<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
4
5    android:orientation="vertical"
6
7    android:layout_width="fill_parent"
8
9    android:layout_height="fill_parent"
10
11    >
12
13    <TextView
14
15        android:layout_width="fill_parent"
16
17        android:layout_height="wrap_content"
18
19        android:text="加速度"
20
21        />
22
23    <TextView
24
25        android:id="@+id/x"
26
27        android:layout_width="fill_parent"
28
29        android:layout_height="wrap_content"
30
31        />
32
33    <TextView
34
35        android:id="@+id/y"
36
37        android:layout_width="fill_parent"
38
39        android:layout_height="wrap_content"
40
41        />
42    <TextView
43
44        android:id="@+id/z"
45
46        android:layout_width="fill_parent"
47
48        android:layout_height="wrap_content"
49
50        />
51
52    <TextView
53
54        android:layout_width="fill_parent"
55
56        android:layout_height="wrap_content"
57
58        android:text="地磁気"
59
60        />
61
62    <TextView
63
64        android:id="@+id/a"
65
66        android:layout_width="fill_parent"
67
68        android:layout_height="wrap_content"
69
70        />
71    <TextView
72
73        android:id="@+id/b"
74
75        android:layout_width="fill_parent"
76
77        android:layout_height="wrap_content"
78
79        />
80    <TextView
81
82        android:id="@+id/c"
83
84        android:layout_width="fill_parent"
85
86        android:layout_height="wrap_content"
87
88        />
89
90    
91</LinearLayout>
92
93
94