質問編集履歴
3
サブクラスの追加
test
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File without changes
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test
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@@ -194,6 +194,48 @@
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194
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```
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```java
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private MainActivity m = new MainActivity();
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203
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//ペアデバイスを取得してサーバーに接続する
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public void scanAndConnect(Context context,BluetoothAdapter bluetoothAdapter){
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pairedDevices = bluetoothAdapter.getBondedDevices();
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if (pairedDevices.size() > 0) {
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for (BluetoothDevice device : pairedDevices) {
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Log.d("pairedDevice","Name:"+device.getName()+"Address:"+device.getAddress());
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Toast.makeText(context,"接続を開始します",Toast.LENGTH_SHORT).show();
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216
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device = bluetoothAdapter.getRemoteDevice(device.getAddress());
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bluetoothGatt = device.connectGatt(context, false, bluetoothGattCallback);
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m.setTextName("" + device.getName());
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}
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}
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if (bluetoothGatt == null) {
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Toast.makeText(context, "ペアリングされたデバイスが存在しません", Toast.LENGTH_SHORT).show();
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230
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+
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231
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}
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232
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Toast.makeText(context,"Bluetooth通信に異常が発生しています",Toast.LENGTH_LONG).show();
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234
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}
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```
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### 試したこと
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2
エラーメッセージを変更しそびれていたので変更しました
test
CHANGED
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File without changes
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test
CHANGED
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@@ -22,29 +22,15 @@
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22
22
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23
23
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E/AndroidRuntime: FATAL EXCEPTION: main
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24
24
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25
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-
Process: com.example.esp32ble, PID: 2
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25
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+
Process: com.example.esp32ble, PID: 29278
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26
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-
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26
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+
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27
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-
java.lang.NullPointerException: Attempt to invoke virtual method '
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+
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference
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28
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-
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29
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-
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28
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+
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30
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-
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31
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-
at android.view.ContextThemeWrapper.getTheme(ContextThemeWrapper.java:174)
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32
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-
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33
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-
at android.content.Context.obtainStyledAttributes(Context.java:738)
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34
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-
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35
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-
at androidx.appcompat.app.AppCompatDelegateImpl.createSubDecor(AppCompatDelegateImpl.java:839)
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36
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-
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37
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-
at androidx.appcompat.app.AppCompatDelegateImpl.ensureSubDecor(AppCompatDelegateImpl.java:806)
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38
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-
|
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39
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-
at androidx.appcompat.app.AppCompatDelegateImpl.findViewById(AppCompatDelegateImpl.java:630)
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40
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-
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41
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-
at androidx.appcompat.app.AppCompatActivity.findViewById(AppCompatActivity.java:223)
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|
42
|
-
|
|
43
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-
at com.example.esp32ble.MainActivity.setTextName(MainActivity.java:1
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|
29
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+
at com.example.esp32ble.MainActivity.setTextName(MainActivity.java:174)
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44
30
|
|
|
45
31
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at com.example.esp32ble.SubsidyBle.scanAndConnect(SubsidyBle.java:121)
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46
32
|
|
|
47
|
-
at com.example.esp32ble.MainActivity.chartChange(MainActivity.java:1
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33
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+
at com.example.esp32ble.MainActivity.chartChange(MainActivity.java:160)
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48
34
|
|
|
49
35
|
at com.example.esp32ble.-$$Lambda$TW4Z-_TbHlSaQ3_9pMVQ_fCEm0w.onClick(Unknown Source:2)
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50
36
|
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@@ -70,6 +56,8 @@
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70
56
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71
57
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at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1055)
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|
72
58
|
|
|
59
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+
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60
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+
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73
61
|
```
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74
62
|
|
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75
63
|
|
1
onCreateにfindViewByIdの移動をしTextViewのnameTextをグローバル変数にした
test
CHANGED
|
File without changes
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test
CHANGED
|
@@ -92,6 +92,8 @@
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|
92
92
|
|
|
93
93
|
private Button changeButton;
|
|
94
94
|
|
|
95
|
+
private TextView nameText;
|
|
96
|
+
|
|
95
97
|
private final String NOW_CONNECT = "接続を終了";
|
|
96
98
|
|
|
97
99
|
private final String NOW_DISCONNECT = "接続を開始";
|
|
@@ -134,7 +136,9 @@
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134
136
|
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|
135
137
|
changeButton.setOnClickListener(this::chartChange);
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|
136
138
|
|
|
137
|
-
|
|
139
|
+
nameText = findViewById(R.id.device_name_text);
|
|
140
|
+
|
|
141
|
+
|
|
138
142
|
|
|
139
143
|
lineChart();
|
|
140
144
|
|
|
@@ -196,8 +200,6 @@
|
|
|
196
200
|
|
|
197
201
|
Log.d("kiteru?",deviceName);
|
|
198
202
|
|
|
199
|
-
TextView nameText = findViewById(R.id.device_name_text);
|
|
200
|
-
|
|
201
203
|
nameText.setText(deviceName);
|
|
202
204
|
|
|
203
205
|
}
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