Question

我正在使用蓝牙聊天示例从我的Android设备上的Arduino接收一些传感器数据，因此我停用了发送数据的代码并更改了接收代码，我获得了传感器数据的完整字符串（如即：Sensordata1，Sensordata2，Sensordata3，Sensordata4，Sensordata5，），将其拆分为特定值并将其显示为ListView的聊天元素。

以下是BluetoothChatFragment中更改的代码：

        byte[] readBuf = (byte[]) msg.obj;
                // construct a string from the valid bytes in the buffer
                String readMessage = new String(readBuf, 0, msg.arg1);

                if(readMessage != null && readMessage.length() > 29) {

                    String seperateValues[] = readMessage.split(",");
                    String pressure_1 = seperateValues[0];
                    String pressure_2 = seperateValues[1];
                    String pressure_3 = seperateValues[2];
                    String pressure_4 = seperateValues[3];
                    String pressure_5 = seperateValues[4];

                    int pressure_1_int = Integer.parseInt(pressure_1);
                    int pressure_2_int = Integer.parseInt(pressure_2);
                    int pressure_3_int = Integer.parseInt(pressure_3);
                    int pressure_4_int = Integer.parseInt(pressure_4);
                    int pressure_5_int = Integer.parseInt(pressure_5);

                float pressure_1_float = (Float.parseFloat(pressure_1)) / 10;                         
                float pressure_2_float = (Float.parseFloat(pressure_2)) / 10;
                float pressure_3_float = (Float.parseFloat(pressure_3)) / 10;
                float pressure_4_float = (Float.parseFloat(pressure_4)) / 10;
                float pressure_5_float = (Float.parseFloat(pressure_5)) / 10;

                    pressure_1 = Float.toString(pressure_1_float);
                    pressure_2 = Float.toString(pressure_2_float);
                    pressure_3 = Float.toString(pressure_3_float);
                    pressure_4 = Float.toString(pressure_4_float);
                    pressure_5 = Float.toString(pressure_5_float);


          String completeString = pressure_1 + " " + 
          pressure_2 + " " + pressure_3 + " " + pressure_4 + " " + pressure_5;


                    mConversationArrayAdapter.add(completeString);
                    break;

这不是一种显示数据的真正方式，所以我想在单个TextView字段中显示5个值... 我在xml文件（fragment_bluetooth_chat.xml）中适合TextView并使用以下命令调用TextView：

TextView pressure1 = (TextView) findViewById(R.id.textView1);
TextView pressure2 = (TextView) findViewById(R.id.textView2);
TextView pressure3 = (TextView) findViewById(R.id.textView3);
TextView pressure4 = (TextView) findViewById(R.id.textView4);
TextView pressure5 = (TextView) findViewById(R.id.textView5);

但Android工作室不接受findViewById！？我的错是什么？

非常感谢你的帮助！

这是xml（fragment_bluetooth_chat.xml）：

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:orientation="vertical" >

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/Druck1"
    android:id="@+id/textView1"
    android:layout_gravity="center_horizontal"
    android:textSize="30sp"
    android:textColor="#575757" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/Druck2"
    android:id="@+id/textView2"
    android:layout_gravity="center_horizontal"
    android:textSize="30sp"
    android:textColor="#575757" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/Druck3"
    android:id="@+id/textView3"
    android:layout_gravity="center_horizontal"
    android:textSize="30sp"
    android:textColor="#575757" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/Druck4"
    android:id="@+id/textView4"
    android:layout_gravity="center_horizontal"
    android:textSize="30sp"
    android:textColor="#575757" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/Druck5"
    android:id="@+id/textView5"
    android:layout_gravity="center_horizontal"
    android:textSize="30sp"
    android:textColor="#575757" />
  </LinearLayout>

Answer 1

将TextViews添加到BluetoothChatFragment中的其他“布局视图”：

// Layout Views
private ListView mConversationView;
private EditText mOutEditText;
private Button mSendButton;
private TextView pressure1, pressure2, pressure3, pressure4, pressure5;

将TextViews绑定到'onViewCreated（）'方法中的UI元素：

@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
    mConversationView = (ListView) view.findViewById(R.id.in);
    mOutEditText = (EditText) view.findViewById(R.id.edit_text_out);
    mSendButton = (Button) view.findViewById(R.id.button_send);
    pressure1 = (TextView) view.findViewById(R.id.textView1);
    pressure2 = (TextView) view.findViewById(R.id.textView2);
    pressure3 = (TextView) view.findViewById(R.id.textView3);
    pressure4 = (TextView) view.findViewById(R.id.textView4);
    pressure5 = (TextView) view.findViewById(R.id.textView5);
}

请注意，在这种情况下，它是'查看 .findViewById（）'。

蓝牙聊天示例 - 将接收的数据显示给TextView

1 个答案: