基于Android studio 设计一款电子秤软件程序,包含连接蓝牙模块,电子秤模块,去皮称重功能及正常电子秤功能等,给出详细步骤的代码
时间: 2024-04-30 11:25:20 浏览: 11
这是一个比较复杂的项目,需要涉及到蓝牙连接和电子秤模块的使用,以下是一些大致的步骤和代码示例:
1. 创建一个新的Android Studio项目并添加蓝牙权限和重量传感器权限。
2. 在布局文件中添加一个TextView和一个Button用于显示重量和连接蓝牙设备。
3. 在MainActivity.java中添加以下代码:
```java
public class MainActivity extends AppCompatActivity {
private TextView weightTextView;
private Button connectButton;
private BluetoothAdapter bluetoothAdapter;
private BluetoothSocket bluetoothSocket;
private InputStream inputStream;
private OutputStream outputStream;
private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
weightTextView = (TextView) findViewById(R.id.weightTextView);
connectButton = (Button) findViewById(R.id.connectButton);
bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
connectButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (!bluetoothAdapter.isEnabled()) {
Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableIntent, 0);
} else {
connectToDevice();
}
}
});
}
private void connectToDevice() {
BluetoothDevice device = bluetoothAdapter.getRemoteDevice("00:11:22:33:44:55"); // Replace with your device's address
try {
bluetoothSocket = device.createRfcommSocketToServiceRecord(MY_UUID);
bluetoothSocket.connect();
inputStream = bluetoothSocket.getInputStream();
outputStream = bluetoothSocket.getOutputStream();
startReading();
} catch (IOException e) {
e.printStackTrace();
}
}
private void startReading() {
new Thread(new Runnable() {
@Override
public void run() {
byte[] buffer = new byte[1024];
int bytes;
while (true) {
try {
bytes = inputStream.read(buffer);
String weight = new String(buffer, 0, bytes);
runOnUiThread(new Runnable() {
@Override
public void run() {
weightTextView.setText(weight);
}
});
} catch (IOException e) {
e.printStackTrace();
return;
}
}
}
}).start();
}
@Override
protected void onDestroy() {
super.onDestroy();
try {
bluetoothSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
```
这段代码主要实现了连接蓝牙设备并读取重量数据的功能,其中“00:11:22:33:44:55”需要替换成你的设备的蓝牙地址。
4. 在AndroidManifest.xml文件中添加以下权限:
```xml
<uses-permission android:name="android.permission.BLUETOOTH"/>
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.WAKE_LOCK"/>
```
5. 运行程序并连接蓝牙设备,你应该能够看到重量数据显示在TextView中。
6. 接下来,我们需要添加去皮称重功能。在布局文件中添加一个EditText和一个Button用于输入去皮重量和去皮操作。
7. 在MainActivity.java中添加以下代码:
```java
private EditText tareEditText;
private Button tareButton;
private int tareWeight = 0;
tareEditText = (EditText) findViewById(R.id.tareEditText);
tareButton = (Button) findViewById(R.id.tareButton);
tareButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String tareWeightText = tareEditText.getText().toString();
if (!tareWeightText.isEmpty()) {
tareWeight = Integer.parseInt(tareWeightText);
try {
outputStream.write(("T" + tareWeight + "\n").getBytes());
} catch (IOException e) {
e.printStackTrace();
}
}
}
});
private void startReading() {
new Thread(new Runnable() {
@Override
public void run() {
byte[] buffer = new byte[1024];
int bytes;
while (true) {
try {
bytes = inputStream.read(buffer);
String weight = new String(buffer, 0, bytes);
int rawWeight = Integer.parseInt(weight.trim());
final int netWeight = rawWeight - tareWeight;
runOnUiThread(new Runnable() {
@Override
public void run() {
weightTextView.setText(Integer.toString(netWeight));
}
});
} catch (IOException e) {
e.printStackTrace();
return;
}
}
}
}).start();
}
```
这段代码主要实现了输入去皮重量并进行去皮操作的功能,并在读取重量数据时减去去皮重量。
8. 运行程序并进行去皮操作,你应该能够看到净重数据显示在TextView中。
以上就是基于Android Studio设计电子秤软件程序的大致步骤和代码示例。需要注意的是,电子秤模块的具体使用方法可能因不同型号而异,需要参考相关文档进行调试。