下面是一个示例解决方案,其中包含了一个Android应用程序,用于扫描BLE信标并显示其内容。
首先,在AndroidManifest.xml文件中添加以下权限:
然后,创建一个新的MainActivity.java文件,并添加以下代码:
import android.Manifest;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothManager;
import android.bluetooth.le.BluetoothLeScanner;
import android.bluetooth.le.ScanCallback;
import android.bluetooth.le.ScanResult;
import android.content.Context;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.Toast;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private static final int REQUEST_ENABLE_BT = 1;
private static final int REQUEST_FINE_LOCATION = 2;
private static final String TAG = "BLE_Scanner";
private BluetoothAdapter mBluetoothAdapter;
private BluetoothLeScanner mBluetoothLeScanner;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 检查设备是否支持BLE
if (!getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE)) {
Toast.makeText(this, "BLE not supported", Toast.LENGTH_SHORT).show();
finish();
}
// 获取BluetoothAdapter
BluetoothManager bluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
mBluetoothAdapter = bluetoothManager.getAdapter();
// 检查蓝牙是否已启用
if (mBluetoothAdapter == null || !mBluetoothAdapter.isEnabled()) {
Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
} else {
checkLocationPermission();
}
}
private void checkLocationPermission() {
// 检查位置权限(需要Android 6.0及以上版本)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, REQUEST_FINE_LOCATION);
return;
}
}
// 开始BLE扫描
startBleScan();
}
private void startBleScan() {
// 获取BluetoothLeScanner
mBluetoothLeScanner = mBluetoothAdapter.getBluetoothLeScanner();
// 开始BLE扫描
mBluetoothLeScanner.startScan(mScanCallback);
}
private void stopBleScan() {
// 停止BLE扫描
mBluetoothLeScanner.stopScan(mScanCallback);
}
private ScanCallback mScanCallback = new ScanCallback() {
@Override
public void onScanResult(int callbackType, ScanResult result) {
super.onScanResult(callbackType, result);
BluetoothDevice device = result.getDevice();
byte[] scanRecord = result.getScanRecord().getBytes();
// 在这里处理扫描结果
Log.d(TAG, "Device Name: " + device.getName());
Log.d(TAG, "Device Address: " + device.getAddress());
Log.d(TAG, "Scan Record: " + bytesToHex(scanRecord));
}
@Override
public void onBatchScanResults(List results) {
super.onBatchScanResults(results);
// 在这里处理批量扫描结果
}
@Override
public void onScanFailed(int errorCode) {
super.onScanFailed(errorCode);
// 扫描失败处理
}
};
@Override
protected void onDestroy() {
super.onDestroy();
stopBleScan();
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode == REQUEST_FINE_LOCATION) {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
startBleScan();
} else {
Toast.makeText(this, "Location permission required", Toast.LENGTH_SHORT).show();
finish();
}
}
}
private static final char[] HEX_ARRAY = "0123456789ABCDEF".