Android Studio 实现一款可以实时获取GPS信号强度以及经纬度并在textview中展示的app

可以使用 LocationManager 和 LocationListener 来实现获取 GPS 信号强度和经纬度的功能。以下是一个简单的示例代码：

public class MainActivity extends AppCompatActivity implements LocationListener {

    private TextView mTextView;
    private LocationManager mLocationManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mTextView = findViewById(R.id.text_view);

        mLocationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1);
        } else {
            mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == 1 && grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);
        }
    }

    @Override
    public void onLocationChanged(Location location) {
        double latitude = location.getLatitude();
        double longitude = location.getLongitude();
        float accuracy = location.getAccuracy();

        String text = "Latitude: " + latitude + "\nLongitude: " + longitude + "\nAccuracy: " + accuracy;
        mTextView.setText(text);
    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
    }

    @Override
    public void onProviderEnabled(String provider) {
    }

    @Override
    public void onProviderDisabled(String provider) {
    }
}

在 AndroidManifest.xml 文件中添加以下权限：

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

这样就可以实现一个可以实时获取 GPS 信号强度和经纬度并在 TextView 中展示的 Android 应用了。