java - 用于模拟 Android 传感器的 openintents 的替代方案

Question

我正在为 Android 移动设备开发一个可扩展的传感和数据处理框架。它将支持通过 Android 移动设备访问各种数据信号(例如，温度、电池、压力、wifi 信号强度等)。

为了测试传感器，我在我的 Android 设备上部署了我编写的 Android 代码。在这里，限制来了---我的安卓设备有一组有限的传感器(例如，它没有温度传感器)所以，我无法测试所有类型传感器(例如，温度、压力等)的所有编写代码。

在互联网上，我检查了SensorSimulator 项目()，但它对我不起作用。我收到以下错误。

05-03 01:40:40.766: E/AndroidRuntime(10139): FATAL EXCEPTION: main
05-03 01:40:40.766: E/AndroidRuntime(10139): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.helloworldsensorsimulator/com.example.helloworldsensorsimulator.MainActivity}: android.os.NetworkOnMainThreadException
05-03 01:40:40.766: E/AndroidRuntime(10139):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2121)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2146)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at android.app.ActivityThread.access$700(ActivityThread.java:140)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1238)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at android.os.Handler.dispatchMessage(Handler.java:99)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at android.os.Looper.loop(Looper.java:177)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at android.app.ActivityThread.main(ActivityThread.java:4947)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at java.lang.reflect.Method.invokeNative(Native Method)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at java.lang.reflect.Method.invoke(Method.java:511)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at dalvik.system.NativeStart.main(Native Method)
05-03 01:40:40.766: E/AndroidRuntime(10139): Caused by: android.os.NetworkOnMainThreadException
05-03 01:40:40.766: E/AndroidRuntime(10139):    at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1118)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at libcore.io.IoBridge.connectErrno(IoBridge.java:127)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at libcore.io.IoBridge.connect(IoBridge.java:112)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at java.net.Socket.startupSocket(Socket.java:566)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at java.net.Socket.tryAllAddresses(Socket.java:127)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at java.net.Socket.<init>(Socket.java:177)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at java.net.Socket.<init>(Socket.java:149)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at org.openintents.sensorsimulator.hardware.SensorSimulatorClient.connect(SensorSimulatorClient.java:116)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at org.openintents.sensorsimulator.hardware.SensorManagerSimulator.connectSimulator(SensorManagerSimulator.java:220)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at com.example.helloworldsensorsimulator.MainActivity.onCreate(MainActivity.java:37)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at android.app.Activity.performCreate(Activity.java:5207)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
05-03 01:40:40.766: E/AndroidRuntime(10139):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2085)
05-03 01:40:40.766: E/AndroidRuntime(10139):    ... 11 more

我写了如下代码，网站上建议通过Java Project连接SensorSimulator。 AndroidManifest 文件包含

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


import org.openintents.sensorsimulator.hardware.Sensor;
import org.openintents.sensorsimulator.hardware.SensorEvent;
import org.openintents.sensorsimulator.hardware.SensorEventListener;
import org.openintents.sensorsimulator.hardware.SensorManagerSimulator;

public class MainActivity extends Activity {

    private SensorManagerSimulator mSensorManager;

    private SensorEventListener mEventListenerAccelerometer;
    private SensorEventListener mEventListenerGravity;
    private SensorEventListener mEventListenerLinearAcceleration;
    private SensorEventListener mEventListenerLight;
    private SensorEventListener mEventListenerTemperature;
    private SensorEventListener mEventListenerOrientation;
    private SensorEventListener mEventListenerMagneticField;
    private SensorEventListener mEventListenerPressure;
    private SensorEventListener mEventListenerRotationVector;
    private SensorEventListener mEventListenerBarcode;

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

        mSensorManager = SensorManagerSimulator.getSystemService(this,
                SENSOR_SERVICE);

        mSensorManager.connectSimulator();


        initListeners();
    }

    private void initListeners() {
        mEventListenerAccelerometer = new SensorEventListener() {

            @Override
            public void onSensorChanged(SensorEvent event) {
                float[] values = event.values;
                System.out.println("Accelerometer: " + values[0]
                        + ", " + values[1] + ", " + values[2]);
                /*mTextViewAccelerometer.setText("Accelerometer: " + values[0]
                        + ", " + values[1] + ", " + values[2]);*/
            }

            @Override
            public void onAccuracyChanged(Sensor sensor, int accuracy) {
            }
        };
        mEventListenerLinearAcceleration = new SensorEventListener() {

            @Override
            public void onSensorChanged(SensorEvent event) {
                float[] values = event.values;
                System.out.println("Linear Acceleration: "
                        + values[0] + ", " + values[1] + ", " + values[2]);
                /*mTextViewLinearAcceleration.setText("Linear Acceleration: "
                        + values[0] + ", " + values[1] + ", " + values[2]);*/
            }

            @Override
            public void onAccuracyChanged(Sensor sensor, int accuracy) {
            }
        };
        mEventListenerGravity = new SensorEventListener() {

            @Override
            public void onSensorChanged(SensorEvent event) {
                float[] values = event.values;
                System.out.println("Gravity: " + values[0] + ", "
                        + values[1] + ", " + values[2]);
                /*mTextViewGravity.setText("Gravity: " + values[0] + ", "
                        + values[1] + ", " + values[2]);*/
            }

            @Override
            public void onAccuracyChanged(Sensor sensor, int accuracy) {
            }
        };
        mEventListenerMagneticField = new SensorEventListener() {

            @Override
            public void onSensorChanged(SensorEvent event) {
                float[] values = event.values;

                System.out.println("Compass: " + values[0] + ", "
                        + values[1] + ", " + values[2]);
                /*mTextViewMagneticField.setText("Compass: " + values[0] + ", "
                        + values[1] + ", " + values[2]);
*/          }

            @Override
            public void onAccuracyChanged(Sensor sensor, int accuracy) {
            }
        };
        mEventListenerOrientation = new SensorEventListener() {

            @Override
            public void onSensorChanged(SensorEvent event) {
                float[] values = event.values;
                System.out.println("Orientation: " + values[0] + ", "
                        + values[1] + ", " + values[2]);
                /*mTextViewOrientation.setText("Orientation: " + values[0] + ", "
                        + values[1] + ", " + values[2]);*/
            }

            @Override
            public void onAccuracyChanged(Sensor sensor, int accuracy) {
            }
        };
        mEventListenerTemperature = new SensorEventListener() {

            @Override
            public void onSensorChanged(SensorEvent event) {
                float[] values = event.values;
                System.out.println("Temperature: " + values[0]);
                //mTextViewTemperature.setText("Temperature: " + values[0]);
            }

            @Override
            public void onAccuracyChanged(Sensor sensor, int accuracy) {
            }
        };
        mEventListenerLight = new SensorEventListener() {

            @Override
            public void onSensorChanged(SensorEvent event) {
                float[] values = event.values;
                System.out.println("Light: " + values[0]);
                //mTextViewLight.setText("Light: " + values[0]);
            }

            @Override
            public void onAccuracyChanged(Sensor sensor, int accuracy) {
            }
        };
        mEventListenerPressure = new SensorEventListener() {

            @Override
            public void onSensorChanged(SensorEvent event) {
                float[] values = event.values;
                System.out.println("Pressure: " + values[0]);
                //mTextViewPressure.setText("Pressure: " + values[0]);
            }

            @Override
            public void onAccuracyChanged(Sensor sensor, int accuracy) {
            }
        };
        mEventListenerRotationVector = new SensorEventListener() {

            @Override
            public void onSensorChanged(SensorEvent event) {
                float[] values = event.values;
                System.out.println("RotationVector: " + values[0]
                        + ", " + values[1] + ", " + values[2]);
            /*  mTextViewRotationVector.setText("RotationVector: " + values[0]
                        + ", " + values[1] + ", " + values[2]);*/
            }

            @Override
            public void onAccuracyChanged(Sensor sensor, int accuracy) {
            }
        };

        mEventListenerBarcode = new SensorEventListener() {

            @Override
            public void onSensorChanged(SensorEvent event) {
                System.out.println("Barcode: " + event.barcode);
                //mTextViewBarcode.setText("Barcode: " + event.barcode);
            }

            @Override
            public void onAccuracyChanged(Sensor sensor, int accuracy) {
            }
        };
    }

    @Override
    protected void onResume() {
        super.onResume();
    /*  mSensorManager.registerListener(mEventListenerAccelerometer,
                mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
                SensorManager.SENSOR_DELAY_FASTEST);
        mSensorManager.registerListener(mEventListenerLinearAcceleration,
                mSensorManager
                        .getDefaultSensor(Sensor.TYPE_LINEAR_ACCELERATION),
                SensorManager.SENSOR_DELAY_FASTEST);
        mSensorManager.registerListener(mEventListenerGravity,
                mSensorManager.getDefaultSensor(Sensor.TYPE_GRAVITY),
                SensorManager.SENSOR_DELAY_FASTEST);
        mSensorManager.registerListener(mEventListenerMagneticField,
                mSensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD),
                SensorManager.SENSOR_DELAY_FASTEST);
        mSensorManager.registerListener(mEventListenerOrientation,
                mSensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION),
                SensorManager.SENSOR_DELAY_FASTEST);*/
        mSensorManager.registerListener(mEventListenerTemperature,
                mSensorManager.getDefaultSensor(Sensor.TYPE_TEMPERATURE),
                SensorManager.SENSOR_DELAY_FASTEST);
        /*mSensorManager.registerListener(mEventListenerLight,
                mSensorManager.getDefaultSensor(Sensor.TYPE_LIGHT),
                SensorManager.SENSOR_DELAY_FASTEST);
        mSensorManager.registerListener(mEventListenerPressure,
                mSensorManager.getDefaultSensor(Sensor.TYPE_PRESSURE),
                SensorManager.SENSOR_DELAY_FASTEST);
        mSensorManager.registerListener(mEventListenerBarcode,
                mSensorManager.getDefaultSensor(Sensor.TYPE_BARCODE_READER),
                SensorManager.SENSOR_DELAY_FASTEST);
        mSensorManager.registerListener(mEventListenerRotationVector,
                mSensorManager.getDefaultSensor(Sensor.TYPE_ROTATION_VECTOR),
                SensorManager.SENSOR_DELAY_FASTEST);*/
    }

    @Override
    protected void onStop() {
        /*mSensorManager.unregisterListener(mEventListenerAccelerometer);
        mSensorManager.unregisterListener(mEventListenerLinearAcceleration);
        mSensorManager.unregisterListener(mEventListenerGravity);
        mSensorManager.unregisterListener(mEventListenerMagneticField);
        mSensorManager.unregisterListener(mEventListenerOrientation);*/
        mSensorManager.unregisterListener(mEventListenerTemperature);
        /*mSensorManager.unregisterListener(mEventListenerLight);
        mSensorManager.unregisterListener(mEventListenerPressure);
        mSensorManager.unregisterListener(mEventListenerRotationVector);
        mSensorManager.unregisterListener(mEventListenerBarcode);*/
        super.onStop();
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}

Answer 1

调用 SensorManager.connectSimulator() 构成网络操作，如您的堆栈跟踪所示。因此，您正试图在应用程序的主线程上执行网络操作。默认情况下，Android 不允许这样做，因此您有两个选择。

1. 使用另一个线程或async task . AsyncTask 语法和使用约定可能有点困惑，所以这里有一个例子:AsyncTask Android example .
2. Turn off strict mode (不推荐)。