显示选定的传感器值列表视图实时

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问题描述

我要创建哪些具有以下功能的应用程序。

I'm creating an application which has following functionality.

用户选择它们是在设备中可用的传感器。

的UI显示所选传感器名称和读数在ListView。（值更新实时）

我有一个自定义类来存储传感器数据（检测数据）和自定义视图来显示传感器名称和读数。

I have a custom class to store sensor data (SenseData) and custom view to display sensor name and readings.

我写了一个自定义的适配器类需要检测数据的列表，在我的活动来填充列表视图组件。

I wrote a custom Adaptor class which takes a list of SenseData to populate a list view component in my activity.

我想要做的就是，拿检测数据的列表。

What I want to do is, take a list of SenseData.

我想这一个星期左右，并没有得到任何的解决方案。
我会很感激，如果有人可以给我一个提示。

I'm trying this for about a week and didn't get any solutions.I'll be very grateful if someone can give me a hint.

编辑：

适配器类

public class SensorAdaptor extends BaseAdapter{

Context context;
List<SenseData> senseData;

public SensorAdaptor(Context context, List<SenseData> senseData){
    this.context = context;
    this.senseData = senseData;
}

@Override
public int getCount() {
    return senseData.size();
}

@Override
public Object getItem(int position) {
    return senseData.get(position);
}

@Override
public long getItemId(int position) {
    return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    ViewHolder holder;

    LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View view;

    if(convertView == null){
        view = inflater.inflate(R.layout.view_sensor, parent, false);
        holder = new ViewHolder();
        holder.name = (TextView) view.findViewById(R.id.senseName);
        holder.data = (TextView) view.findViewById(R.id.senseReading);
        view.setTag(holder);
    }else{
        view = convertView;
        holder = (ViewHolder) view.getTag();
    }

    SenseData data = senseData.get(position);
    holder.name.setText(data.getSensorName());
    holder.data.setText(data.getSensorValues());
    return null;
}

public class ViewHolder{
    TextView name;
    TextView data;
}
}

onSensorChanged方法

    @Override
public void onSensorChanged(SensorEvent event) {
    this.event = event;
//SupportedSensors contains the predefined sensor types. sensor is a SenseData type object
    Intent filter = new Intent(new 
SupportedSensors().getType(event.sensor.getType()));
    filter.putExtra("value", event.values[0]);
    ctx.sendBroadcast(filter); //ctx is the context
}

然后我收到的广播与具有传感器的名称作为行动的过滤器。但我无法找到一个方法来返回广播接收器的列表。检测数据类具有getter和setter方法来设置和获取数据。

Then I receive broadcasts with filters which have sensor names as action. But I couldn't find out a way to return a list in Broadcast receiver. SenseData class has setters and getters to set and get data.

public class SensorBroadcastReceiver extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {

    switch(intent.getAction()){
        case "accelerometer":
            System.out.println("Accelerometer");
            break;
        case "gyroscope":
            System.out.println("Gyroscope");
            break;
        case "gravity":
            System.out.println("Gravity");
            break;
        case "proximity":
            System.out.println("Proximity");
            break;
        case "pressure":
            System.out.println("Pressure");
            break;
        case "light":
            System.out.println("Light");
            break;
        case "magnetometer":
            System.out.println("Magnetometer");
            break;
        case "rotation":
            System.out.println("Rotation Vector");
            break;
    }

}

的接收机被登记在活动

The receiver is registered in the Activity

    IntentFilter filter = new IntentFilter("accelerometer");
    SensorBroadcastReceiver receiver = new SensorBroadcastReceiver();
    registerReceiver(receiver, filter);

我可以添加列表与LT;检测数据＆GT; sensordatalist 到 SensorBroadcastReceiver 但如何获取值实时？

非常感谢你。

推荐答案

我能够通过以下方法来解决我的问题....

I was able to solve my problem by using the following method....

创建类 RealTimeSensorReader 它读取传感器。

public void onSensorChanged(SensorEvent event) {

RealTimeSensor realTimeSensor = new RealTimeSensor();
realTimeSensor.setName(AvailableSensors.getType(event.sensor.getType()).toUpperCase());
realTimeSensor.setValueX(event.values[0]+"");
realTimeSensor.setValueY(event.values[1]+"");
realTimeSensor.setValueZ(event.values[2]+"");

System.out.println(values);

TempStore.sensor.put(AvailableSensors.getType(event.sensor.getType()), realTimeSensor);

Intent intent = new Intent();
intent.setAction("sensor");
context.sendBroadcast(intent);

adaptor.notifyDataSetChanged();}

定义一个单独的类 TempStore 其中包含两个静态字段
一个的ConcurrentHashMap 和的LinkedList 这是店里传感器
数据并分别填充的ListView。

Define a separate class TempStore which contains two static fieldsa ConcurrentHashMap and a LinkedList which are for store sensordata and to populate the ListView separately.

public class TempStore {

public static ConcurrentMap<String, RealTimeSensor> sensor = new ConcurrentHashMap<>();
public static ArrayList<RealTimeSensor> realTimeSensors = new ArrayList<>();

在onSensorChanged方法，我把传感器值与传感器
命名为关键，以HashMap中。并发送一个广播，只要一
传感器被改变。

In onSensorChanged method I put the sensor values with the sensorname as the key to the HashMap. And send a broadcast whenever asensor is changed.

创建了一个广播监听器，听的广播，并
清除当前LinkedList的值，并添加设置的值
HashMap中。

Created a broadcast listener which listen to that broadcast, andclear the current LinkedList values and add the values set of theHashMap.

TempStore.realTimeSensors.clear();
TempStore.realTimeSensors.addAll(TempStore.sensor.values());

我需要知道的是，这种方法是正确的还是错误的。

What I need to know is whether this method is correct or wrong.

非常感谢你。

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