android - 获取电池状态服务并将其发送到磨损模块时出错

Question

在我的 android wear 项目中...我正在尝试获取手机的电池状态并将其发送到 Wear 设备...所以我尝试运行一个将在后台运行的服务并在操作 ACTION_BATTERY_CHANGED 上注册一个 BroadcastReceiver ..onReceive 它会将味精发送到佩戴设备..但我遇到的问题是我的电池状态更改广播接收器无法正常工作，它只能通过第一次登录，然后它没有在电池状态更改时运行，请帮助我解决这个问题....以下是我的服务代码....

BatteryStatService.java

package com.rahul.androidwear;

import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.BatteryManager;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.wearable.DataApi;
import com.google.android.gms.wearable.DataMap;
import com.google.android.gms.wearable.PutDataMapRequest;
import com.google.android.gms.wearable.PutDataRequest;
import com.google.android.gms.wearable.Wearable;

import java.util.Date;

public class BatteryStatService extends Service  implements GoogleApiClient.ConnectionCallbacks,
        GoogleApiClient.OnConnectionFailedListener  {

    GoogleApiClient googleClient;


    public BatteryStatService() {
    }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO: Return the communication channel to the service.
        throw new UnsupportedOperationException("Not yet implemented");
    }


    @Override
    public void onCreate() {
        super.onCreate();

        // Build a new GoogleApiClient
        googleClient = new GoogleApiClient.Builder(this)
                .addApi(Wearable.API)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .build();



        //Register Reciver
        final IntentFilter battChangeFilter = new IntentFilter(
                Intent.ACTION_BATTERY_CHANGED);
        // register our receiver
        this.registerReceiver(this.batteryChangeReceiver, battChangeFilter);
        Log.e("service", "broadcast receiver registered");


    }

    @Override
    public void onStart(Intent intent, int startId) {
        super.onStart(intent, startId);
        googleClient.connect();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();

        if (null != googleClient && googleClient.isConnected()) {
            googleClient.disconnect();
        }
        Log.e("service", "okwear disconnected");

    }

    @Override
    public void onConnected(Bundle bundle) {

        String WEARABLE_DATA_PATH = "/wearable_data";

        // Create a DataMap object and send it to the data layer
        DataMap dataMap = new DataMap();
        dataMap.putLong("time", new Date().getTime());
        dataMap.putString("hole", "1");
        dataMap.putString("front", "250");
        dataMap.putString("middle", "260");
        dataMap.putString("back", "270");
        //Requires a new thread to avoid blocking the UI
        new SendToDataLayerThread(WEARABLE_DATA_PATH, dataMap).start();

    }

    @Override
    public void onConnectionSuspended(int i) {

    }

    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {

        Log.e("Mobile","Failed to connect   Error::"+connectionResult.getErrorMessage());

    }



    private final BroadcastReceiver batteryChangeReceiver = new BroadcastReceiver() {

        @Override
        public void onReceive(final Context context, final Intent intent) {
            checkBatteryLevel(intent);
            Log.e("service","broadcast receiver called");
        }
    };


    private void checkBatteryLevel(Intent batteryChangeIntent) {
        // some calculations
        final int currLevel = batteryChangeIntent.getIntExtra(
                BatteryManager.EXTRA_LEVEL, -1);
        final int maxLevel = batteryChangeIntent.getIntExtra(
                BatteryManager.EXTRA_SCALE, -1);
        final int percentage = (int) Math.round((currLevel * 100.0) / maxLevel);

        Log.d("MySerive", "current battery level: " + percentage);



        unregisterReceiver(batteryChangeReceiver);
        //return  percentage;
    }


    class SendToDataLayerThread extends Thread {
        String path;
        DataMap dataMap;

        // Constructor for sending data objects to the data layer
        SendToDataLayerThread(String p, DataMap data) {
            path = p;
            dataMap = data;
        }

        public void run() {
            // Construct a DataRequest and send over the data layer
            PutDataMapRequest putDMR = PutDataMapRequest.create(path);
            putDMR.getDataMap().putAll(dataMap);
            PutDataRequest request = putDMR.asPutDataRequest();
            DataApi.DataItemResult result = Wearable.DataApi.putDataItem(googleClient, request).await();
            if (result.getStatus().isSuccess()) {
                Log.v("myTag", "DataMap: " + dataMap + " sent successfully to data layer ");
            } else {
                // Log an error
                Log.v("myTag", "ERROR: failed to send DataMap to data layer");
            }
        }
    }


}

提前致谢...