private void init() {  
ListenerCollector collector = new ListenerCollector();  
collector.setListener(this, mListener);  
}  

$ adb shell dumpsys batterystats > xxx.txt  //µÃµ½Õû¸öÉ豸µÄµçÁ¿ÏûºÄÐÅÏ¢
$ adb shell dumpsys batterystats > com.package.name > xxx.txt //µÃµ½Ö¸¶¨appÏà¹ØµÄµçÁ¿ÏûºÄÐÅÏ¢

$ python historian.py xxx.txt > xxx.html

// It is very easy to subscribe to changes to the battery state, but you can get the current  
// state by simply passing null in as your receiver.  Nifty, isn't that?  
IntentFilter filter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);  
Intent batteryStatus = this.registerReceiver(null, filter);  
int chargePlug = batteryStatus.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);  
boolean acCharge = (chargePlug == BatteryManager.BATTERY_PLUGGED_AC);  
if (acCharge) {  
    Log.v(LOG_TAG,¡°The phone is charging!¡±);  
}  

/** 
 * This method checks for power by comparing the current battery state against all possible 
 * plugged in states. In this case, a device may be considered plugged in either by USB, AC, or 
 * wireless charge. (Wireless charge was introduced in API Level 17.) 
 */  
private boolean checkForPower() {  
    // It is very easy to subscribe to changes to the battery state, but you can get the current  
    // state by simply passing null in as your receiver.  Nifty, isn't that?  
    IntentFilter filter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);  
    Intent batteryStatus = this.registerReceiver(null, filter);  
  
    // There are currently three ways a device can be plugged in. We should check them all.  
    int chargePlug = batteryStatus.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);  
    boolean usbCharge = (chargePlug == BatteryManager.BATTERY_PLUGGED_USB);  
    boolean acCharge = (chargePlug == BatteryManager.BATTERY_PLUGGED_AC);  
    boolean wirelessCharge = false;  
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {  
        wirelessCharge = (chargePlug == BatteryManager.BATTERY_PLUGGED_WIRELESS);  
    }  
    return (usbCharge || acCharge || wirelessCharge);  
}  

public class MyJobService extends JobService {  
    private static final String LOG_TAG = "MyJobService";  
  
    @Override  
    public void onCreate() {  
        super.onCreate();  
        Log.i(LOG_TAG, "MyJobService created");  
    }  
  
    @Override  
    public void onDestroy() {  
        super.onDestroy();  
        Log.i(LOG_TAG, "MyJobService destroyed");  
    }  
  
    @Override  
    public boolean onStartJob(JobParameters params) {  
        // This is where you would implement all of the logic for your job. Note that this runs  
        // on the main thread, so you will want to use a separate thread for asynchronous work  
        // (as we demonstrate below to establish a network connection).  
        // If you use a separate thread, return true to indicate that you need a "reschedule" to  
        // return to the job at some point in the future to finish processing the work. Otherwise,  
        // return false when finished.  
        Log.i(LOG_TAG, "Totally and completely working on job " + params.getJobId());  
        // First, check the network, and then attempt to connect.  
        if (isNetworkConnected()) {  
            new SimpleDownloadTask() .execute(params);  
            return true;  
        } else {  
            Log.i(LOG_TAG, "No connection on job " + params.getJobId() + "; sad face");  
        }  
        return false;  
    }  
  
    @Override  
public boolean onStopJob(JobParameters params) {  
        // Called if the job must be stopped before jobFinished() has been called. This may  
        // happen if the requirements are no longer being met, such as the user no longer  
        // connecting to WiFi, or the device no longer being idle. Use this callback to resolve  
        // anything that may cause your application to misbehave from the job being halted.  
        // Return true if the job should be rescheduled based on the retry criteria specified  
        // when the job was created or return false to drop the job. Regardless of the value  
        // returned, your job must stop executing.  
        Log.i(LOG_TAG, "Whelp, something changed, so I'm calling it on job " + params.getJobId());  
        return false;  
    }  
  
    /** 
     * Determines if the device is currently online. 
     */  
    private boolean isNetworkConnected() {  
        ConnectivityManager connectivityManager =  
                (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);  
        NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();  
        return (networkInfo != null && networkInfo.isConnected());  
    }  
  
    /** 
     *  Uses AsyncTask to create a task away from the main UI thread. This task creates a 
     *  HTTPUrlConnection, and then downloads the contents of the webpage as an InputStream. 
     *  The InputStream is then converted to a String, which is logged by the 
     *  onPostExecute() method. 
     */  
    private class SimpleDownloadTask extends AsyncTask<JobParameters, Void, String> {  
  
        protected JobParameters mJobParam;  
  
        @Override  
        protected String doInBackground(JobParameters... params) {  
            // cache system provided job requirements  
            mJobParam = params[0];  
            try {  
                InputStream is = null;  
                // Only display the first 50 characters of the retrieved web page content.  
                int len = 50;  
  
                URL url = new URL("https://www.google.com");  
                HttpURLConnection conn = (HttpURLConnection) url.openConnection();  
                conn.setReadTimeout(10000); //10sec  
                conn.setConnectTimeout(15000); //15sec  
                conn.setRequestMethod("GET");  
                //Starts the query  
                conn.connect();  
                int response = conn.getResponseCode();  
                Log.d(LOG_TAG, "The response is: " + response);  
                is = conn.getInputStream();  
  
                // Convert the input stream to a string  
                Reader reader = null;  
                reader = new InputStreamReader(is, "UTF-8");  
                char[] buffer = new char[len];  
                reader.read(buffer);  
                return new String(buffer);  
  
            } catch (IOException e) {  
                return "Unable to retrieve web page.";  
            }  
        }  
  
        @Override  
        protected void onPostExecute(String result) {  
            jobFinished(mJobParam, false);  
            Log.i(LOG_TAG, result);  
        }  
    }      }  

public class FreeTheWakelockActivity extends ActionBarActivity {  
    public static final String LOG_TAG = "FreeTheWakelockActivity";  
  
    TextView mWakeLockMsg;  
    ComponentName mServiceComponent;  
  
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_wakelock);  
  
        mWakeLockMsg = (TextView) findViewById(R.id.wakelock_txt);  
        mServiceComponent = new ComponentName(this, MyJobService.class);  
        Intent startServiceIntent = new Intent(this, MyJobService.class);  
        startService(startServiceIntent);  
  
        Button theButtonThatWakelocks = (Button) findViewById(R.id.wakelock_poll);  
        theButtonThatWakelocks.setText(R.string.poll_server_button);  
  
        theButtonThatWakelocks.setOnClickListener(new View.OnClickListener() {  
            @Override  
            public void onClick(View v) {  
                    pollServer();  
            }  
        });  
    }  
  
    /** 
     * This method polls the server via the JobScheduler API. By scheduling the job with this API, 
     * your app can be confident it will execute, but without the need for a wake lock. Rather, the 
     * API will take your network jobs and execute them in batch to best take advantage of the 
     * initial network connection cost. 
     * 
     * The JobScheduler API works through a background service. In this sample, we have 
     * a simple service in MyJobService to get you started. The job is scheduled here in 
     * the activity, but the job itself is executed in MyJobService in the startJob() method. For 
     * example, to poll your server, you would create the network connection, send your GET 
     * request, and then process the response all in MyJobService. This allows the JobScheduler API 
     * to invoke your logic without needed to restart your activity. 
     * 
     * For brevity in the sample, we are scheduling the same job several times in quick succession, 
     * but again, try to consider similar tasks occurring over time in your application that can 
     * afford to wait and may benefit from batching. 
     */  
    public void pollServer() {  
        JobScheduler scheduler = (JobScheduler) getSystemService(Context.JOB_SCHEDULER_SERVICE);  
        for (int i=0; i<10; i++) {  
            JobInfo jobInfo = new JobInfo.Builder(i, mServiceComponent)  
                    .setMinimumLatency(5000) // 5 seconds  
                    .setOverrideDeadline(60000) // 60 seconds (for brevity in the sample)  
                    .setRequiredNetworkType(JobInfo.NETWORK_TYPE_ANY) // WiFi or data connections  
                    .build();  
  
            mWakeLockMsg.append("Scheduling job " + i + "!\n");  
            scheduler.schedule(jobInfo);  
        }  
    }  
}