Android中电池信息（Battery information）的取得

这里介绍电池信息的取得.    Android.content.BroadcastReceiver类    android.os.BatteryManager类
● 电池信息的取得，调用registerReceiver（）方法。         第1个参数，设置BroadcastReceiver实例         第2个参数，设置追加了Intent.ACTION_BATTERY_CHANGED处理的IntentFilter实例。● 在BroadcastReceiver的onReceive（）事件，接收到的Intent.ACTION_BATTERY_CHANGED，包括下面的信息。    “status”（int类型）…状态，定义值是BatteryManager.BATTERY_STATUS_XXX。    “health”（int类型）…健康，定义值是BatteryManager.BATTERY_HEALTH_XXX。    “present”（boolean类型）    “level”（int类型）…电池剩余容量    “scale”（int类型）…电池最大值。通常为100。    “icon-small”（int类型）…图标ID。    “plugged”（int类型）…连接的电源插座，定义值是BatteryManager.BATTERY_PLUGGED_XXX。    “voltage”（int类型）…mV。    “temperature”（int类型）…温度，0.1度单位。例如表示197的时候，意思为19.7度。     “technology”（String类型）…电池类型，例如，Li-ion等等。例程源码（Java）
package com.adakoda.batterytest;import android.app.Activity;
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.util.Log;public class BatteryTestActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate（Bundle savedInstanceState） {
    super.onCreate（savedInstanceState）;
    setContentView（R.layout.main）;
} @Override
protected void onResume（） {
    super.onResume（）;

    IntentFilter filter = new IntentFilter（）;

    filter.addAction（Intent.ACTION_BATTERY_CHANGED）;
    registerReceiver（mBroadcastReceiver, filter）;
} @Override
protected void onPause（） {
    super.onPause（）;

    unregisterReceiver（mBroadcastReceiver）;
} private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver（） {
    @Override
    public void onReceive（Context context, Intent intent） {
      String action = intent.getAction（）;
      if （action.equals（Intent.ACTION_BATTERY_CHANGED）） {
        int status = intent.getIntExtra（"status", 0）;
        int health = intent.getIntExtra（"health", 0）;
        boolean present = intent.getBooleanExtra（"present", false）;
        int level = intent.getIntExtra（"level", 0）;
        int scale = intent.getIntExtra（"scale", 0）;
        int icon_small = intent.getIntExtra（"icon-small", 0）;
        int plugged = intent.getIntExtra（"plugged", 0）;
        int voltage = intent.getIntExtra（"voltage", 0）;
        int temperature = intent.getIntExtra（"temperature", 0）;
        String technology = intent.getStringExtra（"technology"）;

        String statusString = "";

        switch （status） {
        case BatteryManager.BATTERY_STATUS_UNKNOWN:
          statusString = "unknown";
          break;
        case BatteryManager.BATTERY_STATUS_CHARGING:
          statusString = "charging";
          break;
        case BatteryManager.BATTERY_STATUS_DISCHARGING:
          statusString = "discharging";
          break;
        case BatteryManager.BATTERY_STATUS_NOT_CHARGING:
          statusString = "not charging";
          break;
        case BatteryManager.BATTERY_STATUS_FULL:
          statusString = "full";
          break;
        }

        String healthString = "";

        switch （health） {
        case BatteryManager.BATTERY_HEALTH_UNKNOWN:
          healthString = "unknown";
          break;
        case BatteryManager.BATTERY_HEALTH_GOOD:
          healthString = "good";
          break;
        case BatteryManager.BATTERY_HEALTH_OVERHEAT:
          healthString = "overheat";
          break;
        case BatteryManager.BATTERY_HEALTH_DEAD:
          healthString = "dead";
          break;
        case BatteryManager.BATTERY_HEALTH_OVER_VOLTAGE:
          healthString = "voltage";
          break;
        case BatteryManager.BATTERY_HEALTH_UNSPECIFIED_FAILURE:
          healthString = "unspecified failure";
          break;
        }

        String acString = "";

        switch （plugged） {
        case BatteryManager.BATTERY_PLUGGED_AC:
          acString = "plugged ac";
          break;
        case BatteryManager.BATTERY_PLUGGED_USB:
          acString = "plugged usb";
          break;
        }

        Log.v（"status", statusString）;
        Log.v（"health", healthString）;
        Log.v（"present", String.valueOf（present））;
        Log.v（"level", String.valueOf（level））;
        Log.v（"scale", String.valueOf（scale））;
        Log.v（"icon_small", String.valueOf（icon_small））;
        Log.v（"plugged", acString）;
        Log.v（"voltage", String.valueOf（voltage））;
        Log.v（"temperature", String.valueOf（temperature））;
        Log.v（"technology", technology）;
      }
    }
};
}