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);
      }
    }
  };
}