Android 获取电池基本信息代码

package org.example.itester;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.graphics.Color;
import android.os.BatteryManager;
import android.os.Bundle;
import android.widget.TextView;

public class batteryinfo extends ITester{

    private TextView batTxt;
    
    private BroadcastReceiver mBatInfoReceiver = new BroadcastReceiver(){
        @Override
        public void onReceive(Context arg0, Intent intent) {
            String action = intent.getAction();
            if (Intent.ACTION_BATTERY_CHANGED.equals(action)){
            
                int status = intent.getIntExtra("status", 0);
                int health = intent.getIntExtra("health", 1);
                boolean present = intent.getBooleanExtra("present", false);
                int level = intent.getIntExtra("level", 0);
                int scale = intent.getIntExtra("scale", 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 = "unknown";
                      
            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 = "unknown";
                    
            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 = "Unknown";
                    
            switch (plugged) {
                case BatteryManager.BATTERY_PLUGGED_AC:
                    acString = "plugged ac";
                    break;
                case BatteryManager.BATTERY_PLUGGED_USB:
                    acString = "plugged usb";
                    break;
            }
            batTxt.setTextColor(Color.BLUE);
            batTxt.setTextSize(38);
            batTxt.setText(   "Status: " + statusString +
                              "\nLevel: " + String.valueOf(level) + "%" +
                              "\nHealth: " + healthString +
                              "\nPresent: " + String.valueOf(present)+
                              "\nScale: " + String.valueOf(scale)+
                              "\nPlugged: " + acString +
                              "\nVoltage: " + String.valueOf(voltage) +
                              "\nTemperature: " + String.valueOf(temperature) +
                              "\nTechnology: " + technology);                  
            }
    }
};
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.batteryinfo);
        batTxt = (TextView)findViewById(R.id.battery_info);
        registerReceiver(mBatInfoReceiver, 
                new IntentFilter(Intent.ACTION_BATTERY_CHANGED));

    }
    
    @Override
    protected void onResume() {
        super.onResume();
        registerReceiver(mBatInfoReceiver, 
                new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
      }

      @Override
      protected void onPause() {
        super.onPause();
        unregisterReceiver(mBatInfoReceiver);
      }
}