Android详细教程（基础篇）：三十二、Android手机服务：BatteryManager(电池管理) 、AudioManager(声音管理)、TelephonyManager(电话服务管理)

手机服务

14.1. BatteryManager(电池管理)

电池电量信息的Action

实例：取得电池电量信息

以对话框形式将电池电量广播出去：

package com.example.batteryproject; import android.app.AlertDialog; import android.app.Dialog; import android.content.BroadcastReceiver; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; public class BatteryBroadcastReceive extends BroadcastReceiver {             @Override             public void onReceive(Context ctx, Intent intent) {                                           // 接收广播                        if (Intent.ACTION_BATTERY_CHANGED.equals(intent.getAction())) { // 判断Action                                    int level = intent.getIntExtra("level", 0);                                     // 取得电池剩余容量                                    int scale = intent.getIntExtra("scale", 100);                                           // 取得电池总量                                    Dialog dialog = new AlertDialog.Builder(ctx)                                          // 创建对话框                                                           .setTitle("电池电量")                                                        // 设置标题                                                           .setMessage("电池电量为：" +                                                                                   String.valueOf(level * 100 / scale)+ "%")  // 设置信息                                                           .setNegativeButton("关闭",                                  // 设置取消按钮                                                                                   new DialogInterface.OnClickListener() {   // 设置监听操作                                                                                              public void onClick(DialogInterface dialog,                                                                                                                      int whichButton) {                                                                                              }                                                                                   })                                           // 显示信息                                                           .create();                                                     // 创建Dialog                                    dialog.show();                                                                    // 显示对话框                        }             } }

 

通过Activity启动广播：

package com.example.batteryproject; import android.app.Activity; import android.content.Intent; import android.content.IntentFilter; imp