<?xml version="1.0"?>
<LinearLayout android:orientation="vertical" android:layout_height="match_parent" android:layout_width="match_parent" xmlns:tools="http://schemas.android.com/tools" xmlns:android="http://schemas.android.com/apk/res/android">
<Button android:layout_height="wrap_content" android:layout_width="match_parent" android:text="獲取電池的信息" android:id="@+id/btn_battery"/>
<TextView android:layout_height="wrap_content" android:layout_width="match_parent" android:id="@+id/tv_battery"/>
</LinearLayout> 
package com.example.yanlei.wifi;
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.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
// 定義電池信息的按鈕
private Button btnBattery;
// 定義顯示電池信息的textview
private TextView tvBattery;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 得到布局中的所有對象
findView();
// 設(shè)置對象的監(jiān)聽器
setListener();
}
private void findView() {
// 得到布局中的所有對象
btnBattery = (Button) findViewById(R.id.btn_battery);
tvBattery = (TextView) findViewById(R.id.tv_battery);
}
// 設(shè)置對象的監(jiān)聽器
private void setListener() {
btnBattery.setOnClickListener(listener);
}
OnClickListener listener = new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
// 當前的音量
case R.id.btn_battery:
IntentFilter filter = new IntentFilter();
filter.addAction(Intent.ACTION_BATTERY_CHANGED);
registerReceiver(mBroadcastReceiver, filter);
break;
}
}
};
// 聲明廣播接受者對象
private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
String action = intent.getAction();
if (action.equals(Intent.ACTION_BATTERY_CHANGED)) {
// 得到電池狀態(tài)：
// BatteryManager.BATTERY_STATUS_CHARGING：充電狀態(tài)。
// BatteryManager.BATTERY_STATUS_DISCHARGING：放電狀態(tài)。
// BatteryManager.BATTERY_STATUS_NOT_CHARGING：未充滿。
// BatteryManager.BATTERY_STATUS_FULL：充滿電。
// BatteryManager.BATTERY_STATUS_UNKNOWN：未知狀態(tài)。
int status = intent.getIntExtra("status", 0);
// 得到健康狀態(tài)：
// BatteryManager.BATTERY_HEALTH_GOOD：狀態(tài)良好。
// BatteryManager.BATTERY_HEALTH_DEAD：電池沒有電。
// BatteryManager.BATTERY_HEALTH_OVER_VOLTAGE：電池電壓過高。
// BatteryManager.BATTERY_HEALTH_OVERHEAT：電池過熱。
// BatteryManager.BATTERY_HEALTH_UNKNOWN：未知狀態(tài)。
int health = intent.getIntExtra("health", 0);
// boolean類型
boolean present = intent.getBooleanExtra("present", false);
// 得到電池剩余容量
int level = intent.getIntExtra("level", 0);
// 得到電池最大值。通常為100。
int scale = intent.getIntExtra("scale", 0);
// 得到圖標ID
int icon_small = intent.getIntExtra("icon-small", 0);
// 充電方式：　BatteryManager.BATTERY_PLUGGED_AC：AC充電。　BatteryManager.BATTERY_PLUGGED_USB：USB充電。
int plugged = intent.getIntExtra("plugged", 0);
// 得到電池的電壓
int voltage = intent.getIntExtra("voltage", 0);
// 得到電池的溫度,0.1度單位。例如 表示197的時候，意思為19.7度
int temperature = intent.getIntExtra("temperature", 0);
// 得到電池的類型
String technology = intent.getStringExtra("technology");
// 得到電池狀態(tài)
String statusString = "";
// 根據(jù)狀態(tài)id，得到狀態(tài)字符串
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;
}
//得到電池的壽命狀態(tài)
String healthString = "";
//根據(jù)狀態(tài)id，得到電池壽命
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;
}
//得到充電模式
String acString = "";
//根據(jù)充電狀態(tài)id，得到充電模式
switch (plugged) {
case BatteryManager.BATTERY_PLUGGED_AC:
acString = "plugged ac";
break;
case BatteryManager.BATTERY_PLUGGED_USB:
acString = "plugged usb";
break;
}
//顯示電池信息
tvBattery.setText("電池的狀態(tài)：" + statusString
+ "\n健康值: "+ healthString
+ "\n電池剩余容量： " + level
+ "\n電池的最大值：" + scale
+ "\n小圖標：" + icon_small
+ "\n充電方式：" + plugged
+ "\n充電方式: " + acString
+ "\n電池的電壓：" + voltage
+ "\n電池的溫度：" + (float) temperature * 0.1
+ "\n電池的類型：" + technology);
}
}
};
@Override
protected void onPause() {
super.onPause();
// 解除注冊監(jiān)聽
unregisterReceiver(mBroadcastReceiver);
}
}