具体代码如下所示：
<?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="获取电池的信息" 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 { // 定义电池信息的按钮 private Button btnBattery; // 定义显示电池信息的textview private TextView tvBattery; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // 得到布局中的所有对象 findView(); // 设置对象的监听器 setListener(); } private void findView() { // 得到布局中的所有对象 btnBattery = (Button) findViewById(R.id.btn_battery); tvBattery = (TextView) findViewById(R.id.tv_battery); } // 设置对象的监听器 private void setListener() { btnBattery.setOnClickListener(listener); } OnClickListener listener = new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub switch (v.getId()) { // 当前的音量 case R.id.btn_battery: IntentFilter filter = new IntentFilter(); filter.addAction(Intent.ACTION_BATTERY_CHANGED); registerReceiver(mBroadcastReceiver,filter); break; } } }; // 声明广播接受者对象 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)) { // 得到电池状态： // BatteryManager.BATTERY_STATUS_CHARGING：充电状态。 // BatteryManager.BATTERY_STATUS_DISCHARGING：放电状态。 // BatteryManager.BATTERY_STATUS_NOT_CHARGING：未充满。 // BatteryManager.BATTERY_STATUS_FULL：充满电。 // BatteryManager.BATTERY_STATUS_UNKNOWN：未知状态。 int status = intent.getIntExtra("status",0); // 得到健康状态： // BatteryManager.BATTERY_HEALTH_GOOD：状态良好。 // BatteryManager.BATTERY_HEALTH_DEAD：电池没有电。 // BatteryManager.BATTERY_HEALTH_OVER_VOLTAGE：电池电压过高。 // BatteryManager.BATTERY_HEALTH_OVERHEAT：电池过热。 // BatteryManager.BATTERY_HEALTH_UNKNOWN：未知状态。 int health = intent.getIntExtra("health",0); // boolean类型 boolean present = intent.getBooleanExtra("present",false); // 得到电池剩余容量 int level = intent.getIntExtra("level",0); // 得到电池最大值。通常为100。 int scale = intent.getIntExtra("scale",0); // 得到图标ID int icon_small = intent.getIntExtra("icon-small",0); // 充电方式： BatteryManager.BATTERY_PLUGGED_AC：AC充电。 BatteryManager.BATTERY_PLUGGED_USB：USB充电。 int plugged = intent.getIntExtra("plugged",0); // 得到电池的电压 int voltage = intent.getIntExtra("voltage",0); // 得到电池的温度,0.1度单位。例如 表示197的时候，意思为19.7度 int temperature = intent.getIntExtra("temperature",0); // 得到电池的类型 String technology = intent.getStringExtra("technology"); // 得到电池状态 String statusString = ""; // 根据状态id，得到状态字符串 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; } //得到电池的寿命状态 String healthString = ""; //根据状态id，得到电池寿命 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; } //得到充电模式 String acString = ""; //根据充电状态id，得到充电模式 switch (plugged) { case BatteryManager.BATTERY_PLUGGED_AC: acString = "plugged ac"; break; case BatteryManager.BATTERY_PLUGGED_USB: acString = "plugged usb"; break; } //显示电池信息 tvBattery.setText("电池的状态：" + statusString + "\n健康值: "+ healthString + "\n电池剩余容量： " + level + "\n电池的最大值：" + scale + "\n小图标：" + icon_small + "\n充电方式：" + plugged + "\n充电方式: " + acString + "\n电池的电压：" + voltage + "\n电池的温度：" + (float) temperature * 0.1 + "\n电池的类型：" + technology); } } }; @Override protected void onPause() { super.onPause(); // 解除注册监听 unregisterReceiver(mBroadcastReceiver); } }
