andriod 获取电池的信息

<?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);

    }

}