android 獲得電池狀態，android電池

android 獲得電池狀態，android電池

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/btn_battery"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="獲取電池的信息" />

    <TextView
        android:id="@+id/tv_battery"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        />

</RelativeLayout>

package com.example.yanlei.yl;

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();
        // 設置對象的監聽器
        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);
    }

    // 設置對象的監聽器
    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：
                // BatteryManager.BATTERY_STATUS_CHARGING：充電狀態。
                // BatteryManager.BATTERY_STATUS_DISCHARGING：放電狀態。
                // BatteryManager.BATTERY_STATUS_NOT_CHARGING：未充滿。
                // BatteryManager.BATTERY_STATUS_FULL：充滿電。
                // BatteryManager.BATTERY_STATUS_UNKNOWN：未知狀態。
                int status = intent.getIntExtra("status", 0);
                // 得到健康狀態：
                // BatteryManager.BATTERY_HEALTH_GOOD：狀態良好。
                // 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。
                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
                String statusString = "";
                // 根據狀態id，得到狀態字符串
                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
                String healthString = "";
                //根據狀態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 = "";
                //根據充電狀態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：" + 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();
        // 解除注冊監聽
        unregisterReceiver(mBroadcastReceiver);
    }

}