Android電池相關信息的獲取

1.定義廣播接收，顯示電池信息--BatteryInfoBroadcastReceiver

    package org.lxh.demo;


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 BatteryInfoBroadcastReceiver extends BroadcastReceiver {  

    @Override  
    public void onReceive(Context context, Intent intent) {  
        if (Intent.ACTION_BATTERY_CHANGED.equals(intent.getAction())) {  
            int level = intent.getIntExtra("level", 0);  
            int scale = intent.getIntExtra("scale", 0);  
            int voltage = intent.getIntExtra("voltage", 0);  
            int temperature = intent.getIntExtra("temperature", 0);  
            String technology = intent.getStringExtra("technology");  
            Dialog dialog = new AlertDialog.Builder(context)  
                    .setTitle("電池電量")  
                    .setMessage(  
                            "電池電量為：" + String.valueOf(level * 100 / scale)  
                                    + "%\n" + "電池電壓為："  
                                    + String.valueOf((float)voltage / 1000) + "v"  
                                    + "\n電池類型為：" + technology + "\n" + "電池溫度為："  
                                    + String.valueOf((float)temperature / 10) + "°C")  
                    .setNegativeButton("關閉",  
                            new DialogInterface.OnClickListener() {  

                                public void onClick(DialogInterface arg0,  
                                        int arg1) {  

                                }  
                            }).create();  
            dialog.show();  
        }  

    }  

}  </pre><br />

2.定義布局管理器--main.xml 
    <?xml version="1.0" encoding="utf-8"?>

    <LinearLayout xmlns:android="
        android:layout_width="fill_parent"

        android:layout_height="fill_parent"

        android:orientation="vertical" >


    <Button  
        android:id="@+id/mybtn"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:text="獲取電池電量" />  

</LinearLayout>  </pre><br />

3.定義Activity程序： 
    package org.lxh.demo;


import android.app.Activity;  
import android.app.AlertDialog;  
import android.app.Dialog;  
import android.content.DialogInterface;  
import android.content.Intent;  
import android.content.IntentFilter;  
import android.os.Bundle;  
import android.view.View;  
import android.view.View.OnClickListener;  
import android.view.View.OnFocusChangeListener;  
import android.widget.Button;  
import android.widget.EditText;  
import android.widget.TextView;  

public class Hello extends Activity {  
    private Button mybtn = null;  

    public void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState); // 生命周期方法  
        super.setContentView(R.layout.main); // 設置要使用的布局管理器  
        this.mybtn = (Button) super.findViewById(R.id.mybtn);  
        this.mybtn.setOnClickListener(new OnClickListenerImpl());  

    }  

    private class OnClickListenerImpl implements OnClickListener {  

        public void onClick(View v) {  
            BatteryInfoBroadcastReceiver receiver = null;  
            receiver = new BatteryInfoBroadcastReceiver();  
            IntentFilter filter = new IntentFilter(  
                    Intent.ACTION_BATTERY_CHANGED);  
            Hello.this.registerReceiver(receiver, filter);  

        }  

    }  
}  </pre><br />