android--Battery-related information acquisition

1. Define broadcast receive, display battery information--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 {@Overridepublic 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");D ialog Dialog = new Alertdialog.builder (context). Settitle (" Battery power "). Setmessage (" Battery charge: "+ string.valueof (Level * 100/scale) +"%\n "+" battery voltage: "+ string.valueof ((float) voltage/1000) + "V" + "\ n Battery Type:" + technology + "\ n" + "Battery temperature:" + string.valueof ((float) temperature/10) + "°c"). Setnegativebutton ("Off", n EW Dialoginterface.onclicklistener () {public void OnClick (Dialoginterface arg0,int arg1) {}}). Create ();d ialog.show ();}} 

2. Define the layout manager--main.xml

<?xml version= "1.0" encoding= "Utf-8"? ><linearlayout xmlns:android= "http://schemas.android.com/apk/res/ Android "    android:layout_width=" fill_parent "    android:layout_height=" fill_parent "    android:o rientation= "vertical" >    <button        android:id= "@+id/mybtn"        android:layout_width= "Wrap_content"        android:layout_height= "wrap_content"        android:text= "Get battery power"/></linearlayout>

3. Define the Activity program:

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 saved Instancestate) {super.oncreate (savedinstancestate);//life cycle Method Super.setcontentview (R.layout.main); Set the layout manager to use 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);}}}

The effect of running on the actual phone is as follows:

Source: http://download.csdn.net/detail/yayun0516/8409715

android--Battery-related information acquisition