Get Android Phone model, system version, app version number, etc.

  mainactivity as follows:

 package cn.testgethandsetinfo; import android.os.Bundle; import android.text.TextUtils;
Import Android.widget.TextView;
Import android.app.Activity;
Import Android.content.Context;
Import Android.content.pm.PackageInfo;
Import Android.content.pm.PackageManager;
	/** * Demo Description: * Get mobile phone model, system version, app version number and other information * * public class Mainactivity extends activity {private TextView Mtextview;
		@Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);
		Setcontentview (R.layout.main);
	Init ();
	   private void Init () {mtextview= (TextView) Findviewbyid (R.id.textview);
   Mtextview.settext (Gethandsetinfo ()); private String Gethandsetinfo () {string handsetinfo= "mobile phone Model:" + Android.os.Build.MODEL + ", SDK version:" + Android. Os. 
	  Build.VERSION.SDK + ", System version:" + android.os.build.version.release+ ", software version:" +getappversionname (Mainactivity.this);

  return handsetinfo; //Get the current version number private String Getappversionname (Context context) {String versionname = "";
			try {Packagemanager Packagemanager = Context.getpackagemanager ();
			PackageInfo PackageInfo = Packagemanager.getpackageinfo ("Cn.testgethandsetinfo", 0);
			Versionname = Packageinfo.versionname;
			if (Textutils.isempty (Versionname)) {return "";
		} catch (Exception e) {e.printstacktrace ();
	return versionname; }

}

Main.xml is as follows:

<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 "
    >

    <textview
        android:id= "@+id/textview"
        android:layout_width= "Wrap_content"
        android: layout_height= "Wrap_content"
        android:text= "@string/hello_world" 
        android:layout_centerinparent= "true"
        />

</RelativeLayout>