Android之获取手机型号,系统版本,App版本号等信息

MainActivity如下:

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描述:
 * 获得手机型号,系统版本,App版本号等信息
   */
   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=
     "手机型号:" + android.os.Build.MODEL + 
     ",SDK版本:" + android.os.Build.VERSION.SDK + 
     ",系统版本:" + android.os.Build.VERSION.RELEASE+
     ",软件版本:"+getAppVersionName(MainActivity.this); 
     return handSetInfo;

  }
  //获取当前版本号
  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如下:

<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>