34 Android 简单版本信息封装

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package com.example.android_apk_install;import android.content.Context;import android.content.pm.PackageInfo;import android.content.pm.PackageManager;/** * 版本信息 * @author Administrator * */public class PackageUtils {private Context context;private PackageManager manager;private PackageInfo info;public PackageUtils(Context context) {this.context = context;init();}/** * 初始化数据 */public void init() {manager = context.getPackageManager();try {info = manager.getPackageInfo(context.getPackageName(),PackageManager.GET_ACTIVITIES);} catch (Exception e) {// TODO: handle exceptione.printStackTrace();}}public int getVersionCode(){return info.versionCode;}/** *  * @return */public String getVersionName(){return info.versionName;}/** * 是否需要升级 * @param oldVersion * @param newVersion * @return */public boolean isUpgrada(int oldVersion,int newVersion){boolean flag = false;flag = newVersion > oldVersion ? true : false;return flag;}}

测试

package com.example.android_apk_install;import android.os.Bundle;import android.app.Activity;import android.content.pm.PackageInfo;import android.content.pm.PackageManager;import android.view.Menu;import android.widget.Toast;public class MainActivity extends Activity {PackageUtils utils;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);utils=new PackageUtils(this);int currVersionCode=utils.getVersionCode();boolean flag=utils.isUpgrada(currVersionCode, 2);if (flag) {Toast.makeText(this, "有新版本", 1).show();}}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}}

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