Android获取apk的版本及包名等信息

import android.app.Activity;

import android.content.Context;

import android.content.pm.ApplicationInfo;

import android.content.pm.PackageInfo;

import android.content.pm.PackageManager;

import android.content.res.Resources;

import android.graphics.drawable.Drawable;

import android.graphics.drawable.TransitionDrawable;

import android.os.Bundle;

import android.view.ViewGroup.LayoutParams;

import android.widget.Gallery;

import android.widget.ImageView;

import android.widget.LinearLayout;

import android.widget.TextView;

import android.widget.Toast;

 

public class test4 extends Activity {

    

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);       

        setContentView(R.layout.main);    

        String archiveFilePath="sdcard/download/Law.apk";//安装包路径

        PackageManager pm = getPackageManager();  

        PackageInfo info = pm.getPackageArchiveInfo(archiveFilePath, PackageManager.GET_ACTIVITIES);  

        if(info != null){  

            ApplicationInfo appInfo = info.applicationInfo;  

            String appName = pm.getApplicationLabel(appInfo).toString();  

            String packageName = appInfo.packageName;  //得到安装包名称

            String version=info.versionName;       //得到版本信息     

            Toast.makeText(test4.this, "packageName:"+packageName+";version:"+version, Toast.LENGTH_LONG).show();

            Drawable icon = pm.getApplicationIcon(appInfo);//得到图标信息

            TextView tv = (TextView)findViewById(R.id.tv); //显示图标

            tv.setBackgroundDrawable(icon);

        }  

    }

    

}

来自：http://blog.sina.com.cn/s/blog_49f485700100qk10.html