1. Get installation package information

/**
*  To obtain apk Package information: version number, name, icon, etc
* @param absPath apk The absolute path of the package
* @param context 
*/ 
public void apkInfo(String absPath,Context context) { 

    PackageManager pm = context.getPackageManager(); 
    PackageInfo pkgInfo = pm.getPackageArchiveInfo(absPath,PackageManager.GET_ACTIVITIES); 
    if (pkgInfo != null) { 
        ApplicationInfo appInfo = pkgInfo.applicationInfo; 
        /*  These two sentences must be added, or the following icon Acquisition is default icon It's not application-packed icon */ 
        appInfo.sourceDir = absPath; 
        appInfo.publicSourceDir = absPath; 
        String appName = pm.getApplicationLabel(appInfo).toString();//  Get the applied name  
        String packageName = appInfo.packageName; //  Get the package name  
        String version = pkgInfo.versionName; //  Get version information  
        /* icon1 and icon2 Is actually 1 The sample of  */ 
        Drawable icon1 = pm.getApplicationIcon(appInfo);//  Get the icon information  
        Drawable icon2 = appInfo.loadIcon(pm); 
        String pkgInfoStr = String.format("PackageName:%s, Vesion: %s, AppName: %s", packageName, version, appName); 
        Log.i(TAG, String.format("PkgInfo: %s", pkgInfoStr)); 
    } 
}

2. When installing APK, we can get the installation package, version, package name and other information.

public class TestActivity extends Activity {
 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  String archiveFilePath="sdcard/ofstack.com.apk";// Install package path
  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; // Gets the name of the installation package
     String version=info.versionName; // Get version information
     // Toast.makeText(TestActivity.this, , Toast.LENGTH_LONG).show();
     Drawable icon = pm.getApplicationIcon(appInfo);// Get the icon information
     TextView tv = (TextView)findViewById(R.id.tv);
     tv.setText("appName:"+appName+"---packageName:"+packageName);
     // Display icon
     ImageView tu=(ImageView)findViewById(R.id.imageView1);
     tu.setBackgroundDrawable(icon);
    }
   }
  }
 }
}