获取未安装的APK信息

 /** 获取未安装的APK信息**/

public void getUninatllApkInfo(Context context, String archiveFilePath){   

      PackageManager pm = context.getPackageManager();

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

     if(info != null){

            //获取包信息

     }

}

/**安装apk**/

public void installApk(String path) {

            Intent intent = new Intent(Intent.ACTION_VIEW);
            intent.addCategory(Intent.CATEGORY_DEFAULT);
            intent.setDataAndType(Uri.fromFile(new File(path)),
                    "application/vnd.android.package-archive");
            startActivity(intent);

}