android 根据apk获取其包名，并根据包名启动app

//根据apk获取应用包名 private void getApkInfo(){ PackageManager pm = this.getPackageManager(); String path= Environment.getExternalStorageDirectory()+"/demo.apk";//apk保存路径（sd卡根目录下） PackageInfo info = pm.getPackageArchiveInfo(path, PackageManager.GET_ACTIVITIES); ApplicationInfo appInfo = null;   if (info != null) { appInfo = info.applicationInfo; name = appInfo.packageName;//此为apk包名 }}

//根据包名启动app public void startAPP(String appPackageName){ try{ Intent intent = this.getPackageManager().getLaunchIntentForPackage(appPackageName); startActivity(intent); }catch(Exception e){ Toast.makeText(this, "没有安装", Toast.LENGTH_LONG).show(); } }