Android开发之--判断当前手机上是否存在QQ或微信应用

//判断QQ是否可用

publicstatic boolean isQQClientAvailable(Context context) {

    finalPackageManager packageManager = context.getPackageManager();

    List<PackageInfo> pinfo = packageManager.getInstalledPackages(0);

    if(pinfo != null) {

      for(inti = 0; i < pinfo.size(); i++) {

        String pn = pinfo.get(i).packageName;

        if(pn.equals("com.tencent.mobileqq")) {

          returntrue;

        }

      }

    }

    returnfalse;

  }

//使用时候，

if( ! isQQClientAvailable（this)){

  //QQ不可用 提示相关信息

}else{

//QQ可用，操作--

}

    //判断微信是否可用

publicstatic boolean isWeixinAvilible(Context context) {

    finalPackageManager packageManager = context.getPackageManager();// 获取packagemanager

    List<PackageInfo> pinfo = packageManager.getInstalledPackages(0);// 获取所有已安装程序的包信息

    if(pinfo != null) {

      for(inti = 0; i < pinfo.size(); i++) {

        String pn = pinfo.get(i).packageName;

        if(pn.equals("com.tencent.mm")) {

          returntrue;

        }

      }

    }

    returnfalse;

  }