一、Android判断是否安装微信

  /**
     * 检测是否安装支付宝客户端
     * @param context
     * @return
     */
    public boolean isAliPayInstalled(Context context) {
        Uri uri = Uri.parse("alipays://platformapi/startApp");
        Intent intent = new Intent(Intent.ACTION_VIEW, uri);
        ComponentName componentName = intent.resolveActivity(context.getPackageManager());
        return componentName != null;
    }

二、Android判断是否安装支付宝

    /**
     * 检测是否安装微信客户端
     * @param context
     * @return
     */
    public boolean isWeixinAvilible(Context context) {
        final PackageManager packageManager = context.getPackageManager();
        List<PackageInfo> pinfo = packageManager.getInstalledPackages(0);
        if (pinfo != null) {
            for (int i = 0; i < pinfo.size(); i++) {
                String pn = pinfo.get(i).packageName;
                if (pn.equals("com.tencent.mm")) {
                    return true;
                }
            }
        }
        return false;
    }