android 判断是否安装，微信、支付宝、qq、新浪app!

public class IsInstallWeChatOrAliPay {

    public IsInstallWeChatOrAliPay() {
    }

    /**
     * 检测是否安装支付宝
     * @param context
     * @return
     */
    public static boolean checkAliPayInstalled(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;
    }

    /**
     * 判断 用户是否安装微信客户端
     */
    public static boolean isWeixinAvilible(Context context) {
        final PackageManager packageManager = context.getPackageManager();// 获取packagemanager
        List pinfo = packageManager.getInstalledPackages(0);// 获取所有已安装程序的包信息
        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;
    }

    /**
     * 判断 用户是否安装QQ客户端
     */
    public static boolean isQQClientAvailable(Context context) {
        final PackageManager packageManager = context.getPackageManager();
        List pinfo = packageManager.getInstalledPackages(0);
        if (pinfo != null) {
            for (int i = 0; i < pinfo.size(); i++) {
                String pn = pinfo.get(i).packageName;
                if (pn.equalsIgnoreCase("com.tencent.qqlite") || pn.equalsIgnoreCase("com.tencent.mobileqq")) {
                    return true;
                }
            }
        }
        return false;
    }

    /**
     * sina
     * 判断是否安装新浪微博
     */
    public static boolean isSinaInstalled(Context context){
        final PackageManager packageManager = context.getPackageManager();// 获取packagemanager
        List pinfo = packageManager.getInstalledPackages(0);// 获取所有已安装程序的包信息
        if (pinfo != null) {
            for (int i = 0; i < pinfo.size(); i++) {
                String pn = pinfo.get(i).packageName;
                if (pn.equals("com.sina.weibo")) {
                    return true;
                }
            }
        }

        return false;
    }
}