Question

我想创建一个应用程序，如果我以用户身份连接互联网并使用电子邮件意图，则通过电子邮件向公司发送一些信息

String priceMassage = creatOrderSummery(price, hasWippedCream, hasChocolate, name);

Intent intent = new Intent(Intent.ACTION_SENDTO);
intent.setData(Uri.parse("mailto: ")); // only email apps should handle this
intent.putExtra(Intent.EXTRA_SUBJECT, "Just Java order for " + name);
intent.putExtra(Intent.EXTRA_TEXT, priceMassage);
if (intent.resolveActivity(getPackageManager()) != null) {
    startActivity(intent);
}

displayMessage(priceMassage);

但如果我不上网，我希望通过短信发送到公司手机号码的信息，我该怎么办？

Answer 1

您需要检查设备是否已连接到互联网

您可以通过ConnectionManager课程查看互联网连接。

ConnectivityManager cm = (ConnectivityManager) context
                    .getSystemService(Context.CONNECTIVITY_SERVICE);

 cm.getActiveNetworkInfo().isConnected(); // return true if internet or otherwise flase

if (internet){
 // Email send code here
} else {
 // SMS send code here
}

这是样本解决方案

Answer 2

为了发送短信

在AndroidManifest.xml中添加权限

<uses-permission android:name="android.permission.SEND_SMS" />

public void sendSMS(String phoneNo, String msg) {
    try {      
        SmsManager smsManager = SmsManager.getDefault();
        smsManager.sendTextMessage(phoneNo, null, msg, null, null);    
        Toast.makeText(getApplicationContext(), "Message Sent",
              Toast.LENGTH_LONG).show();
    } catch (Exception ex) {
        Toast.makeText(getApplicationContext(),ex.getMessage().toString(),
              Toast.LENGTH_LONG).show();
        ex.printStackTrace();
    } 
}

Answer 3

使用此代码检查主要

中的intenet连接

TestInternet testInternet = new TestInternet();
        testInternet.execute();

out of main

class TestInternet extends AsyncTask<Void, Void, Boolean>
        {
            @Override
            protected Boolean doInBackground(Void... params) {
                try {
                    URL url = new URL("http://www.google.com");
                    HttpURLConnection urlc = (HttpURLConnection) url.openConnection();
                    urlc.setConnectTimeout(4000);
                    urlc.connect();
                    if (urlc.getResponseCode() == 200) {
                        return true;
                    }
                } catch (MalformedURLException e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                    return false;
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                    return false;
                }
                return false;
            }

            @Override
            protected void onPostExecute(Boolean result)
            {
                if (!result)
                {
               // send sms
                else
                    {
                     //send mail     
                    }
            }
        }

如果没有互联网连接，发送短信的代码是什么？

3 个答案: