发送短信并记录数据

Question

我正在创建一个应用，其中用户填写表单并向电话号码发送短信。然后，应用程序将数据记录到csv文件中。应用程序应该在发送短信时记录数据但正好相反。当没有发送短信时记录数据，发送短信时不记录数据，任何人都可以小心帮忙吗？这是我的代码和XML文件。

代码：

    package com.mycompany.sms1;

import android.app.*;
import android.content.*;
import android.os.*;
import android.telephony.*;
import android.telephony.gsm.*;
import android.view.*;
import android.widget.*;
import java.io.*;

import android.telephony.gsm.SmsManager;


public class MainActivity extends Activity 
{

    EditText name, labnum, txtPhoneNo, amount;
    Button btnSendSMS;
    static boolean success=false;

    String imei=/*"351892081280633";//*/"865735030867621";
    String phoneNo,message,data;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);

        TelephonyManager tm=(TelephonyManager)getSystemService(this.TELEPHONY_SERVICE);

        if (imei.equals(tm.getDeviceId())) setContentView(R.layout.main);
        else {setContentView(R.layout.register); return;}

        name = (EditText) findViewById(R.id.name);
        labnum = (EditText) findViewById(R.id.labnum);
        txtPhoneNo = (EditText) findViewById(R.id.txtPhoneNo);
        amount = (EditText) findViewById(R.id.amount);
        btnSendSMS = (Button) findViewById(R.id.btnSendSMS);

    }

    public void buttonClicked(View v) 
    { 

        if (EverythingIsOK())
        {
            phoneNo = txtPhoneNo.getText().toString();
            message = "Thanks for the payment.";
            sendSMS(phoneNo, message);
            try{Thread.sleep(1000);}catch(Exception e){}
            if(success) storeData();    
            success=false;
        }
    }

    public void clearClicked(View v) 
    { 
        name.setText("");
        labnum.setText("");
        txtPhoneNo.setText("");
        amount.setText("");

    }


    private boolean EverythingIsOK()
    {
        if(checkExternalMedia() && checkData()) return true;
        return false;
    }

    /** Method to check whether external media available and writable. This is adapted from
     http://developer.android.com/guide/topics/data/data-storage.html#filesExternal */

    private boolean checkExternalMedia()
    {
        boolean mExternalStorageAvailable = false;
        boolean mExternalStorageWriteable = false;

        String state = Environment.getExternalStorageState();

        if (Environment.MEDIA_MOUNTED.equals(state))
        {
            // Can read and write the media
            mExternalStorageAvailable = mExternalStorageWriteable = true;
            return true;
        }
        else if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(state))
        {
            // Can only read the media
            mExternalStorageAvailable = true;
            mExternalStorageWriteable = false;
            showToast("SD Card is not writable.");
        }
        else
        {
            // Can't read or write
            mExternalStorageAvailable = mExternalStorageWriteable = false;
            showToast("SD Card is neither readable nor writable.");
        }   
        return false;
    }


    //---sends an SMS message to another device---
    private void sendSMS(String phoneNumber, String message)
    {
        String SENT = "SMS_SENT";
        String DELIVERED = "SMS_DELIVERED";

        PendingIntent sentPI = PendingIntent.getBroadcast(this, 0,
                                                          new Intent(SENT), 0);

        PendingIntent deliveredPI = PendingIntent.getBroadcast(this, 0,
                                                               new Intent(DELIVERED), 0);

        //---when the SMS has been sent---
        registerReceiver(new BroadcastReceiver(){
                @Override
                public void onReceive(Context arg0, Intent arg1)
                {
                    switch (getResultCode())
                    {
                        case Activity.RESULT_OK: showToast("SMS sent."); setSuccess(true);break;
                        case SmsManager.RESULT_ERROR_GENERIC_FAILURE: showToast("Generic failure."); break;
                        case SmsManager.RESULT_ERROR_NO_SERVICE:showToast("No service."); break;
                        case SmsManager.RESULT_ERROR_NULL_PDU:showToast("Null PDU."); break;
                        case SmsManager.RESULT_ERROR_RADIO_OFF: showToast("Radio off."); break;
                    }
                }
            }, new IntentFilter(SENT));
        /*
         //---when the SMS has been delivered---
         registerReceiver(new BroadcastReceiver(){
         @Override
         public void onReceive(Context arg0, Intent arg1)
         {
         switch (getResultCode())
         {
         case Activity.RESULT_OK: showToast("SMS delivered."); break;
         case Activity.RESULT_CANCELED: showToast("SMS not delivered."); break;
         }
         }
         }, new IntentFilter(DELIVERED));        

         */
        try{
            SmsManager sms = SmsManager.getDefault();
            sms.sendTextMessage(phoneNumber, null, message, sentPI, deliveredPI);  
        }catch (Exception e){showToast(e.toString());}

    }


    private void setSuccess(boolean b){
        success=b;
    }







    /** Method to write ascii text characters to file on SD card. Note that you must add a 
     WRITE_EXTERNAL_STORAGE permission to the manifest file or this method will throw
     a FileNotFound Exception because you won't have write permission. */


    private boolean checkData()
    {
        String s1=name.getText().toString();
        String s2=labnum.getText().toString();
        String s3=txtPhoneNo.getText().toString();
        String s4=amount.getText().toString();

        if (s1.contains(",") || s2.contains(",") || s3.contains(",") || s4.contains(","))
        {       
            showToast("Comma is not allowed.");
            return false;
        }

        if (s1.isEmpty() || s2.isEmpty() || s3.isEmpty() || s4.isEmpty())
        {

            showToast("Please fill all the details.");
            return false;
        }

        data=s1 + "," + s2 + "," + s3 + "," + s4 + "," + "\n";
        return true;
    }


    private boolean storeData()
    {
        writeToSDFile();
        return true;
    }


    private boolean writeToSDFile()
    {

        File root,dir,file;
        // Find the root of the external storage.
        // See http://developer.android.com/guide/topics/data/data-  storage.html#filesExternal

        root = android.os.Environment.getExternalStorageDirectory(); 
        //labnum.setText("\nExternal file system root: "+root);

        // See http://stackoverflow.com/questions/3551821/android-write-to-sd-card-folder

        dir = new File(root.getAbsolutePath());
        dir.mkdirs();
        file = new File(dir, "data.csv");

        try
        {
            FileOutputStream f = new FileOutputStream(file, true);
            PrintWriter pw = new PrintWriter(f);
            pw.print(data);
            pw.flush();
            pw.close();
            f.close();
            showToast("Data saved to " + file);
            return true;
        }
        catch (FileNotFoundException e)
        {
            e.printStackTrace();
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }   
        return false;
    }






    private void showToast(String toastText)
    {
        Context context=getApplicationContext();
        int duration= Toast.LENGTH_SHORT;
        Toast toast=Toast.makeText(context, toastText, duration);
        toast.setGravity(Gravity.CENTER, 0, 0);
        toast.show();
    }
}

XML文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_height="match_parent"
    android:layout_width="match_parent"
    android:orientation="vertical"
    android:background="#CDDC39">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="@string/doctor"
        android:layout_marginTop="20dp"
        android:layout_marginLeft="10dp"/>

    <LinearLayout
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:orientation="vertical"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:layout_marginTop="25dp"
        android:layout_marginBottom="40dp">

        <LinearLayout
            android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:orientation="horizontal"
            android:gravity="right|center_vertical"
            android:layout_marginBottom="10dp">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:text="@string/name"
                android:textColor="#000000"
                android:textStyle="bold"/>

            <EditText
                android:layout_height="wrap_content"
                android:layout_width="0dp"
                android:ems="10"
                android:layout_weight="1"
                android:layout_marginLeft="10dp"
                android:textColor="#000000"
                android:id="@+id/name"/>

        </LinearLayout>

        <LinearLayout
            android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:orientation="horizontal"
            android:gravity="center_vertical"
            android:layout_marginBottom="10dp">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:text="@string/labnum"
                android:textColor="#000000"
                android:textStyle="bold"/>

            <EditText
                android:layout_height="wrap_content"
                android:layout_width="0dp"
                android:ems="10"
                android:layout_weight="1"
                android:layout_marginLeft="10dp"
                android:textColor="#000000"
                android:id="@+id/labnum"/>

        </LinearLayout>

        <LinearLayout
            android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:orientation="horizontal"
            android:gravity="center_vertical"
            android:layout_marginBottom="10dp">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:text="@string/phone"
                android:textColor="#000000"
                android:textStyle="bold"/>

            <EditText
                android:layout_height="wrap_content"
                android:layout_width="0dp"
                android:ems="10"
                android:layout_weight="1"
                android:layout_marginLeft="10dp"
                android:textColor="#000000"
                android:inputType="phone"
                android:id="@+id/txtPhoneNo"/>

        </LinearLayout>

        <LinearLayout
            android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:orientation="horizontal"
            android:gravity="center_vertical">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:text="@string/amount"
                android:textColor="#000000"
                android:textStyle="bold"/>

            <EditText
                android:layout_height="wrap_content"
                android:layout_width="0dp"
                android:ems="10"
                android:layout_weight="1"
                android:layout_marginLeft="10dp"
                android:textColor="#000000"
                android:inputType="numberDecimal"
                android:id="@+id/amount"/>

        </LinearLayout>

    </LinearLayout>

    <LinearLayout
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:orientation="horizontal"
        android:gravity="center">

        <Button
            android:layout_height="wrap_content"
            android:layout_width="wrap_content"
            android:text="@string/send"
            android:textColor="#FFFFFF"
            android:background="#404040"
            android:id="@+id/btnSendSMS"
            android:onClick="buttonClicked"
            android:layout_marginRight="5dp"/>

        <Button
            android:layout_height="wrap_content"
            android:layout_width="wrap_content"
            android:text="@string/clear"
            android:background="#FFFFFF"
            android:textColor="#404040"
            android:onClick="clearClicked"
            android:layout_marginLeft="5dp"/>

    </LinearLayout>

    <LinearLayout
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:orientation="horizontal"/>

</LinearLayout>

Answer 1

发送短信并通过Broadcast获取结果是Asynchronous操作。在调用sendSMS(phoneNo, message)方法后，您正在休眠1秒钟。没有保证你会在1秒内得到结果。假设您发送了一个短信，并且需要1.5秒才能获得结果，因为在这种情况下，您在响应之前写入数据，因为您等待1秒并写入数据。

收到回复后写入数据。在switch语句之后在onReceive方法内写入数据。

不要睡觉MainThread。它会造成糟糕的用户体验。避免这种做法。如果你需要等待完成的事情，请使用BackgroudnThread并在该线程上使用sleep。