txt 文件存储到 SD 卡后如何上传或发送

Question

我目前正在为我的 comp prog 课程开发我的第一个 Android 应用程序。该应用程序将联系人记录到 txt 文件中并将其存储在 SD 卡上。我可以手动检索文件，但我现在希望应用程序在创建 txt 文件后自动将其发送回给我。请问，最简单的方法是什么。我用的是日食。 txt 文件如何到达我手中并不重要，它只需要......这就是本课的重点。这工作正常，所有权限和东西都按顺序排列。 我需要知道要发送什么以及发送到哪里。还有其他权限吗？ 感谢您的帮助。提前致谢。凯文

 package com.lightcone.readcontacts;

       import java.io.File;
       import java.io.FileNotFoundException;
       import java.io.FileOutputStream;
       import java.io.IOException;
       import java.io.PrintWriter;

       import android.app.Activity;
       import android.content.ContentResolver;
       import android.database.Cursor;
       import android.net.Uri;
       import android.os.Bundle;
       import android.os.Environment;
       import android.provider.ContactsContract;
       import android.util.Log;
       import android.widget.TextView;
       import android.provider.ContactsContract.CommonDataKinds.StructuredPostal;

public class ReadContacts extends Activity {


      private static final Uri URI = ContactsContract.Contacts.CONTENT_URI;
      private static final Uri PURI = ContactsContract.CommonDataKinds.Phone.CONTENT_URI;
      private static final Uri EURI = ContactsContract.CommonDataKinds.Email.CONTENT_URI;
      private static final Uri AURI = ContactsContract.CommonDataKinds.StructuredPostal.CONTENT_URI;
      private static final String ID = ContactsContract.Contacts._ID;
      private static final String DNAME = ContactsContract.Contacts.DISPLAY_NAME;
      private static final String HPN = ContactsContract.Contacts.HAS_PHONE_NUMBER;
      private static final String LOOKY = ContactsContract.Contacts.LOOKUP_KEY;
      private static final String CID = ContactsContract.CommonDataKinds.Phone.CONTACT_ID;
      private static final String EID = ContactsContract.CommonDataKinds.Email.CONTACT_ID;
      private static final String AID = ContactsContract.CommonDataKinds.StructuredPostal.CONTACT_ID;
      private static final String PNUM = ContactsContract.CommonDataKinds.Phone.NUMBER;
      private static final String PHONETYPE = ContactsContract.CommonDataKinds.Phone.TYPE;
      private static final String EMAIL = ContactsContract.CommonDataKinds.Email.DATA;
      private static final String EMAILTYPE = ContactsContract.CommonDataKinds.Email.TYPE;
      private static final String STREET = ContactsContract.CommonDataKinds.StructuredPostal.STREET;
      private static final String CITY = ContactsContract.CommonDataKinds.StructuredPostal.CITY;
      private static final String STATE = ContactsContract.CommonDataKinds.StructuredPostal.REGION;
      private static final String POSTCODE = ContactsContract.CommonDataKinds.StructuredPostal.POSTCODE;
      private static final String COUNTRY = ContactsContract.CommonDataKinds.StructuredPostal.COUNTRY;

      private String id;
      private String lookupKey;
      private String name;
      private String street;
      private String city;
      private String state;
      private String postcode;
      private String country;
      private String ph[];
      private String phType[];
      private String em[];
      private String emType[];
      private File root;
      private int emcounter;
      private int phcounter;
      private int addcounter;
      private TextView tv;


      @Override
      public void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);
         setContentView(R.layout.main);
         tv = (TextView) findViewById(R.id.TextView01);

         em = new String[5];
         emType = new String[5];
         ph = new String[5];
         phType = new String[5];

         checkExternalMedia();

         File dir = new File (root.getAbsolutePath() + "/download");
         dir.mkdirs();
         File file = new File(dir, "phoneData.txt");
         tv.append("Wrote " +file+"\nfor following contacts:\n");

         try{
            FileOutputStream f = new FileOutputStream(file);
            PrintWriter pw = new PrintWriter(f);


            ContentResolver cr = getContentResolver();
            Cursor cu = cr.query(URI, null, null, null, null);
            if (cu.getCount() > 0) {    

               while (cu.moveToNext()) {    

                  street = "";
                  city = "";
                  state = "";
                  postcode = "";
                  country = "";

                  id = cu.getString(cu.getColumnIndex(ID));
                  name = cu.getString(cu.getColumnIndex(DNAME));          
                  lookupKey = cu.getString(cu.getColumnIndex(LOOKY));               
                  tv.append("\n"+id+" "+name); 


                  phcounter = 0;
                  if (Integer.parseInt(cu.getString(cu.getColumnIndex(HPN))) > 0) {             
                     Cursor pCur = cr.query(PURI,  null, CID + " = ?",  new String[]{id}, null);
                     while (pCur.moveToNext()) {
                        ph[phcounter] = pCur.getString(pCur.getColumnIndex(PNUM));
                        phType[phcounter]  = pCur.getString(pCur.getColumnIndex(PHONETYPE)); 
                        phcounter ++;
                     } 
                     pCur.close();
                  }


                  emcounter = 0;
                  Cursor emailCur = cr.query(EURI, null, EID + " = ?",  new String[]{id}, null); 
                  while (emailCur.moveToNext()) { 
                     em[emcounter] =  emailCur.getString(emailCur.getColumnIndex(EMAIL));
                     emType[emcounter] =  emailCur.getString(emailCur.getColumnIndex(EMAILTYPE));
                     emcounter ++;
                  } 
                  emailCur.close();


                  addcounter = 0;
                  Cursor addCur = cr.query(AURI, null, AID + " = ?",  new String[]{id}, null); 
                  while (addCur.moveToNext()) { 
                     street = addCur.getString(addCur.getColumnIndex(STREET));
                     city = addCur.getString(addCur.getColumnIndex(CITY));
                     state = addCur.getString(addCur.getColumnIndex(STATE));
                     postcode = addCur.getString(addCur.getColumnIndex(POSTCODE));
                     country = addCur.getString(addCur.getColumnIndex(COUNTRY));
                     addcounter ++;
                  } 
                  addCur.close();

                  pw.println(name+" ID="+id+" LOOKUP_KEY="+lookupKey);
                  for(int i=0; i<phcounter; i++){
                     pw.println("   phone="+ ph[i]+" type="+phType[i] + " ("
                        + getPhoneType(phType[i]) + ") ");
                  }
                  for(int i=0; i<emcounter; i++){
                     pw.println("   email="+ em[i]+" type="+emType[i] + " ("
                        + getEmailType(emType[i]) + ") ");
                  }
                  if(addcounter > 0){
                     if(street != null) pw.println("   street="+street);
                     if(city != null) pw.println("   city="+city);
                     if(state != null) pw.println("   state/region="+state);
                     if(postcode != null) pw.println("   postcode="+postcode);
                     if(country != null) pw.println("   country="+country);
                  }
               }
            }       
            pw.flush();
            pw.close();
            f.close();       
         } catch (FileNotFoundException e) {
            e.printStackTrace();
            Log.i("MEDIA", "*************** File not found. Did you" +
               " add a WRITE_EXTERNAL_STORAGE permission to the manifest file? ");
         } catch (IOException e) {
               e.printStackTrace();
         }  
      }



      private void checkExternalMedia () {
         boolean mExternalStorageAvailable = false;
         boolean mExternalStorageWriteable = false;
         String state = Environment.getExternalStorageState();

         if (Environment.MEDIA_MOUNTED.equals(state)) {
            mExternalStorageAvailable = mExternalStorageWriteable = true;
         } else if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) {
            mExternalStorageAvailable = true;
            mExternalStorageWriteable = false;
         } else {
            mExternalStorageAvailable = mExternalStorageWriteable = false;
         }

         root = android.os.Environment.getExternalStorageDirectory(); 
         tv.append( "External storage: Exists="+mExternalStorageAvailable+", Writable="
                  +mExternalStorageWriteable+" Root="+root+"\n");
      }



      private String getPhoneType(String index){
         if(index.trim().equals( "1")){
            return "home";
         } else if (index.trim().equals("2")){
            return "mobile";
         } else if (index.trim().equals("3")){
            return "work";
         } else if (index.trim().equals("7")){
            return "other";
         } else {
            return "?";
         }
      }  


      private String getEmailType(String index){
         if(index.trim().equals( "1")){
            return "home";
         } else if (index.trim().equals("2")){
            return "work";
         } else if (index.trim().equals("3")){
            return "other";
         } else if (index.trim().equals("4")){
            return "mobile";
         } else {
            return "?";
         }
      }
   }