Android 实现读取通讯录并上传服务器

关键技术

 - 内容解析者Resolver
 - ListView
 - Socket网络编程

权限申请

//需要在Manifest.xml文件中申请权限
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.INTERNET" />

布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:orientation="vertical"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
<Button
    android:id="@+id/btn"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="读取联系人"
    android:textSize="20sp"/>
    <ListView
        android:id="@+id/listview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"

        />

</LinearLayout>

这里的布局就很简单，一个按钮和一个ListView组件

main_activity文件

package com.example.resolver;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;

import android.Manifest;
import android.content.ContentResolver;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.os.Bundle;

import android.provider.ContactsContract;

import android.view.View;

import android.widget.ArrayAdapter;

import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import java.io.File;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.List;

import static android.provider.ContactsContract.CommonDataKinds.Phone.CONTENT_URI;
import static android.provider.ContactsContract.CommonDataKinds.Phone.NUMBER;


public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    Button btn;
    TextView lv;
    ContentResolver resolver;
    ListView listView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn = findViewById(R.id.btn);
//        lv=findViewById(R.id.lv);
        listView = findViewById(R.id.listview);
        resolver = this.getContentResolver();
        btn.setOnClickListener(this);

    }
   @Override
    public void onClick(View v) {
        if (v.getId() == R.id.btn) {
           //需要动态申请权限，适用于Android 6.0以上版本
            ActivityCompat.requestPermissions(this, new String[]{
                    Manifest.permission.READ_CONTACTS,Manifest.permission.INTERNET}, 1);
        }
    }

    @Override
  
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == 1) {
            for (int i = 0; i < permissions.length; i++) {
                if (grantResults[i] == PackageManager.PERMISSION_GRANTED) {

                    readContacts();//读取联系人

                } else {
                    Toast.makeText(this, "未授权读取联系人", Toast.LENGTH_LONG).show();
                }
            }
        }
    }

    private void readContacts() {
        List<ContactInfo> contactInfos = new ArrayList<>();
       //创建游标对查询通讯录信息
        Cursor cursor = resolver.query(CONTENT_URI,
                null, null, null, null);
        while (cursor.moveToNext()) {
            if (cursor != null) {
                String Number = cursor.getString(cursor.getColumnIndexOrThrow(NUMBER));
                String name = cursor.getString(cursor.getColumnIndex(ContactsContract.PhoneLookup.DISPLAY_NAME));
                ContactInfo contactInfo = new ContactInfo(name, Number);
                contactInfos.add(contactInfo);

            }
        }
        cursor.close();
        String[] data = new String[contactInfos.size()];
        int count = 0;
        //将列表contactInfos的数据填充进一个数组，方便后面将联系人信息填入ListView
        for (ContactInfo info : contactInfos) {
            data[count] = info.getName() + "电话:" + info.getNumber();
            count += 1;
        }
        ContactUpload contactUpload=new ContactUpload(data);//上传联系人信息，需要单独创建一个实体类
        //创建适配器对象，将联系人填入ListView组件中去
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, data);
        listView.setAdapter(adapter);
    }


}

上传通讯录：contactUpload

package com.example.resolver;

import java.io.IOException;
import java.io.OutputStream;
import java.net.Socket;


public class ContactUpload {

    public ContactUpload(final String[] contact) {
        //创建一个线程用于实现上传通讯录，否则会报错
        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    //创建Socket对象，绑定IP地址、端口号
                    Socket socket = new Socket("192.168.137.1", 6800);
                    OutputStream outputStream = socket.getOutputStream();
                    for (int i = 0; i < contact.length; i++) {
                        outputStream.write((contact[i] + "\n").getBytes());
                    }

                    outputStream.close();

                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }).start();

    }
    
}

服务端数据

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

/**
 * Created by 29173 on 2020/4/12.
 */

public class server {
    public static void main(String[] args) {

            try {
                ServerSocket ss = new ServerSocket(6800);
                Socket socket = ss.accept();
                InputStream is = socket.getInputStream();


                    byte[] bytes = new byte[1024];
                    int len;
                    StringBuilder sb = new StringBuilder();

                    while ((len = is.read(bytes)) != -1) {

                        sb.append(new String(bytes, 0, len, "UTF-8"));

                    }
                    String userID=UserID();
                    File file = new File(userID+".txt");
                    FileOutputStream fis = new FileOutputStream(file);

                    StringBuffer sbf = new StringBuffer(sb);
                    fis.write(sb.toString().getBytes());
                    System.out.println(sb);
                    socket.shutdownInput();


            } catch (IOException e) {
                e.printStackTrace();
            }

        }
    public static String UserID(){


        String date= LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyyMMdd"));
        String userID=date.toString();

        return userID;
    }
    }

结束

这个项目总体上来说非常简单，入门实践作品，Android开发中很容易遇到各种坑，欢迎联系我，相互交流学习经验。
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