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   源码介绍

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使用android studio，实现app获取手机联系人功能，即多个应用之间数据获取

package com.example.lyfesho.contactstest;

import android.database.Cursor;
import android.provider.ContactsContract;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    ListView contactsView;
    ArrayAdapter<String> adapter;
    List<String> contactsList = new ArrayList<String>();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        contactsView = (ListView) findViewById(R.id.contacts_view);
        adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,contactsList);
        contactsView.setAdapter(adapter);
        readContacts();   //后面定义
    }

    private void readContacts(){
        Cursor cursor = null;
        try{
            cursor = getContentResolver().query(
                    ContactsContract.CommonDataKinds.Phone.CONTENT_URI,null, null, null,null
            );
            while(cursor.moveToNext()){
                String displayName = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
                String number = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
                contactsList.add(displayName "\n" number);
            }
            }catch (Exception e){
            e.printStackTrace();
        }finally {
            if(cursor != null){
                cursor.close();
            }
        }
    }
}