知识点：

1 使用Intent在不同的Activity间传递数据

2 读取sqlite数据库中的联系人数据

1 使用Intent在不同的Activity间传递数据

1 在编号为A的Activity中使用startActivityForResult开启编号为B的Activity

startActivityForResult(new Intent(SetupActivity3.this,ReadContactActivity.class),0);

2 在编号为B的Activity中给Intent添加数据;

Intent intent = new Intent();
				intent.putExtra("phone",listContact.get(position).contactphone);
				setResult(0,intent);

3 在编号为A的onActivityResult中得到返回数据

@Override
	protected void onActivityResult(int requestCode,int resultCode,Intent data) {
		System.out.println(" resultCode : "+resultCode);
		String phonenum =data.getStringExtra("phone");
		et_choice_contact.setText(phonenum);
		super.onActivityResult(requestCode,resultCode,data);		
	}

2 读取sqlite数据库中的联系人数据

1 建立一个联系人信息类

public class ContactInfo {
	public String contactId ;
	public String contactname;	
	public String contactphone;
}

2 读取数据库中的联系人信息：

package com.example.mobliesoft.ReadLib;

import java.util.ArrayList;
import java.util.HashMap;

import android.content.Context;
import android.database.Cursor;
import android.net.Uri;

public class ReadFormLib {
	/**
	 * 读取联系人信息
	 * @return ArrayList<HashMap>
	 */

	public ArrayList<ContactInfo>  ReadContact(Context context)  {
		
		ArrayList<HashMap> ListofContact =new ArrayList<HashMap>();

		ArrayList<ContactInfo> ListofContact2 =new ArrayList<ContactInfo>();
		
		Uri rawContactsUri = Uri.parse("content://com.android.contacts/raw_contacts");
		Uri dataUri = Uri.parse("content://com.android.contacts/data");

	
		// 读取raw_contact 表
		Cursor rawContactsCursor = context.getContentResolver().query(rawContactsUri,new String[] { "contact_id","display_name" },null,null);

		if (rawContactsCursor != null) {
			while (rawContactsCursor.moveToNext()) {
				String contactId = rawContactsCursor.getString(0);
				String contactname = rawContactsCursor.getString(1);			
				//System.out.println(contactId + " ; " + contactname + " ; ");

				// 读取data 表 注意实际读的是view_data的虚表
				Cursor datacursor = context.getContentResolver().query(dataUri,new String[] { "data1","mimetype" },"contact_id=?",new String []{contactId},null);
			
				HashMap<String,String> Contactpeople=new HashMap<String,String>();
				ContactInfo contactInfo = new ContactInfo();
				
				if (datacursor != null) {
					while (datacursor.moveToNext()) {
						String data1 = datacursor.getString(0);
						String minetype = datacursor.getString(1);
						//System.out.println( contactId+"  ; "+data1+" ; "+ minetype);
						if (minetype.equals("vnd.android.cursor.item/phone_v2")) {
							Contactpeople.put(contactname,data1.replace("-","").replace(" ","").trim());
							contactInfo.contactId=contactId;
							contactInfo.contactname=contactname;
							contactInfo.contactphone=data1.replace("-","").trim();
							ListofContact.add(Contactpeople);
							ListofContact2.add(contactInfo);
						} 
					}
				}
				datacursor.close();
			}
			rawContactsCursor.close();			
		}
		return ListofContact2;
	}

}