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    ▪取得联系人姓名，相关电话以及邮件地址sdk2.0        获得联系人姓名，相关电话以及邮件地址sdk2.0 权限别忘记 <uses-permission android:name="android.permission.READ_CONTACTS" />   创建一个抽象类 并判断版本问题 abstract class ContactsAdapterBridge { abstract Lis.........
    ▪ listView中扩张ArrayAdapter，以及view的使用        listView中扩展ArrayAdapter，以及view的使用 public class SelectorDemo extends ListActivity { private static ColorStateList allWhite=ColorStateList.valueOf(0xFFFF0000); private static String[] items={"lorem", "ipsum", "dolor","purus"}; @Ov.........
    ▪ C/S通信，互传文件       C/S通讯，互传文件 上传或者下载文件客户端：package com.et.FileClient; import java.io.DataOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStream; import java.........

[1]取得联系人姓名，相关电话以及邮件地址sdk2.0
    来源: 互联网  发布时间: 2014-02-18
获得联系人姓名，相关电话以及邮件地址sdk2.0

权限别忘记

 <uses-permission android:name="android.permission.READ_CONTACTS" />

 

创建一个抽象类 并判断版本问题

abstract class ContactsAdapterBridge {
	abstract ListAdapter buildNameAdapter(Activity a);
	abstract ListAdapter buildPhonesAdapter(Activity a);
	abstract ListAdapter buildEmailAdapter(Activity a);
	
	public static final ContactsAdapterBridge INSTANCE=buildBridge();
	
	private static ContactsAdapterBridge buildBridge() {
		int sdk=new Integer(Build.VERSION.SDK).intValue();
		
		if (sdk<5) {
			return(new OldContactsAdapterBridge());
		}
		
		return(new NewContactsAdapterBridge());
	}
}

 

实现这个类

class NewContactsAdapterBridge extends ContactsAdapterBridge {
	
	ListAdapter buildNameAdapter(Activity a) {
		String[] PROJECTION=new String[] { 	Contacts._ID,	Contacts.DISPLAY_NAME,};
		Cursor c=a.managedQuery(Contacts.CONTENT_URI,PROJECTION, null, null, null);
		
		return(new SimpleCursorAdapter(	a,
																		android.R.layout.simple_list_item_1,
																		c,
																		new String[] {
																			Contacts.DISPLAY_NAME
																		},
																		new int[] {
																			android.R.id.text1
																		}));
	}
	
	ListAdapter buildPhonesAdapter(Activity a) {
		String[] PROJECTION=new String[] { 	Contacts._ID,	Contacts.DISPLAY_NAME,	Phone.NUMBER	};
		Cursor c=a.managedQuery(Phone.CONTENT_URI,PROJECTION, null, null, null);
		
		return(new SimpleCursorAdapter(	a,
																		android.R.layout.simple_list_item_2,
																		c,
																		new String[] {
																			Contacts.DISPLAY_NAME,
																			Phone.NUMBER
																		},
																		new int[] {
																			android.R.id.text1,
																			android.R.id.text2
																		}));
	}
	
	ListAdapter buildEmailAdapter(Activity a) {
		String[] PROJECTION=new String[] { 	Contacts._ID,Contacts.DISPLAY_NAME,Email.DATA};
		Cursor c=a.managedQuery(Email.CONTENT_URI,PROJECTION, null, null, null);
		
		return(new SimpleCursorAdapter(	a,
																		android.R.layout.simple_list_item_2,
																		c,
																		new String[] {
																			Contacts.DISPLAY_NAME,
																			Email.DATA
																		},
																		new int[] {
																			android.R.id.text1,
																			android.R.id.text2
																		}));
	}
}

 注意不同颜色就好了。

 

public class ContactSpinners extends ListActivity implements AdapterView.OnItemSelectedListener {
	private static String[] options={"Contact Names","Contact Names & Numbers","Contact Names & Email Addresses"};
	private ListAdapter[] listAdapters=new ListAdapter[3];

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		
		initListAdapters();
		
		Spinner spin=(Spinner)findViewById(R.id.spinner);
		spin.setOnItemSelectedListener(this);
		
		ArrayAdapter<String> aa=new ArrayAdapter<String>(this,
															android.R.layout.simple_spinner_item,
															options);
		
		aa.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
		spin.setAdapter(aa);
	}
	
	public void onItemSelected(AdapterView<?> parent,View v, int position, long id) {
		setListAdapter(listAdapters[position]);
	}
	
	public void onNothingSelected(AdapterView<?> parent) {
		// ignore
	}
	
	private void initListAdapters() {
		listAdapters[0]=ContactsAdapterBridge.INSTANCE.buildNameAdapter(this);
		listAdapters[1]=ContactsAdapterBridge.INSTANCE.buildPhonesAdapter(this);
		listAdapters[2]=ContactsAdapterBridge.INSTANCE.buildEmailAdapter(this);
	}
	
}

 

主程序就很简单了。

最后就是以前版本的查找联系人

class OldContactsAdapterBridge extends ContactsAdapterBridge {
	ListAdapter buildNameAdapter(Activity a) {
		String[] PROJECTION=new String[] { 	Contacts.People._ID,
																				Contacts.PeopleColumns.NAME
																			};
		Cursor c=a.managedQuery(Contacts.People.CONTENT_URI,
														PROJECTION, null, null,
														Contacts.People.DEFAULT_SORT_ORDER);
		
		return(new SimpleCursorAdapter(	a,
																		android.R.layout.simple_list_item_1,
																		c,
																		new String[] {
																			Contacts.PeopleColumns.NAME
																		},
																		new int[] {
																			android.R.id.text1
																		}));
	}
	
	ListAdapter buildPhonesAdapter(Activity a) {
		String[] PROJECTION=new String[] { 	Contacts.Phones._ID,
																				Contacts.Phones.NAME,
																				Contacts.Phones.NUMBER
																			};
		Cursor c=a.managedQuery(Contacts.Phones.CONTENT_URI,
														PROJECTION, null, null,
														Contacts.Phones.DEFAULT_SORT_ORDER);
		
		return(new SimpleCursorAdapter(	a,
																		android.R.layout.simple_list_item_2,
																		c,
																		new String[] {
																			Contacts.Phones.NAME,
																			Contacts.Phones.NUMBER
																		},
																		new int[] {
																			android.R.id.text1,
																			android.R.id.text2
																		}));
	}
	
	ListAdapter buildEmailAdapter(Activity a) {
		String[] PROJECTION=new String[] { 	Contacts.ContactMethods._ID,
																				Contacts.ContactMethods.DATA,
																				Contacts.PeopleColumns.NAME
																			};
		Cursor c=a.managedQuery(Contacts.ContactMethods.CONTENT_EMAIL_URI,
														PROJECTION, null, null,
														Contacts.ContactMethods.DEFAULT_SORT_ORDER);
		
		return(new SimpleCursorAdapter(	a,
																		android.R.layout.simple_list_item_2,
																		c,
																		new String[] {
																			Contacts.PeopleColumns.NAME,
																			Contacts.ContactMethods.DATA
																		},
																		new int[] {
																			android.R.id.text1,
																			android.R.id.text2
																		}));
	}
}

 要导入的包

import android.database.Cursor;
import android.provider.ContactsContract.Contacts;
import android.provider.ContactsContract.CommonDataKinds.Email;
import android.provider.ContactsContract.CommonDataKinds.Phone;

 


    
[2] listView中扩张ArrayAdapter，以及view的使用
    来源: 互联网  发布时间: 2014-02-18
listView中扩展ArrayAdapter，以及view的使用
public class SelectorDemo extends ListActivity {
	private static ColorStateList allWhite=ColorStateList.valueOf(0xFFFF0000);
	private static String[] items={"lorem", "ipsum", "dolor","purus"};
	
	@Override
	public void onCreate(Bundle icicle) {
		super.onCreate(icicle);
		setContentView(R.layout.main);
		setListAdapter(new SelectorAdapter(this));
		getListView().setOnItemSelectedListener(listener);
	}
	
	class SelectorAdapter extends ArrayAdapter {
		SelectorAdapter(Context ctxt) {
			super(ctxt,R.layout.row, items);
			
		}
		
		@Override
		public View getView(int position, View convertView,ViewGroup parent) {
			SelectorWrapper wrapper=null;
			
			if (convertView==null) {
				convertView=getLayoutInflater().inflate(R.layout.row,parent, false);
				wrapper=new SelectorWrapper(convertView);
				wrapper.getLabel().setTextColor(allWhite);
				convertView.setTag(wrapper);
			}
			else {
				wrapper=(SelectorWrapper)convertView.getTag();
			}
			
			wrapper.getLabel().setText(items[position]);
			
			return(convertView);
		}
	}
	
	class SelectorWrapper {
		View row=null;
		TextView label=null;
		View bar=null;
		
		SelectorWrapper(View row) {
			this.row=row;
		}
		
		TextView getLabel() {
			if (label==null) {
				label=(TextView)row.findViewById(R.id.label);
			}
			
			return(label);
		}
		
		View getBar() {
			if (bar==null) {
				bar=row.findViewById(R.id.bar);
			}
			
			return(bar);
		}
	}
	
	AdapterView.OnItemSelectedListener listener=new AdapterView.OnItemSelectedListener() {
		View lastRow=null;
		
		public void onItemSelected(AdapterView<?> parent, View view, int position,
													 long id) {
			Log.i("view","parent:"+parent+"view:"+view+position);
			
			if (lastRow!=null) {
				SelectorWrapper wrapper=(SelectorWrapper)lastRow.getTag();

				wrapper.getBar().setVisibility(View.INVISIBLE);
			}
			
				
			SelectorWrapper wrapper=(SelectorWrapper)view.getTag();
			
			wrapper.getBar().setVisibility(View.VISIBLE);
			lastRow=view;
		}
		
		public void onNothingSelected(AdapterView<?> parent) {
			//Log.i("onNothingSelected","parent:"+parent);
			if (lastRow!=null) {
				SelectorWrapper wrapper=(SelectorWrapper)lastRow.getTag();

				wrapper.getBar().setVisibility(View.INVISIBLE);
				lastRow=null;
			}
		
		}
	};
}

 main

<?xml version="1.0" encoding="utf-8"?>
<ListView
	xmlns:android="http://schemas.android.com/apk/res/android"
	android:id="@android:id/list"
	android:layout_width="fill_parent" 
	android:layout_height="fill_parent"
	android:listSelector="#00000000"
/>

 

最关键的就是下面的了

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
	xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="horizontal"
	android:layout_width="fill_parent" 
	android:layout_height="fill_parent" >
	<View
		android:id="@+id/bar"
		android:background="#FFFFFF00"
		android:layout_width="5px" 
		android:layout_height="fill_parent"
		android:visibility="invisible"
	/>
	<TextView
		android:id="@+id/label"
		android:layout_width="fill_parent" 
		android:layout_height="fill_parent"
		android:textSize="10pt"
		android:paddingTop="2px"
		android:paddingBottom="2px"
		android:paddingLeft="5px"
	/>
</LinearLayout>

 

这个view就是一条横线了而是一条竖线


    
[3] C/S通信，互传文件
    来源: 互联网  发布时间: 2014-02-18
C/S通讯，互传文件
上传或者下载文件客户端：
package com.et.FileClient;

import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.Socket;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class FileClient extends Activity {
    /** Called when the activity is first created. */
	
    private TextView textView;
    private Button download;
    private Button upload;
    
    
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        textView=(TextView) findViewById(R.id.textview);
        download=(Button) findViewById(R.id.Button01);
        upload = (Button) findViewById(R.id.Button02);
        download.setOnClickListener(new OnClickListener() {
			
			public void onClick(View v) {
				// TODO Auto-generated method stub
			try
			{
				Socket s=new Socket("116.29.62.23",5554);
				InputStream is=s.getInputStream();
				if (is==null)
				{
					throw new RuntimeException("stream is null");
				}
				File myTempFile = new File("/data/data/com.et.FileClient","a.jpg");
				FileOutputStream fos = new FileOutputStream(myTempFile);
				byte buf[]=new byte[1024];
				while (true)
				{
					int num = is.read(buf);
					if (num<=0)
						break;
					fos.write(buf, 0, num);
				}
				is.close();
				s.close();
			}
        catch(Exception e)
        {
        	System.out.println("发生异常:"+e);
			e.printStackTrace();
        }
			}
		});
        
        upload.setOnClickListener(new View.OnClickListener() {
			
			public void onClick(View v) {
				// TODO Auto-generated method stub
				try
				{
					Socket s=new Socket("116.29.62.23",5554);
					File file = new File("/data/data/com.et.FileClient/image.jpg");
					FileInputStream fos = new FileInputStream(file);
					DataOutputStream out = new DataOutputStream(s.getOutputStream());
					byte[] buf = new byte[1024];
					int num = fos.read(buf);
					while (num!=-1)
					{
						out.write(buf, 0, num);
						out.flush();
						num=fos.read(buf);
					}
				}
				catch(Exception e)
				{
					
				}
			}
		});
    }
}

下载文件服务器端：
package com.et.FileClient;
import java.io.*;
import java.util.*;
import java.net.*;
public class FileDownServer {
public static void main(String[] args) throws Exception {

//创建文件流用来读取文件中的数据

File file = new File("a.jpg");

FileInputStream fos = new FileInputStream(file);
ServerSocket ss = new ServerSocket(5554);
//创建网络服务器接受客户请求
while (true)
{
	
	Socket client = ss.accept();
	System.out.println("accept");
	//创建网络输出流并提供数据包装器

	OutputStream netOut = client.getOutputStream();

	OutputStream doc = new DataOutputStream(
			new BufferedOutputStream(netOut));

	//创建文件读取缓冲区

	byte[] buf = new byte[2048];

	int num = fos.read(buf);
	while (num != (-1)) {//是否读完文件
		doc.write(buf, 0, num);//把文件数据写出网络缓冲区
		doc.flush();//刷新缓冲区把数据写往客户端
		num = fos.read(buf);//继续从文件中读取数据
	}
	fos.close();
	doc.close();
}
}


}

上传文件服务器端：
package com.et.FileClient;
import java.io.*;
import java.util.*;
import java.net.*;
public class FileUpServer {
public static void main(String[] args) throws Exception {

ServerSocket ss = new ServerSocket(5554);
//创建网络服务器接受客户请求
while (true)
{
	
	Socket s = ss.accept();
	System.out.println("accept");
	//创建网络输出流并提供数据包装器

	InputStream is=s.getInputStream();
	if (is==null)
	{
		throw new RuntimeException("stream is null");
	}
	File myTempFile = new File("image.jpg");
	FileOutputStream fos = new FileOutputStream(myTempFile);
	byte buf[]=new byte[1024];
	while (true)
	{
		int num = is.read(buf);
		if (num<=0)
			break;
		fos.write(buf, 0, num);
	}
		is.close();
		s.close();
}
}
}

    
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