【实例简介】

【实例截图】

【核心代码】

package pip.Wifi;

import wyf.wpf.R;

import wyf.wpf.choosecontactlocal;

import android.app.Activity;

import android.app.AlertDialog;

import android.app.Dialog;

import android.content.Context;

import android.content.DialogInterface;

import android.content.Intent;

import android.content.DialogInterface.OnClickListener;

import android.net.wifi.WifiInfo;

import android.net.wifi.WifiManager;

import android.os.Build;

import android.os.Bundle;

import android.view.View;

import android.widget.EditText;

import android.widget.TextView;

import android.widget.Toast;

public class WifiStart extends Activity {

private static final int OPEN = 1;

private static final int SERVEROPEN = 2;

private static final int MODIFYOPEN = 3;

private WifiManager mWifiManager;

private WifiInfo mWifiInfo;

private TextView usernametext = null;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.wifistart); // 设置当前屏幕

mWifiManager = (WifiManager) this

.getSystemService(Context.WIFI_SERVICE);

mWifiInfo = mWifiManager.getConnectionInfo();

String ip = intToIp(mWifiInfo.getIpAddress());

usernametext = (TextView) findViewById(R.id.username);

usernametext.setText(Build.MODEL);

Toast.makeText(WifiStart.this, ip, Toast.LENGTH_SHORT).show();

}

/************** 点击了“发送Wifi文件” ***************/

public void StartButton(View view) {

if (mWifiManager.getWifiState() != WifiManager.WIFI_STATE_ENABLED) {

showDialog(OPEN);// 调用onCreateDialog

} else {

Intent i = new Intent(WifiStart.this, WifiUserList.class);

// Intent i = new Intent(WifiStart.this, choosecontactlocal.class);

i.putExtra("username", usernametext.getText().toString());

startActivity(i);

}

}

/************** 点击了“接收Wifi文件” ***************/

public void ReceiveButton(View view) {

if (mWifiManager.getWifiState() != WifiManager.WIFI_STATE_ENABLED) {

showDialog(SERVEROPEN);// 调用onCreateDialog

} else {

Intent intent = new Intent(WifiStart.this, WifiReceive.class);

intent.putExtra("username", usernametext.getText().toString());

startActivity(intent);

}

}

/************** 点击了“修改您的用户名” ***************/

public void ModifyButton(View view) {

showDialog(MODIFYOPEN);// 调用onCreateDialog

}

/************** 提示是否打开Wifi提示框 ***************/

protected Dialog onCreateDialog(int id) {

switch (id) {

case OPEN:

return new AlertDialog.Builder(WifiStart.this).setTitle("温馨提示")

.setMessage("您的WiFi处于关闭状态，是否打开？").setIcon(

android.R.drawable.ic_dialog_info)

.setPositiveButton("打开", new OnClickListener() {

public void onClick(DialogInterface dialog, int which) {

mWifiManager.setWifiEnabled(true);

Toast.makeText(WifiStart.this, "已为您启动WiFi服务",

Toast.LENGTH_SHORT).show();

Intent i = new Intent(WifiStart.this,

WifiUserList.class);

startActivity(i);

}

}).setNegativeButton("取消", new OnClickListener() {

public void onClick(DialogInterface dialog, int which) {

Toast.makeText(WifiStart.this, "您的WiFi服务未启动",

Toast.LENGTH_SHORT).show();

}

}).create();

case SERVEROPEN:

return new AlertDialog.Builder(WifiStart.this).setTitle("温馨提示")

.setMessage("您的WiFi处于关闭状态，是否打开？").setIcon(

android.R.drawable.ic_dialog_info)

.setPositiveButton("打开", new OnClickListener() {

public void onClick(DialogInterface dialog, int which) {

mWifiManager.setWifiEnabled(true);

Toast.makeText(WifiStart.this, "已为您启动WiFi服务",

Toast.LENGTH_SHORT).show();

Intent i = new Intent(WifiStart.this,

WifiReceive.class);

startActivity(i);

}

}).setNegativeButton("取消", new OnClickListener() {

public void onClick(DialogInterface dialog, int which) {

Toast.makeText(WifiStart.this, "您的WiFi服务未启动",

Toast.LENGTH_SHORT).show();

}

}).create();

case MODIFYOPEN:

// 新建一个编辑框，默认显示设备名称 "_"

final EditText deviceTypeEdit = new EditText(this);

deviceTypeEdit.setText(Build.MODEL);

// 把光标定位到最后一个字符后面

deviceTypeEdit.setSelection(Build.MODEL.length());

// 弹出对话框要求用户输入设备型号或标识

new AlertDialog.Builder(this).setTitle("请输入设备型号或标识：").setView(

deviceTypeEdit).setPositiveButton("确定",

new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog, int which) {

// 获取用户输入后的设备类型

String devicetype = deviceTypeEdit.getText()

.toString().trim();

usernametext.setText(devicetype);

}

}).setNegativeButton("取消", null).show();

default:

return null;

}

}

private String intToIp(int i) {

return (i & 0xFF) "." ((i >> 8) & 0xFF) "." ((i >> 16) & 0xFF)

"." ((i >> 24) & 0xFF);

}

@Override

public void onBackPressed() {

// TODO Auto-generated method stub

super.onBackPressed();

}

@Override

protected void onStop() {

// TODO Auto-generated method stub

super.onStop();

}

}