This article describes the Android programming method to implement wifi scanning and connection. Share it for your reference, as follows:
Main interface, search for nearby WIFI information
/**
* Search WIFI and show in ListView
*
*/
public class MainActivity extends Activity implements OnClickListener,
OnItemClickListener {
private Button search_btn;
private ListView wifi_lv;
private WifiUtils mUtils;
private List<String> result;
private ProgressDialog progressdlg = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
(savedInstanceState);
setContentView(.activity_main);
mUtils = new WifiUtils(this);
findViews();
setLiteners();
}
private void findViews() {
this.search_btn = (Button) findViewById(.search_btn);
this.wifi_lv = (ListView) findViewById(.wifi_lv);
}
private void setLiteners() {
search_btn.setOnClickListener(this);
wifi_lv.setOnItemClickListener(this);
}
@Override
public void onClick(View v) {
if (() == .search_btn) {
showDialog();
new MyAsyncTask().execute();
}
}
/**
* init dialog and show
*/
private void showDialog() {
progressdlg = new ProgressDialog(this);
(false);
(false);
(ProgressDialog.STYLE_SPINNER);
(getString(.wait_moment));
();
}
/**
* dismiss dialog
*/
private void progressDismiss() {
if (progressdlg != null) {
();
}
}
class MyAsyncTask extends AsyncTask<Void, Void, Void> {
@Override
protected Void doInBackground(Void... arg0) {
//Scan nearby WIFI information result = ();
return null;
}
@Override
protected void onPostExecute(Void result) {
(result);
progressDismiss();
initListViewData();
}
}
private void initListViewData() {
if (null != result && () > 0) {
wifi_lv.setAdapter(new ArrayAdapter<String>(
getApplicationContext(), .wifi_list_item,
, result));
} else {
wifi_lv.setEmptyView(findViewById(.list_empty));
}
}
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
TextView tv = (TextView) ();
if (!(().toString())) {
Intent in = new Intent(, );
("ssid", ().toString());
startActivity(in);
}
}
}
/**
* Connect to the specified WIFI
*
*/
public class WifiConnectActivity extends Activity implements OnClickListener {
private Button connect_btn;
private TextView wifi_ssid_tv;
private EditText wifi_pwd_tv;
private WifiUtils mUtils;
// wifi ssid private String ssid;
private String pwd;
private ProgressDialog progressdlg = null;
@SuppressLint("HandlerLeak")
private Handler mHandler = new Handler() {
public void handleMessage( msg) {
switch () {
case 0:
showToast("WIFI connection is successful");
finish();
break;
case 1:
showToast("WIFI connection failed");
break;
}
progressDismiss();
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
(savedInstanceState);
setContentView(.activity_connect);
mUtils = new WifiUtils(this);
findViews();
setLiteners();
initDatas();
}
/**
* init dialog
*/
private void progressDialog() {
progressdlg = new ProgressDialog(this);
(false);
(false);
(ProgressDialog.STYLE_SPINNER);
(getString(.wait_moment));
();
}
/**
* dissmiss dialog
*/
private void progressDismiss() {
if (progressdlg != null) {
();
}
}
private void initDatas() {
ssid = getIntent().getStringExtra("ssid");
if (!(ssid)) {
ssid = ("\"", "");
}
this.wifi_ssid_tv.setText(ssid);
}
private void findViews() {
this.connect_btn = (Button) findViewById(.connect_btn);
this.wifi_ssid_tv = (TextView) findViewById(.wifi_ssid_tv);
this.wifi_pwd_tv = (EditText) findViewById(.wifi_pwd_tv);
}
private void setLiteners() {
connect_btn.setOnClickListener(this);
}
@Override
public void onClick(View v) {
if (() == .connect_btn) {// Next steps pwd = wifi_pwd_tv.getText().toString();
// Determine password input if ((pwd)) {
(this, "Please enter your wifi password", Toast.LENGTH_SHORT).show();
return;
}
progressDialog();
// Handle various business in child thread dealWithConnect(ssid, pwd);
}
}
private void dealWithConnect(final String ssid, final String pwd) {
new Thread(new Runnable() {
@Override
public void run() {
();
// Check whether the password is entered correctly boolean pwdSucess = (ssid, pwd);
try {
(4000);
} catch (Exception e) {
();
}
if (pwdSucess) {
(0);
} else {
(1);
}
}
}).start();
}
private void showToast(String str) {
(, str, Toast.LENGTH_SHORT).show();
}
}
Tools:
public class WifiUtils {
// Context object private Context mContext;
// WifiManager object private WifiManager mWifiManager;
public WifiUtils(Context mContext) {
= mContext;
mWifiManager = (WifiManager) mContext
.getSystemService(Context.WIFI_SERVICE);
}
/**
* Determine whether the phone is connected to Wifi
*/
public boolean isConnectWifi() {
// Get ConnectivityManager object ConnectivityManager conMgr = (ConnectivityManager) mContext
.getSystemService(Context.CONNECTIVITY_SERVICE);
// Get NetworkInfo object NetworkInfo info = ();
// The way to get the connection is wifi State wifi = (ConnectivityManager.TYPE_WIFI)
.getState();
if (info != null && () && wifi == )
{
return true;
} else {
return false;
}
}
/**
* Get the wifi information connected to the current mobile phone
*/
public WifiInfo getCurrentWifiInfo() {
return ();
}
/**
* Add a network and connect to the incoming parameter: WifiConfiguration occurs in WIFI
*/
public boolean addNetwork(WifiConfiguration wcg) {
int wcgID = (wcg);
return (wcgID, true);
}
/**
* Search for nearby hotspot information and return SSID collection data with all hotspots as information
*/
public List<String> getScanWifiResult() {
// Scanned hotspot data List<ScanResult> resultList;
// Start scanning hotspots ();
resultList = ();
ArrayList<String> ssids = new ArrayList<String>();
if (resultList != null) {
for (ScanResult scan : resultList) {
();// traverse the data and obtain the ssid data set }
}
return ssids;
}
/**
* Connect to wifi Parameters: wifi ssid and wifi password
*/
public boolean connectWifiTest(final String ssid, final String pwd) {
boolean isSuccess = false;
boolean flag = false;
();
boolean addSucess = addNetwork(CreateWifiInfo(ssid, pwd, 3));
if (addSucess) {
while (!flag && !isSuccess) {
try {
(10000);
} catch (InterruptedException e1) {
();
}
String currSSID = getCurrentWifiInfo().getSSID();
if (currSSID != null)
currSSID = ("\"", "");
int currIp = getCurrentWifiInfo().getIpAddress();
if (currSSID != null && (ssid) && currIp != 0) {
isSuccess = true;
} else {
flag = true;
}
}
}
return isSuccess;
}
/**
* Create WifiConfiguration object. It can be divided into three situations: 1. No password; 2. Encrypted with wep; 3. Encrypted with wpa.
*
* @param SSID
* @param Password
* @param Type
* @return
*/
public WifiConfiguration CreateWifiInfo(String SSID, String Password,
int Type) {
WifiConfiguration config = new WifiConfiguration();
();
();
();
();
();
= "\"" + SSID + "\"";
WifiConfiguration tempConfig = (SSID);
if (tempConfig != null) {
();
}
if (Type == 1) // WIFICIPHER_NOPASS
{
[0] = "";
();
= 0;
}
if (Type == 2) // WIFICIPHER_WEP
{
= true;
[0] = "\"" + Password + "\"";
.set();
();
();
(.WEP40);
.set(.WEP104);
();
= 0;
}
if (Type == 3) // WIFICIPHER_WPA
{
= "\"" + Password + "\"";
= true;
.set();
();
(.WPA_PSK);
.set();
// ();
();
.set();
= ;
}
return config;
}
private WifiConfiguration IsExsits(String SSID) {
List<WifiConfiguration> existingConfigs = mWifiManager
.getConfiguredNetworks();
for (WifiConfiguration existingConfig : existingConfigs) {
if (("\"" + SSID + "\"")) {
return existingConfig;
}
}
return null;
}
}
——Related layout files———
Main page
<RelativeLayout xmlns:andro
xmlns:tools="/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<Button
android:
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:text="Search for nearby WIFI"
android:textSize="16sp" >
</Button>
<ListView
android:
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/search_btn"
android:layout_marginTop="10dp"
android:divider="#d1d1d1"
android:dividerHeight="1px"
android:scrollbars="none" >
</ListView>
</RelativeLayout>
Connection page
<RelativeLayout xmlns:andro
xmlns:tools="/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:padding="10dp"
android:text="@string/wifi_ssid"
android:textSize="16sp" />
<TextView
android:
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:layout_toRightOf="@id/wifi_ssid"
android:padding="10dp"
android:textSize="16sp" />
<TextView
android:
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/wifi_ssid"
android:layout_marginTop="15dp"
android:padding="10dp"
android:text="@string/wifi_pwd"
android:textSize="16sp" />
<EditText
android:
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/wifi_ssid_tv"
android:layout_marginRight="15dp"
android:layout_marginTop="15dp"
android:layout_toRightOf="@id/wifi_pwd"
android:hint="@string/input_pwd_hint"
android:padding="10dp"
android:textSize="16sp" />
<Button
android:
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_margin="10dp"
android:text="Connect WIFI"
android:textSize="16sp" >
</Button>
</RelativeLayout>
The item of the main page ListView
<RelativeLayout xmlns:andro
xmlns:tools="/tools"
android:layout_width="match_parent"
android:layout_height="40dp"
android:background="#FFFFFF" >
<TextView
android:
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerInParent="true"
android:paddingLeft="15dp"
android:textColor="#333333"
android:textSize="16sp" />
</RelativeLayout>
The main interface has not been searched. WIFI display is reached.
<RelativeLayout xmlns:andro
xmlns:tools="/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FFFFFF" >
<TextView
android:
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="No WIFI nearby"
android:textColor="#333333"
android:textSize="16sp" />
</RelativeLayout>
DEMO download address on github:/ldm520/WIFI_TOOL
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I hope this article will be helpful to everyone's Android programming design.