我正在开发一个应用程序，首先我们必须搜索并连接可用的 wifi 网络。我已经显示了wifi网络列表。所以，我想从那个列表中连接那个特定的 wifi。
我的代码如下....
public class MainActivity extends Activity {
private ArrayAdapter<String> mPairedDevicesArrayAdapter;
ListView mPairedListView = null;
WifiConfiguration conf;
WifiManager wifiManager;
// /// ------------------------------------ NETWORK CREDENTIALS
String networkSSID = "your SSID";
String networkPass = "password";
// /// ------------------------------------ NETWORK CREDENTIALS
Button btn_refresh;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
conf = new WifiConfiguration();
wifiManager = (WifiManager) getApplicationContext().getSystemService(
Context.WIFI_SERVICE);
// Connected Wifi information ......................
// WifiManager wifiManager = (WifiManager)
// getSystemService(WIFI_SERVICE);
// WifiInfo wifiInfo = wifiManager.getConnectionInfo();
// Log.d("wifiInfo", wifiInfo.toString());
// Log.d("SSID", wifiInfo.getSSID());
mPairedDevicesArrayAdapter = new ArrayAdapter<String>(this,
R.layout.device_name);
mPairedListView = (ListView) findViewById(R.id.paired_devices);
btn_refresh = (Button) findViewById(R.id.btn_refresh);
btn_refresh.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(MainActivity.this, MainActivity.class);
startActivity(i);
}
});
mPairedListView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1,
final int position, long arg3) {
LayoutInflater factory = LayoutInflater.from(MainActivity.this);
final View textEntryView = factory.inflate(
R.layout.password_layout, null);
AlertDialog.Builder alert = new AlertDialog.Builder(
MainActivity.this);
alert.setTitle("Enter your data");
alert.setView(textEntryView);
final EditText edt_pass = (EditText) textEntryView
.findViewById(R.id.edt_pass);
edt_pass.setText("");
alert.setPositiveButton("Ok",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
dialog.cancel();
String SSID[] = mPairedListView
.getItemAtPosition(position).toString()
.split("\n");
networkSSID = SSID[1];
Log.i("networkSSID == ", "" + networkSSID);
conf.SSID = "\"" + networkSSID + "\"";
// conf.preSharedKey = "\"" +
// edt_pass.getText().toString() + "\"";
wifiManager.addNetwork(conf);
List<WifiConfiguration> list = wifiManager
.getConfiguredNetworks();
Log.i("List : ", "" + list);
for (WifiConfiguration i : list) {
if (i.SSID != null
&& i.SSID.equals("\"" + networkSSID
+ "\"")) {
wifiManager.disconnect();
Log.i("i.networkId : ", ""
+ i.networkId);
wifiManager.enableNetwork(i.networkId,
true);
wifiManager.reconnect();
break;
}
}
}
});
alert.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
dialog.cancel();
String path = "/mnt/sdcard/testpdf.pdf";
File f = new File(path); //
Uri imageUri = Uri.fromFile(f);
Intent printIntent = new Intent(
MainActivity.this,
PrintDialogActivity.class);
printIntent.setDataAndType(imageUri,
"application/pdf");
printIntent.putExtra("title", "Mitul Doc");
startActivity(printIntent);
}
});
alert.show();
}
});
WifiScan();
}
private void WifiScan() {
if (wifiManager.isWifiEnabled() == true) {
getCurrentSsid(MainActivity.this);
mPairedListView.setAdapter(mPairedDevicesArrayAdapter);
} else {
AlertDialog.Builder builder = new AlertDialog.Builder(
MainActivity.this);
builder.setMessage("Not Connected..Do you want to enable it?")
.setCancelable(false)
.setPositiveButton("YES",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int id) {
dialog.cancel();
new Get_Wifi().execute("");
}
})
.setNegativeButton("No",
new DialogInterface.OnClickListener() {
public void onClick(
final DialogInterface dialog,
final int id) {
dialog.cancel();
}
});
AlertDialog alert = builder.create();
alert.show();
}
}
private class Get_Wifi extends AsyncTask<String, Void, Boolean> {
ProgressDialog dialog;
@Override
protected void onPreExecute() {
dialog = ProgressDialog.show(MainActivity.this, "Wi-Fi",
"Loading...", true, false);
}
@Override
protected Boolean doInBackground(String... params) {
Boolean success = false;
try {
wifiManager.setWifiEnabled(true);
long timeStarted = System.currentTimeMillis();
while (System.currentTimeMillis() - timeStarted < 10000) {
try {
Thread.sleep(100);
getCurrentSsid(MainActivity.this);
} catch (InterruptedException e) {
Log.e("", "thread interrupted", e);
}
}
} catch (Exception e) {
e.printStackTrace();
}
return success;
}
@Override
protected void onPostExecute(Boolean success) {
dialog.dismiss();
super.onPostExecute(success);
try {
mPairedListView.setAdapter(mPairedDevicesArrayAdapter);
} catch (Exception e) {
e.printStackTrace();
}
}
}
public String getCurrentSsid(Context context) {
String ssid = null;
ConnectivityManager connManager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connManager
.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
if (networkInfo.isConnected()) {
final WifiManager wifiManager = (WifiManager) context
.getSystemService(Context.WIFI_SERVICE);
final WifiInfo connectionInfo = wifiManager.getConnectionInfo();
if (connectionInfo != null
&& !(connectionInfo.getSSID().equals(""))) {
// if (connectionInfo != null &&
// !StringUtil.isBlank(connectionInfo.getSSID())) {
ssid = connectionInfo.getSSID();
}
// Get WiFi status MARAKANA
WifiInfo info = wifiManager.getConnectionInfo();
String textStatus = "";
textStatus += "\n\nWiFi Status: " + info.toString();
String BSSID = info.getBSSID();
String MAC = info.getMacAddress();
List<ScanResult> results = wifiManager.getScanResults();
ScanResult bestSignal = null;
int count = 1;
String etWifiList = "";
for (ScanResult result : results) {
etWifiList += count++ + ". " + result.SSID + " : "
+ result.level + "\n" + result.BSSID + "\n"
+ result.capabilities + "\n"
+ "\n=======================\n";
mPairedDevicesArrayAdapter.add(result.SSID + "\n"
+ result.BSSID);
}
Log.v("", "from SO: \n" + etWifiList);
// List stored networks
List<WifiConfiguration> configs = wifiManager
.getConfiguredNetworks();
for (WifiConfiguration config : configs) {
textStatus += "\n\n" + config.toString();
}
Log.v("", "from marakana: \n" + textStatus);
}
return ssid;
}}
布局 ：
活动主：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<Button
android:id="@+id/btn_refresh"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Refresh" />
<ListView
android:id="@+id/paired_devices"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_margin="10dp"
android:layout_marginBottom="10dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_weight="1"
android:smoothScrollbar="true" />
设备名称 ：
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/title_paired_devices"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="left"
android:padding="5dip"
android:textSize="18dip" />
密码布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<EditText
android:id="@+id/edt_pass"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:gravity="center_vertical"
android:hint="Wifi password"
android:inputType="text"
android:padding="5dp"
android:singleLine="true"
android:textSize="15sp" />
打印对话框：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<WebView
android:id="@+id/webview"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />