我正在尝试显示当前在范围内的特定Wi-Fi SSID,显示在我的“活动”中,但没有显示任何内容。在当前状态下,我获得了连接的SSID,但我想知道SSID是否在范围内,也是可用并且没有连接。此后,此SSID将显示在我的xml文件中。
public String getCurrentSsid(Context context) {
String ssid = null;
// Check wheather the WIFI is available.
ConnectivityManager connManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connManager
.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
if (networkInfo.isAvailable()) {
// get the wifi name
final WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
final WifiInfo connectionInfo = wifiManager.getConnectionInfo();
if(connectionInfo != null && !TextUtils.isEmpty(connectionInfo.getSSID())){
ssid = connectionInfo.getSSID();
textWifi.setText(ssid);
}
}
return ssid;
}

答案 0 :(得分:0)
我刚刚测试了你的代码,它对我有用。它显示当前连接的SSID。
编辑:您的代码显示当前连接的SSID(如果已连接),现在看起来您想要获取当前范围内所有SSID的列表。
确保正确设置AndroidManifest.xml:
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
编辑2:现在很清楚你想要获得扫描结果并处理它们,我只是想出了这个简单的例子:
import android.net.wifi.ScanResult;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
import java.util.List;
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView text = (TextView) this.findViewById(R.id.ScanResults);
WifiManager wifiManager = (WifiManager) this.getSystemService(this.WIFI_SERVICE);
WifiInfo info = wifiManager.getConnectionInfo();
final List<ScanResult> results = wifiManager.getScanResults();
if (results != null) {
StringBuffer buf = new StringBuffer();
for (int i = 0; i < results.size(); i++) {
String ssid = results.get(i).SSID;
if (ssid.startsWith("sv-")) {
buf.append(ssid + "\n");
}
}
text.setText(buf.toString());
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
在activity_main.xml中:
<TextView
android:id="@+id/ScanResults"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />