我得到了这个代码,我想扫描网络,然后将其全部写入listview。但问题是ssid和bssid没有表现出来。其他一切都显示但不是ssid。
另外,每秒更新列表视图的最佳方法是什么,以便您可以看到信号强化实际信号?
import java.util.List;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import com.example.wifi.R;
public class MainActivity extends Activity {
WifiManager wifiManager;
WifiScanReceiver wifiReciever;
ListView list;
String wifis[];
WifiInfo wifiInfo;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
list = (ListView) findViewById(R.id.text);
wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
wifiReciever = new WifiScanReceiver();
wifiInfo = wifiManager.getConnectionInfo();
wifiManager.startScan();
}
protected void onPause() {
unregisterReceiver(wifiReciever);
super.onPause();
}
protected void onResume() {
registerReceiver(wifiReciever, new IntentFilter(
WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
super.onResume();
}
class WifiScanReceiver extends BroadcastReceiver {
@SuppressLint("UseValueOf")
public void onReceive(Context c, Intent intent) {
List<ScanResult> wifiScanList = wifiManager.getScanResults();
wifis = new String[wifiScanList.size()];
for (int i = 0; i < wifiScanList.size(); i++) {
wifis[i] = ((wifiScanList.get(i)).toString());
}
list.setAdapter(new ArrayAdapter<String>(getApplicationContext(),
android.R.layout.simple_list_item_1, wifis));
}
}
}
答案 0 :(得分:2)
您可以使用SSID
和BSSID
从ScanResult
对象获取wifiScanList.get(i).SSID
和wifiScanList.get(i).BSSID
。然后将其附加到从toString()
返回的其他数据。
首先,将您的ArrayAdapter
声明为实例变量,并在setAdapter()
中致电onCreate()
:
ArrayAdapter adapter;
ListView list;
ArrayList<String> wifis;
WifiInfo wifiInfo;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
list = (ListView) findViewById(R.id.text);
wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
wifiReciever = new WifiScanReceiver();
wifiInfo = wifiManager.getConnectionInfo();
wifis = new ArrayList<String>(); //initialize wifis
wifis.add("loading...");
adapter = new ArrayAdapter<String>(getApplicationContext(),
android.R.layout.simple_list_item_1, wifis)
list.setAdapter(adapter);
wifiManager.startScan(); //make sure this is the last call
}
修改后的BroadcastReceiver
:
class WifiScanReceiver extends BroadcastReceiver {
@SuppressLint("UseValueOf")
public void onReceive(Context c, Intent intent) {
List<ScanResult> wifiScanList = wifiManager.getScanResults();
//wifis = new String[wifiScanList.size()]; //remove this
wifis.clear(); //add this
for (int i = 0; i < wifiScanList.size(); i++) {
String ssid = wifiScanList.get(i).SSID; //Get the SSID
String bssid = wifiScanList.get(i).BSSID //Get the BSSID
//use add here:
wifis.add( ssid + " " + bssid + " " +((wifiScanList.get(i)).toString()) ); //append to the other data
}
adapter.notifyDataSetChanged(); //add this
wifiManager.startScan(); //start a new scan to update values faster
//ArrayAdapter adapter = new ArrayAdapter<String>(getApplicationContext(),
// android.R.layout.simple_list_item_1, wifis)
//list.setAdapter(adapter);
}
}
这仍然只会更新每个扫描结果。我不认为建议每秒更新ListView
,您可能需要重新考虑显示RSSI级别的方法。您可以为每个SSID单击一次,并具有一个TextView
的详细信息视图,您可以每秒更新当前SSID的RSSI。