如何将 Android Wifi 扫描结果添加到列表中? [英] How can I get Android Wifi Scan Results into a list?
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问题描述
我知道如何获取
的 Android Wifi 扫描,但我无法找出用它们制作列表适配器的最佳方法.我只想将扫描的
中的 SSID 和 BSSID 绑定到 text1 和 text2.
I know how to get a <List>
of Android Wifi Scans but I can not figure out the best way to make a list adapter out of them. I would like to just bind SSID and BSSID from a <List>
of scans to text1 and text2.
我一直在做的事情的例子
Samples of what I have been doing
wifi.startScan();
// get list of the results in object format ( like an array )
List<ScanResult> results = wifi.getScanResults();`
// loop that goes through list
for (ScanResult result : results) {
Toast.makeText(this, result.SSID + " " + result.level,
Toast.LENGTH_SHORT).show();
还有:
private void fillDataFromDb() {
Cursor scanCursor = Db.fetchAllScans();
startManagingCursor(scanCursor);`
// Create an array to specify the fields we want to display in the list
// (only TITLE)
String[] from = new String[] { WifiDbAdapter.KEY_BSSID,
WifiDbAdapter.KEY_SSID };
// and an array of the fields we want to bind those fields to (in this
// case just text1)
int[] to = new int[] { R.id.text1, R.id.text2 };
// Now create a simple cursor adapter and set it to display
SimpleCursorAdapter scansdb = new SimpleCursorAdapter(this,
R.layout.scan_row, scanCursor, from, to);
setListAdapter(scansdb);
}
推荐答案
试试这个代码
public class WiFiDemo extends Activity implements OnClickListener
{
WifiManager wifi;
ListView lv;
TextView textStatus;
Button buttonScan;
int size = 0;
List<ScanResult> results;
String ITEM_KEY = "key";
ArrayList<HashMap<String, String>> arraylist = new ArrayList<HashMap<String, String>>();
SimpleAdapter adapter;
/* Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
textStatus = (TextView) findViewById(R.id.textStatus);
buttonScan = (Button) findViewById(R.id.buttonScan);
buttonScan.setOnClickListener(this);
lv = (ListView)findViewById(R.id.list);
wifi = (WifiManager) getApplicationContext().getSystemService(Context.WIFI_SERVICE);
if (wifi.isWifiEnabled() == false)
{
Toast.makeText(getApplicationContext(), "wifi is disabled..making it enabled", Toast.LENGTH_LONG).show();
wifi.setWifiEnabled(true);
}
this.adapter = new SimpleAdapter(WiFiDemo.this, arraylist, R.layout.row, new String[] { ITEM_KEY }, new int[] { R.id.list_value });
lv.setAdapter(this.adapter);
registerReceiver(new BroadcastReceiver()
{
@Override
public void onReceive(Context c, Intent intent)
{
results = wifi.getScanResults();
size = results.size();
}
}, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
}
public void onClick(View view)
{
arraylist.clear();
wifi.startScan();
Toast.makeText(this, "Scanning...." + size, Toast.LENGTH_SHORT).show();
try
{
size = size - 1;
while (size >= 0)
{
HashMap<String, String> item = new HashMap<String, String>();
item.put(ITEM_KEY, results.get(size).SSID + " " + results.get(size).capabilities);
arraylist.add(item);
size--;
adapter.notifyDataSetChanged();
}
}
catch (Exception e)
{ }
}
}
WiFiDemo.xml:
<?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:layout_margin="16dp"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal">
<TextView
android:id="@+id/textStatus"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Status" />
<Button
android:id="@+id/buttonScan"
android:layout_width="wrap_content"
android:layout_height="40dp"
android:text="Scan" />
</LinearLayout>
<ListView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="20dp"></ListView>
</LinearLayout>
对于 ListView-row.xml
For ListView- row.xml
<?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="wrap_content"
android:orientation="vertical"
android:padding="8dp">
<TextView
android:id="@+id/list_value"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="14dp" />
</LinearLayout>
在AndroidManifest.xml
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
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