获取连接的网络的WiFi信号强度 [英] Get WiFi Signal Strength of Connected Network
问题描述
我想显示在我的Android应用程序在连接WiFi网络的信号强度。我已经尝试了以下内容:
I'm trying to display the signal strength of the connected WiFi network in my Android app. I've tried the following:
//Receiver for information on the network info
private BroadcastReceiver mNetworkReceiver = new BroadcastReceiver()
{
@Override
public void onReceive(Context context, Intent intent)
{
Log.d("INFO", "onReceive()");
List<ScanResult> scanResult = mWifi.getScanResults();
for(ScanResult scan : scanResult)
{
Log.d("INFO","Network strength: " + String.valueOf(scan.level) + " dBm " + scan.SSID);
}
}
};
然后,我做我的接收器的注册/注销的onResume()/的onPause():
And then I do the registering/unregistering of my receiver on the onResume()/onPause():
@Override
public void onResume()
{
super.onResume();
mActivity.registerReceiver(mNetworkReceiver, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION)); //network info
}
@Override
public void onPause()
{
super.onPause();
mActivity.unregisterReceiver(mNetworkReceiver);
}
不过,这似乎并没有工作。我也有 ACCESS_WIFI_STATE
权限启用。我的接收器只调用如果我叫&LT; WiFiManager&GT; .startScan()
手动,但我试图把它与我的广播接收器工作,让我总能表示信号强度只要稍有改变。我注意到的onReceive()
提供了一个列表,它是不必要的,如果我只是想连接的网络的统计。更改过什么办法?
But this doesn't seem to work. I also have the ACCESS_WIFI_STATE
permission enabled. My receiver is only called if I call <WiFiManager>.startScan()
manually, but I'm trying to get it to work with my broadcast receiver so that I can always show the signal strength whenever it changes. I noticed that the onReceive()
provides a list which is unnecessary if I just want the connected network's stats. Any way to change that too?
编辑:另外,我认识到,有这方面的一些相关问题,但那些我读过并没有太大的帮助。
EDIT2:澄清我的问题有点。主要的问题是,我的接收器不会被调用,除非我称之为 startScan()
。
edit: Also, I realize that there are some related questions on this, but the ones I've read weren't too helpful.
edit2: Clarified my question a bit. The main problem is that my receiver is never called unless I call startScan()
.
推荐答案
好这个code是工作的罚款与我通知WiFi信号强度时,它改变使用吐司,所以
well this code is working fine with me to inform WiFi signal strength when it changes using toast, so
我的接收器是这样
@Override
public void onReceive(Context context, Intent intent) {
List<ScanResult> results = wifiDemo.wifi.getScanResults();
ScanResult bestSignal = null;
for (ScanResult result : results) {
if (bestSignal == null
|| WifiManager.compareSignalLevel(bestSignal.level, result.level) < 0)
bestSignal = result;
}
String message = String.format("%s networks found. %s is the strongest.",
results.size(), bestSignal.SSID);
Toast.makeText(context, message, Toast.LENGTH_LONG).show();
Log.d("Debug", "onReceive() message: " + message);
}
这是我的启动活动以注册接收器,让无线信息上的TextView
this is what in my start-up activity to register Receiver and get Wifi Info on TextView
public class WiFiDemo extends Activity {
WifiManager wifi;
BroadcastReceiver receiver;
TextView textStatus;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Setup UI
textStatus = (TextView) findViewById(R.id.textStatus);
// Setup WiFi
wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);
// Get WiFi status
WifiInfo info = wifi.getConnectionInfo();
textStatus.append("\n\nWiFi Status: " + info.toString());
// List available networks
List<WifiConfiguration> configs = wifi.getConfiguredNetworks();
for (WifiConfiguration config : configs) {
textStatus.append("\n\n" + config.toString());
}
// Register Broadcast Receiver
if (receiver == null)
receiver = new WiFiScanReceiver(this);
registerReceiver(receiver, new IntentFilter(
WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
Log.d(TAG, "onCreate()");
}
@Override
public void onStop() {
unregisterReceiver(receiver);
super.onStop();
}
}
我把滚动视图TextView的在 XML布局文件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ScrollView
android:id="@+id/ScrollView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/textStatus"
android:text="WiFi Connections :" />
</ScrollView>
</LinearLayout>
终于我的清单是这个样子
and finally my manifest is look like this
<uses-sdk android:minSdkVersion="10" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE">
</uses-permission>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE">
</uses-permission>
<activity android:name=".WiFiDemo" android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".WiFiScanReceiver">
<intent-filter>
<action android:name="com.rdc" />
</intent-filter>
</receiver>
还有任何问题,让我知道!
still have any trouble let me know!!
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