I must use startCustomizedScan(ScanSettings requested) function. Request a
scan for access points in specified channel list. Each channel is specified
by its frequency in MHz, e.g. "2437"
My Full code is hear.
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button scanButton = (Button)findViewById(R.id.button1);
scanButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
WifiManager wifiManager =
(WifiManager)getSystemService(Context.WIFI_SERVICE);
ScanSettings scanSettings = new ScanSettings();
addWifiChannel(scanSettings, 11);
wifiManager.startCustomizedScan(scanSettings);
}
});
}
public WifiChannel createWifiChannel(int channel) {
WifiChannel wifiChannel = new WifiChannel();
wifiChannel.channelNum = channel;
//wifiChannel.freqMHz = getFrequencyFromChannel(channel);
return wifiChannel;
}
public void addWifiChannel(ScanSettings scanSettings, int channel) {
if (scanSettings.channelSet == null) scanSettings.channelSet = new
ArrayList<WifiChannel>();
scanSettings.channelSet.add(createWifiChannel(channel));
}
private final static ArrayList<Integer> channelsFrequency = new
ArrayList<Integer>(
Arrays.asList(0, 2412, 2417, 2422, 2427, 2432, 2437, 2442, 2447,
2452, 2457, 2462, 2467, 2472, 2484));
public static Integer getFrequencyFromChannel(int channel) {
return channelsFrequency.get(channel);
}
public static int getChannelFromFrequency(int frequency) {
return channelsFrequency.indexOf(Integer.valueOf(frequency));
}
}
My Manifaste file is here:
<manifest xmlns:android="http://schemas.android.com/apk/res/android";
package="com.custom.wifiscan"
android:sharedUserId="com.example.android"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="21"
android:targetSdkVersion="21" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission
android:name="android.permission.CHANGE_WIFI_MULTICAST_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.LOCATION_HARDWARE" />
But my aplication run real devices (LG G3 run in 5.0 ) application is stoped
09-12 19:08:00.391: E/AndroidRuntime(23766): FATAL EXCEPTION: main09-12
19:08:00.391: E/AndroidRuntime(23766): Process: com.custom.wifiscan, PID:
2376609-12 19:08:00.391: E/AndroidRuntime(23766): java.lang.SecurityException:
LocationHardware: Neither user 10246 nor current process has
android.permission.LOCATION_HARDWARE.09-12 19:08:00.391:
E/AndroidRuntime(23766): at
android.os.Parcel.readException(Parcel.java:1540)09-12 19:08:00.391:
E/AndroidRuntime(23766): at
android.os.Parcel.readException(Parcel.java:1493)09-12 19:08:00.391:
E/AndroidRuntime(23766): at
android.net.wifi.IWifiManager$Stub$Proxy.startScan(IWifiManager.java:984)09-12
19:08:00.391: E/AndroidRuntime(23766): at
android.net.wifi.WifiManager.startCustomizedScan(WifiManager.java:1037)09-12
19:08:00.391: E/AndroidRuntime(23766): at
com.custom.wifiscan.MainActivity$1.onClick(MainActivity.java:30)09-12
19:08:00.391: E/AndroidRuntime(23766): at
android.view.View.performClick(View.java:4763)09-12 19:08:00.391:
E/AndroidRuntime(23766): at
android.view.View$PerformClick.run(View.java:19821)09-12 19:08:00.391:
E/AndroidRuntime(23766): at
android.os.Handler.handleCallback(Handler.java:739)09-12 19:08:00.391:
E/AndroidRuntime(23766): at
android.os.Handler.dispatchMessage(Handler.java:95)09-12 19:08:00.391:
E/AndroidRuntime(23766): at android.os.Looper.loop(Looper.java:135)09-12
19:08:00.391: E/AndroidRuntime(23766): at
android.app.ActivityThread.main(ActivityThread.java:5274)09-12 19:08:00.391:
E/AndroidRuntime(23766): at java.lang.reflect.Method.invoke(Native
Method)09-12 19:08:00.391: E/AndroidRuntime(23766): at
java.lang.reflect.Method.invoke(Method.java:372)09-12 19:08:00.391:
E/AndroidRuntime(23766): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:909)09-12
19:08:00.391: E/AndroidRuntime(23766): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:704)
android.permission.LOCATION_HARDWARE What does the error. How can I solve
this error Please someone give me some insight, Best respects, Thank.
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