Android gets the wifi list and androdwifi list

Android gets the wifi list and androdwifi list

AndroidManifest. xml

<? Xml version = "1.0" encoding = "UTF-8"?> <Manifest xmlns: android = "http://schemas.android.com/apk/res/android" package = "com. example. yanlei. wifi"> <uses-permission android: name = "android. permission. WRITE_EXTERNAL_STORAGE"/> <! -- Create and delete file permissions in SDCard --> <uses-permission android: name = "android. permission. MOUNT_UNMOUNT_FILESYSTEMS"/> <! -- Connect to <a href = "http://www.it165.net/news/nhlw/" target = "_ blank" class = "keylink"> Internet </a> Internet permissions --> <uses-permission android: name = "android. permission. INTERNET "/> <! -- GPS Positioning permission --> <uses-permission android: name = "android. permission. ACCESS_COARSE_LOCATION "/> <uses-permission android: name =" android. permission. ACCESS_FINE_LOCATION "/> <uses-permission android: name =" android. permission. ACCESS_NETWORK_STATE "/> <uses-permission android: name =" android. permission. CHANGE_WIFI_STATE "/> <uses-permission android: name =" android. permission. ACCESS_WIFI_STATE "/> <uses-permission android: name =" android. permission. CHANGE_WIFI_MULTICAST_STATE "/> <uses-permission android: name =" android. permission. INTERNET "/> <application android: allowBackup =" true "android: icon =" @ mipmap/ic_launcher "android: label =" @ string/app_name "android: theme = "@ style/AppTheme"> <activity android: name = ". mainActivity "android: label =" @ string/app_name "> <intent-filter> <action android: name =" android. intent. action. MAIN "/> <category android: name =" android. intent. category. LAUNCHER "/> </intent-filter> </activity> </application> </manifest>

Activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".WifiListActivity" >    <ListView        android:id="@+id/listView"        android:layout_width="match_parent"        android:layout_height="wrap_content" >    </ListView></RelativeLayout>  

Item_wifi_list.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent" >    <ImageView        android:id="@+id/imageView"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentLeft="true"        android:layout_alignParentTop="true"        android:src="@drawable/ic_launcher" />    <TextView        android:id="@+id/textView"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignBottom="@+id/imageView"        android:layout_marginBottom="14dp"        android:layout_toRightOf="@+id/imageView"        android:text="TextView" />    <TextView        android:id="@+id/signal_strenth"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignBaseline="@+id/textView"        android:layout_alignBottom="@+id/textView"        android:layout_alignParentRight="true"        android:text="TextView" /></RelativeLayout>

MainActivity. java

Package com. example. yanlei. wifi; import android. content. context; import android.net. wifi. scanResult; import android.net. wifi. wifiManager; import android. support. v7.app. appCompatActivity; import android. OS. bundle; import android. view. layoutInflater; import android. view. menu; import android. view. menuItem; import android. view. view; import android. view. viewGroup; import android. widget. baseAdapter; import android. w Idget. imageView; import android. widget. listView; import android. widget. textView; import android. widget. toast; import java. util. list; public class MainActivity extends AppCompatActivity {private WifiManager wifiManager; List <ScanResult> list; @ Override protected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); init ();} private void Init () {wifiManager = (WifiManager) getSystemService (Context. WIFI_SERVICE); openWifi (); list = wifiManager. getScanResults (); ListView listView = (ListView) findViewById (R. id. listView); if (list = null) {Toast. makeText (this, "wifi is not enabled! ", Toast. LENGTH_LONG ). show ();} else {listView. setAdapter (new MyAdapter (this, list);}/*** enable WIFI */private void openWifi () {if (! WifiManager. isWifiEnabled () {wifiManager. setWifiEnabled (true) ;}} public class MyAdapter extends BaseAdapter {LayoutInflater inflater; List <ScanResult> list; public MyAdapter (Context context, List <ScanResult> list) {// TODO Auto-generated constructor stub this. inflater = LayoutInflater. from (context); this. list = list ;}@ Override public int getCount () {// TODO Auto-generated method stub return list. size () ;}@ Override public Object getItem (int position) {// TODO Auto-generated method stub return position ;}@ Override public long getItemId (int position) {// TODO Auto-generated method stub return position;} @ Override public View getView (int position, View convertView, ViewGroup parent) {// TODO Auto-generated method stub View = null; view = inflater. inflate (R. layout. item_wifi_list, null); ScanResult scanResult = list. get (position); TextView textView = (TextView) view. findViewById (R. id. textView); textView. setText (scanResult. SSID); TextView signalStrenth = (TextView) view. findViewById (R. id. signal_strenth); signalStrenth. setText (String. valueOf (Math. abs (scanResult. level); ImageView imageView = (ImageView) view. findViewById (R. id. imageView); // determines the signal strength and displays the corresponding indicator icon if (Math. abs (scanResult. -level)> 100) {imageView. setImageDrawable (getResources (). getDrawable (R. drawable. a0);} else if (Math. abs (scanResult. level)> 80) {imageView. setImageDrawable (getResources (). getDrawable (R. drawable. a1);} else if (Math. abs (scanResult. level)> 70) {imageView. setImageDrawable (getResources (). getDrawable (R. drawable. a0);} else if (Math. abs (scanResult. level)> 60) {imageView. setImageDrawable (getResources (). getDrawable (R. drawable. a1);} else if (Math. abs (scanResult. level)> 50) {imageView. setImageDrawable (getResources (). getDrawable (R. drawable. a0);} else {imageView. setImageDrawable (getResources (). getDrawable (R. drawable. a1);} return view; }}@ 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 );}}

From: Display wifi list for android wifi