androd 獲得wifi列表，androdwifi列表

androd 獲得wifi列表，androdwifi列表

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" />    <!-- 在SDCard中建立與刪除檔案許可權 -->    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>    <!-- 串連<a href="http://www.it165.net/news/nhlw/" target="_blank" class="keylink">互連網</a>Internet許可權 -->    <uses-permission android:name="android.permission.INTERNET" />    <!-- GPS定位許可權 -->    <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.widget.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未開啟！", Toast.LENGTH_LONG).show();        }else {            listView.setAdapter(new MyAdapter(this,list));        }    }    /**     *  開啟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 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);            //判斷訊號強度，顯示對應的指示表徵圖            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);    }}

來自：android wifi講解 wifi列表顯示