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Android显示wifi信号强度以及周边信号的代码
先把activity_main.xml文件代码贴出来.TextView充满屏幕
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | < LinearLayout 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 = ".MainActivity" > <!-- <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@android:color/white" /> --> < TextView android:id = "@+id/textView1" android:layout_width = "match_parent" android:layout_height = "match_parent" android:gravity = "center" android:textColor = "@android:color/black" android:textSize = "25sp" /> </ LinearLayout > |
AndroidMenifest.xml中,加入两行,作用:获取权限
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1 2 | < uses-permission android:name = "android.permission.ACCESS_WIFI_STATE" /> < uses-permission android:name = "android.permission.CHANGE_NETWORK_STATE" /> |
最后是MainActivity.java中的程序:
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 | package com.example.wifistrength; import java.util.List; import android.net.wifi.ScanResult; import android.net.wifi.WifiInfo; import android.net.wifi.WifiManager; import android.os.Bundle; import android.app.Activity; import android.content.Context; import android.view.Menu; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends Activity { TextView tv; @Override protected void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView(R.layout.activity_main); String wserviceName = Context.WIFI_SERVICE; WifiManager wm = (WifiManager) getSystemService(wserviceName); WifiInfo info = wm.getConnectionInfo(); int strength = info.getRssi(); int speed = info.getLinkSpeed(); String units = WifiInfo.LINK_SPEED_UNITS; String ssid = info.getSSID(); tv = (TextView) findViewById(R.id.textView1); List<ScanResult> results = wm.getScanResults(); String otherwifi = "The existing network is: \n\n" ; for (ScanResult result : results) { otherwifi += result.SSID + ":" + result.level + "\n" ; } String text = "We are connecting to " + ssid + " at " + String.valueOf(speed) + " " + String.valueOf(units) + ". Strength : " + strength; otherwifi += "\n\n" ; otherwifi += text; tv.setText(otherwifi); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true ; } } |
结果图:
Android显示wifi信号强度以及周边信号的代码
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