Android wifi 信号强度的显示以及周边信号的代码

发布时间：2013-8-30 15:54 发布者：reggae

关键词：信号强度 , Android , wifi

先把activity_main.xml文件代码贴出来.TextView充满屏幕

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xmlns:tools="http://schemas.android.com/tools"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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android:paddingBottom="@dimen/activity_vertical_margin"
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android:paddingLeft="@dimen/activity_horizontal_margin"
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android:paddingRight="@dimen/activity_horizontal_margin"
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android:paddingTop="@dimen/activity_vertical_margin"
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tools:context=".MainActivity" >
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android:id="@+id/textView1"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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android:gravity="center"
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android:textColor="@android:color/black"
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android:textSize="25sp" />
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复制代码

AndroidMenifest.xml中，加入两行，作用：获取权限

最后是MainActivity.java中的程序：
查看源码打印?

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package com.example.wifistrength;
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import java.util.List;
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import android.net.wifi.ScanResult;
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import android.net.wifi.WifiInfo;
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import android.net.wifi.WifiManager;
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import android.os.Bundle;
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import android.app.Activity;
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import android.content.Context;
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import android.view.Menu;
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import android.widget.TextView;
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import android.widget.Toast;
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public class MainActivity extends Activity {
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TextView tv;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_main);
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String wserviceName = Context.WIFI_SERVICE;
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WifiManager wm = (WifiManager) getSystemService(wserviceName);
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WifiInfo info = wm.getConnectionInfo();
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int strength = info.getRssi();
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int speed = info.getLinkSpeed();
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String units = WifiInfo.LINK_SPEED_UNITS;
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String ssid = info.getSSID();
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tv = (TextView) findViewById(R.id.textView1);
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List results = wm.getScanResults();
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String otherwifi = "The existing network is: \n\n";
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for (ScanResult result : results) {
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otherwifi += result.SSID + ":" + result.level + "\n";
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}
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String text = "We are connecting to " + ssid + " at " + String.valueOf(speed) + " " + String.valueOf(units) + ". Strength : " + strength;
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otherwifi += "\n\n";
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otherwifi += text;
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tv.setText(otherwifi);
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}
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@Override
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public boolean onCreateOptionsMenu(Menu menu) {
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// Inflate the menu; this adds items to the action bar if it is present.
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getMenuInflater().inflate(R.menu.main, menu);
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return true;
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}
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}