前言

最近因为工作的需要，要自定义展示Wifi信号强弱的需要，就通过利用系统广播的方式实现了一个自定义View——WifiStateView，下面话不多说了，感兴趣的朋友们一起来看看详细的介绍吧。

实现的效果图如下所示：

用不同的图片来表示Wifi信号的强弱，可以自定义Wifi信号等级

图标简陋了点，根据需要来替换即可

/** * 作者： 叶应是叶 * 时间： 2017/8/22 18:25 * 描述： */public class WifiStateView extends AppCompatImageView { private WifiManager wifiManager; private WifiHandler wifiHandler; //没有开启Wifi或开启了Wifi但没有连接 private static final int LEVEL_NONE = 0; //Wifi信号等级（最弱） private static final int LEVEL_1 = 1; //Wifi信号等级 private static final int LEVEL_2 = 2; //Wifi信号等级 private static final int LEVEL_3 = 3; //Wifi信号等级（最强） private static final int LEVEL_4 = 4; private final String TAG = "WifiStateView"; private static class WifiHandler extends Handler { //虚引用 private WeakReference<WifiStateView> stateViewWeakReference; WifiHandler(WifiStateView wifiStateView) { stateViewWeakReference = new WeakReference<>(wifiStateView); } @Override public void handleMessage(Message msg) { WifiStateView wifiStateView = stateViewWeakReference.get(); if (wifiStateView == null) { return; } switch (msg.what) { case LEVEL_1: wifiStateView.setImageResource(R.drawable.wifi_1); break; case LEVEL_2: wifiStateView.setImageResource(R.drawable.wifi_2); break; case LEVEL_3: wifiStateView.setImageResource(R.drawable.wifi_3); break; case LEVEL_4: wifiStateView.setImageResource(R.drawable.wifi_4); break; case LEVEL_NONE: default: wifiStateView.setImageResource(R.drawable.wifi_none); break; } } } private BroadcastReceiver wifiStateReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { Log.e(TAG, "action " + intent.getAction()); switch (intent.getAction()) { case WifiManager.WIFI_STATE_CHANGED_ACTION: if (wifiManager.getWifiState() == WifiManager.WIFI_STATE_DISABLING) { wifiHandler.sendEmptyMessage(LEVEL_NONE); } break; case WifiManager.RSSI_CHANGED_ACTION: if (wifiManager.getWifiState() == WifiManager.WIFI_STATE_DISABLED) { wifiHandler.sendEmptyMessage(LEVEL_NONE); return; } WifiInfo wifiInfo = wifiManager.getConnectionInfo(); int level = WifiManager.calculateSignalLevel(wifiInfo.getRssi(), 5); Log.e(TAG, "level:" + level); wifiHandler.sendEmptyMessage(level); break; } } }; public WifiStateView(Context context) { this(context, null); } public WifiStateView(Context context, @Nullable AttributeSet attrs) { this(context, attrs, 0); } public WifiStateView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); wifiManager = (WifiManager) context.getApplicationContext().getSystemService(Context.WIFI_SERVICE); wifiHandler = new WifiHandler(this); } @Override protected void onAttachedToWindow() { super.onAttachedToWindow(); IntentFilter intentFilter = new IntentFilter(); //Wifi连接状态变化 intentFilter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION); //Wifi信号强度变化 intentFilter.addAction(WifiManager.RSSI_CHANGED_ACTION); getContext().registerReceiver(wifiStateReceiver, intentFilter); } @Override protected void onDetachedFromWindow() { super.onDetachedFromWindow(); wifiHandler.removeCallbacksAndMessages(null); getContext().unregisterReceiver(wifiStateReceiver); }}

这里提供代码下载：

github地址：https://github.com/leavesC/WifiStateView

本地下载：http://xiazai.jb51.net/201708/yuanma/WifiStateView(jb51.net).rar

总结

以上就是这篇文章的全部内容了，希望本文的内容对各位Android开发者们的学习或者工作能带来一定的帮助，如果有疑问大家可以留言交流，谢谢大家对的支持。