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，谢谢大家对脚本之家的支持。
