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 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：

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。