Android 自定义Wifi信号指示View

来源：互联网发布：淘宝联盟客服热线编辑：程序博客网时间：2024/05/21 17:44

最近有需要自定义展示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

实现的效果图如下所示：
这里写图片描述

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：WifiStateView

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