Android获取移动网络信号强度的方法

获取移动网络的信号，一定要判断是否插了 SIM 卡，没插卡肯定是没法获取的

/** * 判断是否包含SIM卡 * * @return 状态 */ public static boolean hasSimCard(Context context) {TelephonyManager telMgr = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);int simState = telMgr.getSimState();boolean result = true;switch (simState) { case TelephonyManager.SIM_STATE_ABSENT: case TelephonyManager.SIM_STATE_UNKNOWN:result = false; // 没有SIM卡break;}return result; }获取信号强度

如果插了 SIM 卡，就可以通过下边方法来获取移动网络的信号强度（单位 dBM），使用的是 TelephonyManager 来监听

private void getMobileNetworkSignal() {if (!PhoneUtils.hasSimCard(mcontext)) { logger.info('getMobileNetworkSignal: no sim card'); return;}TelephonyManager mTelephonyManager = (TelephonyManager) BaseApplication.getAppContext().getSystemService(Context.TELEPHONY_SERVICE);if (mTelephonyManager != null) { mTelephonyManager.listen(new PhoneStateListener() {@Overridepublic void onSignalStrengthsChanged(SignalStrength signalStrength) { super.onSignalStrengthsChanged(signalStrength); int asu = signalStrength.getGsmSignalStrength(); int lastSignal = -113 + 2 * asu; if (lastSignal > 0) {mobileNetworkSignal = lastSignal + 'dBm'; } logger.info('Current mobileNetworkSignal：' + lastSignal + ' dBm');} }, PhoneStateListener.LISTEN_SIGNAL_STRENGTHS);} }

也可以添加网络类型的判断，来获取是何种网络的信号强度

int netWorkType = getNetWorkType(mContext);switch (netWorkType) { case NETWORKTYPE_WIFI:mTextView.setText('当前网络为wifi,信号强度为：' + gsmSignalStrength);break; case NETWORKTYPE_2G:mTextView.setText('当前网络为2G移动网络,信号强度为：' + gsmSignalStrength);break; case NETWORKTYPE_4G:mTextView.setText('当前网络为4G移动网络,信号强度为：' + gsmSignalStrength);break; case NETWORKTYPE_NONE:mTextView.setText('当前没有网络,信号强度为：' + gsmSignalStrength);break; case -1:mTextView.setText('当前网络错误,信号强度为：' + gsmSignalStrength);break;}

用到的获取网络类型的方法：

public static int getNetWorkType(Context context) { int mNetWorkType = -1; ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo networkInfo = manager.getActiveNetworkInfo(); if (networkInfo != null && networkInfo.isConnected()) {String type = networkInfo.getTypeName();if (type.equalsIgnoreCase('WIFI')) { mNetWorkType = NETWORKTYPE_WIFI;} else if (type.equalsIgnoreCase('MOBILE')) { return isFastMobileNetwork(context) ? NETWORKTYPE_4G : NETWORKTYPE_2G;} } else {mNetWorkType = NETWORKTYPE_NONE;//没有网络 } return mNetWorkType;}/** * 判断网络类型 */private static boolean isFastMobileNetwork(Context context) { TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE); if (telephonyManager.getNetworkType() == TelephonyManager.NETWORK_TYPE_LTE) {return true; } return false;}

最后添加必要权限即可

<uses-permission android:name='android.permission.INTERNET'/><uses-permission android:name='android.permission.CHANGE_NETWORK_STATE'/><uses-permission android:name='android.permission.ACCESS_WIFI_STATE'/><uses-permission android:name='android.permission.ACCESS_NETWORK_STATE'/>

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