Android獲取移動網絡信號強度的方法

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判斷有沒有 SIM 卡

獲取移動網絡的信號，一定要判斷是否插瞭 SIM 卡，沒插卡肯定是沒法獲取的

    /**
     * 判斷是否包含SIM卡
     *
     * @return 狀態
     */
    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; // 沒有SIM卡
                break;
        }
        return result;
    }

獲取信號強度

如果插瞭 SIM 卡，就可以通過下邊方法來獲取移動網絡的信號強度（單位 dBM），使用的是 TelephonyManager 來監聽

    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() {

                @Override
                public 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);
        }
    }

也可以添加網絡類型的判斷，來獲取是何種網絡的信號強度

int netWorkType = getNetWorkType(mContext);
switch (netWorkType) {
    case NETWORKTYPE_WIFI:
        mTextView.setText("當前網絡為wifi,信號強度為：" + gsmSignalStrength);
        break;
    case NETWORKTYPE_2G:
        mTextView.setText("當前網絡為2G移動網絡,信號強度為：" + gsmSignalStrength);
        break;
    case NETWORKTYPE_4G:
        mTextView.setText("當前網絡為4G移動網絡,信號強度為：" + gsmSignalStrength);
        break;
    case NETWORKTYPE_NONE:
        mTextView.setText("當前沒有網絡,信號強度為：" + gsmSignalStrength);
        break;
    case -1:
        mTextView.setText("當前網絡錯誤,信號強度為：" + gsmSignalStrength);
        break;
}

用到的獲取網絡類型的方法：

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;//沒有網絡
    }
    return mNetWorkType;
}

/**
 * 判斷網絡類型
 */
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;
}

最後添加必要權限即可

<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"/>

以上就是Android獲取移動網絡信號強度的方法的詳細內容，更多關於Android獲取網絡信號強度的資料請關註WalkonNet其它相關文章！

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