判断有没有 SIM 卡

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() {

@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

以上就是Android获取移动网络信号强度的方法的详细内容，更多关于Android获取网络信号强度的资料请关注脚本之家其它相关文章！