下面显示了我创建的用于输出家庭接入点信号强度的代码(总共1个接入点)。我有一个初始化的按钮,调用initializeWiFiListener()但我的应用程序有一些问题,代码行:
Log.i(TAG,“执行initializeWiFiListener”);
有错误,我不知道为什么,还有其他原因导致此代码无法输出我的家庭接入点的强度。谢谢
package com.example.newandroidapplication;
import java.util.List;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.os.Bundle;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.util.Log;
import android.view.Menu;
public class MainActivity extends Activity{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
private void initializeWiFiListener(){
Log.i(TAG, "executing initializeWiFiListener");
String connectivity_context = Context.WIFI_SERVICE;
final WifiManager wifi = (WifiManager)getSystemService(connectivity_context);
if(!wifi.isWifiEnabled()){
if(wifi.getWifiState() != WifiManager.WIFI_STATE_ENABLING){
wifi.setWifiEnabled(true);
}
}
registerReceiver(new BroadcastReceiver(){
@Override
public void onReceive(Context context, Intent intent) {
WifiInfo info = wifi.getConnectionInfo();
//TODO: implement methods for action handling
int value = info.getRssi();
System.out.println(value);
}
}, new IntentFilter(WifiManager.RSSI_CHANGED_ACTION));
}
答案 0 :(得分:0)
代码行:
Log.i(TAG, "executing initializeWiFiListener");
有错误,我不知道为什么
您需要定义日志标记。例如:
private static final String TAG = MainActivity.class.getSimpleName();