判断现在的网络状态
用ConnectivityManager可以判断现在的网络是wifi还是GPRS~
package com.et.TestNetWork;import android.app.Activity;import android.content.Context;import android.net.ConnectivityManager;import android.net.NetworkInfo;import android.os.Bundle;import android.widget.TextView;public class TestNetWork extends Activity { /** Called when the activity is first created. */private TextView text;public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); text = (TextView) findViewById(R.id.text); ConnectivityManager connec = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE); if (connec.getNetworkInfo(1).getState() == NetworkInfo.State.CONNECTED) text.setText("wifi方式连接"); if (connec.getNetworkInfo(0).getState() == NetworkInfo.State.CONNECTED) text.setText("GPRS方式连接"); }}