Android 判斷機子是否聯網和聯網方式

判斷網絡是否連接

private boolean CheckNetwork() {
boolean flag = false;
ConnectivityManager cwjManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
if (cwjManager.getActiveNetworkInfo() != null)
flag = cwjManager.getActiveNetworkInfo().isAvailable();
if (!flag) {
Builder b = new AlertDialog.Builder(this).setTitle("没有可用的网络").setMessage(getResources().getString("请开启GPRS或WIFI网络连接"));
b.setPositiveButton("确定", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
Intent mIntent = new Intent("/");
ComponentName comp = new ComponentName("com.android.settings", "com.android.settings.WirelessSettings");
mIntent.setComponent(comp);
mIntent.setAction("<span class="hilite">android</span>.intent.action.VIEW");
startActivity(mIntent);
}
}).setNeutralButton("取消", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
dialog.cancel();
}
}).create();
b.show();
}

return flag;
}

判斷聯網方式

  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");