android httpclient处理网络异常

下面是我自己设置网络连接超时设置的提示；网络异常可以自己catch里分不同异常，然后用Handler处理msg

 /**
 * 网连接超时提示
 */
 private void netTimeOut(){
 AlertDialog.Builder builder3=new AlertDialog.Builder(MainActivity.this);
 builder3.setTitle(R.string.dia_title);
 builder3.setMessage(log_no);
 builder3.setNegativeButton(R.string.dia_retry, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface arg0, int arg1) {
                arg0.dismiss();
                MainActivity.this.finish();
            }
        });
         builder3.setPositiveButton(R.string.dia_exit, new DialogInterface.OnClickListener() {

                @Override
                public void onClick(DialogInterface arg0, int arg1) {
                    arg0.dismiss();
                    ActivityManag.avtivityClose();
                }
            });
         builder3.create().show();
}