content: package com.grumoon.volleydemo.fragment;
  
  import android.os.Bundle;
  import android.support.v4.app.Fragment;
  import android.view.LayoutInflater;
  import android.view.View;
  import android.view.View.OnClickListener;
  import android.view.ViewGroup;
  import android.widget.Button;
  import android.widget.EditText;
  import android.widget.TextView;
  
  import com.android.volley.Response.ErrorListener;
  import com.android.volley.Response.Listener;
  import com.android.volley.VolleyError;
  import com.android.volley.toolbox.StringRequest;
  import com.grumoon.volleydemo.R;
  import com.grumoon.volleydemo.util.Constants;
  import com.grumoon.volleydemo.util.StringUtil;
  import com.grumoon.volleydemo.util.ToastUtil;
  import com.grumoon.volleydemo.util.VolleyUtil;
  
  public class StringRequestFragment extends Fragment {
  	public static final int INDEX = 11;
  
  	private EditText etUrl;
  	private Button btnSend;
  	private TextView tvResult;
  
  	@Override
  	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
  
  		View view = inflater.inflate(R.layout.fr_string_request, container,false);
  
  		initView(view);
  
  		return view;
  	}
  
  	private void initView(View view) {
  		etUrl = (EditText) view.findViewById(R.id.et_url);
  		btnSend = (Button) view.findViewById(R.id.btn_send);
  		tvResult = (TextView) view.findViewById(R.id.tv_result);
  
  		etUrl.setText(Constants.DEFAULT_STRING_REQUEST_URL);
  
  		btnSend.setOnClickListener(new OnClickListener() {
  
  			@Override
  			public void onClick(View v) {
  				if (StringUtil.isEmpty(etUrl.getText().toString())) {
  					ToastUtil.showToast(getActivity(), "请输入请求地址");
  					return;
  				}
  				//请求之前，先取消之前的请求（取消还没有进行完的请求）
  				VolleyUtil.getQueue(getActivity()).cancelAll(this);
  				tvResult.setText("");
  
  				StringRequest request = new StringRequest(StringUtil.preUrl(etUrl.getText().toString().trim()),
  						new Listener<String>() {
  
  							@Override
  							public void onResponse(String response) {
  								tvResult.setText(response);
  
  							}
  						}, new ErrorListener() {
  
  							@Override
  							public void onErrorResponse(VolleyError arg0) {
  								ToastUtil.showToast(getActivity(), getResources().getString(R.string.request_fail_text));
  
  							}
  						});
  				//请求加上Tag,用于取消请求
  				request.setTag(this);
  				
  				
  				VolleyUtil.getQueue(getActivity()).add(request);
  
  			}
  		});
  	}
  
  	@Override
  	public void onDestroyView() {
  		VolleyUtil.getQueue(getActivity()).cancelAll(this);
  		super.onDestroyView();
  	}
  	
  	
  	
  
  }
  