Demo展示:
package com.example.dell.myapplication;
import android.app.Activity;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import com.android.volley.AuthFailureError;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.ImageLoader;
import com.android.volley.toolbox.ImageRequest;
import com.android.volley.toolbox.JsonObjectRequest;
import com.android.volley.toolbox.NetworkImageView;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;
import org.json.JSONObject;
import java.util.HashMap;
import java.util.Map;
// volley
public class VolleyActivity extends Activity {
private TextView tv_title;
private Button bt_volley_get;
private Button bt_volley_post;
private Button bt_volley_getjson;
private Button bt_volley_imagerequest;
private Button bt_volley_imageloader;
private Button bt_volley_networkimageview;
private ImageView iv_volley_result;
private NetworkImageView iv_volley_networkimagview;
private TextView tv_volley_result;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_volley);
initView();
initListener();
}
private void initListener() {
// get请求
bt_volley_get.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// 1 创建一个请求队列
RequestQueue requestQueue = Volley.newRequestQueue(VolleyActivity.this);
// 2 创建一个请求
String url = "http://api.m.mtime.cn/PageSubArea/TrailerList.api";
StringRequest stringRequest = new StringRequest(url, new Response.Listener<String>() {
// 正确接收数据回调
@Override
public void onResponse(String s) {
tv_volley_result.setText(s);
}
}, new Response.ErrorListener() {// 发生异常后的监听回调
@Override
public void onErrorResponse(VolleyError volleyError) {
tv_volley_result.setText("加载失败" + volleyError);
}
});
// 3 将创建的请求添加到请求队列中
requestQueue.add(stringRequest);
}
});
// post请求
bt_volley_post.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// 1 创建一个请求队列
RequestQueue requestQueue = Volley.newRequestQueue(VolleyActivity.this);
// 2 创建一个post请求
String url = "http://api.m.mtime.cn/PageSubArea/TrailerList.api";
StringRequest stringRequest = new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {
@Override
public void onResponse(String s) {
tv_volley_result.setText(s);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError volleyError) {
tv_volley_result.setText("请求失败" + volleyError);
}
}) {
// 添加请求参数的方法
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> map = new HashMap<String, String>();
// map.put("value1","param1");
return map;
}
};
// 3 将post请求添加到队列中
requestQueue.add(stringRequest);
}
});
// 获取json数据
bt_volley_getjson.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// 1 创建一个请求队列
RequestQueue requestQueue = Volley.newRequestQueue(VolleyActivity.this);
// 2 创建一个请求
String url = "http://api.m.mtime.cn/PageSubArea/TrailerList.api";
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(url, null, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject jsonObject) {
tv_volley_result.setText(jsonObject.toString());
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError volleyError) {
tv_volley_result.setText("请求失败" + volleyError);
}
});
// 3 将创建的请求添加到请求队列中
requestQueue.add(jsonObjectRequest);
}
});
// imagerequest加载图片
bt_volley_imagerequest.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// 1 创建一个请求队列
RequestQueue requestQueue = Volley.newRequestQueue(VolleyActivity.this);
// 2 创建一个图片的请求
String url = "http://img5.mtime.cn/mg/2016/10/11/160347.30270341.jpg";
ImageRequest imageRequest = new ImageRequest(url, new Response.Listener<Bitmap>() {
@Override
public void onResponse(Bitmap bitmap) {
// 正确接收到图片
iv_volley_result.setVisibility(View.VISIBLE);
iv_volley_result.setImageBitmap(bitmap);
}
}, 0, 0, Bitmap.Config.RGB_565, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError volleyError) {
iv_volley_result.setImageResource(R.drawable.atguigu_logo);
}
});
// 3 将请求添加到请求队列中
requestQueue.add(imageRequest);
}
});
// imageloader加载图片
bt_volley_imageloader.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// 创建一个请求队列
RequestQueue requestQueue = Volley.newRequestQueue(VolleyActivity.this);
ImageLoader imageLoader = new ImageLoader(requestQueue, new BitmapCache());
// 加载图片
String url = "http://img5.mtime.cn/mg/2016/10/11/160347.30270341.jpg";
iv_volley_result.setVisibility(View.VISIBLE);
// 获取图片的监听:参数1:用于显示图片的ImageView控件;参数2:加载图片的过程中显示的图片
// 参数3:加载图片失败的情况下显示的图片
ImageLoader.ImageListener imageListener = imageLoader.getImageListener(iv_volley_result, R.drawable.atguigu_logo, R.drawable.atguigu_logo);
imageLoader.get(url, imageListener);
}
});
// networkimageview加载图片,记得布局必须是com.android.volley.toolbox.NetworkImageView
bt_volley_networkimageview.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// 让控件显示
iv_volley_networkimagview.setVisibility(View.VISIBLE);
// 创建一个请求队列
RequestQueue requestQueue = Volley.newRequestQueue(VolleyActivity.this);
// 创建一个Imageloader
ImageLoader imageLoader = new ImageLoader(requestQueue, new BitmapCache());
// 默认图片和异常图片设置
iv_volley_networkimagview.setDefaultImageResId(R.drawable.atguigu_logo);
iv_volley_networkimagview.setErrorImageResId(R.drawable.atguigu_logo);
// 加载图片
String url = "http://img5.mtime.cn/mg/2016/10/11/160347.30270341.jpg";
iv_volley_networkimagview.setImageUrl(url, imageLoader);
}
});
}
private void initView() {
bt_volley_get = (Button) findViewById(R.id.bt_volley_get);
bt_volley_post = (Button) findViewById(R.id.bt_volley_post);
bt_volley_getjson = (Button) findViewById(R.id.bt_volley_getjson);
bt_volley_imagerequest = (Button) findViewById(R.id.bt_volley_imagerequest);
bt_volley_imageloader = (Button) findViewById(R.id.bt_volley_imageloader);
bt_volley_networkimageview = (Button) findViewById(R.id.bt_volley_networkimageview);
iv_volley_result = (ImageView) findViewById(R.id.iv_volley_result);
iv_volley_networkimagview = (NetworkImageView) findViewById(R.id.iv_volley_networkimagview);
tv_volley_result = (TextView) findViewById(R.id.tv_volley_result);
}
}
BitmapCache 类(缓存类):
package com.example.dell.myapplication;
import android.graphics.Bitmap;
import android.util.LruCache;
import com.android.volley.toolbox.ImageLoader;
public class BitmapCache implements ImageLoader.ImageCache {
private LruCache<String, Bitmap> mCache;
public BitmapCache() {
int maxSize = 10 * 1024 * 1024;// 10m
mCache = new LruCache<String, Bitmap>(maxSize) {
@Override
protected int sizeOf(String key, Bitmap bitmap) {
return bitmap.getRowBytes() * bitmap.getHeight();
}
};
}
@Override
public Bitmap getBitmap(String url) {
return mCache.get(url);
}
@Override
public void putBitmap(String url, Bitmap bitmap) {
mCache.put(url, bitmap);
}
}
布局:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<Button
android:id="@+id/bt_volley_get"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="get请求" />
<Button
android:id="@+id/bt_volley_post"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="post请求" />
<Button
android:id="@+id/bt_volley_getjson"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="请求JSON数据" />
<Button
android:id="@+id/bt_volley_imagerequest"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="ImageRequest加载图片" />
<Button
android:id="@+id/bt_volley_imageloader"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="ImageLoader加载图片" />
<Button
android:id="@+id/bt_volley_networkimageview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="NetWorkImageView加载图片" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="显示结果"
android:textSize="20sp" />
<ImageView
android:id="@+id/iv_volley_result"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone" />
<com.android.volley.toolbox.NetworkImageView
android:id="@+id/iv_volley_networkimagview"
android:layout_width="200dp"
android:layout_height="200dp"
android:visibility="gone">
</com.android.volley.toolbox.NetworkImageView>
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/tv_volley_result"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</ScrollView>
</LinearLayout>