ImageLoader加载图片

最新推荐文章于 2022-08-20 21:52:25 发布

原创最新推荐文章于 2022-08-20 21:52:25 发布 · 390 阅读

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本文介绍了一个Android平台上流行的图片加载库Universal Image Loader的使用方法。通过实例展示了如何配置及初始化ImageLoader，如何在GridView中加载网络图片，并提供了一种自定义适配器的方式实现图片的异步加载。

先添加依赖：

compile'com.nostra13.universalimageloader:universal-image-loader:1.9.5'

主类：

package com.liulailin.day06_imageloader;

import android.app.Application;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;

import com.nostra13.universalimageloader.core.ImageLoader;

import static android.view.View.inflate;

public class MainActivity extends AppCompatActivity {

String[] images ={
"https://img-my.youkuaiyun.com/uploads/201407/26/1406383264_8243.jpg",
"https://img-my.youkuaiyun.com/uploads/201407/26/1406383248_3693.jpg",
"https://img-my.youkuaiyun.com/uploads/201407/26/1406383243_5120.jpg",
"https://img-my.youkuaiyun.com/uploads/201407/26/1406383242_3127.jpg",
"https://img-my.youkuaiyun.com/uploads/201407/26/1406383242_9576.jpg",
"https://img-my.youkuaiyun.com/uploads/201407/26/1406383242_1721.jpg",
"https://img-my.youkuaiyun.com/uploads/201407/26/1406383219_5806.jpg",
"https://img-my.youkuaiyun.com/uploads/201407/26/1406383214_7794.jpg",
"https://img-my.youkuaiyun.com/uploads/201407/26/1406383213_4418.jpg",
"https://img-my.youkuaiyun.com/uploads/201407/26/1406383213_3557.jpg",
"https://img-my.youkuaiyun.com/uploads/201407/26/1406383210_8779.jpg",
"https://img-my.youkuaiyun.com/uploads/201407/26/1406383172_4577.jpg",
"https://img-my.youkuaiyun.com/uploads/201407/26/1406383166_3407.jpg",
"https://img-my.youkuaiyun.com/uploads/201407/26/1406383166_2224.jpg",
"https://img-my.youkuaiyun.com/uploads/201407/26/1406383166_7301.jpg",
"https://img-my.youkuaiyun.com/uploads/201407/26/1406383165_7197.jpg"
};

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Log.e("MyApplication","我走了MainActivity");

GridView gv = (GridView) findViewById(R.id.gv);
gv.setAdapter(new MyAdapter());
}

class MyAdapter extends BaseAdapter{

@Override
public int getCount() {
return images.length;
}

@Override
public Object getItem(int position) {
return null;
}

@Override
public long getItemId(int position) {
return 0;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {

if (convertView==null) {
convertView= View.inflate(MainActivity.this, R.layout.gv_item, null);
}
// ImageView iv = new ImageView(MainActivity.this);

ImageView gv_iv = (ImageView) convertView.findViewById(R.id.gv_iv);
//给imageView设置图片

ImageLoader.getInstance().displayImage(images[position],gv_iv);

return convertView;
}
}
}

图片加载：

package com.liulailin.day06_imageloader;

import android.app.Application;
import android.util.Log;

import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;

/**
* Created by Administrator on 2017/8/8.
*/

public class MyApplication extends Application{

@Override
public void onCreate() {
super.onCreate();
Log.e("MyApplication","我走了application");
ImageLoaderConfiguration configuration = new ImageLoaderConfiguration.Builder(this).build();
ImageLoader.getInstance().init(configuration);

}
}

//图片切割

@Override
public void onBindViewHolder(MyviewHolder holder, int position) {
String [] img=list.get(position).getImages().split("\\|");
ImageLoader.getInstance().displayImage(img[0],holder.iv);
holder.title.setText(list.get(position).getTitle());
holder.price.setText(list.get(position).getPrice()+"");
holder.title1.setText(list.get(position).getSubhead());
holder.price1.setText(list.get(position).getBargainPrice()+"");

}