XUtiles中BitmapUtils的使用方法
首先导入依赖
compile 'org.xutils:xutils:3.5.0'
然后在libs中加一个jar包
先上布局文件
xml version="1.0" encoding="utf-8"?>
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="sqs.jcc.com.cuifan20170620.MainActivity">
android:id="@+id/photo_wall"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:columnWidth="100dp"
android:gravity="center"
android:horizontalSpacing="1dp"
android:numColumns="auto_fit"
android:stretchMode="columnWidth"
android:verticalSpacing="1dp" >
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
android:id="@+id/photo"
android:layout_width="150dp"
android:layout_height="150dp"
android:layout_centerInParent="true"
android:scaleType="fitXY"
/>
public class App extends Application { @Override public void onCreate() { super.onCreate(); x.Ext.init(this); } }适配器
public class GridViewAdapter extends BaseAdapter { public LayoutInflater inflater; public String[] imageUrls; public BitmapUtils bitmapUtils; public GridViewAdapter(Context context, String[] imageUrls, BitmapUtils bitmapUtils) { inflater = LayoutInflater.from(context); this.imageUrls = imageUrls; this.bitmapUtils = bitmapUtils; } @Override public int getCount() { return imageUrls.length; } @Override public String getItem(int position) { return imageUrls[position]; } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { String currStr = getItem(position); View view; ViewHolder holder; if(convertView == null) { view = inflater.inflate(R.layout.gridview, null); holder = new ViewHolder(); holder.imageView = (ImageView) view.findViewById(R.id.photo); view.setTag(holder); }else { view = convertView; holder = (ViewHolder) view.getTag(); } //为防止图片出现乱序，对每个ImageView进行绑定设置 holder.imageView.setTag(currStr); //设置默认的显示图片 holder.imageView.setImageResource(R.drawable.empty_photo); showBitmapToImageView(currStr, holder.imageView); return view; } /** * 设置Bitmap图片到ImageView上面 * @param url * @param imageView */ public void showBitmapToImageView(String url,ImageView imageView) { bitmapUtils.display(imageView,url); } static class ViewHolder { ImageView imageView; } }放图片的Url
public class Utils { public final static String[] imageUrls = new String[] { "https://img-my.csdn.net/uploads/201407/26/1406383299_1976.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383291_6518.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383291_8239.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383290_9329.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383290_1042.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383275_3977.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383265_8550.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383264_3954.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383264_4787.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383264_8243.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383248_3693.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383243_5120.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383242_3127.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383242_9576.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383242_1721.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383219_5806.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383214_7794.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383213_4418.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383213_3557.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383210_8779.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383172_4577.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383166_3407.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383166_2224.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383166_7301.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383165_7197.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383150_8410.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383131_3736.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383130_5094.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383130_7393.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383129_8813.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383100_3554.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383093_7894.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383092_2432.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383092_3071.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383091_3119.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383059_6589.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383059_8814.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383059_2237.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383058_4330.jpg", "https://img-my.csdn.net/uploads/201407/26/1406383038_3602.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382942_3079.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382942_8125.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382942_4881.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382941_4559.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382941_3845.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382924_8955.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382923_2141.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382923_8437.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382922_6166.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382922_4843.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382905_5804.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382904_3362.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382904_2312.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382904_4960.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382900_2418.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382881_4490.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382881_5935.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382880_3865.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382880_4662.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382879_2553.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382862_5375.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382862_1748.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382861_7618.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382861_8606.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382861_8949.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382841_9821.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382840_6603.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382840_2405.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382840_6354.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382839_5779.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382810_7578.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382810_2436.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382809_3883.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382809_6269.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382808_4179.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382790_8326.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382789_7174.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382789_5170.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382789_4118.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382788_9532.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382767_3184.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382767_4772.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382766_4924.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382766_5762.jpg", "https://img-my.csdn.net/uploads/201407/26/1406382765_7341.jpg" }; /** * ��ȡ���̻���Ĵ洢·�� * @param context * @param uniqueName * @return */ public static String getDiskCacheDir(Context context,String uniqueName) { String filePath = ""; if(Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState()) || !Environment.isExternalStorageRemovable()) { filePath = context.getExternalCacheDir().getPath(); }else { filePath = context.getCacheDir().getPath(); } return filePath+File.separator+uniqueName; } }MainActivit中
public class MainActivity extends AppCompatActivity { private GridView gv; private GridView photo_wall; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); photo_wall = (GridView) findViewById(R.id.photo_wall); String filePath = Utils.getDiskCacheDir(this, "bitmap"); File directory = new File(filePath); if(!directory.exists()) { directory.mkdirs(); } BitmapUtils bitmapUtils = new BitmapUtils(this, filePath); GridViewAdapter adapter = new GridViewAdapter(this, Utils.imageUrls, bitmapUtils); photo_wall.setAdapter(adapter); } }最后记得加上权限
GitHub 下载地址 https://github.com/DemoCuiFan/cuifan20170620android:name="android.permission.INTERNET"> android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>