[转]Android开源框架ImageLoader的完美例子

Android开源框架ImageLoader的完美例子

2013年8月19日开源框架之Universal_Image_Loader学习

很多人都在讨论如何让图片能在异步加载更加流畅，可以显示大量图片，在拖动ListView的时候不会出现卡的现象。关于ImageLoader这个开源框架的使用有很多网友都介绍过，不过还不够清楚，这里有一个关于这个开源项目的完美例子，ListView的图片加载、GridView的图片加载、ViewPager的图片加载、Gallery画廊的图片加载、Widget的使用。很完善的一个例子，在这里我把所有界面效果做出博客分享出来，需要源码的朋友到我的资源页下载

下载地址：http://download.csdn.net/detail/wwj_748/5975847

要使用ImageLoader就要到这里下载jar包：

https://github.com/nostra13/Android-Universal-Image-Loader

然后导入项目中去就行了

项目文档结构图：

从界面说起，界面本身是没什么好说的，就是如何在xml当中进行定义罢了

有以下这么多个布局文件

一个一个来看呗

首先是这样的效果

这个在Android4.2.2比较好看，在Android2.3.3就显得比较挫。

/2013.8.19_Universal_Image_Loader_Demo/res/layout/ac_home.xml

1. <?xml version="1.0" encoding="utf-8"?>
2. <ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
3. android:layout_width="fill_parent"
4. android:layout_height="fill_parent" >
5. <LinearLayout
6. android:layout_width="fill_parent"
7. android:layout_height="fill_parent"
8. android:orientation="vertical" >
9. <TextView
10. android:layout_width="fill_parent"
11. android:layout_height="wrap_content"
12. android:gravity="center"
13. android:paddingBottom="10dip"
14. android:paddingTop="20dip"
15. android:text="@string/label_activity_examples"
16. android:textSize="24sp" />
17. <Button
18. android:layout_width="fill_parent"
19. android:layout_height="wrap_content"
20. android:layout_margin="10dip"
21. android:onClick="onImageListClick"
22. android:text="@string/button_image_list" />
23. <Button
24. android:layout_width="fill_parent"
25. android:layout_height="wrap_content"
26. android:layout_margin="10dip"
27. android:onClick="onImageGridClick"
28. android:text="@string/button_image_grid" />
29. <Button
30. android:layout_width="fill_parent"
31. android:layout_height="wrap_content"
32. android:layout_margin="10dip"
33. android:onClick="onImagePagerClick"
34. android:text="@string/button_image_pager" />
35. <Button
36. android:layout_width="fill_parent"
37. android:layout_height="wrap_content"
38. android:layout_margin="10dip"
39. android:onClick="onImageGalleryClick"
40. android:text="@string/button_image_gallery" />
41. </LinearLayout>
42. </ScrollView>

列表异步加载图片效果

/2013.8.19_Universal_Image_Loader_Demo/res/layout/ac_image_list.xml

1. <?xml version="1.0" encoding="utf-8"?>
2. <ListView xmlns:android="http://schemas.android.com/apk/res/android"
3. android:id="@android:id/list"
4. android:layout_width="fill_parent"
5. android:layout_height="fill_parent" />

/2013.8.19_Universal_Image_Loader_Demo/res/layout/item_list_image.xml

1. <?xml version="1.0" encoding="utf-8"?>
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
3. android:layout_width="fill_parent"
4. android:layout_height="wrap_content" >
5. <ImageView
6. android:id="@+id/image"
7. android:layout_width="72dip"
8. android:layout_height="72dip"
9. android:layout_margin="3dip"
10. android:adjustViewBounds="true"
11. android:contentDescription="@string/descr_image"
12. android:scaleType="centerCrop" />
13. <TextView
14. android:id="@+id/text"
15. android:layout_width="fill_parent"
16. android:layout_height="wrap_content"
17. android:layout_gravity="left|center_vertical"
18. android:layout_marginLeft="20dip"
19. android:textSize="22sp" />
20. </LinearLayout>

GridView异步加载图片显示

/2013.8.19_Universal_Image_Loader_Demo/res/layout/ac_image_grid.xml

1. <?xml version="1.0" encoding="utf-8"?>
2. <GridView xmlns:android="http://schemas.android.com/apk/res/android"
3. android:id="@+id/gridview"
4. android:layout_width="fill_parent"
5. android:layout_height="fill_parent"
6. android:gravity="center"
7. android:horizontalSpacing="4dip"
8. android:numColumns="3"
9. android:stretchMode="columnWidth"
10. android:verticalSpacing="4dip"
11. android:padding="4dip" />

/2013.8.19_Universal_Image_Loader_Demo/res/layout/item_grid_image.xml

1. <?xml version="1.0" encoding="utf-8"?>
2. <ImageView xmlns:android="http://schemas.android.com/apk/res/android"
3. android:id="@+id/image"
4. android:layout_width="fill_parent"
5. android:layout_height="120dip"
6. android:adjustViewBounds="true"
7. android:contentDescription="@string/descr_image"
8. android:scaleType="centerCrop" />

ViewPager异步加载图片显示

/2013.8.19_Universal_Image_Loader_Demo/res/layout/ac_image_pager.xml

1. <?xml version="1.0" encoding="utf-8"?>
2. <android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
3. android:id="@+id/pager"
4. android:layout_width="fill_parent"
5. android:layout_height="fill_parent" />

/2013.8.19_Universal_Image_Loader_Demo/res/layout/item_pager_image.xml

1. <?xml version="1.0" encoding="utf-8"?>
2. <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
3. android:layout_width="fill_parent"
4. android:layout_height="fill_parent"
5. android:padding="1dip" >
6. <ImageView
7. android:id="@+id/image"
8. android:layout_width="wrap_content"
9. android:layout_height="wrap_content"
10. android:layout_gravity="center"
11. android:adjustViewBounds="true"
12. android:contentDescription="@string/descr_image" />
13. <ProgressBar
14. android:id="@+id/loading"
15. android:layout_width="wrap_content"
16. android:layout_height="wrap_content"
17. android:layout_gravity="center"
18. android:visibility="gone" />
19. </FrameLayout>

Gallery画廊异步加载图片显示

/2013.8.19_Universal_Image_Loader_Demo/res/layout/ac_image_gallery.xml

1. <?xml version="1.0" encoding="utf-8"?>
2. <Gallery xmlns:android="http://schemas.android.com/apk/res/android"
3. android:id="@+id/gallery"
4. android:layout_width="fill_parent"
5. android:layout_height="wrap_content"
6. android:layout_gravity="center_vertical"
7. android:spacing="1dip" />

/2013.8.19_Universal_Image_Loader_Demo/res/layout/item_gallery_image.xml

1. <?xml version="1.0" encoding="utf-8"?>
2. <ImageView xmlns:android="http://schemas.android.com/apk/res/android"
3. android:id="@+id/image"
4. android:layout_width="120dip"
5. android:layout_height="120dip"
6. android:layout_gravity="center"
7. android:adjustViewBounds="true"
8. android:contentDescription="@string/descr_image"
9. android:scaleType="centerCrop" />

还有一个就是桌面小部件

以上只是布局文件，没有什么可以说，具体Activity代码实现如下：

先是这个：

/2013.8.19_Universal_Image_Loader_Demo/src/com/nostra13/example/universalimageloader/HomeActivity.java

主界面Activity代码

1. /*******************************************************************************
2. * Copyright 2011-2013 Sergey Tarasevich
3. *
4. * Licensed under the Apache License, Version 2.0 (the "License");
5. * you may not use this file except in compliance with the License.
6. * You may obtain a copy of the License at
7. *
8. * http://www.apache.org/licenses/LICENSE-2.0
9. *
10. * Unless required by applicable law or agreed to in writing, software
11. * distributed under the License is distributed on an "AS IS" BASIS,
12. * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13. * See the License for the specific language governing permissions and
14. * limitations under the License.
15. *******************************************************************************/
16. package com.nostra13.example.universalimageloader;
17. import static com.nostra13.example.universalimageloader.Constants.IMAGES;
18. import java.io.File;
19. import java.io.FileOutputStream;
20. import java.io.IOException;
21. import java.io.InputStream;
22. import android.content.Intent;
23. import android.os.Bundle;
24. import android.view.View;
25. import com.nostra13.example.universalimageloader.Constants.Extra;
26. import com.nostra13.universalimageloader.utils.L;
27. /**
28. * @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
29. */
30. public class HomeActivity extends BaseActivity {
31. private static final String TEST_FILE_NAME = "Universal Image Loader @#&=+-_.,!()~'%20.png";
32. @Override
33. public void onCreate(Bundle savedInstanceState) {
34. super.onCreate(savedInstanceState);
35. setContentView(R.layout.ac_home);
36. // 定义文件对象，目录：/mnt/sdcard, 文件名:TEST_FILE_NAME
37. File testImageOnSdCard = new File("/mnt/sdcard", TEST_FILE_NAME);
38. if (!testImageOnSdCard.exists()) {  // 如果文件不存在
39. // 把文件复制到SD卡
40. copyTestImageToSdCard(testImageOnSdCard);
41. }
42. }
43. // 点击进入ListView展示界面
44. public void onImageListClick(View view) {
45. Intent intent = new Intent(this, ImageListActivity.class);
46. intent.putExtra(Extra.IMAGES, IMAGES);
47. startActivity(intent);
48. }
49. // 点击进入GridView展示界面
50. public void onImageGridClick(View view) {
51. Intent intent = new Intent(this, ImageGridActivity.class);
52. intent.putExtra(Extra.IMAGES, IMAGES);
53. startActivity(intent);
54. }
55. // 点击进入ViewPager展示界面
56. public void onImagePagerClick(View view) {
57. Intent intent = new Intent(this, ImagePagerActivity.class);
58. intent.putExtra(Extra.IMAGES, IMAGES);
59. startActivity(intent);
60. }
61. // 点击进入画廊展示界面
62. public void onImageGalleryClick(View view) {
63. Intent intent = new Intent(this, ImageGalleryActivity.class);
64. intent.putExtra(Extra.IMAGES, IMAGES);
65. startActivity(intent);
66. }
67. @Override
68. public void onBackPressed() {
69. imageLoader.stop();     // 停止加载图片
70. super.onBackPressed();
71. }
72. /**
73. * 开一个线程把assert目录下的图片复制到SD卡目录下
74. * @param testImageOnSdCard
75. */
76. private void copyTestImageToSdCard(final File testImageOnSdCard) {
77. new Thread(new Runnable() {
78. @Override
79. public void run() {
80. try {
81. InputStream is = getAssets().open(TEST_FILE_NAME);
82. FileOutputStream fos = new FileOutputStream(testImageOnSdCard);
83. byte[] buffer = new byte[8192];
84. int read;
85. try {
86. while ((read = is.read(buffer)) != -1) {
87. fos.write(buffer, 0, read); // 写入输出流
88. }
89. } finally {
90. fos.flush();        // 写入SD卡
91. fos.close();        // 关闭输出流
92. is.close();         // 关闭输入流
93. }
94. } catch (IOException e) {
95. L.w("Can't copy test image onto SD card");
96. }
97. }
98. }).start();     // 启动线程
99. }
100. }

/2013.8.19_Universal_Image_Loader_Demo/src/com/nostra13/example/universalimageloader/BaseActivity.java

1. /*******************************************************************************
2. * Copyright 2011-2013 Sergey Tarasevich
3. *
4. * Licensed under the Apache License, Version 2.0 (the "License");
5. * you may not use this file except in compliance with the License.
6. * You may obtain a copy of the License at
7. *
8. * http://www.apache.org/licenses/LICENSE-2.0
9. *
10. * Unless required by applicable law or agreed to in writing, software
11. * distributed under the License is distributed on an "AS IS" BASIS,
12. * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13. * See the License for the specific language governing permissions and
14. * limitations under the License.
15. *******************************************************************************/
16. package com.nostra13.example.universalimageloader;
17. import android.app.Activity;
18. import android.view.Menu;
19. import android.view.MenuItem;
20. import com.nostra13.universalimageloader.core.ImageLoader;
21. /**
22. * @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
23. */
24. public abstract class BaseActivity extends Activity {
25. protected ImageLoader imageLoader = ImageLoader.getInstance();
26. @Override
27. public boolean onCreateOptionsMenu(Menu menu) {
28. // 加载菜单
29. getMenuInflater().inflate(R.menu.main_menu, menu);
30. return true;
31. }
32. @Override
33. public boolean onOptionsItemSelected(MenuItem item) {
34. switch (item.getItemId()) {
35. case R.id.item_clear_memory_cache:
36. imageLoader.clearMemoryCache();     // 清除内存缓存
37. return true;
38. case R.id.item_clear_disc_cache:
39. imageLoader.clearDiscCache();       // 清除SD卡中的缓存
40. return true;
41. default:
42. return false;
43. }
44. }
45. }

/2013.8.19_Universal_Image_Loader_Demo/src/com/nostra13/example/universalimageloader/AbsListViewBaseActivity.java

1. /*******************************************************************************
2. * Copyright 2011-2013 Sergey Tarasevich
3. *
4. * Licensed under the Apache License, Version 2.0 (the "License");
5. * you may not use this file except in compliance with the License.
6. * You may obtain a copy of the License at
7. *
8. * http://www.apache.org/licenses/LICENSE-2.0
9. *
10. * Unless required by applicable law or agreed to in writing, software
11. * distributed under the License is distributed on an "AS IS" BASIS,
12. * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13. * See the License for the specific language governing permissions and
14. * limitations under the License.
15. *******************************************************************************/
16. package com.nostra13.example.universalimageloader;
17. import android.os.Bundle;
18. import android.view.Menu;
19. import android.view.MenuItem;
20. import android.widget.AbsListView;
21. import com.nostra13.universalimageloader.core.assist.PauseOnScrollListener;
22. /**
23. *
24. *
25. * @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
26. */
27. public class AbsListViewBaseActivity extends BaseActivity {
28. protected static final String STATE_PAUSE_ON_SCROLL = "STATE_PAUSE_ON_SCROLL";
29. protected static final String STATE_PAUSE_ON_FLING = "STATE_PAUSE_ON_FLING";
30. protected AbsListView listView;
31. protected boolean pauseOnScroll = false;
32. protected boolean pauseOnFling = true;
33. @Override
34. public void onRestoreInstanceState(Bundle savedInstanceState) {
35. pauseOnScroll = savedInstanceState.getBoolean(STATE_PAUSE_ON_SCROLL, false);
36. pauseOnFling = savedInstanceState.getBoolean(STATE_PAUSE_ON_FLING, true);
37. }
38. @Override
39. public void onResume() {
40. super.onResume();
41. applyScrollListener();
42. }
43. private void applyScrollListener() {
44. listView.setOnScrollListener(new PauseOnScrollListener(imageLoader, pauseOnScroll, pauseOnFling));
45. }
46. @Override
47. public void onSaveInstanceState(Bundle outState) {
48. outState.putBoolean(STATE_PAUSE_ON_SCROLL, pauseOnScroll);
49. outState.putBoolean(STATE_PAUSE_ON_FLING, pauseOnFling);
50. }
51. @Override
52. public boolean onPrepareOptionsMenu(Menu menu) {
53. MenuItem pauseOnScrollItem = menu.findItem(R.id.item_pause_on_scroll);
54. pauseOnScrollItem.setVisible(true);
55. pauseOnScrollItem.setChecked(pauseOnScroll);
56. MenuItem pauseOnFlingItem = menu.findItem(R.id.item_pause_on_fling);
57. pauseOnFlingItem.setVisible(true);
58. pauseOnFlingItem.setChecked(pauseOnFling);
59. return true;
60. }
61. @Override
62. public boolean onOptionsItemSelected(MenuItem item) {
63. switch (item.getItemId()) {
64. case R.id.item_pause_on_scroll:
65. pauseOnScroll = !pauseOnScroll;
66. item.setChecked(pauseOnScroll);
67. applyScrollListener();
68. return true;
69. case R.id.item_pause_on_fling:
70. pauseOnFling = !pauseOnFling;
71. item.setChecked(pauseOnFling);
72. applyScrollListener();
73. return true;
74. default:
75. return super.onOptionsItemSelected(item);
76. }
77. }
78. }

/2013.8.19_Universal_Image_Loader_Demo/src/com/nostra13/example/universalimageloader/Constants.java

常量类代码

1. /*******************************************************************************
2. * Copyright 2011-2013 Sergey Tarasevich
3. *
4. * Licensed under the Apache License, Version 2.0 (the "License");
5. * you may not use this file except in compliance with the License.
6. * You may obtain a copy of the License at
7. *
8. * http://www.apache.org/licenses/LICENSE-2.0
9. *
10. * Unless required by applicable law or agreed to in writing, software
11. * distributed under the License is distributed on an "AS IS" BASIS,
12. * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13. * See the License for the specific language governing permissions and
14. * limitations under the License.
15. *******************************************************************************/
16. package com.nostra13.example.universalimageloader;
17. /**
18. * @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
19. * 常量类
20. */
21. public final class Constants {
22. // 一堆图片链接
23. public static final String[] IMAGES = new String[] {
24. // Heavy images
25. "https://lh6.googleusercontent.com/-jZgveEqb6pg/T3R4kXScycI/AAAAAAAAAE0/xQ7CvpfXDzc/s1024/sample_image_01.jpg",
26. "https://lh4.googleusercontent.com/-K2FMuOozxU0/T3R4lRAiBTI/AAAAAAAAAE8/a3Eh9JvnnzI/s1024/sample_image_02.jpg",
27. "https://lh5.googleusercontent.com/-SCS5C646rxM/T3R4l7QB6xI/AAAAAAAAAFE/xLcuVv3CUyA/s1024/sample_image_03.jpg",
28. "https://lh6.googleusercontent.com/-f0NJR6-_Thg/T3R4mNex2wI/AAAAAAAAAFI/45oug4VE8MI/s1024/sample_image_04.jpg",
29. "https://lh3.googleusercontent.com/-n-xcJmiI0pg/T3R4mkSchHI/AAAAAAAAAFU/EoiNNb7kk3A/s1024/sample_image_05.jpg",
30. "https://lh3.googleusercontent.com/-X43vAudm7f4/T3R4nGSChJI/AAAAAAAAAFk/3bna6D-2EE8/s1024/sample_image_06.jpg",
31. "https://lh5.googleusercontent.com/-MpZneqIyjXU/T3R4nuGO1aI/AAAAAAAAAFg/r09OPjLx1ZY/s1024/sample_image_07.jpg",
32. "https://lh6.googleusercontent.com/-ql3YNfdClJo/T3XvW9apmFI/AAAAAAAAAL4/_6HFDzbahc4/s1024/sample_image_08.jpg",
33. "https://lh5.googleusercontent.com/-Pxa7eqF4cyc/T3R4oasvPEI/AAAAAAAAAF0/-uYDH92h8LA/s1024/sample_image_09.jpg",
34. "https://lh4.googleusercontent.com/-Li-rjhFEuaI/T3R4o-VUl4I/AAAAAAAAAF8/5E5XdMnP1oE/s1024/sample_image_10.jpg",
35. "https://lh5.googleusercontent.com/-_HU4fImgFhA/T3R4pPVIwWI/AAAAAAAAAGA/0RfK_Vkgth4/s1024/sample_image_11.jpg",
36. "https://lh6.googleusercontent.com/-0gnNrVjwa0Y/T3R4peGYJwI/AAAAAAAAAGU/uX_9wvRPM9I/s1024/sample_image_12.jpg",
37. "https://lh3.googleusercontent.com/-HBxuzALS_Zs/T3R4qERykaI/AAAAAAAAAGQ/_qQ16FaZ1q0/s1024/sample_image_13.jpg",
38. "https://lh4.googleusercontent.com/-cKojDrARNjQ/T3R4qfWSGPI/AAAAAAAAAGY/MR5dnbNaPyY/s1024/sample_image_14.jpg",
39. "https://lh3.googleusercontent.com/-WujkdYfcyZ8/T3R4qrIMGUI/AAAAAAAAAGk/277LIdgvnjg/s1024/sample_image_15.jpg",
40. "https://lh6.googleusercontent.com/-FMHR7Vy3PgI/T3R4rOXlEKI/AAAAAAAAAGs/VeXrDNDBkaw/s1024/sample_image_16.jpg",
41. "https://lh4.googleusercontent.com/-mrR0AJyNTH0/T3R4rZs6CuI/AAAAAAAAAG0/UE1wQqCOqLA/s1024/sample_image_17.jpg",
42. "https://lh6.googleusercontent.com/-z77w0eh3cow/T3R4rnLn05I/AAAAAAAAAG4/BaerfWoNucU/s1024/sample_image_18.jpg",
43. "https://lh5.googleusercontent.com/-aWVwh1OU5Bk/T3R4sAWw0yI/AAAAAAAAAHE/4_KAvJttFwA/s1024/sample_image_19.jpg",
44. "https://lh6.googleusercontent.com/-q-js52DMnWQ/T3R4tZhY2sI/AAAAAAAAAHM/A8kjp2Ivdqg/s1024/sample_image_20.jpg",
45. "https://lh5.googleusercontent.com/-_jIzvvzXKn4/T3R4t7xpdVI/AAAAAAAAAHU/7QC6eZ10jgs/s1024/sample_image_21.jpg",
46. "https://lh3.googleusercontent.com/-lnGi4IMLpwU/T3R4uCMa7vI/AAAAAAAAAHc/1zgzzz6qTpk/s1024/sample_image_22.jpg",
47. "https://lh5.googleusercontent.com/-fFCzKjFPsPc/T3R4u0SZPFI/AAAAAAAAAHk/sbgjzrktOK0/s1024/sample_image_23.jpg",
48. "https://lh4.googleusercontent.com/-8TqoW5gBE_Y/T3R4vBS3NPI/AAAAAAAAAHs/EZYvpNsaNXk/s1024/sample_image_24.jpg",
49. "https://lh6.googleusercontent.com/-gc4eQ3ySdzs/T3R4vafoA7I/AAAAAAAAAH4/yKii5P6tqDE/s1024/sample_image_25.jpg",
50. "https://lh5.googleusercontent.com/--NYOPCylU7Q/T3R4vjAiWkI/AAAAAAAAAH8/IPNx5q3ptRA/s1024/sample_image_26.jpg",
51. "https://lh6.googleusercontent.com/-9IJM8so4vCI/T3R4vwJO2yI/AAAAAAAAAIE/ljlr-cwuqZM/s1024/sample_image_27.jpg",
52. "https://lh4.googleusercontent.com/-KW6QwOHfhBs/T3R4w0RsQiI/AAAAAAAAAIM/uEFLVgHPFCk/s1024/sample_image_28.jpg",
53. "https://lh4.googleusercontent.com/-z2557Ec1ctY/T3R4x3QA2hI/AAAAAAAAAIk/9-GzPL1lTWE/s1024/sample_image_29.jpg",
54. "https://lh5.googleusercontent.com/-LaKXAn4Kr1c/T3R4yc5b4lI/AAAAAAAAAIY/fMgcOVQfmD0/s1024/sample_image_30.jpg",
55. "https://lh4.googleusercontent.com/-F9LRToJoQdo/T3R4yrLtyQI/AAAAAAAAAIg/ri9uUCWuRmo/s1024/sample_image_31.jpg",
56. "https://lh4.googleusercontent.com/-6X-xBwP-QpI/T3R4zGVboII/AAAAAAAAAIs/zYH4PjjngY0/s1024/sample_image_32.jpg",
57. "https://lh5.googleusercontent.com/-VdLRjbW4LAs/T3R4zXu3gUI/AAAAAAAAAIw/9aFp9t7mCPg/s1024/sample_image_33.jpg",
58. "https://lh6.googleusercontent.com/-gL6R17_fDJU/T3R4zpIXGjI/AAAAAAAAAI8/Q2Vjx-L9X20/s1024/sample_image_34.jpg",
59. "https://lh3.googleusercontent.com/-1fGH4YJXEzo/T3R40Y1B7KI/AAAAAAAAAJE/MnTsa77g-nk/s1024/sample_image_35.jpg",
60. "https://lh4.googleusercontent.com/-Ql0jHSrea-A/T3R403mUfFI/AAAAAAAAAJM/qzI4SkcH9tY/s1024/sample_image_36.jpg",
61. "https://lh5.googleusercontent.com/-BL5FIBR_tzI/T3R41DA0AKI/AAAAAAAAAJk/GZfeeb-SLM0/s1024/sample_image_37.jpg",
62. "https://lh4.googleusercontent.com/-wF2Vc9YDutw/T3R41fR2BCI/AAAAAAAAAJc/JdU1sHdMRAk/s1024/sample_image_38.jpg",
63. "https://lh6.googleusercontent.com/-ZWHiPehwjTI/T3R41zuaKCI/AAAAAAAAAJg/hR3QJ1v3REg/s1024/sample_image_39.jpg",
64. // Light images
65. "http://tabletpcssource.com/wp-content/uploads/2011/05/android-logo.png",
66. "http://simpozia.com/pages/images/stories/windows-icon.png",
67. "https://si0.twimg.com/profile_images/1135218951/gmail_profile_icon3_normal.png",
68. "http://www.krify.net/wp-content/uploads/2011/09/Macromedia_Flash_dock_icon.png",
69. "http://radiotray.sourceforge.net/radio.png",
70. "http://www.bandwidthblog.com/wp-content/uploads/2011/11/twitter-logo.png",
71. "http://weloveicons.s3.amazonaws.com/icons/100907_itunes1.png",
72. "http://weloveicons.s3.amazonaws.com/icons/100929_applications.png",
73. "http://www.idyllicmusic.com/index_files/get_apple-iphone.png",
74. "http://www.frenchrevolutionfood.com/wp-content/uploads/2009/04/Twitter-Bird.png",
75. "http://3.bp.blogspot.com/-ka5MiRGJ_S4/TdD9OoF6bmI/AAAAAAAAE8k/7ydKtptUtSg/s1600/Google_Sky%2BMaps_Android.png",
76. "http://www.desiredsoft.com/images/icon_webhosting.png",
77. "http://goodereader.com/apps/wp-content/uploads/downloads/thumbnails/2012/01/hi-256-0-99dda8c730196ab93c67f0659d5b8489abdeb977.png",
78. "http://1.bp.blogspot.com/-mlaJ4p_3rBU/TdD9OWxN8II/AAAAAAAAE8U/xyynWwr3_4Q/s1600/antivitus_free.png",
79. "http://cdn3.iconfinder.com/data/icons/transformers/computer.png",
80. "http://cdn.geekwire.com/wp-content/uploads/2011/04/firefox.png?7794fe",
81. "https://ssl.gstatic.com/android/market/com.rovio.angrybirdsseasons/hi-256-9-347dae230614238a639d21508ae492302340b2ba",
82. "http://androidblaze.com/wp-content/uploads/2011/12/tablet-pc-256x256.jpg",
83. "http://www.theblaze.com/wp-content/uploads/2011/08/Apple.png",
84. "http://1.bp.blogspot.com/-y-HQwQ4Kuu0/TdD9_iKIY7I/AAAAAAAAE88/3G4xiclDZD0/s1600/Twitter_Android.png",
85. "http://3.bp.blogspot.com/-nAf4IMJGpc8/TdD9OGNUHHI/AAAAAAAAE8E/VM9yU_lIgZ4/s1600/Adobe%2BReader_Android.png",
86. "http://cdn.geekwire.com/wp-content/uploads/2011/05/oovoo-android.png?7794fe",
87. "http://icons.iconarchive.com/icons/kocco/ndroid/128/android-market-2-icon.png",
88. "http://thecustomizewindows.com/wp-content/uploads/2011/11/Nicest-Android-Live-Wallpapers.png",
89. "http://c.wrzuta.pl/wm16596/a32f1a47002ab3a949afeb4f",
90. "http://macprovid.vo.llnwd.net/o43/hub/media/1090/6882/01_headline_Muse.jpg",
91. // Special cases
92. "http://cdn.urbanislandz.com/wp-content/uploads/2011/10/MMSposter-large.jpg", // very large image
93. "file:///sdcard/Universal Image Loader @#&=+-_.,!()~'%20.png", // Image from SD card with encoded symbols
94. "assets://Living Things @#&=+-_.,!()~'%20.jpg", // Image from assets
95. "drawable://" + R.drawable.ic_launcher, // Image from drawables
96. "http://upload.wikimedia.org/wikipedia/ru/b/b6/袣邪泻_泻芯褌_褋_屑褘褕邪屑懈_胁芯械胁邪谢.png", // Link with UTF-8
97. "https://www.eff.org/sites/default/files/chrome150_0.jpg", // Image from HTTPS
98. "http://bit.ly/soBiXr", // Redirect link
99. "http://img001.us.expono.com/100001/100001-1bc30-2d736f_m.jpg", // EXIF
100. "", // Empty link
101. "http://wrong.site.com/corruptedLink", // Wrong link
102. };
103. private Constants() {
104. }
105. // 配置
106. public static class Config {
107. public static final boolean DEVELOPER_MODE = false;
108. }
109. // 额外类
110. public static class Extra {
111. public static final String IMAGES = "com.nostra13.example.universalimageloader.IMAGES";
112. public static final String IMAGE_POSITION = "com.nostra13.example.universalimageloader.IMAGE_POSITION";
113. }
114. }

/2013.8.19_Universal_Image_Loader_Demo/src/com/nostra13/example/universalimageloader/ImageListActivity.java

1. /*******************************************************************************
2. * Copyright 2011-2013 Sergey Tarasevich
3. *
4. * Licensed under the Apache License, Version 2.0 (the "License");
5. * you may not use this file except in compliance with the License.
6. * You may obtain a copy of the License at
7. *
8. * http://www.apache.org/licenses/LICENSE-2.0
9. *
10. * Unless required by applicable law or agreed to in writing, software
11. * distributed under the License is distributed on an "AS IS" BASIS,
12. * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13. * See the License for the specific language governing permissions and
14. * limitations under the License.
15. *******************************************************************************/
16. package com.nostra13.example.universalimageloader;
17. import java.util.Collections;
18. import java.util.LinkedList;
19. import java.util.List;
20. import android.content.Intent;
21. import android.graphics.Bitmap;
22. import android.os.Bundle;
23. import android.view.View;
24. import android.view.ViewGroup;
25. import android.widget.AdapterView;
26. import android.widget.AdapterView.OnItemClickListener;
27. import android.widget.BaseAdapter;
28. import android.widget.ImageView;
29. import android.widget.ListView;
30. import android.widget.TextView;
31. import com.nostra13.example.universalimageloader.Constants.Extra;
32. import com.nostra13.universalimageloader.core.DisplayImageOptions;
33. import com.nostra13.universalimageloader.core.assist.ImageLoadingListener;
34. import com.nostra13.universalimageloader.core.assist.SimpleImageLoadingListener;
35. import com.nostra13.universalimageloader.core.display.FadeInBitmapDisplayer;
36. import com.nostra13.universalimageloader.core.display.RoundedBitmapDisplayer;
37. /**
38. * @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
39. */
40. public class ImageListActivity extends AbsListViewBaseActivity {
41. DisplayImageOptions options;        // DisplayImageOptions是用于设置图片显示的类
42. String[] imageUrls;                 // 图片路径
43. @Override
44. public void onCreate(Bundle savedInstanceState) {
45. super.onCreate(savedInstanceState);
46. setContentView(R.layout.ac_image_list);
47. Bundle bundle = getIntent().getExtras();
48. imageUrls = bundle.getStringArray(Extra.IMAGES);
49. // 使用DisplayImageOptions.Builder()创建DisplayImageOptions
50. options = new DisplayImageOptions.Builder()
51. .showStubImage(R.drawable.ic_stub)          // 设置图片下载期间显示的图片
52. .showImageForEmptyUri(R.drawable.ic_empty)  // 设置图片Uri为空或是错误的时候显示的图片
53. .showImageOnFail(R.drawable.ic_error)       // 设置图片加载或解码过程中发生错误显示的图片
54. .cacheInMemory(true)                        // 设置下载的图片是否缓存在内存中
55. .cacheOnDisc(true)                          // 设置下载的图片是否缓存在SD卡中
56. .displayer(new RoundedBitmapDisplayer(20))  // 设置成圆角图片
57. .build();                                   // 创建配置过得DisplayImageOption对象
58. listView = (ListView) findViewById(android.R.id.list);
59. ((ListView) listView).setAdapter(new ItemAdapter());
60. listView.setOnItemClickListener(new OnItemClickListener() {
61. @Override
62. public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
63. // 点击列表项转入ViewPager显示界面
64. startImagePagerActivity(position);
65. }
66. });
67. }
68. @Override
69. public void onBackPressed() {
70. AnimateFirstDisplayListener.displayedImages.clear();
71. super.onBackPressed();
72. }
73. private void startImagePagerActivity(int position) {
74. Intent intent = new Intent(this, ImagePagerActivity.class);
75. intent.putExtra(Extra.IMAGES, imageUrls);
76. intent.putExtra(Extra.IMAGE_POSITION, position);
77. startActivity(intent);
78. }
79. /**
80. *
81. * 自定义列表项适配器
82. *
83. */
84. class ItemAdapter extends BaseAdapter {
85. private ImageLoadingListener animateFirstListener = new AnimateFirstDisplayListener();
86. private class ViewHolder {
87. public TextView text;
88. public ImageView image;
89. }
90. @Override
91. public int getCount() {
92. return imageUrls.length;
93. }
94. @Override
95. public Object getItem(int position) {
96. return position;
97. }
98. @Override
99. public long getItemId(int position) {
100. return position;
101. }
102. @Override
103. public View getView(final int position, View convertView, ViewGroup parent) {
104. View view = convertView;
105. final ViewHolder holder;
106. if (convertView == null) {
107. view = getLayoutInflater().inflate(R.layout.item_list_image, parent, false);
108. holder = new ViewHolder();
109. holder.text = (TextView) view.findViewById(R.id.text);
110. holder.image = (ImageView) view.findViewById(R.id.image);
111. view.setTag(holder);        // 给View添加一个格外的数据
112. } else {
113. holder = (ViewHolder) view.getTag(); // 把数据取出来
114. }
115. holder.text.setText("Item " + (position + 1));  // TextView设置文本
116. /**
117. * 显示图片
118. * 参数1：图片url
119. * 参数2：显示图片的控件
120. * 参数3：显示图片的设置
121. * 参数4：监听器
122. */
123. imageLoader.displayImage(imageUrls[position], holder.image, options, animateFirstListener);
124. return view;
125. }
126. }
127. /**
128. * 图片加载第一次显示监听器
129. * @author Administrator
130. *
131. */
132. private static class AnimateFirstDisplayListener extends SimpleImageLoadingListener {
133. static final List<String> displayedImages = Collections.synchronizedList(new LinkedList<String>());
134. @Override
135. public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
136. if (loadedImage != null) {
137. ImageView imageView = (ImageView) view;
138. // 是否第一次显示
139. boolean firstDisplay = !displayedImages.contains(imageUri);
140. if (firstDisplay) {
141. // 图片淡入效果
142. FadeInBitmapDisplayer.animate(imageView, 500);
143. displayedImages.add(imageUri);
144. }
145. }
146. }
147. }
148. }

/2013.8.19_Universal_Image_Loader_Demo/src/com/nostra13/example/universalimageloader/ImageGridActivity.java

网格视图Activity

1. /*******************************************************************************
2. * Copyright 2011-2013 Sergey Tarasevich
3. *
4. * Licensed under the Apache License, Version 2.0 (the "License");
5. * you may not use this file except in compliance with the License.
6. * You may obtain a copy of the License at
7. *
8. * http://www.apache.org/licenses/LICENSE-2.0
9. *
10. * Unless required by applicable law or agreed to in writing, software
11. * distributed under the License is distributed on an "AS IS" BASIS,
12. * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13. * See the License for the specific language governing permissions and
14. * limitations under the License.
15. *******************************************************************************/
16. package com.nostra13.example.universalimageloader;
17. import android.content.Intent;
18. import android.graphics.Bitmap;
19. import android.os.Bundle;
20. import android.view.View;
21. import android.view.ViewGroup;
22. import android.widget.AdapterView;
23. import android.widget.AdapterView.OnItemClickListener;
24. import android.widget.BaseAdapter;
25. import android.widget.GridView;
26. import android.widget.ImageView;
27. import com.nostra13.example.universalimageloader.Constants.Extra;
28. import com.nostra13.universalimageloader.core.DisplayImageOptions;
29. /**
30. * 网格视图显示Activity
31. * @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
32. */
33. public class ImageGridActivity extends AbsListViewBaseActivity {
34. String[] imageUrls;                 // 图片Url
35. DisplayImageOptions options;        // 显示图片的设置
36. @Override
37. public void onCreate(Bundle savedInstanceState) {
38. super.onCreate(savedInstanceState);
39. setContentView(R.layout.ac_image_grid);
40. Bundle bundle = getIntent().getExtras();
41. imageUrls = bundle.getStringArray(Extra.IMAGES);
42. options = new DisplayImageOptions.Builder()
43. .showStubImage(R.drawable.ic_stub)
44. .showImageForEmptyUri(R.drawable.ic_empty)
45. .showImageOnFail(R.drawable.ic_error)
46. .cacheInMemory(true)
47. .cacheOnDisc(true)
48. .bitmapConfig(Bitmap.Config.RGB_565)     //设置图片的解码类型
49. .build();
50. listView = (GridView) findViewById(R.id.gridview);
51. ((GridView) listView).setAdapter(new ImageAdapter());           // 填充数据
52. listView.setOnItemClickListener(new OnItemClickListener() {
53. @Override
54. public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
55. startImagePagerActivity(position);
56. }
57. });
58. }
59. private void startImagePagerActivity(int position) {
60. Intent intent = new Intent(this, ImagePagerActivity.class);
61. intent.putExtra(Extra.IMAGES, imageUrls);
62. intent.putExtra(Extra.IMAGE_POSITION, position);
63. startActivity(intent);
64. }
65. public class ImageAdapter extends BaseAdapter {
66. @Override
67. public int getCount() {
68. return imageUrls.length;
69. }
70. @Override
71. public Object getItem(int position) {
72. return null;
73. }
74. @Override
75. public long getItemId(int position) {
76. return position;
77. }
78. @Override
79. public View getView(int position, View convertView, ViewGroup parent) {
80. final ImageView imageView;
81. if (convertView == null) {
82. imageView = (ImageView) getLayoutInflater().inflate(R.layout.item_grid_image, parent, false);
83. } else {
84. imageView = (ImageView) convertView;
85. }
86. // 将图片显示任务增加到执行池，图片将被显示到ImageView当轮到此ImageView
87. imageLoader.displayImage(imageUrls[position], imageView, options);
88. return imageView;
89. }
90. }
91. }

/2013.8.19_Universal_Image_Loader_Demo/src/com/nostra13/example/universalimageloader/ImagePagerActivity.java

ViewPager视图Activity

1. /*******************************************************************************
2. * Copyright 2011-2013 Sergey Tarasevich
3. *
4. * Licensed under the Apache License, Version 2.0 (the "License");
5. * you may not use this file except in compliance with the License.
6. * You may obtain a copy of the License at
7. *
8. * http://www.apache.org/licenses/LICENSE-2.0
9. *
10. * Unless required by applicable law or agreed to in writing, software
11. * distributed under the License is distributed on an "AS IS" BASIS,
12. * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13. * See the License for the specific language governing permissions and
14. * limitations under the License.
15. *******************************************************************************/
16. package com.nostra13.example.universalimageloader;
17. import android.graphics.Bitmap;
18. import android.os.Bundle;
19. import android.os.Parcelable;
20. import android.support.v4.view.PagerAdapter;
21. import android.support.v4.view.ViewPager;
22. import android.view.LayoutInflater;
23. import android.view.View;
24. import android.view.ViewGroup;
25. import android.widget.ImageView;
26. import android.widget.ProgressBar;
27. import android.widget.Toast;
28. import com.nostra13.example.universalimageloader.Constants.Extra;
29. import com.nostra13.universalimageloader.core.DisplayImageOptions;
30. import com.nostra13.universalimageloader.core.assist.FailReason;
31. import com.nostra13.universalimageloader.core.assist.ImageScaleType;
32. import com.nostra13.universalimageloader.core.assist.SimpleImageLoadingListener;
33. import com.nostra13.universalimageloader.core.display.FadeInBitmapDisplayer;
34. /**
35. * ViewPager页面显示Activity
36. * @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
37. */
38. public class ImagePagerActivity extends BaseActivity {
39. private static final String STATE_POSITION = "STATE_POSITION";
40. DisplayImageOptions options;
41. ViewPager pager;
42. public void onCreate(Bundle savedInstanceState) {
43. super.onCreate(savedInstanceState);
44. setContentView(R.layout.ac_image_pager);
45. Bundle bundle = getIntent().getExtras();
46. String[] imageUrls = bundle.getStringArray(Extra.IMAGES);
47. // 当前显示View的位置
48. int pagerPosition = bundle.getInt(Extra.IMAGE_POSITION, 0);
49. // 如果之前有保存用户数据
50. if (savedInstanceState != null) {
51. pagerPosition = savedInstanceState.getInt(STATE_POSITION);
52. }
53. options = new DisplayImageOptions.Builder()
54. .showImageForEmptyUri(R.drawable.ic_empty)
55. .showImageOnFail(R.drawable.ic_error)
56. .resetViewBeforeLoading(true)
57. .cacheOnDisc(true)
58. .imageScaleType(ImageScaleType.EXACTLY)
59. .bitmapConfig(Bitmap.Config.RGB_565)
60. .displayer(new FadeInBitmapDisplayer(300))
61. .build();
62. pager = (ViewPager) findViewById(R.id.pager);
63. pager.setAdapter(new ImagePagerAdapter(imageUrls));
64. pager.setCurrentItem(pagerPosition);    // 显示当前位置的View
65. }
66. @Override
67. public void onSaveInstanceState(Bundle outState) {
68. // 保存用户数据
69. outState.putInt(STATE_POSITION, pager.getCurrentItem());
70. }
71. private class ImagePagerAdapter extends PagerAdapter {
72. private String[] images;
73. private LayoutInflater inflater;
74. ImagePagerAdapter(String[] images) {
75. this.images = images;
76. inflater = getLayoutInflater();
77. }
78. @Override
79. public void destroyItem(ViewGroup container, int position, Object object) {
80. ((ViewPager) container).removeView((View) object);
81. }
82. @Override
83. public void finishUpdate(View container) {
84. }
85. @Override
86. public int getCount() {
87. return images.length;
88. }
89. @Override
90. public Object instantiateItem(ViewGroup view, int position) {
91. View imageLayout = inflater.inflate(R.layout.item_pager_image, view, false);
92. ImageView imageView = (ImageView) imageLayout.findViewById(R.id.image);
93. final ProgressBar spinner = (ProgressBar) imageLayout.findViewById(R.id.loading);
94. imageLoader.displayImage(images[position], imageView, options, new SimpleImageLoadingListener() {
95. @Override
96. public void onLoadingStarted(String imageUri, View view) {
97. spinner.setVisibility(View.VISIBLE);
98. }
99. @Override
100. public void onLoadingFailed(String imageUri, View view, FailReason failReason) {
101. String message = null;
102. switch (failReason.getType()) {     // 获取图片失败类型
103. case IO_ERROR:              // 文件I/O错误
104. message = "Input/Output error";
105. break;
106. case DECODING_ERROR:        // 解码错误
107. message = "Image can't be decoded";
108. break;
109. case NETWORK_DENIED:        // 网络延迟
110. message = "Downloads are denied";
111. break;
112. case OUT_OF_MEMORY:         // 内存不足
113. message = "Out Of Memory error";
114. break;
115. case UNKNOWN:               // 原因不明
116. message = "Unknown error";
117. break;
118. }
119. Toast.makeText(ImagePagerActivity.this, message, Toast.LENGTH_SHORT).show();
120. spinner.setVisibility(View.GONE);
121. }
122. @Override
123. public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
124. spinner.setVisibility(View.GONE);       // 不显示圆形进度条
125. }
126. });
127. ((ViewPager) view).addView(imageLayout, 0);     // 将图片增加到ViewPager
128. return imageLayout;
129. }
130. @Override
131. public boolean isViewFromObject(View view, Object object) {
132. return view.equals(object);
133. }
134. @Override
135. public void restoreState(Parcelable state, ClassLoader loader) {
136. }
137. @Override
138. public Parcelable saveState() {
139. return null;
140. }
141. @Override
142. public void startUpdate(View container) {
143. }
144. }
145. }

/2013.8.19_Universal_Image_Loader_Demo/src/com/nostra13/example/universalimageloader/ImageGalleryActivity.java

画廊视图的Activity

1. /*******************************************************************************
2. * Copyright 2011-2013 Sergey Tarasevich
3. *
4. * Licensed under the Apache License, Version 2.0 (the "License");
5. * you may not use this file except in compliance with the License.
6. * You may obtain a copy of the License at
7. *
8. * http://www.apache.org/licenses/LICENSE-2.0
9. *
10. * Unless required by applicable law or agreed to in writing, software
11. * distributed under the License is distributed on an "AS IS" BASIS,
12. * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13. * See the License for the specific language governing permissions and
14. * limitations under the License.
15. *******************************************************************************/
16. package com.nostra13.example.universalimageloader;
17. import android.content.Intent;
18. import android.graphics.Bitmap;
19. import android.os.Bundle;
20. import android.view.View;
21. import android.view.ViewGroup;
22. import android.widget.AdapterView;
23. import android.widget.AdapterView.OnItemClickListener;
24. import android.widget.BaseAdapter;
25. import android.widget.Gallery;
26. import android.widget.ImageView;
27. import com.nostra13.example.universalimageloader.Constants.Extra;
28. import com.nostra13.universalimageloader.core.DisplayImageOptions;
29. /**
30. * 画廊视图Activity
31. * @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
32. */
33. @SuppressWarnings("deprecation")
34. public class ImageGalleryActivity extends BaseActivity {
35. String[] imageUrls;
36. DisplayImageOptions options;
37. public void onCreate(Bundle savedInstanceState) {
38. super.onCreate(savedInstanceState);
39. setContentView(R.layout.ac_image_gallery);
40. Bundle bundle = getIntent().getExtras();
41. imageUrls = bundle.getStringArray(Extra.IMAGES);
42. options = new DisplayImageOptions.Builder()
43. .showStubImage(R.drawable.ic_stub)
44. .showImageForEmptyUri(R.drawable.ic_empty)
45. .showImageOnFail(R.drawable.ic_error)
46. .cacheInMemory(true)
47. .cacheOnDisc(true)
48. .bitmapConfig(Bitmap.Config.RGB_565)
49. .build();
50. // 自API 16之后就被抛弃了
51. Gallery gallery = (Gallery) findViewById(R.id.gallery);
52. gallery.setAdapter(new ImageGalleryAdapter());
53. gallery.setOnItemClickListener(new OnItemClickListener() {
54. @Override
55. public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
56. startImagePagerActivity(position);
57. }
58. });
59. }
60. private void startImagePagerActivity(int position) {
61. Intent intent = new Intent(this, ImagePagerActivity.class);
62. intent.putExtra(Extra.IMAGES, imageUrls);
63. intent.putExtra(Extra.IMAGE_POSITION, position);
64. startActivity(intent);
65. }
66. private class ImageGalleryAdapter extends BaseAdapter {
67. @Override
68. public int getCount() {
69. return imageUrls.length;
70. }
71. @Override
72. public Object getItem(int position) {
73. return position;
74. }
75. @Override
76. public long getItemId(int position) {
77. return position;
78. }
79. @Override
80. public View getView(int position, View convertView, ViewGroup parent) {
81. ImageView imageView = (ImageView) convertView;
82. if (imageView == null) {
83. imageView = (ImageView) getLayoutInflater().inflate(R.layout.item_gallery_image, parent, false);
84. }
85. imageLoader.displayImage(imageUrls[position], imageView, options);
86. return imageView;
87. }
88. }
89. }

关于桌面控件的代码我就不贴了，朋友们可以自己下载我这个Demo

还有就是Manifest文件代码

1. <?xml version="1.0" encoding="utf-8"?>
2. <manifest xmlns:android="http://schemas.android.com/apk/res/android"
3. package="com.nostra13.example.universalimageloader"
4. android:versionCode="35"
5. android:versionName="1.8.7" >
6. <uses-sdk
7. android:minSdkVersion="5"
8. android:targetSdkVersion="16" />
9. <!-- 网络访问权限 -->
10. <uses-permission android:name="android.permission.INTERNET" />
11. <!-- 文件写入SD卡权限 -->
12. <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
13. <application
14. android:name=".UILApplication"
15. android:icon="@drawable/ic_launcher"
16. android:label="@string/app_name" >
17. <activity
18. android:name=".HomeActivity"
19. android:label="@string/app_name" >
20. <intent-filter>
21. <action android:name="android.intent.action.MAIN" />
22. <category android:name="android.intent.category.LAUNCHER" />
23. </intent-filter>
24. </activity>
25. <activity
26. android:name=".ImageListActivity"
27. android:label="@string/ac_name_image_list" />
28. <activity
29. android:name=".ImageGridActivity"
30. android:label="@string/ac_name_image_grid" />
31. <activity
32. android:name=".ImagePagerActivity"
33. android:label="@string/ac_name_image_pager" />
34. <activity
35. android:name=".ImageGalleryActivity"
36. android:label="@string/ac_name_image_gallery" />
37. <!-- Widget -->
38. <receiver android:name=".widget.UILWidgetProvider" >
39. <meta-data
40. android:name="android.appwidget.provider"
41. android:resource="@xml/widget_provider" />
42. <intent-filter>
43. <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
44. </intent-filter>
45. </receiver>
46. </application>
47. </manifest>

以上的代码已经很详尽了，读者可以把它整合到你的项目当中，就可以实现完美异步加载图片。在这里要感谢那些为我们开源的大神们，他们的贡献让我们这些开发者更快更有效的完成工作，希望我们的开源会越做越好，我相信我们的开发者有这个能力。