我试图从Web服务器读取JSON文件，并将它们转换为列表视图的位图图像。问题是我试过这个例子，但试图创建一个文件系统目录："resolveUri failed on bad bitmap uri" when putting image on ListView;这可能是一个不正确的路径/技术？我收到一个malformedURI Execption，当我尝试使用常规JSON字符串作为图像时，我收到badURI Exception。关于如何正确解码JSON提要的任何想法将不胜感激。如果您想查看个人资料图片标记，则JSON Feed位于此处：http://shipstudent.com/complaint_desk/androidcentralwall.php。如果您需要更多信息，请与我们联系。
public void updateJSONdata() {
mCommentList = new ArrayList<HashMap<String, String>>();
JSONParser jParser = new JSONParser();
JSONObject json = jParser.getJSONFromUrl(READ_COMMENTS_URL);
try {
allPosts = json.getJSONArray(TAG_POSTS);
// looping through all posts according to the json object returned
for (int i = 0; i < allPosts.length(); i++) {
JSONObject c = allPosts.getJSONObject(i);
// gets the content of each tag
String title = c.getString(TAG_TITLE);
String content = c.getString(TAG_MESSAGE);
String username = c.getString(TAG_USERNAME);
File sdCard = Environment.getExternalStorageDirectory();
String profile_picture = c.getString(loadImageFromWebOperations(TAG_PROFILE_PICTURE,sdCard.getAbsolutePath() + "/dir1/dir2"));
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
map.put(TAG_TITLE, title);
map.put(TAG_MESSAGE, content);
map.put(TAG_USERNAME, username);
map.put(TAG_PROFILE_PICTURE, profile_picture);
// adding HashList to ArrayList
mCommentList.add(map);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
@SuppressWarnings("resource")
public static String loadImageFromWebOperations(String url, String path) {
try {
InputStream is = (InputStream) new URL(url).getContent();
System.out.println(path);
File f = new File(path);
f.createNewFile();
FileOutputStream fos = new FileOutputStream(f);
try {
byte[] b = new byte[100];
int l = 0;
while ((l = is.read(b)) != -1)
fos.write(b, 0, l);
} catch (Exception e) {
}
return f.getAbsolutePath();
} catch (Exception e) {
System.out.println("Exc=" + e);
return null;
}
}
Logcat如果不使用Bitmap / File解码方法有帮助：
09-07 20:43:08.877: I/Adreno-EGL(1497): <qeglDrvAPI_eglInitialize:381>: EGL 1.4 QUALCOMM build: AU_LINUX_ANDROID_KK_2.7_RB1.04.04.00.007.018_msm8960_KK_2.7_RB1_CL3869936_release_AU (CL3869936)
09-07 20:43:08.877: I/Adreno-EGL(1497): OpenGL ES Shader Compiler Version: 17.01.10.SPL
09-07 20:43:10.558: W/System.err(1497): at com.rynovation.kline.mainViewController.updateJSONdata(mainViewController.java:126)
09-07 20:43:10.558: W/System.err(1497): at com.rynovation.kline.mainViewController$LoadComments.doInBackground(mainViewController.java:225)
09-07 20:43:10.558: W/System.err(1497): at com.rynovation.kline.mainViewController$LoadComments.doInBackground(mainViewController.java:1)
09-07 20:44:12.034: I/Adreno-EGL(2592): <qeglDrvAPI_eglInitialize:381>: EGL 1.4 QUALCOMM build: AU_LINUX_ANDROID_KK_2.7_RB1.04.04.00.007.018_msm8960_KK_2.7_RB1_CL3869936_release_AU (CL3869936)
09-07 20:44:12.034: I/Adreno-EGL(2592): OpenGL ES Shader Compiler Version: 17.01.10.SPL
09-07 20:44:13.355: E/BitmapFactory(2592): Unable to decode stream: java.io.FileNotFoundException: /https:/shipstudent.com/complaint_desk/appphotos/owl.jpeg: open failed: ENOENT (No such file or directory)
09-07 20:44:13.355: I/System.out(2592): resolveUri failed on bad bitmap uri: https://shipstudent.com/complaint_desk/appphotos/owl.jpeg
09-07 20:44:13.425: E/BitmapFactory(2592): Unable to decode stream: java.io.FileNotFoundException: /https:/shipstudent.com/complaint_desk/appphotos/owl.jpeg: open failed: ENOENT (No such file or directory)
09-07 20:44:13.425: I/System.out(2592): resolveUri failed on bad bitmap uri: https://shipstudent.com/complaint_desk/appphotos/owl.jpeg
09-07 20:44:13.445: E/BitmapFactory(2592): Unable to decode stream: java.io.FileNotFoundException: /https:/shipstudent.com/animal/appphotos/978321177.jpg: open failed: ENOENT (No such file or directory)
09-07 20:44:13.445: I/System.out(2592): resolveUri failed on bad bitmap uri: https://shipstudent.com/animal/appphotos/978321177.jpg
09-07 20:44:13.455: E/BitmapFactory(2592): Unable to decode stream: java.io.FileNotFoundException: /https:/shipstudent.com/animal/appphotos/978321177.jpg: open failed: ENOENT (No such file or directory)
09-07 20:44:13.455: I/System.out(2592): resolveUri failed on bad bitmap uri: https://shipstudent.com/animal/appphotos/978321177.jpg
09-07 20:44:13.475: E/BitmapFactory(2592): Unable to decode stream: java.io.FileNotFoundException: /https:/shipstudent.com/animal/appphotos/978321177.jpg: open failed: ENOENT (No such file or directory)
09-07 20:44:13.475: I/System.out(2592): resolveUri failed on bad bitmap uri: https://shipstudent.com/animal/appphotos/978321177.jpg
如果我尝试以上内容：
String profile_picture = c.getString(loadImageFromWebOperations(TAG_PROFILE_PICTURE.substring(0),sdCard.getAbsolutePath() + "/dir1/dir2"));
我找到了一个未找到协议的logcat：
09-07 21:52:42.585: I/System.out(18987): Exc=java.net.MalformedURLException: Protocol not found: profile_picture
09-07 21:52:42.585: W/System.err(18987): org.json.JSONException: No value for null
09-07 21:52:42.595: W/System.err(18987): at org.json.JSONObject.get(JSONObject.java:355)
09-07 21:52:42.595: W/System.err(18987): at org.json.JSONObject.getString(JSONObject.java:515)
09-07 21:52:42.595: W/System.err(18987): at com.rynovation.kline.mainViewController.updateJSONdata(mainViewController.java:126)
09-07 21:52:42.595: W/System.err(18987): at com.rynovation.kline.mainViewController$LoadComments.doInBackground(mainViewController.java:228)
09-07 21:52:42.595: W/System.err(18987): at com.rynovation.kline.mainViewController$LoadComments.doInBackground(mainViewController.java:1)
09-07 21:52:42.595: W/System.err(18987): at android.os.AsyncTask$2.call(AsyncTask.java:288)
09-07 21:52:42.595: W/System.err(18987): at java.util.concurrent.FutureTask.run(FutureTask.java:237)
09-07 21:52:42.595: W/System.err(18987): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
09-07 21:52:42.595: W/System.err(18987): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
09-07 21:52:42.595: W/System.err(18987): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
09-07 21:52:42.595: W/System.err(18987): at java.lang.Thread.run(Thread.java:841)
答案 0 :(得分：0)
我有简单的ImageLoader.class你可以尝试
public class ImageLoader {
public static final String TAG = ImageLoader.class.getSimpleName();
private ImageLoaderEngine engine;
public void displayImage(String uri, ImageAware imageAware, DisplayImageOptions options,
ImageLoadingListener listener) {
checkConfiguration();
if (imageAware == null) {
throw new IllegalArgumentException(ERROR_WRONG_ARGUMENTS);
}
if (listener == null) {
listener = emptyListener;
}
if (options == null) {
options = configuration.defaultDisplayImageOptions;
}
if (TextUtils.isEmpty(uri)) {
engine.cancelDisplayTaskFor(imageAware);
listener.onLoadingStarted(uri, imageAware.getWrappedView());
if (options.shouldShowImageForEmptyUri()) {
imageAware.setImageDrawable(options.getImageForEmptyUri(configuration.resources));
} else {
imageAware.setImageDrawable(null);
}
listener.onLoadingComplete(uri, imageAware.getWrappedView(), null);
return;
}
ImageSize targetSize = ImageSizeUtils.defineTargetSizeForView(imageAware, configuration.getMaxImageSize());
String memoryCacheKey = MemoryCacheUtil.generateKey(uri, targetSize);
engine.prepareDisplayTaskFor(imageAware, memoryCacheKey);
listener.onLoadingStarted(uri, imageAware.getWrappedView());
Bitmap bmp = configuration.memoryCache.get(memoryCacheKey);
if (bmp != null && !bmp.isRecycled()) {
if (configuration.writeLogs) L.d(LOG_LOAD_IMAGE_FROM_MEMORY_CACHE, memoryCacheKey);
if (options.shouldPostProcess()) {
ImageLoadingInfo imageLoadingInfo = new ImageLoadingInfo(uri, imageAware, targetSize, memoryCacheKey, options, listener, engine
.getLockForUri(uri));
ProcessAndDisplayImageTask displayTask = new ProcessAndDisplayImageTask(engine, bmp, imageLoadingInfo, options
.getHandler());
if (options.isSyncLoading()) {
displayTask.run();
} else {
engine.submit(displayTask);
}
} else {
bmp = options.getDisplayer().display(bmp, imageAware, LoadedFrom.MEMORY_CACHE);
listener.onLoadingComplete(uri, imageAware.getWrappedView(), bmp);
}
} else {
if (options.shouldShowImageOnLoading()) {
imageAware.setImageDrawable(options.getImageOnLoading(configuration.resources));
} else if (options.isResetViewBeforeLoading()) {
imageAware.setImageDrawable(null);
}
ImageLoadingInfo imageLoadingInfo = new ImageLoadingInfo(uri, imageAware, targetSize, memoryCacheKey, options, listener, engine
.getLockForUri(uri));
LoadAndDisplayImageTask displayTask = new LoadAndDisplayImageTask(engine, imageLoadingInfo, options
.getHandler());
if (options.isSyncLoading()) {
displayTask.run();
} else {
engine.submit(displayTask);
}
}
}
public void displayImage(String uri, ImageView imageView) {
displayImage(uri, new ImageViewAware(imageView), null, null);
}
}
//
public static ImageSize defineTargetSizeForView(ImageAware imageAware, ImageSize maxImageSize) {
int width = imageAware.getWidth();
if (width <= 0) width = maxImageSize.getWidth();
int height = imageAware.getHeight();
if (height <= 0) height = maxImageSize.getHeight();
return new ImageSize(width, height);
}
在getView
上的适配器类列表视图中调用此meithod ImageLoader.getInstance().displayImage(mData.get(position).getImage0(), holder.photo);