我正在动态创建ImageViews并显示它。但是我在滚动时遇到了重新加载问题,因此我决定使用NetworkImageView,但是在这里我无法设置位图。它没有显示任何错误,但没有显示任何图像。在我的代码下方...
final NetworkImageView imageView = new NetworkImageView(context);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(150,
200);
params.weight = 1;
//imageView.setImageBitmap(null);
imageView.setLayoutParams(params);
imageView.setMaxHeight(200);
imageView.setMaxWidth(150);
// bitmap =//
// BitmapFactory.decodeResource(context.getResources(),R.drawable.ic_menu_folder);
// Log.i("Bitmaps Counts", String.valueOf(pos));
/* comment all this...
new Thread() {
public void run() {
bitmap = downloadImage(tempValues.getItemAbsolutePath());
((Activity) context).runOnUiThread(new Runnable() {
@Override
public void run() {
imageView.setImageBitmap(bitmap);
}
});
}
}.start();*/
RequestQueue requestQueue = Volley.newRequestQueue(getApplicationContext());
ImageLoader mImageLoader = new ImageLoader(requestQueue,new LruBitmapCache(1000000));
mImageLoader.get(tempValues.getItemAbsolutePath(),
ImageLoader.getImageListener(imageView,
R.android.defaultimg,
R.android.errorimg));
layout.addView(imageView);
下载图像代码..
/* unused method
private Bitmap downloadImage(String url) {
Bitmap bitmap = null;
InputStream stream = null;
BitmapFactory.Options bmOptions = new BitmapFactory.Options();
bmOptions.inSampleSize = 1;
try {
stream = getHttpConnection(url);
bitmap = BitmapFactory.decodeStream(stream, null, bmOptions);
stream.close();
} catch (IOException e1) {
e1.printStackTrace();
}
return bitmap;
}
private InputStream getHttpConnection(String urlString) throws IOException {
InputStream stream = null;
URL url = new URL(urlString);
URLConnection connection = url.openConnection();
try {
HttpURLConnection httpConnection = (HttpURLConnection) connection;
httpConnection.setRequestMethod("GET");
httpConnection.connect();
if (httpConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {
stream = httpConnection.getInputStream();
}
} catch (Exception ex) {
ex.printStackTrace();
}
return stream;
}*/
errorlog
05-12 19:11:13.971:e/androidruntime(11177):致命例外:线程-732505-12 19:11:13.971:e/androidruntime(11177):过程:com.dar.app,pid:1117705-12 19:11:13.971:e/androidruntime(11177):java.lang.negativearraysizeexception:-35005-12 19:11:13.971:e/androidruntime(11177):在com.android.volley.toolbox.diskbasedcache.streamtobytes(diskbasedcache.java:316)05-12 19:11:13.971:e/androidruntime(11177):在com.android.volley.toolbox.diskbasedcache.get(diskbasedcache.java:117)05-12 19:11:13.971:e/androidruntime(11177):在com.android.volley.cachedispatcher.run(cachedispatcher.java.java:100)
您可以使用凌空图像下行
很容易默认IMG设置了... iage的加载程序请求。如果使用URL找到图像,它将设置..或如果错误将设置错误映像。
RequestQueue requestQueue = Volley.newRequestQueue(getApplicationContext());
ImageLoader mImageLoader = new ImageLoader(requestQueue,new LruBitmapCache(1000000));
mImageLoader.get(<img-url>,
ImageLoader.getImageListener(<imageview-object>,
R.drawable.defaultimg,
R.drawable.errorimg));
最终代码
public class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {
private ImageView imageView;
private Bitmap image;
private LinearLayout linear;
public DownloadImageTask(ImageView imageView, LinearLayout linear) {
this.imageView = imageView;
this.linear = linear;
}
protected Bitmap doInBackground(String... urls) {
String urldisplay = urls[0];
try {
InputStream in = new java.net.URL(urldisplay).openStream();
image = BitmapFactory.decodeStream(in);
} catch (Exception e) {
image = null;
}
return image;
}
@SuppressLint("NewApi")
protected void onPostExecute(Bitmap result) {
if (result != null) {
imageView.setImageBitmap(result);
linear.addView(imageView);
}
}
}
现在打电话给您的代码:
final ImageView imageView = new ImageView(context);
final LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(150, 200);
params.weight = 1;
imageView.setLayoutParams(params);
imageView.setMaxHeight(200);
imageView.setMaxWidth(150);
new DownloadImageTask(imageView, layout).execute(tempValues.getItemAbsolutePath());