正在 android 中的 URL 将位图加载到 ImageView
Loading Bitmap to ImageView from URL in android
我正在使用以下方法从 url 检索位图并将其传递给图像视图,但图像视图未更新。
public static Bitmap LoadImageFromWebOperations(String url) {
Bitmap bitmap;
try {
InputStream is = new URL(url).openStream();
bitmap = BitmapFactory.decodeStream(is);
return bitmap;
} catch (Exception e) {
return null;
}
呼叫 -
mov1_poster.setImageBitmap(VPmovies.LoadImageFromWebOperations(mov_details[0][7]));
//doesn't work
Toast.makeText(this,"url is \n"+mov_details[0][7],Toast.LENGTH_LONG).show();
// shows the url of the image successfully (just to check the url is not null)
我做错了什么吗?请帮忙。
public class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {
private ImageView imageView;
private Bitmap image;
public DownloadImageTask(ImageView imageView) {
this.imageView = imageView;
}
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);
}
}
}
现在调用你的代码:
new DownloadImageTask(YOUR_IMAGE_VIEW).execute("YOUR_URL");
在处理图像时使用 the picasso library,它的效果非常好,而且非常简单!
Picasso.with(context).load("http://i.imgur.com/DvpvklR.png").into(imageView);
我正在使用以下方法从 url 检索位图并将其传递给图像视图,但图像视图未更新。
public static Bitmap LoadImageFromWebOperations(String url) {
Bitmap bitmap;
try {
InputStream is = new URL(url).openStream();
bitmap = BitmapFactory.decodeStream(is);
return bitmap;
} catch (Exception e) {
return null;
}
呼叫 -
mov1_poster.setImageBitmap(VPmovies.LoadImageFromWebOperations(mov_details[0][7]));
//doesn't work
Toast.makeText(this,"url is \n"+mov_details[0][7],Toast.LENGTH_LONG).show();
// shows the url of the image successfully (just to check the url is not null)
我做错了什么吗?请帮忙。
public class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {
private ImageView imageView;
private Bitmap image;
public DownloadImageTask(ImageView imageView) {
this.imageView = imageView;
}
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);
}
}
}
现在调用你的代码:
new DownloadImageTask(YOUR_IMAGE_VIEW).execute("YOUR_URL");
在处理图像时使用 the picasso library,它的效果非常好,而且非常简单!
Picasso.with(context).load("http://i.imgur.com/DvpvklR.png").into(imageView);