[英]Loading image from URL in android
我正在嘗試從我從Volley JSONObjectRequest獲得的URL加載圖像。
這是我的JSON請求:
//creates the post request and posts
JsonObjectRequest getRandomImageURL = new JsonObjectRequest(Request.Method.POST, url_image,null,
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Log.d("ServerResponse","ATM ImageURL"+response.toString());
try {
String image = response.getString("Image");
Log.d("Image","ImageURL "+imgLink+image);
imgAd = (ImageView) findViewById(R.id.imgAd);
String imgURL = imgLink+image;
new DownloadImageTask(imgAd).execute(imgURL);
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
// error
Log.d("Error.Response","Error"+ error.getLocalizedMessage());
}
}
) {
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers = new HashMap<>();
headers.put("Content-type", "application/json");
headers.put("Accept", "application/json");
headers.put("User-Agent", "Mozilla/5.0");
headers.put("Content-length", dataStream.toString());
return headers;
}
@Override
public byte[] getBody() {
try {
return mRequestBody == null ? null : mRequestBody.getBytes("utf-8");
} catch (UnsupportedEncodingException uee) {
VolleyLog.wtf("Unsupported Encoding while trying to get the bytes of %s using %s", mRequestBody, "utf-8");
return null;
}
}
};
Volley.newRequestQueue(this).add(getRandomImageURL);
}
這就是我用來從URL加載圖像的內容:
private class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {
ImageView bmImage;
public DownloadImageTask(ImageView bmImage) {
this.bmImage = bmImage;
}
protected Bitmap doInBackground(String... urls) {
String urldisplay = urls[0];
Bitmap mIcon11 = null;
try {
InputStream in = new java.net.URL(urldisplay).openStream();
mIcon11 = BitmapFactory.decodeStream(in);
} catch (Exception e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return mIcon11;
}
protected void onPostExecute(Bitmap result) {
bmImage.setImageBitmap(result);
}
}
我繼續收到以下異常:
W/System.err: java.io.FileNotFoundException: https://www.lamdacardservices.com/offers/CINEMA Logo.jpg
W/System.err: at com.android.okhttp.internal.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:197)
W/System.err: at com.android.okhttp.internal.http.DelegatingHttpsURLConnection.getInputStream(DelegatingHttpsURLConnection.java:210)
W/System.err: at com.android.okhttp.internal.http.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:25)
W/System.err: at java.net.URL.openStream(URL.java:470)
W/System.err: at com.example.epavlos.lamda.map_activities.AtmMapActivity$DownloadImageTask$override.doInBackground(AtmMapActivity.java:327)
W/System.err: at com.example.epavlos.lamda.map_activities.AtmMapActivity$DownloadImageTask$override.access$dispatch(AtmMapActivity.java)
W/System.err: at com.example.epavlos.lamda.map_activities.AtmMapActivity$DownloadImageTask.doInBackground(AtmMapActivity.java:0)
W/System.err: at com.example.epavlos.lamda.map_activities.AtmMapActivity$DownloadImageTask.doInBackground(AtmMapActivity.java:317)
W/System.err: at android.os.AsyncTask$2.call(AsyncTask.java:288)
W/System.err: at java.util.concurrent.FutureTask.run(FutureTask.java:237)
W/System.err: at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
W/System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
W/System.err: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
W/System.err: at java.lang.Thread.run(Thread.java:818)
誰能幫我解決我做錯的事情? 或者,即使有更簡單的方法可以做到這一點,例如使用凌空抽球等?
嘗試這個:
String temp = "https://www.lamdacardservices.com/offers/CINEMA Logo.jpg";
temp = temp.replaceAll(" ", "%20");
URL sourceUrl = new URL(temp);
https://www.lamdacardservices.com/offers/CINEMA Logo.jpg
檢查您的URL,其中圖像名稱之間包含空格。嘗試使用URL編碼
https://www.lamdacardservices.com/offers/CINEMA%20Logo.jpg
嘗試使用此URL,讓我知道。
只需用%20
替換您的空間
您應該對將處理類似問題的URL進行編碼。 一種方法是
Uri.encode("https://www.lamdacardservices.com/offers/CINEMA Logo.jpg")
為此,使用Glide,最好的第三方庫之一
您也可以選擇使用ImageLoader作為功能強大的圖像加載和緩存工具。
Gradle依賴關系:
編譯'com.nostra13.universalimageloader:universal-image-loader:1.9.5'
使用方法:
ImageLoader imageLoader = ImageLoader.getInstance(); //獲取單例實例
imageLoader.displayImage(imageUri,imageView);
來源: https : //github.com/nostra13/Android-Universal-Image-Loader
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.