我试图将从web下载的图像存储到内部存储中。我参考以下解决方案android - storing image cache in internal memory and reusing it
但我仍然是例外:
07-19 12:05:47.729: E/AndroidRuntime(341): java.lang.IllegalArgumentException: File /data/data/com.yellow.activity/files/-1717792749 contains a path separator
如何从文件路径加载图像: 这是我的代码。 图片是网址的广告。
File fileWithinMyDir = getApplicationContext().getFilesDir();
for(int i=0; i<image.size();i++){
String filename = String.valueOf(image.get(i).hashCode());
String urlString = image.get(i);
String PATH = fileWithinMyDir.getAbsolutePath() + "/" +filename;
infoLog(PATH);
DownloadFromUrl(PATH, urlString);
img_path.add(PATH);
}
private void DownloadFromUrl(String fileName, String urlStr)
{
try
{
URL url = new URL(urlStr);
File file = new File(fileName);
URLConnection ucon = url.openConnection();
InputStream is = ucon.getInputStream();
BufferedInputStream bis = new BufferedInputStream(is);
ByteArrayBuffer baf = new ByteArrayBuffer(50);
int current = 0;
while ((current = bis.read()) != -1)
{
baf.append((byte) current);
}
FileOutputStream fos = new FileOutputStream(file,true);
fos.write(baf.toByteArray());
fos.close();
infoLog("going ryt....");
}
catch (IOException e)
{
infoLog("download "+ e.getMessage());
}
}
如何将图片加载到imageView?我试过了。
File filePath = getFileStreamPath(img_path.get(i));
imageView.setImageDrawable(Drawable.createFromPath(filePath.toString()));
但它不起作用。
答案 0 :(得分:1)
保存到内部存储器......
File fileWithinMyDir = getApplicationContext().getFilesDir();
try
{
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
.permitAll().build();
StrictMode.setThreadPolicy(policy);
URL url = new URL("http://t2.gstatic.com /images?q=tbn:ANd9GcQjZgUffqqe2mKKb5VOrDNd-ZxD7sJOU7WAHlFAy6PLbtXpyQZYdw");
File file = new File( fileWithinMyDir.getAbsolutePath() + "/" +"sun.jpg");
URLConnection ucon = url.openConnection();
InputStream is = ucon.getInputStream();
BufferedInputStream bis = new BufferedInputStream(is);
ByteArrayBuffer baf = new ByteArrayBuffer(50);
int current = 0;
while ((current = bis.read()) != -1)
{
baf.append((byte) current);
}
FileOutputStream fos = new FileOutputStream(file);
fos.write(baf.toByteArray());
fos.close();
}
catch (IOException e)
{
Log.e("download", e.getMessage());
}
从内存中加载图像..
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
.permitAll().build();
StrictMode.setThreadPolicy(policy);
mImgView1 = (ImageView) findViewById(R.id.mImgView1);
Bitmap bitmap = BitmapFactory.decodeFile(fileWithinMyDir.getAbsolutePath() + "/" +"sunn"+".file extension");
mImgView1.setImageBitmap(bitmap);
这适用于较新的Android,因为&#34; android.os.networkonmainthreadexception&#34;
如果你想解决问题,你也可以使用AsyncTask ...答案 1 :(得分:0)
试试这种方式
String PATH = fileWithinMyDir.getAbsolutePath() + filename;
答案 2 :(得分:0)
我解决了。 替换以下代码
File filePath = getFileStreamPath(img_path.get(i));
imageView.setImageDrawable(Drawable.createFromPath(filePath.toString()));
与
imageView.setImageDrawable(Drawable.createFromPath(img_path.get(i)));