图片浏览问题 [英] Image View problem
本文介绍了图片浏览问题的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
ImageView img;
TextView tv;
Parser p= new Parser();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tv = (TextView) findViewById(R.id.txt);
img = (ImageView) findViewById(R.id.cover);
new AsyncTask<Void, Double, Void>() {
@Override
protected Void doInBackground(Void... params) {
while (true) {
publishProgress(Math.random());
SystemClock.sleep(3000);
}
}
@Override
protected void onProgressUpdate(Double... values) {
p.myHandler();
img.setImageBitmap(p.bitmap);
tv.setText("Artist : " + p.artist + "\n" +
"Album : " + p.album + "\n" +
"Song : " + p.title + "\n");
}
}.execute();
}
和也
p.bitmap = BitmapFactory.decodeStream((InputStream)new URL(image).getContent());
但图像并不总是显示。图像出现和消失随机你能帮助我吗?
but the image doesn't always show. The image appears and disappears randomly can you help me please?
推荐答案
据的此链接,没有在 BitmapFactory.de codeStream
的错误。它的存在,至少在Android 2.1的SDK。
According to this link, there is a bug in the previous versions of BitmapFactory.decodeStream
. It exists at least at the Android 2.1 SDK.
本类解决了这个问题:
class FlushedInputStream extends FilterInputStream {
public FlushedInputStream(InputStream inputStream) {
super(inputStream);
}
@Override
public long skip(long n) throws IOException {
long totalBytesSkipped = 0L;
while (totalBytesSkipped < n) {
long bytesSkipped = in.skip(n - totalBytesSkipped);
if (bytesSkipped == 0L) {
int ibyte = read();
if (ibyte < 0) {
break; // we reached EOF
} else {
bytesSkipped = 1; // we read one byte
}
}
totalBytesSkipped += bytesSkipped;
}
return totalBytesSkipped;
}
}
和图像应如此下载:
//I'm not sure whether this line works, but just in case I use another approach
//InputStream is = (InputStream)new URL(image).getContent()
DefaultHttpClient client = new DefaultHttpClient();
HttpGet request = new HttpGet(imageUrl);
HttpResponse response = client.execute(request);
InputStream is = response.getEntity().getContent();
//Use another stream
FlushedInputStream fis = new FlushedInputStream(is);
bmp = BitmapFactory.decodeStream(fis);
这篇关于图片浏览问题的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
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