将输入流转换为位图

android multithreading java inputstream android-3.0-honeycomb

2022-09-01 00:32:45

我在将输入流从 Web 转换为位图时遇到问题。仅当输入图像类型.BMP（位图）时，才会出现问题。在这种情况下：bitmapFactory.decodeStream 返回 null。

任何提示如何解决此问题或我应该在哪里继续调试？

平台：安卓（蜂窝）

URLConnection conn = url.openConnection();
conn.connect();

inputStream = conn.getInputStream();

bufferedInputStream = new BufferedInputStream(inputStream);

bmp = BitmapFactory.decodeStream(bufferedInputStream);

答案 1

感谢您@Amir指出日志。发现一条线：

decoder->decode returned false

这似乎是一个常见的问题。做一个搜索，我找到了一个解决方案。

我以前的代码：

URLConnection conn = url.openConnection();
conn.connect();

inputStream = conn.getInputStream();

bufferedInputStream = new BufferedInputStream(inputStream);

bmp = BitmapFactory.decodeStream(bufferedInputStream);

正在运行的代码：

HttpGet httpRequest = null;

try {
    httpRequest = new HttpGet(url.toURI());
} catch (URISyntaxException e) {
    e.printStackTrace();
}

HttpClient httpclient = new DefaultHttpClient();

HttpResponse response = (HttpResponse) httpclient.execute(httpRequest);

HttpEntity entity = response.getEntity();

BufferedHttpEntity bufHttpEntity = new BufferedHttpEntity(entity);

InputStream instream = bufHttpEntity.getContent();

bmp = BitmapFactory.decodeStream(instream);

源

答案 2

这是一行答案

val bitmap = BitmapFactory.decodeStream(inputStream)

返回Bitmap