Android下载二进制文件问题
Android下载二进制文件问题
提问于 2009-02-23 04:18:33
我在从互联网下载我的应用程序中的二进制文件(视频)时遇到了问题。在Quicktime中，如果我直接下载它，它可以正常工作，但通过我的应用程序，不知何故它会变得一团糟(即使它们在文本编辑器中看起来完全一样)。下面是一个示例：
URL u = new URL("http://www.path.to/a.mp4?video");
HttpURLConnection c = (HttpURLConnection) u.openConnection();
c.setRequestMethod("GET");
c.setDoOutput(true);
c.connect();
FileOutputStream f = new FileOutputStream(new File(root,"Video.mp4"));
InputStream in = c.getInputStream();
byte[] buffer = new byte[1024];
int len1 = 0;
while ( (len1 = in.read(buffer)) > 0 ) {
f.write(buffer);
}
f.close();回答 5
Stack Overflow用户
发布于 2011-05-12 23:04:30
new DefaultHttpClient().execute(new HttpGet("http://www.path.to/a.mp4?video"))
.getEntity().writeTo(
new FileOutputStream(new File(root,"Video.mp4")));Stack Overflow用户
发布于 2009-02-23 04:43:43
其中一个问题是您对缓冲区的读取。如果输入流的每次读取不是1024的精确倍数，那么您将复制坏数据。使用：
byte[] buffer = new byte[1024];
int len1 = 0;
while ( (len1 = in.read(buffer)) != -1 ) {
f.write(buffer,0, len1);
}Stack Overflow用户
发布于 2010-12-10 14:13:42
public class download extends Activity {
private static String fileName = "file.3gp";
private static final String MY_URL = "Your download url goes here";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
try {
URL url = new URL(MY_URL);
HttpURLConnection c = (HttpURLConnection) url.openConnection();
c.setRequestMethod("GET");
c.setDoOutput(true);
c.connect();
String PATH = Environment.getExternalStorageDirectory()
+ "/download/";
Log.d("Abhan", "PATH: " + PATH);
File file = new File(PATH);
if(!file.exists()) {
file.mkdirs();
}
File outputFile = new File(file, fileName);
FileOutputStream fos = new FileOutputStream(outputFile);
InputStream is = c.getInputStream();
byte[] buffer = new byte[1024];
int len1 = 0;
while ((len1 = is.read(buffer)) != -1) {
fos.write(buffer, 0, len1);
}
fos.flush();
fos.close();
is.close();
} catch (IOException e) {
Log.e("Abhan", "Error: " + e);
}
Log.i("Abhan", "Check Your File.");
}
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/576513
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