我想解析一个网页并将progressdialog样式水平视觉化并逐字递增,这是可能的吗?
解决方法
尝试这样的事情,
创建ProgressDialog.
ProgressDialog mProgressDialog = new ProgressDialog(Your_Activity.this); mProgressDialog.setMessage("Here you can set a message"); mProgressDialog.setIndeterminate(false); mProgressDialog.setMax(100); mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); mProgressDialog.show(); MyAsyncTask obj = new MyAsyncTask (); obj.execute("url");
你的AsyncTask类.
private class MyAsyncTask extends AsyncTask<String,Integer,String>{ @Override protected String doInBackground(String... url) { int count; try { URL url = new URL(url[0]); URLConnection connection = url.openConnection(); connection.connect(); // this will be useful so that you can show a tipical 0-100% progress bar int length = connection.getContentLength(); // downlod the file InputStream input = new BufferedInputStream(url.openStream()); OutputStream output = new FileOutputStream("/sdcard/file_name.txt"); byte data[] = new byte[1024]; long total = 0; while ((count = input.read(data)) != -1) { total += count; // publishing the progress.... publishProgress((int)(total*100/length)); output.write(data,count); } output.flush(); output.close(); input.close(); } catch (Exception e) {} return null; } @Override public void onProgressUpdate(String... args){ mProgressDialog.setProgress(args[0]); } } }
您必须在AndroidManifest文件中提供这些权限.
<uses-permission android:name="android.permission.INTERNET"></uses-permission> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
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