我正在使用一个代码来检索并显示Changelog,如果它是第一次启动,那么简单:)。
这在Android 2.3及更低版本上运行良好,但在尝试自定义ICS-ROM和模拟器时,它会失败......
if(lastVersion < currentVersion) {
InputStream content = null;
try {
HttpGet httpGet = new HttpGet("http://dreamhawk.blinkenshell.org/changelog.txt");
httpGet.setHeader("Content-Type", "text/plain; charset=utf-8");
HttpClient httpclient = new DefaultHttpClient();
// Execute HTTP Get Request
HttpResponse response = httpclient.execute(httpGet);
content = response.getEntity().getContent();
} catch (Exception e) {
//handle the exception !
}
if(content == null) {
lastVersion = Prefs.getInt("firstRun", -1);
Toast.makeText(Main.this,
"Failed fetching changelog on first run, connected to Internet?",
Toast.LENGTH_SHORT).show();
} else {
BufferedReader r = new BufferedReader(new InputStreamReader(content));
StringBuilder total = new StringBuilder();
String line;
String NL = System.getProperty("line.separator");
try {
while ((line = r.readLine()) != null) {
total.append(line + NL);
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String page = total.toString();
Dialog dialog = new Dialog(Main.this);
dialog.setContentView(R.layout.custom_dialog);
dialog.setTitle(R.string.changelog);
dialog.setCanceledOnTouchOutside(true);
TextView text = (TextView) dialog.findViewById(R.id.text);
text.setTextSize(13);
text.setText(page);
dialog.show();
}
}
显然,内容是空的,我不知道为什么..因为它正在其他Android版本上工作,我不知道什么可能是错的...但是作为我的菜鸟,我是可能使用了一些不好的代码...
关心帮忙? :)
答案 0 :(得分:0)
尝试检查输入流的数据可用性,而不是!= null
。
见答案:https://stackoverflow.com/a/1524309/222474
答案 1 :(得分:0)
如果问题可能与this有关,请考虑? 您无法在蜂窝(3.0)和转发主线程上执行网络操作。