我使用的是OkHttp,一切都很好,但是,我想考虑DNS解析关闭、服务器关闭、速度慢或只是返回HTTP状态代码200以外的东西的情况。我试过使用Toast,但我做不到,因为这是在另一个线程上完成的(?)。我如何克服这个障碍,给用户更好的体验?这是我的代码:
private void getBinary(String text) throws Exception {
OkHttpClient client = new OkHttpClient();
String body = URLEncoder.encode(text, "utf-8");
// Encrypt
MCrypt mcrypt = new MCrypt();
String encrypted = MCrypt.bytesToHex(mcrypt.encrypt(body));
Request request = new Request.Builder()
.url("http://mysite/my_api.php")
.post(RequestBody.create(MediaType.parse("text/plain"), encrypted))
.addHeader("User-Agent", System.getProperty("http.agent"))
.build();
client.newCall(request).enqueue(new Callback() {
@Override
public void onResponse(Response response) throws IOException, RuntimeException {
if (response.code() != 200){
Toast.makeText(getSherlockActivity(), "Fail", Toast.LENGTH_LONG).show();
return;
}
saveResponseToFile(response);
}
@Override
public void onFailure(Request arg0, IOException arg1) {
Toast.makeText(getSherlockActivity(), "Bigger fail", Toast.LENGTH_LONG).show();
}
});
}
以下是崩溃:
FATAL EXCEPTION: OkHttp Dispatcher
java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
Toast必须显示在主线程上。您可以使用new Handler(Looper.getMainLooper())
从任何后台线程生成一个主线程处理程序,然后使用它将toast工作发布到主线程。
这样的代码将适用于您的:
public static void backgroundThreadShortToast(final Context context,
final String msg) {
if (context != null && msg != null) {
new Handler(Looper.getMainLooper()).post(new Runnable() {
@Override
public void run() {
Toast.makeText(context, msg, Toast.LENGTH_SHORT).show();
}
});
}
}