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我试图用齐射做网络请求时显示进度指示器。我收到错误“只有创建视图层次结构的原始线程才能触及其视图”。我无法弄清楚如何让我的hideProgressDialog()与showProgressDialog()相同的线程。这里是我的代码...显示不确定进度指示器
showProgressDialog("Logging you in");
String url = ApplicationController.getInstance().getBaseURL() + "Customer/LoginCustomer";
JsonRequest<String> jr = new JsonRequest<String>(Method.POST, url, jo.toString(), this.createSuccessListener(),
this.createErrorListener()) {
@Override
protected Response<String> parseNetworkResponse(NetworkResponse nr) {
hideProgressDialog();
try {
String str = new String(nr.data, "UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return null;
}
};
ApplicationController.getInstance().addToRequestQueue(jr);
}
/** Create Volley Listeners **/
private Response.ErrorListener createErrorListener() {
return new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
hideProgressDialog();
}
};
}
private Response.Listener<String> createSuccessListener() {
return new Response.Listener<String>() {
@Override
public void onResponse(String response) {
hideProgressDialog();}
};
}
解决方案
感谢tautvydas。我最终把这些方法放在我的基类中。
protected void showProgressDialog(String message) {
if(mHandler == null){
mHandler = new Handler();
}
if (mDialog == null || !mDialog.isShowing()) {
mDialog = new ProgressDialog(getActivity());
mDialog.setMessage(message);
mDialog.setCancelable(false);
mDialog.setIndeterminate(true);
mDialog.show();
}
}
protected void hideProgressDialog() {
if (mDialog != null) {
mHandler.post(new Runnable() {
@Override
// this will run on the main thread.
public void run() {
mDialog.hide();
}
});
}
}
参考这个职位各种方式对UI线程上运行: http://stackoverflow.com/questions/12850143/android-basics-running-code-在最UI线程 – Prakash