问题描述
在对话框片段上看不到自定义进度对话框
“自定义进度”对话框可在“活动”和“片段”中使用,但是当我们尝试在“对话片段”中显示自定义进度时,则不会显示加载器。
/**
* A simple {@link Fragment} subclass.
*/
public class CustomAlertDialogFragment extends Dialog {
/**
* Instantiates a new Custom alert dialog fragment.
*
* @param context the context
* @param text the text
*/
public CustomAlertDialogFragment(Context context,String text) {
super(context,android.R.style.Theme_Holo_Dialog_NoActionBar);
LayoutInflater inflater = (LayoutInflater)
context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
ProgressBar v = new ProgressBar(context);
requestwindowFeature(Window.FEATURE_NO_TITLE);
setContentView(v);
setCancelable(false);
getwindow().setBackgroundDrawableResource(android.R.color.transparent);
}
}
/**
* Loading bar.
*
* @param enable the enable
*/
public void loadingBar(boolean enable) {
if (enable) {
if (progressDialog == null) {
progressDialog = new CustomAlertDialogFragment(getActivity(),"");
}
if (!progressDialog.isShowing())
progressDialog.show();
} else {
dismissprogressBar();
}
}
/**
* dismiss progress bar.
*/
public void dismissprogressBar() {
if (progressDialog != null && progressDialog.isShowing()) {
progressDialog.dismiss();
}
我叫loader为
loadingBar(true);
File source = new File("/mnt/extSdCard/Audio");
File dest = new File("/mnt/UsbDriveA/Dokita");
copyDirectory(source,dest);
loadingBar(false);
解决方法
也许您正在线程中或使用AsyncTask运行长时间运行的任务(应在后台执行)
在您的应用中实现以下代码
Thread thread = new Thread() {
@Override
public void run() {
loadingBar(true);
File source = new File("/mnt/extSdCard/Audio"); // source of file
File dest = new File("/mnt/UsbDriveA/Dokita"); // destination of file
copyDirectory(source,dest);
loadingBar(false);
}
};
copyDirectory(source,dest);
thread.start();