Question

我正在尝试在单击列表项时显示进度对话框，但进度对话框从不显示。

令人惊讶的是，mProgressdialog.isShowing（）是真的。如果任何人遇到类似的问题，请提供一些问题的见解。

adapter.setOnItemClickListener(new Adapter.ListClickListener() {
                        @Override
                        public void onItemClick(int position, View v) {



                                    //Some computations done.

                                    if (ProjectsFragment.this.getActivity() != null) {

                                        UniversalProgressDialog.showSimpleProgressDialog(getActivity(),"Loading","Loading...",false);

          android.support.v4.app.FragmentManager fragmentManager = ProjectsFragment.this.getActivity().getSupportFragmentManager();
                    android.support.v4.app.FragmentTransaction ft = fragmentManager.beginTransaction();
                    ft.replace(R.id.sample_content_fragment, new AgendaFragment(), "AGENDA");
                    ft.commit();



                                    }
                                }
                            }
                        }
                        });

UniversalProgressDialog的源代码： -

    public class UniversalProgressDialog {

        private static ProgressDialog mProgressDialog;


        public static void showSimpleProgressDialog(Context context, String title,
                                                    String msg, boolean isCancelable) {
            try {
                if (mProgressDialog == null) {
                    mProgressDialog = ProgressDialog.show(context, title, msg);
                    mProgressDialog.setCancelable(false);
                    mProgressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
                    mProgressDialog.setIndeterminate(true);
                    mProgressDialog.setCanceledOnTouchOutside(false);
                }

                if(mProgressDialog.isShowing()){
                    mProgressDialog.dismiss();
                }

                if (!mProgressDialog.isShowing()) {
                    mProgressDialog.show();
                }

            } catch (IllegalArgumentException ie) {
                ie.printStackTrace();
            } catch (RuntimeException re) {
                re.printStackTrace();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        public static void removeSimpleProgressDialog() {
            try {
                if (mProgressDialog != null) {
                    if (mProgressDialog.isShowing()) {
                        mProgressDialog.dismiss();
                        mProgressDialog = null;
                    }
                }
            } catch (IllegalArgumentException ie) {
                ie.printStackTrace();

            } catch (RuntimeException re) {
                re.printStackTrace();
            } catch (Exception e) {
                e.printStackTrace();
            }

        }


    }

我尝试了什么？

尝试将显示代码的进度对话框移动到

尝试将片段转换代码移动到另一个线程，如下所示： -

 private class PerformFragmentTransition extends Thread {


        public PerformFragmentTransition() {
        }

        @Override
        public void run() {

            android.support.v4.app.FragmentManager fragmentManager = ProjectsFragment.this.getActivity().getSupportFragmentManager();
            android.support.v4.app.FragmentTransaction ft = fragmentManager.beginTransaction();
            ft.replace(R.id.sample_content_fragment, new AgendaFragment(), "AGENDA");
            ft.commit();
        }
    }

也尝试过： -

getActivity().runOnUiThread(new Runnable(){
                                public void run() {
                                    UniversalProgressDialog.showSimpleProgressDialog(getActivity(),"Loading","Loading...",false);

                                }
                            });

也尝试过： -

根据其中一个提交，我注释掉了片段转换代码并显示了进度对话框。

如果可以提供一些如何解决问题的线索，以及更多信息： - 我将在加载后删除下一个片段中的进度对话框。

Answer 1

mProgressDialog = ProgressDialog.show(context, title, msg);

使用以下代码替换上面的代码：

 mProgressDialog = new ProgressDialog(context);
        mProgressDialog.setTitle(title);
        mProgressDialog.setMessage(msg);

问题是您在代码中创建对话框时显示对话框在为其设置所需属性之前。并请删除try catch块，这样你就会得到错误实际发生的错误。并且可以在控制台中看到

进度对话框从不显示

1 个答案: