AlertDialog的用法

這是寫在activity裏的代碼

 private View choseChapter;

  addChapter.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                LayoutInflater inflater = (LayoutInflater) ChapterActivity.this.getSystemService(LAYOUT_INFLATER_SERVICE);
                choseChapter= inflater.inflate(R.layout.course_edittext, null);
                AlertDialog.Builder dialog=new AlertDialog.Builder(ChapterActivity.this);
                dialog.setTitle("請輸入要添加的章節名");
                dialog.setView(choseChapter);
                dialog.setPositiveButton("確定", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        EditText CourseNmae=(EditText)choseChapter.findViewById(R.id.c);
                        String Coursename=CourseNmae.getText().toString();
                        if(Coursename.isEmpty())
                        {
                            Toast.makeText(ChapterActivity.this, "請輸入章節號", Toast.LENGTH_SHORT).show();
                        }
                        else {
                            Course c = new Course();
                            c.setName(Coursename);
                            chapters.add(c);
                            adapter.referesh(chapters);
                        }
                    }
                });
                dialog.setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                    }
                });
                dialog.show();
            }
        });

這是course_edittext的代碼

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TableLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/tableLayout1">
        <TableRow
            android:id="@+id/tableRow1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:padding="10dip">
            <EditText
                android:layout_weight="1"
                android:hint="請輸入課程名"
                android:id="@+id/c"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                ></EditText>
        </TableRow>
    </TableLayout>
    </LinearLayout>