java课程之团队开发冲刺阶段2.8

　　昨日总结：

　　1.具体情况已经写在了昨天的当日总结当中

　　遇到的问题：

　　1.toolbar的返回键与菜单键冲突，导致无法同时使用

　　今天的任务：

　　1.完整实现课程查询任务

　　当日总结：

　　1.完整实现，唯一的遗憾就是课程信息不完全，导致只能查询个别信息

　　2.首先实现的是listview中的子组件

<?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"
    android:layout_marginLeft="@dimen/activity_horizontal_margin"
    android:layout_marginRight="@dimen/activity_horizontal_margin"
    android:paddingLeft="5dp"
    android:paddingRight="5dp">
    <!-- 类似于iOS开发中Cell的布局 -->
    <LinearLayout
        android:orientation="horizontal"
        android:gravity="center_vertical"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp">
        <TextView
            android:id="@+id/lesson_name"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:gravity="left"
            android:textSize="20dp"
            android:text="课程名称"
            android:textColor="#ff0000"
            android:lines="1"/>
        <TextView
            android:id="@+id/teacher_name"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:gravity="right"
            android:textSize="15dp"
            android:text="教师名称"
            android:lines="1"/>
    </LinearLayout>
    <LinearLayout
        android:orientation="horizontal"
        android:gravity="center_vertical"
        android:layout_width="match_parent"
        android:layout_height="25dp">
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:textSize="15dp"
            android:id="@+id/lesson_building"
            android:text="教学楼"
            android:lines="1"/>
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:lines="1"
            android:id="@+id/lesson_classroom"
            android:textSize="15dp"
            android:text="教室" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:lines="1"
            android:textSize="15dp"
            android:id="@+id/lesson_nature"
            android:text="课程性质"/>
    </LinearLayout>

    <LinearLayout
        android:orientation="horizontal"
        android:gravity="center_vertical"
        android:layout_width="match_parent"
        android:layout_height="35dp"
        android:layout_marginBottom="10dp">
        <TextView
            android:id="@+id/lesson_week"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:textSize="15dp"
            android:text="星期"
            android:lines="1"/>
        <TextView
            android:id="@+id/lesson_number"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:lines="1"
            android:textSize="15dp"
            android:text="节次" />

        <TextView
            android:id="@+id/lesson_sumweek"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:lines="1"
            android:textSize="15dp"
            android:text="周次"/>
    </LinearLayout>

</LinearLayout>

　　3，然后我们需要适配器

    public LessonAdapter(Context context, int resource, List<LessonBean> objects) {
        super(context, resource, objects);
        resourceId = resource;
    }

    @Override
    /**
     * @param position 当前设置的Cell行数，类似于iOS开发中的indexPath.row
     */
    public View getView(int position, View convertView, ViewGroup parent) {
        LessonBean lesson = getItem(position);

        View lessonView = LayoutInflater.from(getContext()).inflate(resourceId, null);

        TextView lesson_name = lessonView.findViewById(R.id.lesson_name);
        TextView teacher_name =  lessonView.findViewById(R.id.teacher_name);
        TextView lesson_building =  lessonView.findViewById(R.id.lesson_building);
        TextView lesson_classroom =  lessonView.findViewById(R.id.lesson_classroom);
        TextView lesson_nature =  lessonView.findViewById(R.id.lesson_nature);
        TextView lesson_week =  lessonView.findViewById(R.id.lesson_week);
        TextView lesson_number =  lessonView.findViewById(R.id.lesson_number);
        TextView lesson_sumweek =  lessonView.findViewById(R.id.lesson_sumweek);

        lesson_name.setText(lesson.getLesson_name());
        teacher_name.setText(lesson.getTeacher_name());
        lesson_building.setText(lesson.getLesson_building());
        lesson_classroom.setText(lesson.getLesson_classroom());
        lesson_nature.setText(lesson.getLesson_nature());
        lesson_week.setText(lesson.getLesson_week());
        lesson_number.setText(lesson.getLesson_number());
        lesson_sumweek.setText(lesson.getLesson_sumweek());

        return lessonView;
    }
}

4.当然，适配之前应该需要相应的Javabean，这个应该放在前面，顺序错了，就不改了

public class LessonBean {
    private String lesson_name;
    private String teacher_name;
    private String lesson_building;
    private String lesson_classroom;
    private String lesson_nature;
    private String lesson_week;
    private String lesson_number;
    private String lesson_sumweek;

    public LessonBean(String number1,String number2,String number3,String number4,String number5,String number6,String number7,String number8)
    {
        lesson_name=number1;
        teacher_name=number2;
        lesson_building=number3;
        lesson_classroom=number4;
        lesson_nature=number5;
        lesson_week=number6;
        lesson_number=number7;
        lesson_sumweek=number8;
    }


    public String getLesson_name() {
        return lesson_name;
    }

    public void setLesson_name(String lesson_name) {
        this.lesson_name = lesson_name;
    }

    public String getTeacher_name() {
        return teacher_name;
    }

    public void setTeacher_name(String teacher_name) {
        this.teacher_name = teacher_name;
    }

    public String getLesson_building() {
        return lesson_building;
    }

    public void setLesson_building(String lesson_building) {
        this.lesson_building = lesson_building;
    }

    public String getLesson_classroom() {
        return lesson_classroom;
    }

    public void setLesson_classroom(String lesson_classroom) {
        this.lesson_classroom = lesson_classroom;
    }

    public String getLesson_nature() {
        return lesson_nature;
    }

    public void setLesson_nature(String lesson_nature) {
        this.lesson_nature = lesson_nature;
    }

    public String getLesson_week() {
        return lesson_week;
    }

    public void setLesson_week(String lesson_week) {
        this.lesson_week = lesson_week;
    }

    public String getLesson_number() {
        return lesson_number;
    }

    public void setLesson_number(String lesson_number) {
        this.lesson_number = lesson_number;
    }

    public String getLesson_sumweek() {
        return lesson_sumweek;
    }

    public void setLesson_sumweek(String lesson_sumweek) {
        this.lesson_sumweek = lesson_sumweek;
    }
}

　　5.最后一步就是调用游标，读取数据然后添加到scrollview组件中的listview中

    public void test(String DB_PATH,String DB_NAME,String key)
    {
        // 下面测试 /data/data/com.test.db/databases/ 下的数据库是否能正常工作
        SQLiteDatabase database = SQLiteDatabase.openOrCreateDatabase(DB_PATH + DB_NAME, null);
        Cursor cursor=null;
        productList.clear();
        if(key.isEmpty())
        {
            cursor = database.rawQuery("select 课程,教师,教学楼,教室,性质,星期,节次,周次 from lesson_informatization ", null);
        }
        else
        {
            cursor = database.rawQuery("select 课程,教师,教学楼,教室,性质,星期,节次,周次 from lesson_informatization where 课程 like '%"+key+"%'", null);
        }

        ArrayList<LessonBean> list=new ArrayList<LessonBean>();
        if(cursor.moveToFirst())
        {
            do{
                String name=cursor.getString(cursor.getColumnIndex("课程"));
                String teacher=cursor.getString(cursor.getColumnIndex("教师"));
                String lesson_building=cursor.getString(cursor.getColumnIndex("教学楼"));
                String lesson_classroom=cursor.getString(cursor.getColumnIndex("教室"));
                String lesson_nature=cursor.getString(cursor.getColumnIndex("性质"));
                String lesson_week=cursor.getString(cursor.getColumnIndex("星期"));
                String lesson_number=cursor.getString(cursor.getColumnIndex("节次"));
                String lesson_sumweek=cursor.getString(cursor.getColumnIndex("周次"));
                productList.add(new LessonBean(name,teacher,lesson_building,lesson_classroom,lesson_nature,lesson_week,lesson_number,lesson_sumweek));
            }while (cursor.moveToNext());
        }
//        if (cursor.getCount() > 0) {
//            cursor.moveToFirst();
//            try {
//                // 解决中文乱码问题
//                byte test[] = cursor.getBlob(0);
//                String strtest = new String(test, "utf-8").trim();
//                // 看输出的信息是否正确
//                Log.d("是否能够查找到本地数据库的信息",strtest);
//                System.out.println(strtest);
//            } catch (UnsupportedEncodingException e) {
//                // TODO Auto-generated catch block
//                e.printStackTrace();
//            }
//        }
        cursor.close();
        if(productList.size()==0)
        {
            productList.add(new LessonBean("没有找到相关课程哦(ಥ_ಥ)","","","","","","",""));
        }
    }