格式化一個簡單的光標適配器

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我正在開發一個android項目，允許學生使用他們的android設備添加/刪除課程。我在在顯示按天排序的ListView中安排一個麻煩。我不能得到正確的TextView課程列表以下是我迄今所做..格式化一個簡單的光標適配器

activity_list_item.xml 
<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:layout_margin="3dp" 
    android:background="@drawable/list_item" 
    android:orientation="vertical" > 

    <TextView 
     android:id="@+id/txDay" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center" 
     android:fontFamily="sans-serif-light" 
     android:padding="10dp" 
     android:text="@string/day" 
     android:textAppearance="?android:attr/textAppearanceLarge" 
     android:textColor="#E74C3C" 
     android:textSize="45sp" 
     android:textStyle="bold" /> 

    <TextView 
     android:id="@+id/tv8" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center" 
     android:text="@string/tv8" 
     android:textColor="#F9F1F8" /> 

    <TextView 
     android:id="@+id/tvCourseName1" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center" 
     android:text="@string/course" 
     android:textAppearance="?android:attr/textAppearanceMedium" /> 

    <TextView 
     android:id="@+id/tv9" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center" 
     android:layout_marginTop="5dp" 
     android:text="@string/tv9" 
     android:textColor="#F9F1F8" /> 

    <TextView 
     android:id="@+id/tvCourseName2" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center" 
     android:text="@string/course" 
     android:textAppearance="?android:attr/textAppearanceMedium" /> 

    <TextView 
     android:id="@+id/tv11" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center" 
     android:layout_marginTop="5dp" 
     android:text="@string/tv11" 
     android:textColor="#F9F1F8" /> 

    <TextView 
     android:id="@+id/tvCourseName3" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center" 
     android:text="@string/course" 
     android:textAppearance="?android:attr/textAppearanceMedium" /> 

    <TextView 
     android:id="@+id/tv12" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center" 
     android:layout_marginTop="5dp" 
     android:text="@string/tv12" 
     android:textColor="#F9F1F8" /> 

    <TextView 
     android:id="@+id/tvCourseName4" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center" 
     android:text="@string/course" 
     android:textAppearance="?android:attr/textAppearanceMedium" /> 

    <TextView 
     android:id="@+id/tv2" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center" 
     android:layout_marginTop="5dp" 
     android:text="@string/tv2" 
     android:textColor="#F9F1F8" /> 

    <TextView 
     android:id="@+id/tvCourseName5" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center" 
     android:text="@string/course" 
     android:textAppearance="?android:attr/textAppearanceMedium" /> 

    <TextView 
     android:id="@+id/tv3" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center" 
     android:layout_marginTop="5dp" 
     android:text="@string/tv3" 
     android:textColor="#F9F1F8" /> 

    <TextView 
     android:id="@+id/tvCourseName6" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center" 
     android:text="@string/course" 
     android:layout_marginBottom="5dp" 
     android:textAppearance="?android:attr/textAppearanceMedium" /> 

</LinearLayout> 

activity_courses.xml 
<?xml version="1.0" encoding="utf-8"?> 
<ListView xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/list_courses" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:background="#2C3E50" > 

</ListView>

我的數據庫

public class DBHelper extends SQLiteOpenHelper { 

    public static final String DATABASE_NAME = "Registration.db"; 
    // Table SEM_COURSE 
    public static final String SEM_COURSE_TABLE_NAME = "sem_course"; 
    public static final String SEM_COURSE_COLUMN_STD_ID = "stdID"; 
    public static final String SEM_COURSE_COLUMN_SEM_ID = "semID"; 
    public static final String SEM_COURSE_COLUMN_COURSE_ID = "courseID"; 
    public static final String SEM_COURSE_COLUMN_TIME_ID = "timePeriodID"; 
    public static final String SEM_COURSE_COLUMN_ROOM_ID = "roomID"; 
    public static final String SEM_COURSE_COLUMN_INSTRUCTOR_ID = "instructorID"; 
    public static final String SEM_COURSE_COLUMN_DAY = "day"; 
public DBHelper(Context context) { 
     super(context, DATABASE_NAME, null, 1); 
    } 

    @Override 
    public void onCreate(SQLiteDatabase db) { 
// SEM_COURSE TABLE CREATION 
     db.execSQL("CREATE TABLE IF NOT EXISTS " + SEM_COURSE_TABLE_NAME + 
       "(" + SEM_COURSE_COLUMN_SEM_ID + " INTEGER REFERENCES " + SEMESTER_TABLE_NAME + "(" + SEMESTER_COLUMN_ID + ") ON UPDATE CASCADE ON DELETE CASCADE, " + 
       SEM_COURSE_COLUMN_INSTRUCTOR_ID + " INTEGER REFERENCES " + INSTRUCTOR_TABLE_NAME + "(" + INSTRUCTOR_COLUMN_ID + ") ON UPDATE CASCADE ON DELETE CASCADE, " + 
       SEM_COURSE_COLUMN_COURSE_ID + " INTEGER REFERENCES " + COURSE_TABLE_NAME + "(" + COURSE_COLUMN_ID + ") ON UPDATE CASCADE ON DELETE CASCADE, " + 
       SEM_COURSE_COLUMN_ROOM_ID + " INTEGER REFERENCES " + ROOM_TABLE_NAME + "(" + ROOM_COLUMN_ID + ") ON UPDATE CASCADE ON DELETE SET NULL, " + 
       SEM_COURSE_COLUMN_TIME_ID + " INTEGER REFERENCES " + TIMEPERTIOD_TABLE_NAME + "(" + TIMEPERTIOD_COLUMN_ID + ") ON UPDATE CASCADE ON DELETE CASCADE, " + 
       SEM_COURSE_COLUMN_STD_ID + " INTEGER REFERENCES " + STUDENT_TABLE_NAME + "(" + STUDENT_COLUMN_ID + ") ON UPDATE CASCADE ON DELETE CASCADE, " + 
       SEM_COURSE_COLUMN_DAY + " TEXT, " + "PRIMARY KEY(" + SEM_COURSE_COLUMN_SEM_ID + ", " + SEM_COURSE_COLUMN_COURSE_ID + ", " + SEM_COURSE_COLUMN_INSTRUCTOR_ID + ", " + SEM_COURSE_COLUMN_ROOM_ID 
       + ", " + SEM_COURSE_COLUMN_STD_ID + ", " + SEM_COURSE_COLUMN_TIME_ID + "));");     
    } 
    public Cursor executeQuery(String sql) { 
     SQLiteDatabase db = getReadableDatabase(); 
     Cursor cur = db.rawQuery(sql, null);   
     return cur; 
    } 
}

ShowSchedule.java

public class ShowSchedule extends Activity { 
    private DBHelper db; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) {   
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_courses); 
     db = new DBHelper(this); 
     String stdID = HomePage.STD_ID; 
     String[] columns = new String[] { 
       DBHelper.COURSE_COLUMN_NAME 
    }; 

     int[] to = new int[] { 
       R.id.tvCourseName1, 
    }; 
     // select courseName from course where course.courseID in (select courseID from sem_course where sem_course.stdID = stdID) 
     String query = "select " + DBHelper.COURSE_COLUMN_ID + " as _id, " + DBHelper.COURSE_COLUMN_NAME + " from " + DBHelper.COURSE_TABLE_NAME + 
       " where " + DBHelper.COURSE_COLUMN_ID + " in (select " + DBHelper.SEM_COURSE_COLUMN_COURSE_ID 
       + " as _id from " + DBHelper.SEM_COURSE_TABLE_NAME + " where " + 
       DBHelper.SEM_COURSE_COLUMN_STD_ID + " = " + stdID + ")"; 

     ListView mainList = (ListView) findViewById(R.id.list_courses);  
     Cursor cursor = db.executeQuery(query);   
     // CoursesAdapter adapter = new CoursesAdapter(this, cursor); 
     SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, R.layout.activity_list_item, 
       cursor, columns, to, 0); 
     mainList.setAdapter(adapter); 
    } 
}

什麼，我得到的是隻有在充滿課程名稱每個項目列表中的第一次塊，雖然課程都應該在同一個塊，但不同的時間塊..

任何人都可以請幫我？

來源

2015-01-08 user3212556

你正在引用'tvCourseName1'，所以這是填充的文本視圖。 – njzk2

嘗試打印提取的光標數據 – VVB

我不知道你是否已經解決了這個問題，但看起來你正在使用遊標適配器和listview不正確。不是創建一個包含所有課程名稱的佈局，而是創建一個佈局，該佈局將被列表視圖的一行使用。然後，當您設置適配器時，您可以使用所需的內容填充每個文本視圖。每一個被拉的課程都將採用相同的格式並正確打印。

來源

2015-11-03 18:23:17 d0ktadr3y

格式化一個簡單的光標適配器

回答

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