Question

我正在使用这种类型的数据结构

static List<String> displaypart = new ArrayList<String>();
static List<String> displayitalic = new ArrayList<String>();
static List<String> displayA_name = new ArrayList<String>();
static List<String> displayAS_name = new ArrayList<String>();

我已通过此代码将数据库的值添加为数据库

String strquery="select * from Articles where AS_name LIKE '%"+querytext+"%'";
    cur=db.rawQuery(strquery,null); 
    if(cur!=null&&cur.moveToFirst())
    {
    do
                {
                    Flag.displaypart.add(cur.getString(7));
                    Flag.displayA_name.add(cur.getString(2));
                    Flag.displayitalic.add(cur.getString(8));
                    Flag.displayAS_name.add(cur.getString(3));
                    Flag.displayDesc_art.add(cur.getString(4));
                    i++;
                }
                while(cur.moveToNext());
    }  
}

我的要求是在listview中显示这些数据。每个单元格由4个文本视图组成。为此我做了

query_cell.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:background="#FFFFFF" 
android:orientation="vertical"
android:id="@+id/querylinearlayout">

<TextView
    android:id="@+id/textView1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="Large Text"
    android:gravity="center"
    android:textAppearance="?android:attr/textAppearanceLarge" />

<TextView
    android:id="@+id/textView2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="Medium Text"
    android:gravity="center"
    android:textAppearance="?android:attr/textAppearanceMedium" />

<TextView
    android:id="@+id/textView3"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="Small Text"
    android:gravity="center"
    android:textAppearance="?android:attr/textAppearanceSmall" />

<TextView
    android:id="@+id/textView4"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="Medium Text"

    android:textAppearance="?android:attr/textAppearanceMedium" />

<TextView                                 // this textview just gives the black color margin
    android:id="@+id/textView5"
    android:layout_marginTop="10dp"
    android:layout_width="match_parent"
    android:layout_height="2dp"
    android:background="#000000"
    android:text="TextView" />

</LinearLayout>

我想在Listview中充气！
query_fragment.xml 由listview

组成

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FFFFFF" 
android:id="@+id/queryrelativelayout">

<ListView
    android:id="@+id/listView1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:layout_centerVertical="true" >
</ListView>

</RelativeLayout>

我的问题是如何将query_cell.xml扩展到此列表视图中？

为此，我在onCreateView这样的

中引用了listview

listview1 = (ListView)rootView.findViewById(R.id.listView1);

我看过一些教程使自定义适配器扩展BaseAdapter，一些扩展了ArrayList，我也很困惑它的构造函数应该是什么样的，＆amp;也应该使用或不使用持有人getView。

我的CustomAdapter应该是什么样的。你会怎么做？如果您有自己的实施方式，我也会欣赏不同的编码风格。

请帮忙

先谢谢

AFTET SQUONK ANSWER Logcat

07-28 23:13:14.979: E/AndroidRuntime(3040): FATAL EXCEPTION: main
07-28 23:13:14.979: E/AndroidRuntime(3040): java.lang.IllegalArgumentException: column '_id' does not exist
07-28 23:13:14.979: E/AndroidRuntime(3040):     at android.database.AbstractCursor.getColumnIndexOrThrow(AbstractCursor.java:302)
07-28 23:13:14.979: E/AndroidRuntime(3040):     at android.support.v4.widget.CursorAdapter.init(CursorAdapter.java:174)
07-28 23:13:14.979: E/AndroidRuntime(3040):     at android.support.v4.widget.CursorAdapter.<init>(CursorAdapter.java:151)
07-28 23:13:14.979: E/AndroidRuntime(3040):     at android.support.v4.widget.ResourceCursorAdapter.<init>(ResourceCursorAdapter.java:93)
07-28 23:13:14.979: E/AndroidRuntime(3040):     at android.support.v4.widget.SimpleCursorAdapter.<init>(SimpleCursorAdapter.java:89)
07-28 23:13:14.979: E/AndroidRuntime(3040):     at com.vivekwarde.indianconstitution.DBAdapter.queryArticles(DBAdapter.java:271)
07-28 23:13:14.979: E/AndroidRuntime(3040):     at com.vivekwarde.indianconstitution.QueryFragment.onCreateView(QueryFragment.java:44)
07-28 23:13:14.979: E/AndroidRuntime(3040):     at android.support.v4.app.Fragment.performCreateView(Fragment.java:1500)
07-28 23:13:14.979: E/AndroidRuntime(3040):     at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:938)
07-28 23:13:14.979: E/AndroidRuntime(3040):     at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1115)
07-28 23:13:14.979: E/AndroidRuntime(3040):     at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
07-28 23:13:14.979: E/AndroidRuntime(3040):     at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1478)
07-28 23:13:14.979: E/AndroidRuntime(3040):     at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:446)
07-28 23:13:14.979: E/AndroidRuntime(3040):     at android.os.Handler.handleCallback(Handler.java:615)
07-28 23:13:14.979: E/AndroidRuntime(3040):     at android.os.Handler.dispatchMessage(Handler.java:92)
07-28 23:13:14.979: E/AndroidRuntime(3040):     at android.os.Looper.loop(Looper.java:137)
07-28 23:13:14.979: E/AndroidRuntime(3040):     at android.app.ActivityThread.main(ActivityThread.java:4794)
07-28 23:13:14.979: E/AndroidRuntime(3040):     at java.lang.reflect.Method.invokeNative(Native Method)
07-28 23:13:14.979: E/AndroidRuntime(3040):     at java.lang.reflect.Method.invoke(Method.java:511)
07-28 23:13:14.979: E/AndroidRuntime(3040):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
07-28 23:13:14.979: E/AndroidRuntime(3040):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
07-28 23:13:14.979: E/AndroidRuntime(3040):     at dalvik.system.NativeStart.main(Native Method)

Answer 1

使用SimpleCursorAdapter ...

的基本示例

public void initAdapter(Context ctx, ListView myListView) {
    String strquery = "SELECT unique_column_name AS _id,column1,column2,column3,column4 FROM MY_TABLE";
    cur = db.rawQuery(strquery,null);

    if (cur != null && cur.getCount() > 0) {
        String[] fromColumns = { "column1", "column2", "column3", "column4" };
        int[] toViews = { R.id.textView1, R.id.textView2, R.id.textView3, R.id.textView4 };

        SimpleCursorAdapter adapter = new SimpleCursorAdapter(ctx, 
                R.layout.query_cell, cur, fromColumns, toViews, 0);
        myListView.setAdapter(adapter);
    }
}

从Activity使用...

调用方法时

initAdapter(this, listView1);

从Fragment使用...

initAdapter(getActivity(), listView1);

在上面，fromColumns数组是要映射到TextViews的数据库列的名称，toViews数组是每个TextView的资源标识符。在列表项布局中（您的query_cell，xml布局文件）。

在SimpleCursorAdapter构造函数中，您只需传入列表项布局资源ID（R.layout.query_cell），列和视图数组以及SimpleCursorAdapter将完成所有其余工作对你而言。

显示来自＆＃34;列表＆＃34;的自定义列表视图

1 个答案: