我对 SimpleCursorAdapter 和 ListView 有疑问。当我想通过从数据库中查询来创建动态列表菜单时。问题是列表视图无法设置 onClickListener 在用户单击时执行某些操作。这些是我的代码。
在文件“menu_header.xml”中
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/menu_bar"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingLeft="5dip"
android:paddingRight="5dip"
android:background="@drawable/menu_background">
<Button
android:id="@+id/bt_back"
android:layout_width="70dip"
android:layout_height="40dip"
android:layout_centerVertical="true"
android:text="@string/menu_back" />
<ImageButton
android:id="@+id/bt_search"
android:layout_width="50dip"
android:layout_height="50dip"
android:background="@null"
android:src="@android:drawable/ic_menu_search"
android:layout_alignParentRight="true"
android:paddingLeft="5dip"
android:paddingRight="5dip" />
</RelativeLayout>
文件“menu_wrapper.xml”
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<include layout="@layout/menu_header" />
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<ListView
android:id="@android:id/list"
android:layout_below="@id/menu_bar"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
</RelativeLayout>
</LinearLayout>
在文件“menu_choice.xml”中
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@drawable/menu_selector"
android:clickable="true"
android:padding="10dip">
<LinearLayout
android:id="@+id/thumbnail"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="3dip"
android:layout_alignParentLeft="true"
android:background="@drawable/image_bg"
android:layout_marginRight="10dip">
<ImageView
android:id="@+id/list_image"
android:layout_width="60dip"
android:layout_height="60dip"
android:src="@drawable/building" />
</LinearLayout>
<TextView
android:id="@+id/eng_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="@+id/thumbnail"
android:layout_toRightOf="@+id/thumbnail"
android:text="Building"
android:textColor="#040404"
android:typeface="sans"
android:paddingTop="5dip"
android:textSize="20dip"
android:textStyle="bold" />
<TextView
android:id="@+id/thai_name"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@id/eng_name"
android:textColor="#343434"
android:textSize="15dip"
android:layout_marginTop="3dip"
android:layout_toRightOf="@+id/thumbnail"
android:text="Test" />
<ImageView android:layout_width="15dip"
android:layout_height="15dip"
android:src="@drawable/next_arrow"
android:layout_alignParentRight="true"
android:layout_centerVertical="true" />
</RelativeLayout>
最后一个是我用来创建菜单的文件
public class Menu extends ListActivity {
private ListView listView;
private ImageButton imageButtonSearch;
private Button buttonBack;
private Constants constants = Constants.getInstance();
private Database database = new Database(this);
private Beans beans = Beans.getInstance();
private Context context = this;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.menu_wrapper);
buttonBack = (Button)findViewById(R.id.bt_back);
imageButtonSearch = (ImageButton)findViewById(R.id.bt_search);
buttonBack.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
finish();
}
});
imageButtonSearch.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent i = new Intent();
i.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivityForResult(new Intent(context, Search.class), beans.REQUEST_CODE);
}
});
listView = this.getListView();
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
Log.d("Item Click","item click");
}
});
database.open();
Cursor cursorPlaceType = database.getPlaceType();
startManagingCursor(cursorPlaceType);
if(cursorPlaceType != null){
String[] columns = new String[]{ constants.PLACE_TYPE_IMAGE, constants.PLACE_TYPE_ENAME, constants.PLACE_TYPE_TNAME };
int[] to = new int[]{ R.id.list_image, R.id.eng_name, R.id.thai_name };
SimpleCursorAdapter menuAdapter = new SimpleCursorAdapter(this, R.layout.menu_choice, cursorPlaceType, columns, to);
menuAdapter.setViewBinder(new SimpleCursorAdapter.ViewBinder() {
@Override
public boolean setViewValue(View view, Cursor cursor, int columnIndex) {
if(view.getId() == R.id.list_image){
try {
String imageFile = constants.IMAGE_ASSETS + cursor.getString(columnIndex) + ".png";
Bitmap bitmap = BitmapFactory.decodeStream(getAssets().open(imageFile));
((ImageView)view).setImageBitmap(bitmap);
} catch (IOException e) { e.printStackTrace(); }
return true;
}//end if
return false;
}//end setViewValue
});
this.setListAdapter(menuAdapter);
}else{
new AlertDialog.Builder(this)
.setMessage("Try again")
.setNeutralButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
finish();
}
}).show();
}
}//end onCreate()
确实感谢您的帮助。