Question

我是Android的新用户和使用列表视图的新手，我想在选择时更改列表项颜色，但它不起作用。

我已检查堆栈溢出的几乎所有链接并尝试了所有但没有运气...请检查我的代码...并告诉我问题出在哪里。

public class Main extends Activity {

    private ListView listView;
    private String[] menuArray;
    private List<String> menuList = new ArrayList<String>();
    @Override
    public void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        menuArray = getResources().getStringArray(R.array.Menu);
        menuList = Arrays.asList(menuArray);

        listView = (ListView) findViewById(R.id.listView_main_menu);
        listView.setAdapter(new EfficientAdapter(this,menuList));       
    }

/******************************** EfficientAdapter ************************************/

    public class EfficientAdapter extends BaseAdapter{


        private LayoutInflater mInflater;
        @SuppressWarnings("unused")
        private String TAG=EfficientAdapter.class.getSimpleName();
        @SuppressWarnings("unused")
        private Context context;

        private List<String> data= new ArrayList<String>();

        public EfficientAdapter(Context context,List<String> data) {
            super();
            mInflater = LayoutInflater.from(context);
            this.context=context;
            this.data.addAll(data);
        }


        public EfficientAdapter(Context context) {
            super();
            mInflater = LayoutInflater.from(context);
            this.context=context;
        }
        public View getView(final int position, View convertView, final ViewGroup parent) {

            ViewHolder holder;

            if(convertView == null){
                convertView = mInflater.inflate(R.layout.main_list, null);              
                holder = new ViewHolder();
                holder.textLine = (TextView) convertView.findViewById(R.id.textView_mainlist_item);
                convertView.setTag(holder);
            }
            holder =(ViewHolder) convertView.getTag();
            holder.textLine.setText(getItem(position));

            convertView.setOnClickListener(new OnClickListener() {
                public void onClick(View v) {

                }
            });

            return convertView;
        }

        public int getCount() {
            // TODO Auto-generated method stub
            return data.size();
        }

        public String getItem(int position) {
            // TODO Auto-generated method stub
            return data.get(position);
        }

        public long getItemId(int position) {
            // TODO Auto-generated method stub
            return 0;
        }

        class ViewHolder {
            TextView textLine;
        }
    }
}

这是我的带有列表视图的

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android1="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@color/Gainsboro" android:orientation="vertical" xmlns:android="http://schemas.android.com/apk/res/android"> <ListView android:id="@+id/listView_main_menu" android:layout_width="match_parent" android:layout_height="wrap_content" android:cacheColorHint="#00000000" android:choiceMode="singleChoice" android:divider="@color/DarkGray" android:dividerHeight="1dip" android:fadingEdge="none" android:listSelector="@drawable/row_color" android:scrollbars="none" > </ListView> </RelativeLayout>

row_color.xml

<item android:state_pressed="false" android:state_focused="false" android:drawable="@color/Green" /> <item android:state_focused="true" android:drawable="@color/Blue" /> <item android:state_pressed="true" android:drawable="@color/Brown" /> <item android:state_selected="true" android:drawable="@color/Cyan" />

main_list.xml;这个xml包含正在膨胀的textview

<?xml version="1.0" encoding="utf-8"?> <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <TextView android:id="@+id/textView_mainlist_item" android:layout_width="match_parent" android:layout_height="wrap_content" android:paddingBottom="10dp" android:paddingLeft="20dp" android:paddingTop="10dp" android:text="TextView" android:textColor="@color/DarkSlateGray" android:textSize="20sp" android:textStyle="bold" /> <TextView android:id="@+id/TextView01" android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="right|center" android:paddingRight="30dp" android:paddingTop="6dp" android:text=">" android:textColor="@color/DarkSlateGray" android:textSize="28sp" android:textStyle="bold" /> </FrameLayout>

刚发现只有这部分工作正常

<item android:state_pressed="false" android:state_focused="false" android:drawable="@color/Green" />

Answer 1

而不是

convertView = mInflater.inflate(R.layout.main_list, null);

尝试

convertView = mInflater.inflate(R.layout.main_list, parent, false);

修改：

我看到你现在要做的事情。您不希望在ListView上拥有android:ListSelector，而是在每个FrameLayout上拥有<?xml version="1.0" encoding="utf-8"?> <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:listSelector="@drawable/row_color" >。所以：

{{1}}

您需要将它应用于每个单独的视图，以便在按下时更改颜色等。

Answer 2

访问http://android-codes-examples.blogspot.in/2011/03/customized-listview-items-selection.html

希望它适合你

Android ListView列表：选择器不起作用

2 个答案: