如何在适配器中添加项目以在android中自定义列表视图？

Question

我在HashMap中有一些小时和分钟。我的代码在这里http://pastie.org/8394598 我的输出是这样的

但是我的预期输出是

如何使用自定义列表视图添加此类型的哈希映射？我错在哪里？有人能告诉我吗？提前谢谢。

Answer 1

// try this

**activity.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="wrap_content"
        android:descendantFocusability="blocksDescendants">

    <ListView
            android:id="@+id/lst"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:cacheColorHint="#00000000"
            android:divider="@null"
            android:dividerHeight="0dp"
            android:smoothScrollbar="true"/>
</LinearLayout>

**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="wrap_content"
              android:padding="5dp">

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:gravity="center"
        android:padding="20dp"
            android:background="@android:color/holo_orange_dark">

        <TextView
                android:id="@+id/txtHours"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="@android:color/white"
                android:textSize="30sp"
                android:text="12 PM"/>

        </LinearLayout>
    <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:gravity="center_vertical"
            android:layout_weight="1"
            android:padding="20dp"
            android:background="@android:color/holo_orange_light">
    <TextView
            android:id="@+id/txtMinute"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="@android:color/white"
            android:textSize="20sp"
            android:text="32"/>

    <TextView
            android:id="@+id/txtSecond"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="10dp"
            android:textColor="@android:color/white"
            android:textSize="20sp"
            android:text="30"/>
        </LinearLayout>
</LinearLayout>

**MainActivity**
public class MainActivity extends Activity {

    private ListView lst;
    private CustomAdapter adapter;
    ArrayList<HashMap<String,String>> data;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        lst = (ListView) findViewById(R.id.lst);

        data = new ArrayList<HashMap<String, String>>();
        HashMap<String,String> row1 = new HashMap<String, String>();
        row1.put("hours","12 PM");
        row1.put("minute","30");
        row1.put("second","45");
        HashMap<String,String> row2 = new HashMap<String, String>();
        row2.put("hours","01 PM");
        row2.put("minute","31");
        row2.put("second","46");
        HashMap<String,String> row3 = new HashMap<String, String>();
        row3.put("hours","02 PM");
        row3.put("minute","32");
        row3.put("second","47");
        HashMap<String,String> row4 = new HashMap<String, String>();
        row4.put("hours","03 PM");
        row4.put("minute","33");
        row4.put("second","48");
        HashMap<String,String> row5 = new HashMap<String, String>();
        row5.put("hours","04 PM");
        row5.put("minute","34");
        row5.put("second","49");
        data.add(row1);
        data.add(row2);
        data.add(row3);
        data.add(row4);
        data.add(row5);

        adapter = new CustomAdapter(this,data);
        lst.setAdapter(adapter);

        lst.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int pos, long l) {
                Toast.makeText(MainActivity.this,data.get(pos).get("hours")+":"+data.get(pos).get("minute")+":"+data.get(pos).get("second"),Toast.LENGTH_LONG).show();
            }
        });

    }

    class CustomAdapter extends BaseAdapter {

        Context context;
        ArrayList<HashMap<String,String>> data;

        public CustomAdapter(Context context, ArrayList<HashMap<String,String>> data){

            this.context = context;
            this.data = data;
        }

        @Override
        public int getCount() {
            return data.size();
        }

        @Override
        public Object getItem(int pos) {
            return data.get(pos);
        }

        @Override
        public long getItemId(int pos) {
            return pos;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            ViewHolder holder;
            if(convertView==null){
                holder = new ViewHolder();
                convertView = LayoutInflater.from(context).inflate(R.layout.list_item,null,false);
                holder.txtHours = (TextView) convertView.findViewById(R.id.txtHours);
                holder.txtMinute = (TextView) convertView.findViewById(R.id.txtMinute);
                holder.txtSecond = (TextView) convertView.findViewById(R.id.txtSecond);
                convertView.setTag(holder);
            }else{
                holder = (ViewHolder) convertView.getTag();
            }

            holder.txtHours.setText(data.get(position).get("hours"));
            holder.txtMinute.setText(data.get(position).get("minute"));
            holder.txtSecond.setText(data.get(position).get("second"));

            convertView.setTag(holder);
            return convertView;
        }

        class ViewHolder {
            TextView txtHours;
            TextView txtMinute;
            TextView txtSecond;
        }

    }
}

![enter image description here][1]


  [1]: http://i.stack.imgur.com/cB2yI.png

Answer 2

通过扩展SimpleAdapter类来创建自定义适配器。以下是一个示例：http://dustinbreese.blogspot.com/2009/12/creating-listview-with-alternating.html