【发布时间】：2014-03-21 05:19:42
【问题描述】：
我有一个使用特殊适配器组合在一起的 ListView，这样我就可以用不同的颜色显示所有其他列表视图。如何编写代码，以便无需扩展 ListActivity（我的活动仅扩展 Activity）即可查看清单。这是我的代码。
public class TrackingMe extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
setContentView(R.layout.trackingme_layout);
getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE,
R.layout.custom_title_3);
SharedPreferences prefs = getSharedPreferences("Settings", 0);
final String id = prefs.getString("ID", "");
final TextView myTitleText = (TextView) findViewById(R.id.tvTitle3);
if (myTitleText != null)
myTitleText.setText(getResources().getString(R.string.Trackingme));
ImageButton addFriends = (ImageButton) findViewById(R.id.btnAddFriends);
addFriends.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent addFriends = new Intent("com.cellphone.INVITEFOLLOWER");
startActivity(addFriends);
}
});
final ListView lv2 = (ListView) findViewById(R.id.trackingmelistview);
lv2.setChoiceMode(2);
lv2.setTextFilterEnabled(true);
refreshList(id,lv2);
ImageButton refresh = (ImageButton) findViewById(R.id.btnRefresh2);
refresh.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
refreshList(id, lv2);
}
});
}
static final ArrayList<HashMap<String, String>> list2 = new ArrayList<HashMap<String, String>>();
private void refreshList(String id, ListView lv) {
// removes the list and rebuilds it will choose different response
// string to get the refreshed times.
DefaultHttpClient httpclient = new DefaultHttpClient();
HttpPost httpost = new HttpPost(
"http://iphone-radar.com/people_i_follow");
JSONObject holder = new JSONObject();
try {
holder.put("userid", id);
// pacific time zone for now
StringEntity se = new StringEntity(holder.toString());
httpost.setEntity(se);
httpost.setHeader("Accept", "application/json");
httpost.setHeader("Content-type", "application/json");
ResponseHandler responseHandler = new BasicResponseHandler();
final String response = httpclient
.execute(httpost, responseHandler);
list2.removeAll(list2);
SpecialAdapter adapter = new SpecialAdapter(this, list2,
R.layout.trackingme_row_layout, new String[] { "name" }, new int[] { R.id.tvTrackingMeNames});
org.json.JSONObject obj = new org.json.JSONObject(response);
JSONArray tracking_users = obj.getJSONArray("d");
for (int i = 0; i < tracking_users.length(); i++) {
// for loop to get all data
HashMap<String, String> temp = new HashMap<String, String>();
JSONObject user = tracking_users.getJSONObject(i);
temp.put("name", user.getString("full_name"));
list2.add(temp);
// upload location time
}
lv.setAdapter(adapter);
} catch (JSONException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
//here is the special adapter so that everyother line is a different color
public class SpecialAdapter extends SimpleAdapter {
private int[] colors = new int[] { Color.GRAY, Color.WHITE };
public SpecialAdapter(Context context,
ArrayList<HashMap<String, String>> list, int resource,
String[] from, int[] to) {
super(context, list, resource, from, to);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = super.getView(position, convertView, parent);
int colorPos = position % colors.length;
view.setBackgroundColor(colors[colorPos]);
return view;
}
}
到目前为止，它根据我从来源获得的信息显示为一行文本。但是，当我单击单个行时，它们不会突出显示，即使我编写了 lv.setChoiceMode(2)，列表视图旁边也没有复选框。谢谢
编辑这里是我的 trackingme_row_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:id="@+id/tvTrackingMeNames"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_marginLeft="31dp"
android:text="TextView"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#000000"/>
</RelativeLayout>
和 trackingme_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ListView
android:id="@+id/trackingmelistview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:paddingTop="10dp"/>
<ImageButton
android:id="@+id/btnRefresh2"
android:text="Refresh"
android:src="@android:drawable/stat_notify_sync"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"/>
</RelativeLayout>
【问题讨论】：
-
最好使用预定义的常量。
lst.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE); -
看看 layout.trackingme_row_layout 将有助于理解。请在您的问题中发布该 xml 布局。
-
我发布了 xml 布局，感谢您的帮助