//我的xml代码
<ScrollView
android:id="@+id/scrollview"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_marginTop="35dp">
<RelativeLayout
android:id="@+id/relativeLayout2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="5dp"
android:layout_marginTop="5dp"
android:background="@android:color/background_light"
android:gravity="center"
android:paddingBottom="5dp" >
<TextView
android:id="@+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView3"
android:layout_below="@+id/textView3"
android:text="Venue, Date"
android:textSize="12sp" />
<TextView
android:id="@+id/textView5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView4"
android:layout_below="@+id/textView4"
android:text="Description"
android:textSize="12sp"
android:paddingBottom="5dp" />
<ImageView
android:id="@+id/imageView7"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/textView2"
android:layout_marginTop="14dp"
android:src="@drawable/demo" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="5dp"
android:text="Event of the Week" />
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/imageView7"
android:layout_marginLeft="14dp"
android:text="Event Name" />
<GridView
android:id="@+id/gridView1"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:layout_alignParentLeft="true"
android:layout_below="@+id/textView6"
android:layout_marginTop="14dp"
android:horizontalSpacing="10dp"
android:numColumns="2"
android:paddingBottom="5dp"
android:verticalSpacing="10dp" />
<TextView
android:id="@+id/textView6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/textView5"
android:layout_centerHorizontal="true"
android:layout_marginTop="14dp"
android:text="Today's Events" />
</RelativeLayout>
</ScrollView>
// MainActivity
class LoadProfile extends AsyncTask<String, String, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(EventHome.this);
pDialog.setMessage("Loading...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
protected String doInBackground(String... args) {
// Building Parameters
String json = null;
PROFILE_URL = "http://www.example.com/filter_event_android.php?pin="+phone;
try {
List<NameValuePair> params = new ArrayList<NameValuePair>();
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(PROFILE_URL);
httppost.setEntity(new UrlEncodedFormEntity(params));
// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);
HttpEntity resEntity = response.getEntity();
json = EntityUtils.toString(resEntity);
Log.i("All Events: ", json.toString());
} catch (Exception e) {
e.printStackTrace();
}
return json;
}
@SuppressLint("InlinedApi") @Override
protected void onPostExecute(String json) {
super.onPostExecute(json);
pDialog.dismiss();
try{
event = new JSONObject(json);
final ArrayList<HashMap<String, String>> arraylist = new ArrayList<HashMap<String, String>>();
JSONArray user = event.getJSONArray("events");
String contains=json.toString();
if(contains.contains("id"))
{
for (int i = 0; i < user.length(); i++) {
JSONObject object = user.getJSONObject(i);
HashMap<String, String> map = new HashMap<String, String>();
map.put("id", object.getString("id"));
map.put("name", object.getString("name"));
map.put("date_d", object.getString("date_d"));
map.put("location", object.getString("location"));
map.put("images", "http://www.example.com/"+object.getString("images"));
arraylist.add(map);
}
String[] from = {"name", "date_d", "location", "images"};
int[] to = {R.id.textView1, R.id.textView2, R.id.textView3, R.id.iv_flag};
ListAdapter adapters = new MyAdapter(EventHome.this,arraylist,R.layout.list_event_home,from,to);
gv1.setAdapter(adapters);
}
else
{
gv1.setVisibility(View.GONE);
TextView dynamicTextView = new TextView(EventHome.this);
dynamicTextView.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
dynamicTextView.setText("No events available");
}
gv1.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub
Intent i = new Intent(EventHome.this,EventSingle.class);
i.putExtra("event_id", arraylist.get(arg2).get("id"));
startActivity(i);
}
});
}catch(Exception e)
{
e.printStackTrace();
}
}
}
// MyAdapter.java
public class MyAdapter extends SimpleAdapter{
public MyAdapter(Context context, List<? extends Map<String, ?>> data, int resource, String[] from, int[] to){
super(context, data, resource, from, to);
}
public View getView(int position, View convertView, ViewGroup parent){
// here you let SimpleAdapter built the view normally.
View v = super.getView(position, convertView, parent);
// Then we get reference for Picasso
ImageView img = (ImageView) v.getTag();
if(img == null){
img = (ImageView) v.findViewById(R.id.iv_flag);
v.setTag(img); // <<< THIS LINE !!!!
}
// get the url from the data you passed to the `Map`
@SuppressWarnings("rawtypes")
String url = (String) ((Map)getItem(position)).get("images");
// do Picasso
Picasso.with(v.getContext()).load(url).into(img);
// return the view
return v;
}
}
上面的布局在gridview中只显示了一行值。但是我对gridview有5个以上的值。为什么它没有显示其他值。我试了很多但没有用。有没有人有解决方案。
答案 0 :(得分:14)
这可能是由GridView
内ScrollView
引起的。由于两个布局都是可滚动的,因此会导致很多问题,在这种情况下,GridView
的高度无法正确确定,滚动事件会被ScrollView
吃掉。
使用ListView
,您只需将ListView
声明为根元素,然后将其他可滚动内容添加为页眉或页脚。 GridView
本身不支持这一点,但幸运的是HeaderGridView
的子类实现解决了这个问题。
你应该做的只是将HeaderGridView
放到活动膨胀的xml中。
<?xml version="1.0" encoding="utf-8"?>
<your.package.HeaderGridView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/gridView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:horizontalSpacing="10dp"
android:numColumns="2"
android:verticalSpacing="10dp" />
然后将RelativeLayout
实现为不同xml中的标题视图(例如header.xml
)
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/relativeLayout2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:layout_marginTop="5dp"
android:background="@android:color/background_light"
android:gravity="center"
android:paddingBottom="5dp">
<TextView
android:id="@+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView3"
android:layout_below="@+id/textView3"
android:text="Venue, Date"
android:textSize="12sp" />
<TextView
android:id="@+id/textView5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView4"
android:layout_below="@+id/textView4"
android:text="Description"
android:textSize="12sp"
android:paddingBottom="5dp" />
<ImageView
android:id="@+id/imageView7"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/textView2"
android:layout_marginTop="14dp"
android:src="@drawable/demo" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="5dp"
android:text="Event of the Week" />
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/imageView7"
android:layout_marginLeft="14dp"
android:text="Event Name" />
<TextView
android:id="@+id/textView6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/textView5"
android:layout_centerHorizontal="true"
android:layout_marginTop="14dp"
android:text="Today's Events" />
</RelativeLayout>
在您的活动中,您将标题添加到HeaderGridView
HeaderGridView gridView = (HeaderGridView) findViewById(R.id.gridView1);
View header = getLayoutInflater().inflate(R.layout.header, gridView, false);
gridView.addHeaderView(header);
// set adapter AFTER adding headerViews
gridView.setAdapter(MyAdapter(...))
尝试过,像魅力一样工作。希望它有所帮助!
答案 1 :(得分:0)
我发现的问题和修复是,如果gridview有行数据绑定,那么select语句必须在我的情况下具有该特定字段我正在评估Grade并且此等级未包含在我的select语句中且gridview返回单个除了我在选择语句中包含成绩的那一刻,问题已经解决了
Protected Sub GVRos_RowDataBound(sender As Object, e As GridViewRowEventArgs) Handles GVRos.RowDataBound
If e.Row.RowType = DataControlRowType.DataRow Then
Dim stat As String
'This row evaluates and puts the value in stat as per the Finalised columon result
stat = DataBinder.Eval(e.Row.DataItem, "Grade").ToString()
If stat = "A" Then
e.Row.BackColor = System.Drawing.Color.LightGreen
ElseIf stat = "B" Then
e.Row.BackColor = System.Drawing.Color.LightBlue
ElseIf stat = "C" Then
e.Row.BackColor = System.Drawing.Color.Yellow
ElseIf stat = "D" Then
e.Row.BackColor = System.Drawing.Color.Orange
ElseIf stat = "F" Then
e.Row.BackColor = System.Drawing.Color.Red
Else
e.Row.BackColor = System.Drawing.Color.White
End If
End If
End Sub