kann nicht Symbol HorizontalListView

Question

Ich versuche, eine horizontale Listenansicht in meiner Tätigkeit zu erklären, wie diese

private LinearLayout lay; 
    HorizontalListView listview; 

lösen jedoch die HorizontalListView in rot markiert ist, und ich erhalte die Fehler

"Can not Symbol HorizontalListView lösen" Java-Datei

package com.xera.deviceinsight.home; 

import java.text.DecimalFormat; 
import java.util.Arrays; 
import java.util.Collections; 
import java.util.List; 

import android.app.Activity; 
import android.os.Bundle; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.view.ViewGroup; 
import android.widget.BaseAdapter; 
import android.widget.LinearLayout; 
import android.widget.TextView; 
import android.widget.Toast; 
public class SensorCharts extends Activity{ 

    private LinearLayout lay; 
    HorizontalListView listview; 
    private double highest; 
    private int[] grossheight; 
    private int[] netheight; 
    private Double[] grossSal= {15000.0,15000.0,15000.25,15000.1, 
     15000.0,15000.0,15000.0,15000.0, 
     15000.25,15000.1,15000.0,15000.0}; 

    private Double[] netSal = {12000.0,13000.0,14000.25,10000.1, 
     10000.0,9000.0,12000.0,13000.0, 
     14000.25,10000.1,10000.0,9000.0}; 

    private String[] datelabel = {"Jan 12","Feb 12","Mar 12", 
     "Apr 12","May 12","Jun 12", 
     "Jul 12","Aug 12","Sep 12", 
     "Oct 12","Nov 12","Dec 12"}; 


    public void onCreate(Bundle savedInstance) 
    { 
     super.onCreate(savedInstance); 
     setContentView(R.layout.main); 
     lay = (LinearLayout)findViewById(R.id.linearlay); 
     listview = (HorizontalListView) findViewById(R.id.listview); 

     List<Double> b = Arrays.asList(grossSal); 
     highest = (Collections.max(b)); 

     netheight = new int[netSal.length]; 
     grossheight= new int[grossSal.length]; 
     //updateSizeInfo(); 

    } 

    public class bsAdapter extends BaseAdapter 
    { 
     Activity cntx; 
     String[] array; 
     public bsAdapter(Activity context,String[] arr) 
     { 
     // TODO Auto-generated constructor stub 
     this.cntx=context; 
     this.array = arr; 

     } 

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

     public Object getItem(int position) 
     { 
     // TODO Auto-generated method stub 
     return array[position]; 
     } 

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

     public View getView(final int position, View convertView, ViewGroup parent) 
     { 
     View row=null; 
     LayoutInflater inflater=cntx.getLayoutInflater(); 
     row=inflater.inflate(R.layout.list, null); 

     DecimalFormat df = new DecimalFormat("#.##"); 
     final TextView title = (TextView)row.findViewById(R.id.title); 
     TextView tvcol1 = (TextView)row.findViewById(R.id.colortext01); 
     TextView tvcol2 = (TextView)row.findViewById(R.id.colortext02); 

     TextView gt  = (TextView)row.findViewById(R.id.text01); 
     TextView nt  = (TextView)row.findViewById(R.id.text02); 

     tvcol1.setHeight(grossheight[position]); 
     tvcol2.setHeight(netheight[position]); 
     title.setText(datelabel[position]); 

     gt.setText(df.format(grossSal[position]/1000)+" k"); 
     nt.setText(df.format(netSal[position]/1000)+" k"); 

     tvcol1.setOnClickListener(new OnClickListener() { 

      public void onClick(View v) { 
       Toast.makeText(SensorCharts.this, "Month/Year: "+title.getText().toString()+"\nGross Sal: "+grossSal[position], Toast.LENGTH_SHORT).show(); 
      } 
     }); 

     tvcol2.setOnClickListener(new OnClickListener() { 

      public void onClick(View v) { 
       Toast.makeText(SensorCharts.this, "Month/Year: "+title.getText().toString()+"\nNet Sal: "+netSal[position], Toast.LENGTH_SHORT).show(); 
      } 
     }); 

     return row; 
     } 
    } 

    @Override 
    public void onWindowFocusChanged(boolean hasFocus) { 
     // TODO Auto-generated method stub 
     super.onWindowFocusChanged(hasFocus); 
     updateSizeInfo(); 
    } 
    private void updateSizeInfo() { 

     /** This is onWindowFocusChanged method is used to allow the chart to 
     * update the chart according to the orientation. 
     * Here h is the integer value which can be updated with the orientation 
     */ 
     int h; 
     if(getResources().getConfiguration().orientation == 1) 
     { 
     h = (int) (lay.getHeight()*0.5); 
     if(h == 0) 
     { 
      h = 200; 
     } 
     } 
     else 
     { 
     h = (int) (lay.getHeight()*0.3); 
     if(h == 0) 
     { 
      h = 130; 
     } 
     } 
     for(int i=0;i<netSal.length;i++) 
     { 
     netheight[i] = (int)((h*netSal[i])/highest); 
     grossheight[i] = (int)((h*grossSal[i])/highest); 
     System.out.println("net width[i] "+netheight[i]+"gross width[i] "+grossheight[i]); 
     } 
     listview.setAdapter(new bsAdapter(this,datelabel)); 
    } 
} 

dieser Teil meiner xml ist ich, wo ich die horizontale Listenansicht haben

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
       android:orientation="vertical" 
       android:layout_width="match_parent" 
       android:layout_height="match_parent" 
       android:background="#fff" 
       android:id="@+id/linearlay"> 
    <TextView 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:padding="10dp" 
     android:textSize="16sp" 
     android:gravity="center" 
     android:layout_gravity="center" 
     android:textColor="#000" 
     android:text="Bar Chart with out any jar"/> 

    <RelativeLayout 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:padding="15dp" 
     android:background="#ddd" 
     android:orientation="horizontal"> 


     </RelativeLayout> 

      <com.xera.deviceinsight.home.HorizontalListView 
       android:id="@+id/listview" 
       android:layout_width="fill_parent" 
       android:layout_height="fill_parent" 
       android:background="#ddd" 
       /> 
    </LinearLayout> 

Answer 1

Try this Artikel zu lesen, die angibt, wie eine HorizontalListView verwenden.

Deklarieren Sie Ihre HorizontalListView in Ihrem XML und geben Sie ihr eine ID. Dann können Sie Ihr Element in Ihrer Java-Funktionalität verwenden.

EDIT:

Here Sie haben ein Tutorial darüber, wie leicht ein HorizontalListView implementieren. Wenn Sie eine speziellere Version wünschen, lesen Sie this.

Es gibt eine dritte Option, nämlich here, in der Sie alle Methoden von HorizontalListView implementieren und verwenden können (wie mRect, setX, setY, onClickListener ...).