Android ViewFlow setFlowIndicator IndexOutOfBoundException

Question

我在Github上從pakerfeldt的ViewFlow類出現問題。

我正在嘗試製作'不同視圖視圖流程'。以下是我的活動代碼：

package com.suncco.silent_communities.activity; 

import org.taptwo.android.widget.TitleFlowIndicator; 
import org.taptwo.android.widget.ViewFlow; 

import android.app.Activity; 
import android.os.Bundle; 
import android.widget.ListView; 

import com.suncco.silent_communities.R; 

public class HousingActivity extends BaseActivity { 

private ViewFlow viewFlow; 
private ListView listView; 

/** Called when the activity is first created. */ 
@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.housing_activity); 
    initMenu(); 
    viewFlow = (ViewFlow) findViewById(R.id.viewflow); 
    DiffAdapter adapter = new DiffAdapter(this); 
    viewFlow.setAdapter(adapter); 
    TitleFlowIndicator indicator = (TitleFlowIndicator) findViewById(R.id.viewflowindic); 
    indicator.setTitleProvider(adapter); 
    viewFlow.setFlowIndicator(indicator); 

    /** To populate ListView in diff_view1.xml */ 
    // listView = (ListView) findViewById(R.id.listView1); 
    // String[] names = new String[] { "Cupcake", "Donut", "Eclair", 
    // "Froyo", 
    // "Gingerbread", "Honeycomb", "IceCream Sandwich" }; 
    // listView.setAdapter(new ArrayAdapter<String>(this, 
    // android.R.layout.simple_list_item_1, names)); 

    } 
} 

正如您所看到的，這與示例代碼非常相似。

這裏是適配器：

package com.suncco.silent_communities.view; 

import org.taptwo.android.widget.TitleProvider; 

import com.suncco.silent_communities.R; 

import android.content.Context; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.BaseAdapter; 

public class HousingViewflowAdapter extends BaseAdapter implements 
     TitleProvider { 

    private static final int VIEW1 = 0; 
    private static final int VIEW2 = 1; 
    private static final int VIEW_MAX_COUNT = VIEW2 + 1; 
    private final String[] names = { "View1", "View2" }; 

    private LayoutInflater mInflater; 

    public HousingViewflowAdapter(Context context) { 
     mInflater = (LayoutInflater) context 
       .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    } 

    @Override 
    public int getItemViewType(int position) { 
     return position; 
    } 

    @Override 
    public int getViewTypeCount() { 
     return VIEW_MAX_COUNT; 
    } 

    @Override 
    public int getCount() { 
     return 0; 
    } 

    @Override 
    public Object getItem(int position) { 
     return position; 
    } 

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

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
     int view = getItemViewType(position); 
     if (convertView == null) { 
      switch (view) { 
      case VIEW1: 
       convertView = mInflater.inflate(
         R.layout.housing_flowview_view1, null); 
       break; 
      case VIEW2: 
       convertView = mInflater.inflate(
         R.layout.housing_flowview_view2, null); 
       break; 
      } 
     } 
     return convertView; 
    } 

    /* 
    * (non-Javadoc) 
    * 
    * @see org.taptwo.android.widget.TitleProvider#getTitle(int) 
    */ 
    public String getTitle(int position) { 
     return names[position]; 
    } 

} 

而且類似例子，年底的觀點：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res/com.suncco.silent_communities" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="vertical" > 

    <LinearLayout 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:gravity="center_horizontal" 
     android:orientation="vertical" > 

     <org.taptwo.android.widget.TitleFlowIndicator 
      android:id="@+id/viewflowindic" 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:layout_marginTop="10dip" 
      app:clipPadding="5dp" 
      app:footerColor="#FFFFC445" 
      app:footerLineHeight="2dp" 
      app:footerTriangleHeight="10dp" 
      app:selectedColor="#FFFFC445" 
      app:selectedSize="12dp" 
      app:textColor="#FFFFFFFF" 
      app:textSize="11sp" 
      app:titlePadding="10dp" /> 
    </LinearLayout> 

    <org.taptwo.android.widget.ViewFlow 
     android:id="@+id/viewflow" 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     app:sidebuffer="5" /> 

</LinearLayout> 

在這裏，我的例外：

04-03 15:19:59.538: E/AndroidRuntime(1677): java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0 
04-03 15:19:59.538: E/AndroidRuntime(1677):  at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:257) 
04-03 15:19:59.538: E/AndroidRuntime(1677):  at java.util.ArrayList.get(ArrayList.java:311) 
04-03 15:19:59.538: E/AndroidRuntime(1677):  at org.taptwo.android.widget.TitleFlowIndicator.onDraw(TitleFlowIndicator.java:157) 
04-03 15:19:59.538: E/AndroidRuntime(1677):  at android.view.View.draw(View.java:6880) 
04-03 15:19:59.538: E/AndroidRuntime(1677):  at android.view.ViewGroup.drawChild(ViewGroup.java:1646) 
04-03 15:19:59.538: E/AndroidRuntime(1677):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373) 

是否有人知道什麼問題是？提前致謝。

Answer 1

@Override 
public int getItemViewType(int position) { 
    return position % 2; 
} 

希望這會有所幫助。你重寫的方法是返回精確值作爲位置。並且getCount方法返回0，它應該是基於您的DataProvider添加到ListView的元素數。您可以改爲返回names.length。