2013-02-27 53 views
0

我知道這個問題在許多帖子中仍然有答案。理論上我知道答案,但在這種情況下,我無法得到它的工作。在ListView中以編程方式插入自定義LinearLayout

我有一個自定義BaseAdapter

@Override 
public Row getView(int position, View convertView, ViewGroup parent) 
{ 
    ... 

    Row view = (Row) convertView; 
    LayoutInflater mInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE); 

    if (view == null) 
    { 
     view = (JVxDataRow) mInflater.inflate(R.layout.row_base, null);; 
     ... 
    } 
    ... 
} 
    return view; 
} 

這工作得很好,在row_base.xml充氣正確的,並且我的列表視圖中得到的所有條目。 的row_base.xml只包括:

<?xml version="1.0" encoding="utf-8"?> 
<mh.android.ui.Row 
xmlns:android="http://schemas.android.com/apk/res/android" 
android:id="@+id/datarow" 
android:layout_width="match_parent" 
android:layout_height="wrap_content" 
android:paddingLeft="20dp" 
android:paddingTop="20dp" 
android:paddingBottom="20dp" 
android:paddingRight="20dp" /> 

因此我想刪除該文件,而是實例化這個程序。 我的代碼 - 不工作 - 是如下:

@Override 
public Row getView(int position, View convertView, ViewGroup parent) 
{ 
    ... 

    Row view = (Row) convertView; 
    LayoutInflater mInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE); 

    if (view == null) 
    { 
     view = new Row(context); 
     ... 
    } 
    ... 
} 
    return view; 
} 

得到它的工作,我必須把一些layoutparameters在該行的構造函數和移動從onFinishInflate的充氣的構造器:

public Row(Context context) 
{ 
    super(context); 
    AbsListView.LayoutParams params = new AbsListView.LayoutParams(AbsListView.LayoutParams.WRAP_CONTENT, AbsListView.LayoutParams.WRAP_CONTENT); 

    this.setLayoutParams(params); 
    this.setPadding(20, 20, 20, 20); 
    this.setOrientation(LinearLayout.VERTICAL); 

    inflater = (LayoutInflater) this.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    container = inflater.inflate(R.layout.datarow3, this, true); 

    this.addView(container); 
} 

的datarow3.xml看起來:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:id="@+id/table_row_container" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:orientation="vertical" > 

<mh.android.ui.DataItem 
    android:id="@+id/dataitem_slot1" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:singleLine="true" > 
</mh.android.ui.DataItem> 
<mh.android.ui.DataItem 
    android:id="@+id/dataitem_slot2" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:singleLine="true" > 
</mh.android.ui.DataItem> 
</LinearLayout> 

的問題是在BaseAdapter當我從膨脹的XML以編程實例化改變,該列表視圖在LinearLayout中。

現在例外:

E/AndroidRuntime(13203): FATAL EXCEPTION: main 
E/AndroidRuntime(13203): java.lang.ClassCastException:  android.widget.LinearLayout$LayoutParams cannot be cast to android.widget.AbsListView$LayoutParams 
E/AndroidRuntime(13203): at android.widget.ListView.measureScrapChild(ListView.java:1170) 
E/AndroidRuntime(13203): at android.widget.ListView.measureHeightOfChildren(ListView.java:1252) 
E/AndroidRuntime(13203): at android.widget.ListView.onMeasure(ListView.java:1162) 
E/AndroidRuntime(13203): at android.view.View.measure(View.java:15288) 
E/AndroidRuntime(13203): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4876) 
E/AndroidRuntime(13203): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1396) 
E/AndroidRuntime(13203): at android.widget.LinearLayout.measureVertical(LinearLayout.java:681) 
E/AndroidRuntime(13203): at android.widget.LinearLayout.onMeasure(LinearLayout.java:574) 
E/AndroidRuntime(13203): at android.view.View.measure(View.java:15288) 
E/AndroidRuntime(13203): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4876) 
E/AndroidRuntime(13203): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 
E/AndroidRuntime(13203): at android.view.View.measure(View.java:15288) 
E/AndroidRuntime(13203): at android.widget.LinearLayout.measureVertical(LinearLayout.java:833) 
E/AndroidRuntime(13203): at android.widget.LinearLayout.onMeasure(LinearLayout.java:574) 
E/AndroidRuntime(13203): at android.view.View.measure(View.java:15288) 
E/AndroidRuntime(13203): at 

什麼錯呢? 謝謝!

回答

1

爲什麼所有評論都沒有了? 我的問題的解決方案:

container = inflater.inflate(R.layout.datarow3, this, true); 
this.addView(container); 

改爲

inflater.inflate(R.layout.datarow3, this, true); 

佈局不需要被添加在它充氣。

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