改变列表视图ListView中的字体和背景

Question

我想改变列表视图ListView中的字体(颜色和大小)和背景。我想用代码改变而不是想通过设置xml的属性实现。以下的list view看起来就像xml:

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="10dp"
android:textSize="18sp" android:text="@string/hello">

我的代码是：

public class NewsActivity  extends ListActivity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);

 // ArrayAdapter listItemAdapter = new ArrayAdapter( this,android.R.layout.simple_list_item_1, v_itemList );

      setListAdapter(new ArrayAdapter<String>(this, R.layout.list_item,ynetList));

      View v=getListView() ;

      ListView lv = getListView();

接下来再写什么代码呢？

Answer 1

你应该创建一个CustomListAdapter

private class CustomListAdapter extends ArrayAdapter {

    private Context mContext;
    private int id;
    private List <String>items ;

    public CustomListAdapter(Context context, int textViewResourceId , List<String> list ) 
    {
        super(context, textViewResourceId, list);           
        mContext = context;
        id = textViewResourceId;
        items = list ;
    }

    @Override
    public View getView(int position, View v, ViewGroup parent)
    {
        View mView = v ;
        if(mView == null){
            LayoutInflater vi = (LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            mView = vi.inflate(id, null);
        }

        TextView text = (TextView) mView.findViewById(R.id.textView);

        if(items.get(position) != null )
        {
            text.setTextColor(Color.WHITE);
            text.setText(items.get(position));
            text.setBackgroundColor(Color.RED); 
            int color = Color.argb( 200, 255, 64, 64 );
                text.setBackgroundColor( color );

        }

        return mView;
    }

}

list item应该向这样（custom_list.xml）

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content">
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:id="@+id/textView"
    android:textSize="20px" android:paddingTop="10dip" android:paddingBottom="10dip"/>
</LinearLayout>

listAdapter = new CustomListAdapter(YourActivity.this , R.layout.custom_list , mList);
mListView.setAdapter(listAdapter);