在实际开拓种LayoutInflater这个类还长短常有用的,它的浸染雷同于 findViewById(),
差异点是LayoutInflater是用来找layout下xml机关文件，而且实例化！而findViewById()是找详细xml下的详细 widget控件(如:Button,TextView等)。
用法有两种：
LayoutInflater inflater = LayoutInflater.from(this); View view=inflater.inflate(R.layout.ID, null); 可能爽性并成一句： View view=LayoutInflater.from(this).inflate(R.layout.ID, null);另一种要领：
LayoutInflater inflater = (LayoutInflater)getSystemService(LAYOUT_INFLATER_SERVICE);
View view=inflater.inflate(R.layout.ID, null);
下面code为上例提到的MyAdapter 类的实现code
/* import相关class */
import java.io.File;
import java.util.List;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
/* 自界说的Adapter，担任android.widget.BaseAdapter */
public class MyAdapter extends BaseAdapter
{
/* 变量声明
mIcon1：回到根目次的图文件
mIcon2：回到上一层的图档
mIcon3：文件夹的图文件
mIcon4：文件的图档
*/
private LayoutInflater mInflater;
private Bitmap mIcon1;
private Bitmap mIcon2;
private Bitmap mIcon3;
private Bitmap mIcon4;
private List<String> items;
private List<String> paths;
/* MyAdapter的结构器，传入三个参数 */
public MyAdapter(Context context,List<String> it,List<String> pa)
{
/* 参数初始化 */
mInflater = LayoutInflater.from(context);
items = it;
paths = pa;
mIcon1 = BitmapFactory.decodeResource(context.getResources(),
R.drawable.back01);
mIcon2 = BitmapFactory.decodeResource(context.getResources(),
R.drawable.back02);
mIcon3 = BitmapFactory.decodeResource(context.getResources(),
R.drawable.folder);
mIcon4 = BitmapFactory.decodeResource(context.getResources(),
R.drawable.doc);
}
/* 因担任BaseAdapter，需包围以下要领 */
@Override
public int getCount()
{
return items.size();
}
@Override
public Object getItem(int position)
{
return items.get(position);
}
@Override
public long getItemId(int position)
{
return position;
}
@Override
public View getView(int position,View convertView,ViewGroup parent)
{
ViewHolder holder;
if(convertView == null)
{
/* 利用自界说的file_row作为Layout */
convertView = mInflater.inflate(R.layout.file_row, null);
/* 初始化holder的text与icon */
holder = new ViewHolder();
holder.text = (TextView) convertView.findViewById(R.id.text);
holder.icon = (ImageView) convertView.findViewById(R.id.icon);
convertView.setTag(holder);
}
else
{
holder = (ViewHolder) convertView.getTag();
}
File f=new File(paths.get(position).toString());
/* 配置[回到根目次]的文字与icon */
if(items.get(position).toString().equals("b1"))
{
holder.text.setText("Back to /");
holder.icon.setImageBitmap(mIcon1);
}
/* 配置[回到上一层]的文字与icon */
else if(items.get(position).toString().equals("b2"))
{
holder.text.setText("Back to ..");
holder.icon.setImageBitmap(mIcon2);
}
/* 配置[文件或文件夹]的文字与icon */
else
{
holder.text.setText(f.getName());
if(f.isDirectory())
{
holder.icon.setImageBitmap(mIcon3);
}
else
{
holder.icon.setImageBitmap(mIcon4);
}
}
return convertView;
}
/* class ViewHolder */
private class ViewHolder
{
TextView text;
ImageView icon;
}
}