定制自己的ListView
自定义布局需要哪些东西？?
1、数据模型（数据）?
2、显示数据的组件?
?
3、重写BaseAdapter中的相关方法?
?
数据模型代码：
package cc.androidos.layout;public class RSS { private String title; public RSS(String title) { this.title = title; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } @Override public String toString() { return title; }}?
显示组件的布局代码：
<?xml version="1.0" encoding="utf-8"?><TableLayout android:id="@+id/tablelist" android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android"> <TableRow android:id="@+id/TableRow01" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TextView android:id="@+id/TextView1" android:layout_width="200px" android:layout_height="wrap_content" android:text="TextView1"></TextView> <ImageButton android:id="@+id/ImageButton01" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="80px"></ImageButton> </TableRow> </TableLayout>
?
这个Activity和重写BaseAdapter的代码：
package cc.androidos.layout;import java.util.ArrayList;import java.util.List;import android.app.Activity;import android.app.ListActivity;import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.Color;import android.os.Bundle;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageButton;import android.widget.ImageView;import android.widget.ListAdapter;import android.widget.Scroller;import android.widget.TextView;public class MyLayout extends ListActivity { //要被显示的数据模型 public static List<RSS> dataModel = new ArrayList<RSS>(); /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); getListView().setSelector(getResources().getDrawable(R.drawable.icon)); //将组定义的List组件加入到当前的Activity中 setListAdapter(new MyListAdapter(getApplicationContext())); dataModel.add(new RSS("title 1")); dataModel.add(new RSS("title 2")); dataModel.add(new RSS("title 3")); dataModel.add(new RSS("title 4")); } /*自定义布局组件中用于显示数据的组件类**/ public class ViewHolder { TextView mTextView; ImageButton mIcon; } // 自定义的布局组件 public class MyListAdapter extends BaseAdapter { private LayoutInflater mInflater = null; private Bitmap mIcon1 = null; private Bitmap mIcon2 = null; private Context mcContext = null; public MyListAdapter(Context context) { this.mcContext = context; mInflater = LayoutInflater.from(this.mcContext); mIcon1 = BitmapFactory.decodeResource(mcContext.getResources(), R.drawable.delete); mIcon2 = BitmapFactory.decodeResource(mcContext.getResources(), R.drawable.delete); } @Override public int getCount() { return dataModel.size(); } @Override public Object getItem(int position) { return dataModel.get(position); } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { String tag = "getView"; final ViewHolder holder; if (convertView == null) { //使用XML文件填充整个布局 convertView = mInflater.inflate(R.layout.list, null); holder = new ViewHolder();//生成存放数据的组件模型 holder.mTextView = (TextView) convertView .findViewById(R.id.TextView1); holder.mIcon = (ImageButton) convertView .findViewById(R.id.ImageButton01); convertView.setTag(holder);//将存放数据的组件模型加入到整个View视图中 } else { holder = (ViewHolder) convertView.getTag(); } Log.d(tag, "start get View....."); holder.mTextView.setText(dataModel.get(position).toString()); holder.mIcon.setImageBitmap((position & 1) == 1 ? mIcon1 : mIcon2); holder.mIcon.setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View v) {//设置按钮点击事件 holder.mTextView.setBackgroundColor(Color.WHITE); holder.mIcon.setVisibility(View.VISIBLE); } }); return convertView; } }}?
这样自定义完成后，显示数据将会有一个图片和一个字符串放在ListActivity中每项中