兩種方法動態(tài)改變ListView布局

在getView()時，通過判斷選擇加載不同的布局。

點擊某個item的時候，變?yōu)閒oucus狀態(tài)，其他的items還原。

下面用兩個方法給item設(shè)置兩個不同的布局。

//foucus狀態(tài)，顯示一個ImageView
????private?View?addFocusView(int?i)?{
????????ImageView?iv?=?new?ImageView(mContext);
????????iv.setImageResource(R.drawable.ic_launcher);
????????return?iv;
????}
//normal狀態(tài)顯示一個ImageView和一個TextView
????private?View?addNormalView(int?i)?{
????????LinearLayout?layout?=?new?LinearLayout(mContext);
????????layout.setOrientation(LinearLayout.HORIZONTAL);
????????ImageView?iv?=?new?ImageView(mContext);
????????iv.setImageResource(R.drawable.ic);
????????layout.addView(iv,?new?LinearLayout.LayoutParams(
????????????????LinearLayout.LayoutParams.WRAP_CONTENT,
????????????????LinearLayout.LayoutParams.WRAP_CONTENT));
????????TextView?tv?=?new?TextView(mContext);
????????tv.setText(mData.get(i));
????????layout.addView(tv,?new?LinearLayout.LayoutParams(
????????????????LinearLayout.LayoutParams.WRAP_CONTENT,
????????????????LinearLayout.LayoutParams.WRAP_CONTENT));
????????layout.setGravity(Gravity.CENTER);
????????return?layout;
????}

?

FocusListViewAdapter.java

package?sunny.example.ahfourlistviewfocus;

import?android.content.Context;
import?android.view.Gravity;
import?android.view.View;
import?android.view.ViewGroup;
import?android.widget.BaseAdapter;
import?android.widget.ImageView;
import?android.widget.LinearLayout;
import?android.widget.TextView;

import?java.util.List;

public?class?FocusListViewAdapter?extends?BaseAdapter?{

????private?ListmData;
????private?Context?mContext;
????private?int?mCurrentItem?=?0;

????public?FocusListViewAdapter(Context?context,?Listdata)?{
????????this.mContext?=?context;
????????this.mData?=?data;
????}

????public?int?getCount()?{
????????return?mData.size();
????}

????public?Object?getItem(int?position)?{
????????return?mData.get(position);
????}

????public?long?getItemId(int?position)?{
????????return?position;
????}

????public?View?getView(int?position,?View?convertView,?ViewGroup?parent)?{
????????LinearLayout?layout?=?new?LinearLayout(mContext);
????????layout.setOrientation(LinearLayout.VERTICAL);
????????if?(mCurrentItem?==?position)?{
????????????layout.addView(addFocusView(position));
????????}?else?{
????????????layout.addView(addNormalView(position));
????????}
????????return?layout;
????}

????public?void?setCurrentItem(int?currentItem)?{
????????this.mCurrentItem?=?currentItem;
????}
//foucus狀態(tài)，顯示一個ImageView
????private?View?addFocusView(int?i)?{
????????ImageView?iv?=?new?ImageView(mContext);
????????iv.setImageResource(R.drawable.ic_launcher);
????????return?iv;
????}
//normal狀態(tài)顯示一個ImageView和一個TextView
????private?View?addNormalView(int?i)?{
????????LinearLayout?layout?=?new?LinearLayout(mContext);
????????layout.setOrientation(LinearLayout.HORIZONTAL);
????????ImageView?iv?=?new?ImageView(mContext);
????????iv.setImageResource(R.drawable.ic);
????????layout.addView(iv,?new?LinearLayout.LayoutParams(
????????????????LinearLayout.LayoutParams.WRAP_CONTENT,
????????????????LinearLayout.LayoutParams.WRAP_CONTENT));
????????TextView?tv?=?new?TextView(mContext);
????????tv.setText(mData.get(i));
????????layout.addView(tv,?new?LinearLayout.LayoutParams(
????????????????LinearLayout.LayoutParams.WRAP_CONTENT,
????????????????LinearLayout.LayoutParams.WRAP_CONTENT));
????????layout.setGravity(Gravity.CENTER);
????????return?layout;
????}
}

?

activity_main.xml

?

MainActivity.java

package?sunny.example.ahfourlistviewfocus;

import?android.support.v7.app.ActionBarActivity;
import?android.os.Bundle;
import?android.view.Menu;
import?android.view.MenuItem;
import?android.app.Activity;
import?android.os.Bundle;
import?android.view.View;
import?android.widget.AdapterView;
import?android.widget.ListView;

import?java.util.ArrayList;
import?java.util.List;

public?class?MainActivity?extends?ActionBarActivity?{

	@Override
	protected?void?onCreate(Bundle?savedInstanceState)?{
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		?ListView?listView?=?(ListView)?findViewById(R.id.focus_listView);
	????????Listdata?=?new?ArrayList();
	????????data.add("I?am?item?1");
	????????data.add("I?am?item?2");
	????????data.add("I?am?item?3");
	????????data.add("I?am?item?4");
	????????data.add("I?am?item?5");
	????????final?FocusListViewAdapter?adapter?=?new?FocusListViewAdapter(this,?data);
	??????
	????????/*?public?void?setAdapter?(ListAdapter?adapter)?
	???????Sets?the?data?behind?this?ListView.*/
	????????listView.setAdapter(adapter);
	????????listView.setOnItemClickListener(new?AdapterView.OnItemClickListener()?{
	????????????@Override
	????????????public?void?onItemClick(AdapterView?parent,?View?view,
	????????????????????????????????????int?position,?long?id)?{
	????????????????adapter.setCurrentItem(position);///
	????????????????/*void?android.widget.BaseAdapter.notifyDataSetChanged()
Notifies?the?attached?observers?that?the?underlying?data?has?been?changed?and?any?View?reflecting?the?data?set?should?refresh?itself.
*/				//刷新布局
	????????????????adapter.notifyDataSetChanged();
	????????????}
	????????});
	????}
	}	

foucus item3的情況