Android提高十八篇之自定义Menu(TabMenu)
用过UCWEB-Android版的人都应该对其特殊的menu有印象,把menu做成Tab-Menu(支持分页的Menu),可以容纳比Android传统的menu更丰富的内容(Android的menu超过6项则缩略在[更多]里),本文参考网上的例子(作者:CoffeeCole,email:[email protected]) ,对例子进行简化以及封装,使其作为一个复合控件融入自己的framework。
先来看看本文程序运行的效果:
TabMenu 本身就是一个PopupWindow,PopupWindow上面放了两个GridView,第一个GridView就是分页标签,位于 PopupWindow的顶部,第二个GridView是菜单,位于PopupWindow的主体。为了实现PopupWindow的弹出/退出的动画效 果,本文使用了以下代码:
在工程的res文件夹里添加anim子目录,再新建文件popup_enter.xml:
- <? xml version = "1.0" encoding = "utf-8" ?>
- < set xmlns:android = "http://schemas.android.com/apk/res/android" >
- < translate android:fromYDelta = "100%p" android:toYDelta = "0" android:duration = "1000" />
- < alpha android:fromAlpha = "0.0" android:toAlpha = "1.0" android:duration = "1000" />
- </ set >
新建文件popup_exit.xml:
- <? xml version = "1.0" encoding = "utf-8" ?>
- < set xmlns:android = "http://schemas.android.com/apk/res/android" >
- < translate android:fromYDelta = "0" android:toYDelta = "100%p" android:duration = "1000" />
- < alpha android:fromAlpha = "1.0" android:toAlpha = "0.0" android:duration = "1000" />
- </ set >
在工程的values文件夹里新建文件popup_animation.xml:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="PopupAnimation" parent="android:Animation">
<item name="android:windowEnterAnimation">@anim/popup_enter</item>
<item name="android:windowExitAnimation">@anim/popup_exit</item>
</style>
</resources>
main.xml的源码如下:
- <? xml version = "1.0" encoding = "utf-8" ?>
- < LinearLayout android:id = "@+id/LinearLayout01"
- android:layout_width = "fill_parent" android:layout_height = "fill_parent"
- xmlns:android = "http://schemas.android.com/apk/res/android" >
- < TextView android:id = "@+id/TextView01" android:layout_height = "wrap_content"
- android:layout_width = "fill_parent" android:text = "扩展Menu----hellogv" > </ TextView >
- </ LinearLayout >
<?xml version="1.0" encoding="utf-8"?> <LinearLayout android:id="@+id/LinearLayout01" android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android"> <TextView android:id="@+id/TextView01" android:layout_height="wrap_content" android:layout_width="fill_parent" android:text="扩展Menu----hellogv"></TextView> </LinearLayout>
TabMenu的封装类TabMenu.java的源码如下:
- package com.testTabMenu;
- import android.content.Context;
- import android.graphics.Color;
- import android.graphics.drawable.ColorDrawable;
- import android.view.Gravity;
- import android.view.View;
- import android.view.ViewGroup;
- import android.widget.BaseAdapter;
- import android.widget.GridView;
- import android.widget.ImageView;
- import android.widget.LinearLayout;
- import android.widget.PopupWindow;
- import android.widget.TextView;
- import android.widget.AdapterView.OnItemClickListener;
- import android.widget.LinearLayout.LayoutParams;
- public class TabMenu extends PopupWindow{
- private GridView gvBody, gvTitle;
- private LinearLayout mLayout;
- private MenuTitleAdapter titleAdapter;
- public TabMenu(Context context,OnItemClickListener titleClick,OnItemClickListener bodyClick,
- MenuTitleAdapter titleAdapter,int colorBgTabMenu, int aniTabMenu){
- super (context);
- mLayout = new LinearLayout(context);
- mLayout.setOrientation(LinearLayout.VERTICAL);
- //标题选项栏
- gvTitle = new GridView(context);
- gvTitle.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
- gvTitle.setNumColumns(titleAdapter.getCount());
- gvTitle.setStretchMode(GridView.STRETCH_COLUMN_WIDTH);
- gvTitle.setVerticalSpacing(1 );
- gvTitle.setHorizontalSpacing(1 );
- gvTitle.setGravity(Gravity.CENTER);
- gvTitle.setOnItemClickListener(titleClick);
- gvTitle.setAdapter(titleAdapter);
- gvTitle.setSelector(new ColorDrawable(Color.TRANSPARENT)); //选中的时候为透明色
- this .titleAdapter=titleAdapter;
- //子选项栏
- gvBody = new GridView(context);
- gvBody.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT));
- gvBody.setSelector(new ColorDrawable(Color.TRANSPARENT)); //选中的时候为透明色
- gvBody.setNumColumns(4 );
- gvBody.setStretchMode(GridView.STRETCH_COLUMN_WIDTH);
- gvBody.setVerticalSpacing(10 );
- gvBody.setHorizontalSpacing(10 );
- gvBody.setPadding(10 , 10 , 10 , 10 );
- gvBody.setGravity(Gravity.CENTER);
- gvBody.setOnItemClickListener(bodyClick);
- mLayout.addView(gvTitle);
- mLayout.addView(gvBody);
- //设置默认项
- this .setContentView(mLayout);
- this .setWidth(LayoutParams.FILL_PARENT);
- this .setHeight(LayoutParams.WRAP_CONTENT);
- this .setBackgroundDrawable( new ColorDrawable(colorBgTabMenu)); // 设置TabMenu菜单背景
- this .setAnimationStyle(aniTabMenu);
- this .setFocusable( true ); // menu菜单获得焦点 如果没有获得焦点menu菜单中的控件事件无法响应
- }
- public void SetTitleSelect( int index)
- {
- gvTitle.setSelection(index);
- this .titleAdapter.SetFocus(index);
- }
- public void SetBodySelect( int index, int colorSelBody)
- {
- int count=gvBody.getChildCount();
- for ( int i= 0 ;i<count;i++)
- {
- if (i!=index)
- ((LinearLayout)gvBody.getChildAt(i)).setBackgroundColor(Color.TRANSPARENT);
- }
- ((LinearLayout)gvBody.getChildAt(index)).setBackgroundColor(colorSelBody);
- }
- public void SetBodyAdapter(MenuBodyAdapter bodyAdapter)
- {
- gvBody.setAdapter(bodyAdapter);
- }
- /**
- * 自定义Adapter,TabMenu的每个分页的主体
- *
- */
- static public class MenuBodyAdapter extends BaseAdapter {
- private Context mContext;
- private int fontColor,fontSize;
- private String[] texts;
- private int [] resID;
- /**
- * 设置TabMenu的分页主体
- * @param context 调用方的上下文
- * @param texts 按钮集合的字符串数组
- * @param resID 按钮集合的图标资源数组
- * @param fontSize 按钮字体大小
- * @param color 按钮字体颜色
- */
- public MenuBodyAdapter(Context context, String[] texts, int [] resID, int fontSize, int fontColor)
- {
- this .mContext = context;
- this .fontColor = fontColor;
- this .texts = texts;
- this .fontSize=fontSize;
- this .resID=resID;
- }
- public int getCount() {
- return texts.length;
- }
- public Object getItem( int position) {
- return makeMenyBody(position);
- }
- public long getItemId( int position) {
- return position;
- }
- private LinearLayout makeMenyBody( int position)
- {
- LinearLayout result=new LinearLayout( this .mContext);
- result.setOrientation(LinearLayout.VERTICAL);
- result.setGravity(Gravity.CENTER_HORIZONTAL|Gravity.CENTER_VERTICAL);
- result.setPadding(10 , 10 , 10 , 10 );
- TextView text = new TextView( this .mContext);
- text.setText(texts[position]);
- text.setTextSize(fontSize);
- text.setTextColor(fontColor);
- text.setGravity(Gravity.CENTER);
- text.setPadding(5 , 5 , 5 , 5 );
- ImageView img=new ImageView( this .mContext);
- img.setBackgroundResource(resID[position]);
- result.addView(img,new LinearLayout.LayoutParams( new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT)));
- result.addView(text);
- return result;
- }
- public View getView( int position, View convertView, ViewGroup parent) {
- return makeMenyBody(position);
- }
- }
- /**
- * 自定义Adapter,TabMenu的分页标签部分
- *
- */
- static public class MenuTitleAdapter extends BaseAdapter {
- private Context mContext;
- private int fontColor,unselcolor,selcolor;
- private TextView[] title;
- /**
- * 设置TabMenu的title
- * @param context 调用方的上下文
- * @param titles 分页标签的字符串数组
- * @param fontSize 字体大小
- * @param fontcolor 字体颜色
- * @param unselcolor 未选中项的背景色
- * @param selcolor 选中项的背景色
- */
- public MenuTitleAdapter(Context context, String[] titles, int fontSize,
- int fontcolor, int unselcolor, int selcolor) {
- this .mContext = context;
- this .fontColor = fontcolor;
- this .unselcolor = unselcolor;
- this .selcolor=selcolor;
- this .title = new TextView[titles.length];
- for ( int i = 0 ; i < titles.length; i++) {
- title[i] = new TextView(mContext);
- title[i].setText(titles[i]);
- title[i].setTextSize(fontSize);
- title[i].setTextColor(fontColor);
- title[i].setGravity(Gravity.CENTER);
- title[i].setPadding(10 , 10 , 10 , 10 );
- }
- }
- public int getCount() {
- return title.length;
- }
- public Object getItem( int position) {
- return title[position];
- }
- public long getItemId( int position) {
- return title[position].getId();
- }
- /**
- * 设置选中的效果
- */
- private void SetFocus( int index)
- {
- for ( int i= 0 ;i<title.length;i++)
- {
- if (i!=index)
- {
- title[i].setBackgroundDrawable(new ColorDrawable(unselcolor)); //设置没选中的颜色
- title[i].setTextColor(fontColor);//设置没选中项的字体颜色
- }
- }
- title[index].setBackgroundColor(0x00 ); //设置选中项的颜色
- title[index].setTextColor(selcolor);//设置选中项的字体颜色
- }
- public View getView( int position, View convertView, ViewGroup parent) {
- View v;
- if (convertView == null ) {
- v = title[position];
- } else {
- v = convertView;
- }
- return v;
- }
- }
- }
testTabMenu介绍了数据的定义以及TabMenu的使用,源码如下:
- package com.testTabMenu;
- import android.app.Activity;
- import android.graphics.Color;
- import android.os.Bundle;
- import android.view.Gravity;
- import android.view.Menu;
- import android.view.View;
- import android.widget.AdapterView;
- import android.widget.AdapterView.OnItemClickListener;
- import android.widget.Toast;
- public class testTabMenu extends Activity {
- TabMenu.MenuBodyAdapter []bodyAdapter=new TabMenu.MenuBodyAdapter[ 3 ];
- TabMenu.MenuTitleAdapter titleAdapter;
- TabMenu tabMenu;
- int selTitle= 0 ;
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super .onCreate(savedInstanceState);
- setContentView(R.layout.main);
- //设置分页栏的标题
- titleAdapter = new TabMenu.MenuTitleAdapter( this , new String[] { "常用" ,
- "设置" , "工具" }, 16 , 0xFF222222 ,Color.LTGRAY,Color.WHITE);
- //定义每项分页栏的内容
- bodyAdapter[0 ]= new TabMenu.MenuBodyAdapter( this , new String[] { "常用1" , "常用2" , },
- new int [] { R.drawable.menu_test,
- R.drawable.menu_bookmark},13 , 0xFFFFFFFF );
- bodyAdapter[1 ]= new TabMenu.MenuBodyAdapter( this , new String[] { "设置1" , "设置2" ,
- "设置3" }, new int [] { R.drawable.menu_edit,
- R.drawable.menu_delete, R.drawable.menu_fullscreen},13 , 0xFFFFFFFF );
- bodyAdapter[2 ]= new TabMenu.MenuBodyAdapter( this , new String[] { "工具1" , "工具2" ,
- "工具3" , "工具4" }, new int [] { R.drawable.menu_copy,
- R.drawable.menu_cut, R.drawable.menu_normalmode,
- R.drawable.menu_quit },13 , 0xFFFFFFFF );
- tabMenu=new TabMenu( this ,
- new TitleClickEvent(),
- new BodyClickEvent(),
- titleAdapter,
- 0x55123456 , //TabMenu的背景颜色
- R.style.PopupAnimation);//出现与消失的动画
- tabMenu.update();
- tabMenu.SetTitleSelect(0 );
- tabMenu.SetBodyAdapter(bodyAdapter[0 ]);
- }
- class TitleClickEvent implements OnItemClickListener{
- @Override
- public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
- long arg3) {
- selTitle=arg2;
- tabMenu.SetTitleSelect(arg2);
- tabMenu.SetBodyAdapter(bodyAdapter[arg2]);
- }
- }
- class BodyClickEvent implements OnItemClickListener{
- @Override
- public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
- long arg3) {
- tabMenu.SetBodySelect(arg2,Color.GRAY);
- String str="第" +String.valueOf(selTitle)+ "栏\n\r"
- +"第" +String.valueOf(arg2)+ "项" ;
- Toast.makeText(testTabMenu.this , str, 500 ).show();
- }
- }
- @Override
- /**
- * 创建MENU
- */
- public boolean onCreateOptionsMenu(Menu menu) {
- menu.add("menu" ); // 必须创建一项
- return super .onCreateOptionsMenu(menu);
- }
- @Override
- /**
- * 拦截MENU
- */
- public boolean onMenuOpened( int featureId, Menu menu) {
- if (tabMenu != null ) {
- if (tabMenu.isShowing())
- tabMenu.dismiss();
- else {
- tabMenu.showAtLocation(findViewById(R.id.LinearLayout01),
- Gravity.BOTTOM, 0 , 0 );
- }
- }
- return false ; // 返回为true 则显示系统menu
- }
-
}