Android仿人人客户端（v5.7.1）——点击左侧菜单栏中的Item切换视图

转载请标明出处：/article/7738563.html
在前面几讲中，左侧菜单（左侧面板）、满足滑动或点击子View的方式，打开左侧菜单的父容器和新鲜事视图（雏形）已基本完成，这一篇我们将主界面的整个视图框架完善下，实现点击左侧菜单切换右侧视图的功能。

一、添加消息中心视图

通过观察，发现消息中心与新鲜事视图的顶部导航栏（工具栏）非常类似，既然类似就自定义组件，在两个视图需要用到的位置包含进去就可以了，降低代码冗余度。

顶部导航栏的布局文件（top_menu_navbar.xml）：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >

<LinearLayout
android:id="@+id/ll_back"
android:layout_width="60dip"
android:layout_height="fill_parent"
android:background="@drawable/v5_0_1_flipper_head_title_wrapper_background"
android:gravity="center_vertical" >

<ImageView
android:id="@+id/iv_back"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="15dip"
android:src="@drawable/v5_0_1_flipper_head_flip" />
</LinearLayout>

<ImageView
android:id="@+id/iv_line_separator"
android:layout_width="1dip"
android:layout_height="25dip"
android:layout_centerVertical="true"
android:layout_toRightOf="@+id/ll_back"
android:background="@drawable/v5_0_1_flipper_head_separator" />

<LinearLayout
android:id="@+id/ll_down_list"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_marginLeft="5dip"
android:layout_toRightOf="@+id/iv_line_separator"
android:background="@drawable/v5_0_1_flipper_head_title_wrapper_background" >

<TextView
android:id="@+id/tv_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginLeft="5dip"
android:text="新鲜事"
android:textColor="#FFFFFF"
android:textSize="17dip"
android:textStyle="bold" />

<ImageView
android:id="@+id/iv_down_list_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:layout_marginBottom="3dip"
android:layout_marginLeft="5dip"
android:layout_marginRight="5dip"
android:src="@drawable/v5_0_1_flipper_head_title_corner" />
</LinearLayout>

<ImageView
android:id="@+id/iv_right_line"
android:layout_width="1dip"
android:layout_height="25dip"
android:layout_centerVertical="true"
android:layout_toLeftOf="@+id/ll_refresh"
android:background="@drawable/v5_0_1_flipper_head_separator" />

<LinearLayout
android:id="@+id/ll_refresh"
android:layout_width="60dip"
android:layout_height="fill_parent"
android:layout_alignParentRight="true"
android:background="@drawable/v5_0_1_flipper_head_title_wrapper_background"
android:gravity="center" >

<TextView
android:id="@+id/tv_right_operation_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginLeft="5dip"
android:text="编辑"
android:textColor="#FFFFFF"
android:textSize="17dip"
android:textStyle="bold" />

<ImageView
android:id="@+id/iv_refresh"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/refresh_icon" />
</LinearLayout>

</RelativeLayout>

顶部导航栏的Java文件：

package com.everyone.android.widget;

import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;

import com.everyone.android.R;
import com.everyone.android.api.OnMenuClickListener;

/**
* 功能描述：自定义顶部菜单栏
* @author android_ls
*/
public class TopMenuNavbar extends FrameLayout {

// 打开左侧菜单的组件
private LinearLayout llShowMenu;

/**
* 下拉列表
*/
public LinearLayout mLlDownList;

/**
* 当前的标题
*/
public TextView tvTitle;

/**
* 下拉标识
*/
public ImageView ivDownListIcon;

/**
* 刷新图标
*/
public ImageView ivRefresh;

/**
* 右侧操作（动作）的名称
*/
public TextView tvRightOperationName;

/**
* 右侧竖直分割线
*/
public ImageView ivRightLine;

/**
* 右侧的操作触控组件
*/
public LinearLayout mLlRefresh;

/**
* 打开左侧菜单的组件的事件监听器
*/
private OnMenuClickListener mOnClickListener;

public TopMenuNavbar(Context context) {
super(context);
setupViews();
}

public TopMenuNavbar(Context context, AttributeSet attrs) {
super(context, attrs);
setupViews();
}

public void setOnClickListener(OnMenuClickListener onClickListener) {
mOnClickListener = onClickListener;
}

private void setupViews() {
final LayoutInflater mLayoutInflater = LayoutInflater.from(getContext());
RelativeLayout rlTopNavbar = (RelativeLayout) mLayoutInflater.inflate(R.layout.top_menu_navbar, null);
addView(rlTopNavbar);

llShowMenu = (LinearLayout) rlTopNavbar.findViewById(R.id.ll_back);
mLlDownList = (LinearLayout) rlTopNavbar.findViewById(R.id.ll_down_list);
mLlRefresh = (LinearLayout) rlTopNavbar.findViewById(R.id.ll_refresh);

tvTitle = (TextView) rlTopNavbar.findViewById(R.id.tv_title);
tvRightOperationName = (TextView) rlTopNavbar.findViewById(R.id.tv_right_operation_name);
ivDownListIcon = (ImageView) rlTopNavbar.findViewById(R.id.iv_down_list_icon);
ivRefresh = (ImageView) rlTopNavbar.findViewById(R.id.iv_refresh);
ivRightLine = (ImageView) rlTopNavbar.findViewById(R.id.iv_right_line);

llShowMenu.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
if (mOnClickListener != null) {
mOnClickListener.onClick();
}
}
});
}

}

消息中心视图的布局文件（message.xml）：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#FFFFFF"
android:orientation="vertical" >

<com.everyone.android.widget.TopMenuNavbar
android:id="@+id/rl_top_menu_navbar"
style="@style/top_navbar" />

</LinearLayout>

消息中心视图的Java文件：

package com.everyone.android.widget;

import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.FrameLayout;
import android.widget.LinearLayout;

import com.everyone.android.R;

/**
* 功能描述：消息中心视图
* @author android_ls
*/
public class MessageLayout extends FrameLayout implements OnClickListener {

private TopMenuNavbar topMenuNavbar;

public TopMenuNavbar getTopMenuNavbar() {
return topMenuNavbar;
}

public MessageLayout(Context context) {
super(context);
setupViews();
}

public MessageLayout(Context context, AttributeSet attrs) {
super(context, attrs);
setupViews();
}

private void setupViews() {
final LayoutInflater mLayoutInflater = LayoutInflater.from(getContext());
LinearLayout rlTopNavbar = (LinearLayout) mLayoutInflater.inflate(R.layout.message, null);
addView(rlTopNavbar);

topMenuNavbar = (TopMenuNavbar) rlTopNavbar.findViewById(R.id.rl_top_menu_navbar);
topMenuNavbar.mLlRefresh.setOnClickListener(this);

topMenuNavbar.tvTitle.setText("消息中心");
topMenuNavbar.ivDownListIcon.setVisibility(View.GONE);
topMenuNavbar.ivRefresh.setVisibility(View.GONE);

}

@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.ll_refresh:

break;
default:
break;
}

}

}

二、修改新鲜事视图

修改后的新鲜事视图布局文件（fresh_news.xml）：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#FFFFFF"
android:orientation="vertical" >

<com.everyone.android.widget.TopMenuNavbar
android:id="@+id/rl_top_menu_navbar"
style="@style/top_navbar" />

</LinearLayout>

修改后的新鲜事视图的Java文件：

package com.everyone.android.widget;

import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.FrameLayout;
import android.widget.LinearLayout;

import com.everyone.android.R;

/**
* 功能描述：新鲜事视图
* @author android_ls
*/
public class FreshNewsLayout extends FrameLayout implements OnClickListener {

private TopMenuNavbar topMenuNavbar;

public TopMenuNavbar getTopMenuNavbar() {
return topMenuNavbar;
}

public FreshNewsLayout(Context context) {
super(context);
setupViews();
}

public FreshNewsLayout(Context context, AttributeSet attrs) {
super(context, attrs);
setupViews();
}

private void setupViews() {
final LayoutInflater mLayoutInflater = LayoutInflater.from(getContext());
LinearLayout rlTopNavbar = (LinearLayout) mLayoutInflater.inflate(R.layout.fresh_news, null);
addView(rlTopNavbar);

topMenuNavbar = (TopMenuNavbar) rlTopNavbar.findViewById(R.id.rl_top_menu_navbar);
topMenuNavbar.mLlDownList.setOnClickListener(this);
topMenuNavbar.mLlRefresh.setOnClickListener(this);
topMenuNavbar.ivRightLine.setVisibility(View.GONE);
topMenuNavbar.tvRightOperationName.setVisibility(View.GONE);

}

@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.ll_down_list:

break;
case R.id.ll_refresh:

break;
default:
break;
}

}

}

三、左侧菜单栏添加选中的Item事件监听器

点击左侧菜单中某个组的Item后，要实现切换父容器中的视图，那么左侧菜单对象就得持有父容器（我们自定义的满足滑动显示或隐藏左侧菜单的ViewGroup）和各个视图的引用。这样，等于左侧菜单与父容器和各个要切换的视图都关联起来了，也就是左侧菜单与其它对象的耦合度高了，编写代码也变得复杂。如果硬要这么做，有错吗？没有。不过我不想这么写，在左侧菜单类添加接口，将每次用户单击的Item的位置信息传到外部。我们让主界面Activity类去实现该接口，完成左侧菜单抛出去的要响应的事件。（这块不是很好描述，或者是我表达能力的问题吧。）

在父容器（ScrollerContainer）中添加切换视图的方法：

/**
* 切换视图
* @param view
*/
public void show(View view) {
mPanelInvisible = false;

int scrollX = getChildAt(1).getScrollX();
mScroller.startScroll(scrollX, 0, -scrollX, 0, ANIMATION_DURATION_TIME);
invalidate();

removeViewAt(1);
addView(view, 1, getLayoutParams());
}

对外的接口：

/**
* 设置选中的Item事件监听器
* @param seletedListener
*/
public void setOnSeletedListener(onSeletedListener seletedListener) {
mOnSeletedListener = seletedListener;
}

/**
* 选中的Item事件监听器
* @author android_ls
*/
public interface onSeletedListener {
/**
* 当前选中的Item事件处理器
* @param groupPosition 所属组Id
* @param childPosition 在所属组内的位置
*/
public abstract void seletedChildView(int groupPosition, int childPosition);
}

组的Item单击事件监听器：

mExpandableListView.setOnChildClickListener(new OnChildClickListener() {

@Override
public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
if (mOnSeletedListener == null) {
return false;
}

mGroupPosition = groupPosition;
mChildPosition = childPosition;

mOnSeletedListener.seletedChildView(groupPosition, childPosition);
return true;
}
});

左侧菜单修改后的完整源码：

package com.everyone.android.widget;

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

import android.content.Context;
import android.content.res.Resources;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ExpandableListView;
import android.widget.ExpandableListView.OnChildClickListener;
import android.widget.ExpandableListView.OnGroupClickListener;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.everyone.android.R;
import com.everyone.android.adapter.LeftPanelExListViewAdapter;
import com.everyone.android.entity.LeftPanelListItem;

/**
* 功能描述：仿人人主界面之左侧面板
* @author android_ls
*
*/
public class LeftPanelLayout extends FrameLayout {

/**
* 用户图标显示组件
*/
public ImageView ivUserIcon;

/**
* 用户名称显示组件
*/
public TextView tvNickname;

/**
* 可展开的ListView组件
*/
private ExpandableListView mExpandableListView;

/**
* ExpandableListView组件的数据适配器
*/
private LeftPanelExListViewAdapter mExListViewAdapter;

/**
* ExpandableListView组件的数据源
*/
private List<LeftPanelListItem> mListItems = new ArrayList<LeftPanelListItem>();

/**
* 分组名数组
*/
private String[] mGroupNames;

private onSeletedListener mOnSeletedListener;

private int mGroupPosition;

private int mChildPosition;

public LeftPanelLayout(Context context) {
super(context);
setupViews();
}

public LeftPanelLayout(Context context, AttributeSet attrs) {
super(context, attrs);
setupViews();
}

private void setupViews() {
final LayoutInflater mInflater = LayoutInflater.from(getContext());
LinearLayout viewRoot = (LinearLayout) mInflater.inflate(R.layout.left_panel, null);
addView(viewRoot);

ivUserIcon = (ImageView) viewRoot.findViewById(R.id.iv_user_icon);
tvNickname = (TextView) viewRoot.findViewById(R.id.tv_nickname);
mExpandableListView = (ExpandableListView) viewRoot.findViewById(R.id.elv_list_view);

initialized();
}

private void initialized() {
Resources resources = this.getResources();
mGroupNames = resources.getStringArray(R.array.left_panel_group_names);

String[] firstGroupNames = resources.getStringArray(R.array.left_panel_first_group_names);
String[] secondGroupNames = resources.getStringArray(R.array.left_panel_second_group_names);
String[] threeGroupNames = resources.getStringArray(R.array.left_panel_group_three_names);

int[] firstGroupIcons = {
R.drawable.left_panel_item_newsfeed_icon_selector,
R.drawable.left_panel_item_message_icon_selector,
R.drawable.left_panel_item_chat_icon_selector,
R.drawable.left_panel_item_friends_icon_selector,
R.drawable.left_panel_item_search_icon_selector };

int[] secondGroupIcons = {
R.drawable.left_panel_item_location_icon_selector,
R.drawable.left_panel_item_mainpage_icon_selector,
R.drawable.left_panel_item_hot_icon_selector,
R.drawable.left_panel_item_apps_icon_selector };

int[] threeGroupIcons = {
R.drawable.left_panel_item_settings_icon_selector,
R.drawable.left_panel_item_layout_icon_selector };

addGroup(0, firstGroupNames, firstGroupIcons);
addGroup(1, secondGroupNames, secondGroupIcons);
addGroup(2, threeGroupNames, threeGroupIcons);

mExListViewAdapter = new LeftPanelExListViewAdapter(getContext(), mListItems);
mExpandableListView.setAdapter(mExListViewAdapter);

// 设置默认让所有组都展开
for (int i = 0; i < mListItems.size(); i++) {
mExpandableListView.expandGroup(i);
}

// 设置OnGroupClick时，不再展开或收缩组内的子项
mExpandableListView.setOnGroupClickListener(new OnGroupClickListener() {

@Override
public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {
// 表示GroupItem的单击事件已被处理
return true;
}

});

mExpandableListView.setOnChildClickListener(new OnChildClickListener() {

@Override
public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
if (mOnSeletedListener == null) {
return false;
}

mGroupPosition = groupPosition;
mChildPosition = childPosition;

mOnSeletedListener.seletedChildView(groupPosition, childPosition);
return true;
}
});
}

/**
* 添加数据到指定的组
* @param groupId 组ID
* @param names 子项的名字数组
* @param icons 子项的图标数组
*/
private void addGroup(int groupId, String[] names, int[] icons) {
LeftPanelListItem listItem = new LeftPanelListItem();
listItem.setId(groupId);
listItem.setName(mGroupNames[groupId]);
// 组没有操作指示图标
// listItem.setDrawableId(drawableId);

ArrayList<LeftPanelListItem> firstGroup = new ArrayList<LeftPanelListItem>();
for (int i = 0; i < names.length; i++) {
LeftPanelListItem firstGroupItem = new LeftPanelListItem();
firstGroupItem.setId(i);
firstGroupItem.setName(names[i]);
firstGroupItem.setDrawableId(icons[i]);

// 可以无限延伸
// firstGroupItem.setGroups(null);
firstGroup.add(firstGroupItem);
}

listItem.setGroups(firstGroup);
mListItems.add(listItem);
}

/**
* 设置选中的Item事件监听器
* @param seletedListener
*/
public void setOnSeletedListener(onSeletedListener seletedListener) {
mOnSeletedListener = seletedListener;
}

/**
* 选中的Item事件监听器
* @author android_ls
*/
public interface onSeletedListener {
/**
* 当前选中的Item事件处理器
* @param groupPosition 所属组Id
* @param childPosition 在所属组内的位置
*/
public abstract void seletedChildView(int groupPosition, int childPosition);
}

}

四、应用主界面源码：

package com.everyone.android.ui;

import android.os.Bundle;
import android.view.ViewGroup.LayoutParams;

import com.everyone.android.AppBaseActivity;
import com.everyone.android.api.OnMenuClickListener;
import com.everyone.android.widget.FreshNewsLayout;
import com.everyone.android.widget.LeftPanelLayout;
import com.everyone.android.widget.LeftPanelLayout.onSeletedListener;
import com.everyone.android.widget.MessageLayout;
import com.everyone.android.widget.ScrollerContainer;

/**
* 功能描述：应用主界面
* @author android_ls
*/
public class EveryoneActivity extends AppBaseActivity implements OnMenuClickListener, onSeletedListener {

/**
* 滚动（滑动）容器
*/
private ScrollerContainer mSlideContainer;

/**
* 左侧面板
*/
private LeftPanelLayout mLeftPanelLayout;

/**
* 新鲜事
*/
private FreshNewsLayout mFreshNewsLayout;

/**
* 消息
*/
private MessageLayout mMessageLayout;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(mSlideContainer);

}

@Override
protected int getLayoutId() {
return 0;
}

@Override
protected void setupView() {
mSlideContainer = new ScrollerContainer(mContext);
mLeftPanelLayout = new LeftPanelLayout(mContext);
mLeftPanelLayout.setOnSeletedListener(this);

mFreshNewsLayout = new FreshNewsLayout(mContext);
mMessageLayout = new MessageLayout(mContext);

mFreshNewsLayout.getTopMenuNavbar().setOnClickListener(this);
mMessageLayout.getTopMenuNavbar().setOnClickListener(this);

LayoutParams layoutParams = new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
mSlideContainer.addView(mLeftPanelLayout, 0, layoutParams);
mSlideContainer.addView(mFreshNewsLayout, 1, layoutParams);
}

@Override
protected void initialized() {
// TODO Auto-generated method stub

}

@Override
public void onClick() {
mSlideContainer.show();
}

@Override
public void seletedChildView(int groupPosition, int childPosition) {
switch (groupPosition) {
case 0: // 第一组

switch (childPosition) {
case 0:
mSlideContainer.show(mFreshNewsLayout);
break;
case 1:
mSlideContainer.show(mMessageLayout);
break;
case 2:

break;
case 3:

break;
case 4:

break;

default:
break;
}

break;
case 1: // 第二组
switch (childPosition) {
case 0:

break;
case 1:

break;
case 2:

break;
case 3:

break;
default:
break;
}

break;
case 2: // 第三组
switch (childPosition) {
case 0:

break;
case 1:

break;
default:
break;
}

break;
default:
break;
}

}

}

五、效果图：

新鲜事视图



点击顶部左侧Menu按钮后



点击左侧菜单的消息Item



松开手后的中心消息视图