Android仿人人客户端（v5，2024最新百度、头条等公司Android面试题目

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    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>




       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）：

<LinearLayout xmlns:android="schemas.android.com/apk/res/and…"

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" />




       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）：

<LinearLayout xmlns:android="schemas.android.com/apk/res/and…"

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" />





       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);

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