关于自定义标题栏的实现

步骤

1、编写布局文件layout_topbar.xml，使用相对布局，左边一个button，跟父控件左对齐后外边距为5dp，右边的button也是一样，中间的标题居中显示 。

ncoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <Button
        android:id="@+id/leftButton"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:layout_alignParentLeft="true"
        android:layout_centerVertical="true"
        android:layout_marginLeft="5dp" />

    <TextView
        android:id="@+id/titleText"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:paddingTop="6dp"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:gravity="center" />

    <Button
        android:id="@+id/rightButton"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:layout_alignParentRight="true"
        android:layout_centerVertical="true"
        android:layout_marginRight="5dp" />
</RelativeLayout>

2.编写自定义控件，继承RelativeLayout，获取自定义属性并给对应的控件赋值 。

package com.example.ddf;

import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.widget.TextView;



/**
 * 描述：自定义topbar的实现
 * <p>
 * Created by djj on 2016/12/23.
 */

public class TopBar extends RelativeLayout {

    private Button leftButton, rightButton;
    private TextView titleTextView;
    private OnLeftAndRightClickListener listener;//监听点击事件

    //设置监听器
    public void setOnLeftAndRightClickListener(OnLeftAndRightClickListener listener) {
        this.listener = listener;
    }

    //按钮点击接口
    public interface OnLeftAndRightClickListener {
        void OnLeftButtonClick();

        void OnRightButtonClick();
    }
    //设置左边按钮的可见性
    public void setLeftButtonVisibility(boolean flag){
        if (flag)
            leftButton.setVisibility(View.VISIBLE);
        else
            leftButton.setVisibility(View.GONE);
    }

    //设置右边按钮的可见性
    public void setRightButtonVisibility(boolean flag){
        if (flag)
            rightButton.setVisibility(View.VISIBLE);
        else
            rightButton.setVisibility(View.GONE);
    }
    public TopBar(Context context, AttributeSet attrs) {
        super(context, attrs);
        LayoutInflater.from(context).inflate(R.layout.laout_topbar, this);
        leftButton = (Button) findViewById(R.id.leftButton);
        rightButton = (Button) findViewById(R.id.rightButton);
        titleTextView = (TextView) findViewById(R.id.titleText);
        leftButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                if (listener != null) {
                    listener.OnLeftButtonClick();//点击回调
                }
            }
        });
        rightButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                if (listener != null) {
                    listener.OnRightButtonClick();//点击回调
                }
            }
        });

        //获得自定义属性并赋值
        TypedArray typeArray = context.obtainStyledAttributes(attrs, R.styleable.TopBar);
        int leftBtnBackground = typeArray.getResourceId(R.styleable.TopBar_leftBackground, 0);
        int rightBtnBackground = typeArray.getResourceId(R.styleable.TopBar_rightBackground, 0);
        String titleText = typeArray.getString(R.styleable.TopBar_titleText);
        float titleTextSize = typeArray.getDimension(R.styleable.TopBar_titleTextSize, 18);
        int titleTextColor = typeArray.getColor(R.styleable.TopBar_titleTextColor, 0x38ad5a);
        //释放资源
        typeArray.recycle();
        leftButton.setBackgroundResource(leftBtnBackground);
        rightButton.setBackgroundResource(rightBtnBackground);
        titleTextView.setText(titleText);
        titleTextView.setTextSize(titleTextSize);
        titleTextView.setTextColor(titleTextColor);
    }
}

3、调用自定义控件,在需要的activity或fragment的xml布局中调用

    <com.example.ddf.TopBar
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/topbar"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:layout_marginBottom="20dp"
        android:background="@drawable/biaotibeijing"
        app:leftBackground="@layout/left_button_selector"
        app:rightBackground="@layout/right_button_selector"
        app:titleText="添加美食"
        app:titleTextColor="#FFF"
        app:titleTextSize="15dp" />

4.左、右按钮点击变色的设置，右边按钮一样，这里省略

right_button_selector.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/rightpress" android:state_pressed="true"/>
    <item android:drawable="@drawable/rightnormal" />
</selector>

left_button_selector.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/backpress" android:state_pressed="true"/>
    <item android:drawable="@drawable/backnormal" />
</selector>

5.最后在activity或fragment中去实现其功能。

代码如下：

TopBar topBar = (TopBar) findViewById(R.id.topbar);
        topBar.setOnLeftAndRightClickListener(new TopBar.OnLeftAndRightClickListener() {
            @Override
            public void OnLeftButtonClick() {
                finish();//左边按钮实现的功能逻辑
            }

            @Override
            public void OnRightButtonClick() {
//右边按钮实现的功能逻辑
                Toast.makeText(HomeActivity.this, "RightButton", Toast.LENGTH_SHORT).show();
            }
        });

6.设置弹窗设置利用popupwindow

popup_window.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@layout/pop_window_bg">

    <ListView
        android:id="@+id/lsvMore"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:divider="#a51919"
        android:layout_weight="1" 
        android:dividerHeight="2dp"/>

</LinearLayout>

7.设置弹窗背景边框

popup_window_bg.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">

    <!-- dashWidth指的是边线的长度 dashGap 指的是每条线之间的间距 width指的是边线的宽度 -->
    <stroke
        android:width="2dp"
        android:color="#a51919"
        android:dashGap="2dp"
        android:dashWidth="10dp" />

    <corners
        android:bottomLeftRadius="2dp"
        android:bottomRightRadius="2dp"
        android:topLeftRadius="2dp"
        android:topRightRadius="2dp" />

</shape>

8.在avitvity中引用弹窗设置

AddActivity.java

public void initpopupwindow()
	{
		 // TODO: 2016/5/17 设置该Activity使用的布局文件
        btnPopup = (Button) findViewById(R.id.rightButton);// TODO: 2016/5/17 获取弹出按钮控件
        // TODO: 2016/5/17 给按钮设置单击事件监听
        btnPopup.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // TODO: 2016/5/17 构建一个popupwindow的布局
                View popupView = AddFoodActivity.this.getLayoutInflater().inflate(R.layout.popup_window, null);

                // TODO: 2016/5/17 为了演示效果，简单的设置了一些数据，实际中大家自己设置数据即可，相信大家都会。
                ListView lsvMore = (ListView) popupView.findViewById(R.id.lsvMore);
                lsvMore.setAdapter(new ArrayAdapter<String>(AddFoodActivity.this, android.R.layout.simple_list_item_1, datas));

                lsvMore.setOnItemClickListener(new AdapterView.OnItemClickListener() {
				  
				    public void onItemClick(AdapterView<?>arg0,View arg1,int arg2,long arg3)
				    {
				    	switch(arg2)
				    	{case 0: 
				    		Intent intent=new Intent(AddFoodActivity.this,MakeAudioActivity.class);
						    startActivity(intent);
						    break;
				    	case 1:
				    		Intent intent2=new Intent(AddFoodActivity.this,MakeVideoActivity.class);
							startActivity(intent2);
						break;
						default:break;
				    	}
				    }
                });
                // TODO: 2016/5/17 创建PopupWindow对象，指定宽度和高度
                PopupWindow window = new PopupWindow(popupView, 150, 150);
                // TODO: 2016/5/17 设置动画
                window.setAnimationStyle(R.style.popup_window_anim);
                // TODO: 2016/5/17 设置背景颜色
                window.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#F8F8F8")));
                // TODO: 2016/5/17 设置可以获取焦点
                window.setFocusable(true);
                // TODO: 2016/5/17 设置可以触摸弹出框以外的区域
                window.setOutsideTouchable(true);
                // TODO：更新popupwindow的状态
                window.update();
                // TODO: 2016/5/17 以下拉的方式显示，并且可以设置显示的位置
                window.showAsDropDown(btnPopup, 0, 10);
            }
        });
	}

参考网址：

自定义标题栏：https://www.jianshu.com/p/0763114e7738

弹窗：https://blog.youkuaiyun.com/csdnzouqi/article/details/51433633

最后在activity或fragment中去实现其功能。