安卓简易开发笔记条例第三d-侧滑界面

安卓简易开发笔记条例第三d-侧滑界面 安卓简易开发笔记条例 一、

首先编写SlideMene类，可直接复制进行使用，来自小小小白冷博主的文章-b站材料1-代码之侧滑界面的java文件

package com.example.myapplication2;


import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.widget.frameLayout;
import android.widget.Scroller;

public class SlideMenu extends frameLayout {
    private View menuView,mainView;
    private int menuWidth;
    private Scroller scroller;
    public SlideMenu(Context context) {
        super(context);
        init();
    }
    public SlideMenu(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }
    private void init(){
        scroller = new Scroller(getContext());
    }
    
    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();
        menuView = getChildAt(0);
        mainView = getChildAt(1);
        menuWidth = menuView.getLayoutParams().width;
    }
    //使Menu也具有滑动功能
    public boolean onInterceptTouchEvent(MotionEvent ev){
        switch (ev.getAction()) {
            case MotionEvent.ACTION_DOWN:
                downX = (int) ev.getX();
                break;
            case MotionEvent.ACTION_MOVE:
                int deltaX = (int) (ev.getX() - downX);
                if (Math.abs(deltaX) > 8){
                    return true;
                }
                break;
        }
        return super.onInterceptTouchEvent(ev);
    }

    
    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        menuView.layout(-menuWidth, 0, 0, b);
        mainView.layout(0, 0, r, b);
    }

    
    private int downX;
    public boolean onTouchEvent(MotionEvent event) {
        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                downX = (int) event.getX();
                break;
            case MotionEvent.ACTION_MOVE:
                int moveX = (int) event.getX();
                int deltaX = moveX - downX;
                int newScrollX = getScrollX() - deltaX;
                if (newScrollX < -menuWidth) newScrollX = -menuWidth;
                if (newScrollX > 0) newScrollX = 0;
                scrollTo(newScrollX, 0);
                downX = moveX;
                break;
            case MotionEvent.ACTION_UP:
                //当滑动距离小于Menu宽度的一半时，平滑滑动到主页面
                if(getScrollX()>-menuWidth/2){
                    closeMenu();
                }else {
                    //当滑动距离大于Menu宽度的一半时，平滑滑动到Menu页面
                    openMenu();
                }
                break;
        }
        return true;
    }
    //关闭menu
    private void closeMenu(){
        scroller.startScroll(getScrollX(),0,0-getScrollX(),0,400);
        invalidate();
    }
    //打开menu
    private void openMenu(){
        scroller.startScroll(getScrollX(),0,-menuWidth-getScrollX(),0,400);
        invalidate();
    }
    
    public void computeScroll(){
        super.computeScroll();
        if(scroller.computeScrollOffset()){
            //返回true,表示动画没结束
            scrollTo(scroller.getCurrX(),0);
            invalidate();
        }
    }
    
    public void switchMenu(){
        if(getScrollX()==0){
            openMenu();
        }else {
            closeMenu();
        }
    }

}

2.界面布局中，引用SlideMenu然后向其中添加include，注意，要侧滑出现的界面需要先一步载入

3.Java类代码
声明控件

    private SlideMenu slideMenu;
    private ImageView imageView;
    private Button bustudy;
    private Button buread;
    private Button buwatch;
    private Button buexec;

找到相关控件

 imageView = findViewById(R.id.iv_head);
        bustudy=findViewById(R.id.labu_1);
        buread=findViewById(R.id.labu_2);
        buwatch=findViewById(R.id.labu_3);
        buexec=findViewById(R.id.labu_4);

创建类继承监听事件，实现Button按钮的点击事件

 public class onclick implements View.OnClickListener{

        @Override
        public void onClick(View view) {
            Intent intent =null;
            switch (view.getId()){
                case R.id.labu_1:
                    intent = new Intent(SlideActivity.this, StudyActivity.class);
                    break;
                case R.id.labu_2:
                    intent = new Intent(SlideActivity.this,ReadActivity.class);
                    break;
                case R.id.labu_3:
                    intent = new Intent(SlideActivity.this,WatchActivity.class);
                    break;
                case R.id.labu_4:
                    intent = new Intent(SlideActivity.this,ExecActivity.class);
                    break;
            }
            startActivity(intent);
        }
    }

封装方法实现Button的点击事件

private void setListener(){
        onclick onclick = new onclick();
        //实现每一个按钮的点击
        bustudy.setOnClickListener(onclick);
        buread.setOnClickListener(onclick);
        buwatch.setOnClickListener(onclick);
        buexec.setOnClickListener(onclick);
    }

实现相关功能

 imageView.setOnClickListener(view -> {
            //调用方法实现侧滑效果
            slideMenu.switchMenu();
            ToastUtil.show(SlideActivity.this,"ok");
        });
        //调用Button按钮的实现方法
        setListener();