android滑动view

package com.example.demo;

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;

/**
 * @author Huang xudong
 * @date 2020/7/26
 */
public class MainActivity extends AppCompatActivity {

    private LinearLayout view;
    /**
     * 定义你的View最大高度，maybe set max PHONE height
     * 这里设置最大值，防止底部还有组件
     */
    private int maxTopHeight=5000;
    /**
     * 获取控件的默认高度，当下滑最小高度的时候不再滑动了
     */
    private int defaultHeight=0;
    /**
     * 这里设置的组属性
     */
    private ViewGroup.LayoutParams layoutParams;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        view=findViewById(R.id.ll_main);
        layoutParams = view.getLayoutParams();
        defaultHeight=layoutParams.height;
        /**
         * 注册view滑动事件,可以选择其他的，比喻指定的组件
         */
        view.setOnTouchListener(new View.OnTouchListener() {
            int y=0;
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                switch (event.getAction()){
                    case MotionEvent.ACTION_DOWN:
                        y= (int) event.getRawY();
                        break;
                    case MotionEvent.ACTION_MOVE:
                        int lastY= (int) event.getRawY();
                        if (lastY-y>0){
                            if (layoutParams.height>defaultHeight){
                                layoutParams.height=layoutParams.height-Math.abs(lastY-y)/20;
                                view.setLayoutParams(layoutParams);
                            }
                        }else {
                            if (layoutParams.height<maxTopHeight-50){
                                layoutParams.height=layoutParams.height+Math.abs(lastY-y)/20;
                                view.setLayoutParams(layoutParams);
                            }
                        }
                        break;
                    default:
                        break;
                }
                return true;
            }
        });


    }
}

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:background="@color/colorPrimaryDark"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <LinearLayout
        android:id="@+id/ll_main"
        android:background="@color/colorAccent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        android:layout_width="0dp"
        android:layout_height="200dp"
        android:orientation="vertical">

        <TextView
            android:layout_margin="10dp"
            android:maxLines="1"
            android:ellipsize="end"
            android:textColor="#ffff"
            android:textSize="40sp"
            android:text="111111111111111111111"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">

        </TextView>

        <TextView
            android:layout_margin="10dp"
            android:maxLines="1"
            android:ellipsize="end"
            android:textColor="#ffff"
            android:textSize="40sp"
            android:text="222222222222222222"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">

        </TextView>
        <TextView
            android:layout_margin="10dp"
            android:maxLines="1"
            android:ellipsize="end"
            android:textColor="#ffff"
            android:textSize="40sp"
            android:text="3333333333333333"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">

        </TextView>
        <TextView
            android:layout_margin="10dp"
            android:maxLines="1"
            android:ellipsize="end"
            android:textColor="#ffff"
            android:textSize="40sp"
            android:text="4444444444444444"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">

        </TextView>

        <TextView
            android:layout_margin="10dp"
            android:maxLines="1"
            android:ellipsize="end"
            android:textColor="#ffff"
            android:textSize="40sp"
            android:text="55555555555555"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">

        </TextView>
        <TextView
            android:layout_margin="10dp"
            android:maxLines="1"
            android:ellipsize="end"
            android:textColor="#ffff"
            android:textSize="40sp"
            android:text="666666666666"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">

        </TextView>


    </LinearLayout>


</androidx.constraintlayout.widget.ConstraintLayout>

 

 主要有一个算法，其他的都是比较简单的。上面是效果图

本文地址：https://blog.csdn.net/s452195377/article/details/107595869