Android 垂直拖动条，垂直SeekBar实现

一、效果图片

二、资源文件

在drawable资源文件夹创建：

1.seekbar_style.xml (可在此更改SeekBar背景长短粗细颜色)

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:id="@android:id/background"
        android:gravity="center_vertical|fill_horizontal">
        <shape android:shape="rectangle">
            <size android:height="4dp" />
            <solid android:color="#33505C63" />
            <corners android:radius="2dp" />
        </shape>
    </item>
    <item
        android:id="@android:id/progress"
        android:gravity="center_vertical|fill_horizontal">
        <scale android:scaleWidth="100%">
            <shape android:shape="rectangle">
                <size android:height="4dp" />
                <gradient
                    android:angle="0"
                    android:endColor="#FF4797D2"
                    android:startColor="#FF22425D" />
                <corners android:radius="2dp" />
            </shape>
        </scale>
    </item>
</layer-list>

2.ver_thumb.xml (可在此更改SeekBar的thumb样式)

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <!-- 宽和高>=轨道高，若此处的宽和高==track的高则圆圈与轨道一样大，类似苹果switch样式 -->
    <size
        android:width="15dp"
        android:height="10dp" />
    <gradient
        android:centerX="0.5"
        android:centerY="0.5"
        android:angle="1"
        android:endColor="#7B7B9B"
        android:gradientRadius="40px"
        android:startColor="#B9B9B9"
        android:type="linear" />
    <corners android:radius="5dp" />
    <stroke
        android:width="1dp"
        android:color="#FFB2ADAD" />
</shape>

三、布局

1.activity_main.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:orientation="horizontal">

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="50dp"
        android:orientation="vertical">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:gravity="center"
            android:text="自定义\n装饰背景" />

        <com.rivotek.VerticalSeekBar
            android:id="@+id/seekbar_decor"
            android:layout_width="wrap_content"
            android:layout_height="150dp"
            android:layout_gravity="center_horizontal"
            android:progressDrawable="@drawable/seekbar_style"
            android:thumb="@drawable/ver_thumb" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="50dp"
        android:orientation="vertical">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:gravity="center"
            android:text="android 原生\nSeekBar装饰" />

        <com.rivotek.VerticalSeekBar
            android:id="@+id/seekbar_normal"
            android:layout_width="wrap_content"
            android:layout_height="150dp"
            android:layout_gravity="center_horizontal" />
    </LinearLayout>

</LinearLayout>

四、Java代码

1.MainActivity.java

package com.ben;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.util.Log;
import android.widget.SeekBar;

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "LXP_MainActivity";

    VerticalSeekBar seek1,seek2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        seek1 = findViewById(R.id.seekbar_decor);
        seek2 = findViewById(R.id.seekbar_normal);

        seek1.setMin(1);
        seek1.setMax(100);

        seek2.setMin(10);
        seek2.setMax(1000);

        seek1.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                Log.i(TAG,"seek1  progress = " + progress);
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {

            }
        });

        seek2.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                Log.i(TAG,"seek2  progress = " + progress);
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {

            }
        });

    }
}

2.VerticalSeekBar.java

package com.ben;

import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.SeekBar;

@SuppressLint("AppCompatCustomView")
public class VerticalSeekBar extends SeekBar {

    private StartAndStopListener startAndStopListener;

    public VerticalSeekBar(Context context) {
        super(context);
    }

    public VerticalSeekBar(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

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

    protected void onSizeChanged(int w, int h, int oldW, int oldH) {
        super.onSizeChanged(h, w, oldW, oldH);
    }

    @Override
    protected synchronized void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(heightMeasureSpec, widthMeasureSpec);
        setMeasuredDimension(getMeasuredHeight(), getMeasuredWidth());
    }

    protected void onDraw(Canvas c) {
        c.rotate(-90);
        c.translate(-getHeight(), 0);
        super.onDraw(c);
    }

    @Override
    public synchronized void setProgress(int progress) {
        super.setProgress(progress);
        onSizeChanged(getWidth(), getHeight(), 0, 0);
    }

    @SuppressLint("ClickableViewAccessibility")
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (!isEnabled()) {
            return false;
        }
        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                if (startAndStopListener != null) {
                    startAndStopListener.startChange(this);
                }
            case MotionEvent.ACTION_MOVE:
                setProgress((int) (getMax() - (getMax() * event.getY() / getHeight())));
                break;
            case MotionEvent.ACTION_UP:
                if (startAndStopListener != null) {
                    startAndStopListener.stopChange(this,getProgress());
                }
                break;
            default:
                return super.onTouchEvent(event);
        }
        return true;
    }

    public void setStartAndStopListener(StartAndStopListener startAndStopListener) {
        this.startAndStopListener = startAndStopListener;
    }

    public interface StartAndStopListener {
        void startChange(VerticalSeekBar seekBar);
        void stopChange(VerticalSeekBar seekBar, int progress);
    }

}

结语：

完成以上就可以使用啦！点赞关注我，之后持续给大家带来更多的有关Android初级的内容。