安卓垂直SeekBar _安卓

厌伴老儒烹瓠叶，强随举子踏槐花。这篇文章主要讲述安卓垂直SeekBar相关的知识，希望能为你提供帮助。

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.MotionEvent;

import androidx.appcompat.widget.AppCompatSeekBar;

/**
* @author zhangwei on 2019/12/11.
*/
public class VerticalSeekBar extends AppCompatSeekBar {

private Drawable mThumb;
private OnSeekBarChangeListener mOnSeekBarChangeListener;

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

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

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

@Override
public void setOnSeekBarChangeListener(OnSeekBarChangeListener l) {
mOnSeekBarChangeListener = l;
}

@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(h, w, oldh, oldw);
}

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

@Override
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);
onProgressRefresh(getProgress() / (float) getMax(), true);
}

@Override
public void setProgress(int progress, boolean animate) {
super.setProgress(progress, animate);
onProgressRefresh(getProgress() / (float) getMax(), true);
}

public void onProgressRefresh(float scale, boolean fromUser) {
Drawable thumb = mThumb;
if (thumb != null) {
setThumbPos(getHeight(), thumb, scale, Integer.MIN_VALUE);
invalidate();
}
if (mOnSeekBarChangeListener != null) {
mOnSeekBarChangeListener.onProgressChanged(this, getProgress(), fromUser);
}
}

private void setThumbPos(int w, Drawable thumb, float scale, int gap) {
int available = w - getPaddingLeft() - getPaddingRight();

int thumbWidth = thumb.getIntrinsicWidth();
int thumbHeight = thumb.getIntrinsicHeight();

int thumbPos = (int) (scale * available + 0.5f);

// int topBound = getWidth() / 2 - thumbHeight / 2 - getPaddingTop();
// int bottomBound = getWidth() / 2 + thumbHeight / 2 - getPaddingTop();
int topBound, bottomBound;
if (gap == Integer.MIN_VALUE) {
Rect oldBounds = thumb.getBounds();
topBound = oldBounds.top;
bottomBound = oldBounds.bottom;
} else {
topBound = gap;
bottomBound = gap + thumbHeight;
}
thumb.setBounds(thumbPos, topBound, thumbPos + thumbWidth, bottomBound);
}

@Override
public void setThumb(Drawable thumb) {
mThumb = thumb;
super.setThumb(thumb);
}

void onStartTrackingTouch() {
if (mOnSeekBarChangeListener != null) {
mOnSeekBarChangeListener.onStartTrackingTouch(this);
}
}

void onStopTrackingTouch() {
if (mOnSeekBarChangeListener != null) {
mOnSeekBarChangeListener.onStopTrackingTouch(this);
}
}

private void attemptClaimDrag() {
if (getParent() != null) {
getParent().requestDisallowInterceptTouchEvent(true);
}
}

@Override
public boolean onTouchEvent(MotionEvent event) {
if (!isEnabled()) {
return false;
}
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
setPressed(true);
onStartTrackingTouch();
if (!getThumb().getBounds().contains(getHeight() - (int) event.getY(), (int) event.getX())) {
setProgress(getMax() - (int) (getMax() * event.getY() / getHeight()));
}
break;

case MotionEvent.ACTION_MOVE:
attemptClaimDrag();
if (!getThumb().getBounds().contains(getHeight() - (int) event.getY(), (int) event.getX())) {
setProgress(getMax() - (int) (getMax() * event.getY() / getHeight()));
}
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
onStopTrackingTouch();
setPressed(false);
break;
default:
}
return true;
}
}

自定义progress.xml进度条颜色添加阴影效果

< ?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"> < layer-list> < item> < shape> < corners android:radius="5dp" /> < gradient android:centerColor="#3d4C9DE6" android:endColor="#1f000000" android:startColor="#1f000000" /> < /shape> < /item> < item android:bottom="1dp" android:left="1dp"> < shape> < corners android:radius="5dp" /> < size android:height="10dp" /> < gradient android:centerColor="#ffC6D9E6" android:endColor="#ffCCDDE7" android:startColor="#FFE0F3FF" /> < /shape> < /item> < /layer-list> < /item> < item android:id="@android:id/progress" android:gravity="center_vertical|fill_horizontal"> < clip> < layer-list> < item> < shape> < corners android:radius="5dp" /> < gradient android:endColor="#1f000000" android:startColor="#1f000000" /> < /shape> < /item> < item android:bottom="1dp" android:left="1dp"> < shape> < size android:height="10dp" /> < corners android:radius="5dp" /> < gradient android:centerColor="#FF589EFF" android:endColor="#FF589EFF" android:startColor="#FF589EFF" /> < /shape> < /item> < /layer-list> < /clip> < /item> < /layer-list>

布局中使用

< com.boe.mhealth.myview.seekbar.VerticalSeekBar android:id="@+id/massager_home_power_seekBar" android:layout_width="wrap_content" android:layout_height="281dp" android:duplicateParentState="true" android:max="15" android:paddingStart="10dp" android:paddingEnd="12dp" android:progressDrawable="@drawable/progress_bg" android:splitTrack="false" android:thumb="@mipmap/icon_thumb" app:layout_constraintEnd_toEndOf="@id/massager_home_power_value" app:layout_constraintStart_toStartOf="@id/massager_home_power_value" app:layout_constraintTop_toBottomOf="@id/massager_home_power_value" />

【安卓垂直SeekBar】