Android Studio设置颜色拾色器工具Color Picker教程
时间：2022-09-02 09:15:35 | 栏目：Android代码 | 点击：次
你可能下载过一些获取颜色值的一些小工具，
这种方式获取颜色，需要先切换窗口转跳到桌面，然后打开拾色器小工具程序，然后去拾取颜色；
你可能也知道Android Studio自带一个颜色拾色器，通过下面这种方式才能找到
这种方式获取颜色值限制性很强，需要特定的窗口，需要点击那么一小块颜色才能弹出窗口，才能使用
那有没有更好的方式？ 答案是肯定的，不然这些个干嘛~~
不用向上面那样去打开拾色器小工具程序，不用在特定的窗口点击特定的位置弹出拾色器工具，是用我们最喜欢的快捷键的方式打开
Android Studio自带了颜色拾色器工具，但是它没有设置快捷键，也没有告诉我们， 这才是问题，
不罗嗦了，跟着下面的设置去设置快捷键吧
设置好之后Apply应用 + OK确认下就好了
下面就能愉快的玩耍了，Alt+C~~
补充知识：Android 自定义一个简版的取色器ColorPicker
最近在一个项目中要用到修改颜色功能，于是搜索了一波android自定义取色器，虽然搜索结果很多，但是都不是令人十分满意（可能是用久了AndroidStudio自带取色器的原因，真的是太好用了有没有？）。
既然这么喜欢AS的调色板，何不自己撸一个？心动不如行动，马上动手！
常规操作，先上效果图，简版取色器效果如下：
项目地址：
https://github.com/shixiuwen/colorpicker
布局单位使用的是dp，没有做其他过多适配操作，程序的源码很简单，可以直接clone下来修改成自己想要的效果或者做其他定制操作，直接使用的话，集成参考如下：
Step 1. Add the JitPack repository to your build file
//在根 build.gradle 中添加
allprojects {
repositories {
...
maven { url 'https://jitpack.io' }
}
}
Step 2. Add the dependency
//在模块 build.gradle 中添加
dependencies {
//v1.0.3是版本号，博客不会经常更新，最新版本见github
implementation 'com.github.shixiuwen:colorpicker:v1.0.3'
}
调用示例：
// .xml文件中 <com.shixia.colorpickerview.ColorPickerView android:id="@+id/cpv_color" android:layout_width="match_parent" android:layout_height="wrap_content" />
// Activity中
final TextView tvTest = findViewById(R.id.tv_test);
ColorPickerView colorPicker = findViewById(R.id.cpv_color_picker);
//对控件进行回调监听，获取颜色值color
colorPicker.setOnColorChangeListener(new OnColorChangeListener() {
@Override
public void colorChanged(int color) {
tvTest.setBackgroundColor(color);
}
});
该控件的颜色变化过程是通过观察AndroidStudio取色板颜色变化规律而得到的，因为项目没有其他要求，所以目前没有提供其他公开方法可以供外部调用，有这方面需求的可以自己把库下载下来自动修改，有修改困难的可以邮件联系。另外，如果后面该库会收到几个start的话会考虑加一些其他功能，比如 布局适配、颜色初始化功能、常用颜色记录功能…… 等等。
以下是关键类代码：
package com.shixia.colorpickerview;
import android.content.Context;
import android.graphics.Color;
import android.graphics.drawable.GradientDrawable;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
public class ColorPickerView extends LinearLayout {
private final View llColorProgress;
private final View vColorBar;
private final View rlTransBar;
private final View vTransBar;
private final RelativeLayout.LayoutParams transBarLayoutParams;
private int red = 255, green = 0, blue = 0;
private int index = 0;
private ColorPreviewView cpvColorPreview;
private View vLocation;
private View vBgColor;
private final RelativeLayout.LayoutParams colorBarLayoutParams;
private int transValue = 255; //透明度
private final ImageView vTransPreview;
private OnColorChangeListener onColorChangeListener;
private RelativeLayout.LayoutParams vLocationLayoutParams;
public ColorPickerView(Context context, AttributeSet attrs) {
super(context, attrs);
View view = LayoutInflater.from(context).inflate(R.layout.view_color_picker, this);
vBgColor = view.findViewById(R.id.fl_color);
vLocation = view.findViewById(R.id.view_location);
vLocationLayoutParams = (RelativeLayout.LayoutParams) vLocation.getLayoutParams();
llColorProgress = findViewById(R.id.ll_color_progress);
cpvColorPreview = view.findViewById(R.id.cpv_color_preview);
vColorBar = view.findViewById(R.id.view_color_bar);
colorBarLayoutParams = (RelativeLayout.LayoutParams) vColorBar.getLayoutParams();
rlTransBar = view.findViewById(R.id.rl_trans_bar);
vTransBar = view.findViewById(R.id.view_trans_bar);
transBarLayoutParams = (RelativeLayout.LayoutParams) vTransBar.getLayoutParams();
vTransPreview = view.findViewById(R.id.view_trans_preview);
/*调整颜色*/
llColorProgress.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
int action = event.getAction();
int width = llColorProgress.getWidth();
switch (action) {
case MotionEvent.ACTION_DOWN:
break;
case MotionEvent.ACTION_MOVE:
break;
case MotionEvent.ACTION_UP:
break;
}
float leftMargin = event.getX();
float x = 0;
if (leftMargin < vColorBar.getWidth() / 2) {
colorBarLayoutParams.leftMargin = 0;
} else if (leftMargin > width - vColorBar.getWidth() / 2) {
x = 100;
colorBarLayoutParams.leftMargin = width - vColorBar.getWidth();
} else {
x = event.getX() / width * 100;
colorBarLayoutParams.leftMargin = (int) (leftMargin - vColorBar.getWidth() / 2);
}
vColorBar.setLayoutParams(colorBarLayoutParams);
onProgressChanged((int) x);
return true;
}
});
/*调整透明度*/
rlTransBar.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
int action = event.getAction();
int width = rlTransBar.getWidth();
switch (action) {
case MotionEvent.ACTION_DOWN:
break;
case MotionEvent.ACTION_MOVE:
break;
case MotionEvent.ACTION_UP:
break;
}
float leftMargin = event.getX();
float x = 0;
if (leftMargin < vTransBar.getWidth() / 2) {
transBarLayoutParams.leftMargin = 0;
} else if (leftMargin > width - vTransBar.getWidth() / 2) {
x = 100;
transBarLayoutParams.leftMargin = width - vTransBar.getWidth();
} else {
x = event.getX() / width * 100;
transBarLayoutParams.leftMargin = (int) (leftMargin - vTransBar.getWidth() / 2);
}
vTransBar.setLayoutParams(transBarLayoutParams);
changeTransparency((int) x);
return true;
}
});
/*调整颜色明暗*/
vBgColor.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
int width = vBgColor.getWidth();
int height = vBgColor.getHeight();
int action = event.getAction();
int leftMargin;
int topMargin;
switch (action) {
case MotionEvent.ACTION_DOWN:
break;
case MotionEvent.ACTION_MOVE:
//防止越界处理
if (event.getX() > width - vLocation.getWidth() / 2F) {
leftMargin = width - vLocation.getWidth();
} else if (event.getX() < vLocation.getWidth() / 2F) {
leftMargin = 0;
} else {
leftMargin = (int) (event.getX() - vLocation.getWidth() / 2F);
}
if (event.getY() > height - vLocation.getHeight() / 2F) {
topMargin = height - vLocation.getHeight();
} else if (event.getY() <= vLocation.getHeight() / 2F) {
topMargin = 0;
} else {
topMargin = (int) (event.getY() - vLocation.getHeight() / 2F);
}
vLocationLayoutParams.leftMargin = leftMargin;
vLocationLayoutParams.topMargin = topMargin;
vLocation.setLayoutParams(vLocationLayoutParams);
changeColor();
break;
case MotionEvent.ACTION_UP:
break;
}
return true;
}
});
}
/**
* 颜色值调整
*
* @param progressColor
*/
private void onProgressChanged(int progressColor) {
red = 0;
green = 0;
blue = 0;
index = (int) (progressColor / (100 / 6F));
float v = progressColor % (100 / 6F) / (100 / 6F);
switch (index) {
case 0: //红<-->中--绿
red = 255;
green = (int) (255 * v);
break;
case 1://红--中<-->绿
red = (int) (255 * (1 - v));
green = 255;
break;
case 2: //绿<-->中--蓝
green = 255;
blue = (int) (255 * v);
break;
case 3://绿--中<-->蓝
green = (int) (255 * (1 - v));
blue = 255;
break;
case 4: //蓝<-->中--红
blue = 255;
red = (int) (255 * v);
break;
case 5://蓝--中<-->红
blue = (int) (255 * (1 - v));
red = 255;
break;
default:
red = 255;
break;
}
vBgColor.setBackgroundColor(Color.rgb(red, green, blue));
changeColor();
}
/**
* 颜色明暗度调整
*/
private void changeColor() {
int tempRed = red;
int tempGreen = green;
int tempBlue = blue;
float hPercent = 1 - (vLocation.getX() / (vBgColor.getWidth() - vLocation.getWidth()));
float vPercent = vLocation.getY() / (vBgColor.getHeight() - vLocation.getHeight());
switch (index) {
case 0:
tempGreen = (int) (green + hPercent * (255 - green));
tempBlue = (int) (blue + hPercent * (255 - blue));
break;
case 1:
tempRed = (int) (red + hPercent * (255 - red));
tempBlue = (int) (blue + hPercent * (255 - blue));
break;
case 2:
tempRed = (int) (red + hPercent * (255 - red));
tempBlue = (int) (blue + hPercent * (255 - blue));
break;
case 3:
tempRed = (int) (red + hPercent * (255 - red));
tempGreen = (int) (green + hPercent * (255 - green));
break;
case 4:
tempRed = (int) (red + hPercent * (255 - red));
tempGreen = (int) (green + hPercent * (255 - green));
break;
case 5:
case 6:
tempGreen = (int) (green + hPercent * (255 - green));
tempBlue = (int) (blue + hPercent * (255 - blue));
break;
}
tempRed = (int) (tempRed - tempRed * vPercent);
tempGreen = (int) (tempGreen - tempGreen * vPercent);
tempBlue = (int) (tempBlue - tempBlue * vPercent);
int color = Color.argb(transValue, tempRed, tempGreen, tempBlue);
cpvColorPreview.setColor(color);
if (onColorChangeListener != null) {
onColorChangeListener.colorChanged(color);
}
int[] gradientColor = {Color.argb(0, 0, 0, 0), Color.rgb(tempRed, tempGreen, tempBlue)};
GradientDrawable drawable = new GradientDrawable(GradientDrawable.Orientation.LEFT_RIGHT, gradientColor);
vTransPreview.setBackground(drawable);
}
/**
* 改变透明度
*
* @param progress
*/
private void changeTransparency(int progress) {
transValue = (int) (progress / 100F * 255);
int color = Color.argb(transValue, red, green, blue);
cpvColorPreview.setColor(color);
if (onColorChangeListener != null) {
onColorChangeListener.colorChanged(color);
}
}
@Override
public void onWindowFocusChanged(boolean hasWindowFocus) {
super.onWindowFocusChanged(hasWindowFocus);
RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) vLocation.getLayoutParams();
layoutParams.leftMargin = vBgColor.getWidth() - vLocation.getWidth();
vLocation.setLayoutParams(layoutParams);
colorBarLayoutParams.leftMargin = llColorProgress.getWidth() - vColorBar.getWidth();
vColorBar.setLayoutParams(colorBarLayoutParams);
transBarLayoutParams.leftMargin = rlTransBar.getWidth() - vTransBar.getWidth();
vTransBar.setLayoutParams(transBarLayoutParams);
int[] color = {Color.argb(0, 0, 0, 0), Color.rgb(255, 0, 0)};
GradientDrawable drawable = new GradientDrawable(GradientDrawable.Orientation.LEFT_RIGHT, color);
vTransPreview.setBackground(drawable);
}
/**
* 设置该方法，颜色改变的时候会回调颜色值
*
* @param onColorChangeListener
*/
public void setOnColorChangeListener(OnColorChangeListener onColorChangeListener) {
this.onColorChangeListener = onColorChangeListener;
}
}