android调色器的实现

android调色器的实现

最近在github上发现一个比较好用的调色器，写出来和大家分享下，用法也超级简单。先看效果图吧。

1.首先需要引用一个库,在app文件夹下的build.gradle里添加库“colorpicker”，我的颜色选择结果用一个矩形来展现，这里用到了circleimageview，故一起引用了。

implementation 'com.dingmouren.colorpicker:colorpicker:1.0.1'
implementation 'de.hdodenhof:circleimageview:2.1.0'

2. activity_main.xml只是简单的布局了一个CircleImageView

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".MainActivity">
    <de.hdodenhof.circleimageview.CircleImageView
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:background="@color/colorAccent"
            android:id="@+id/paint" android:layout_marginTop="32dp"
            app:layout_constraintTop_toTopOf="parent" app:layout_constraintEnd_toEndOf="parent"
            android:layout_marginEnd="8dp" app:layout_constraintStart_toStartOf="parent"
            android:layout_marginStart="8dp"/>
</android.support.constraint.ConstraintLayout>

3.最后是MainActivity的实现，给CircleImageView注册点击事件，调起调色器，调色器有OnColorPickerListener回调，代码很简单。

import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import com.dingmouren.colorpicker.ColorPickerDialog;
import com.dingmouren.colorpicker.OnColorPickerListener;
import de.hdodenhof.circleimageview.CircleImageView;

public class MainActivity extends AppCompatActivity {

    private boolean supportAlpha; //是否支持透明度
    public static int myColor = Color.BLUE;
    static CircleImageView paint;

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

        paint = findViewById(R.id.paint);
        paint.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                ColorPickerDialog mColorPickerDialog = new ColorPickerDialog(
                        MainActivity.this,
                        myColor,
                        supportAlpha,
                        mOnColorPickerListener
                ).show();
            }
        });
    }


    public OnColorPickerListener mOnColorPickerListener = new OnColorPickerListener() {
        @Override
        public void onColorCancel(ColorPickerDialog dialog) {//取消选择的颜色

        }

        @Override
        public void onColorChange(ColorPickerDialog dialog, int color) {//实时监听颜色变化
            paint.setBackgroundColor(color);
        }

        @Override
        public void onColorConfirm(ColorPickerDialog dialog, int color) {//确定的颜色

            myColor = color;
            paint.setBackgroundColor(color);
        }
    };
}