Android 星期选择器

平台有需求定时开关机功能可以选择星期，本来想在网上找个可以选择星期的Selector，但是好像没找到合适的，只能自己写一个了。
一个星期选择器自定义View，效果图

 

WeekCircleView.java
 

package com.fqcx.rpsettings.view;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;

import com.fqcx.rpsettings.R;

/**
 *
 * 星期选择器
 *
 * */
public class WeekCircleView extends View {
    public int width = 140;
    public int height = 140;
    private Paint circlePaint;
    private Paint textPaint;
    private DisplayMetrics dm;

    private static final String TAG = "WeekCircleView";
    private String text;
    private boolean isChecked;

    //三个构造函数都必须调用，否则无法正常使用自定义view
    public WeekCircleView(Context context) {
        this(context,null);
    }

    public WeekCircleView(Context context, AttributeSet attrs) {
        this(context, attrs,0);
    }

    public WeekCircleView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.WeekCircleView);
        text = a.getString(R.styleable.WeekCircleView_circletext);
        isChecked = a.getBoolean(R.styleable.WeekCircleView_circlecheck, false);
        initPaint();
    }


    public void initPaint(){
        circlePaint = new Paint();
        circlePaint.setAntiAlias(true);
        if(isChecked){
            circlePaint.setColor(Color.BLUE);
        }else {
            circlePaint.setColor(Color.BLACK);
        }
        circlePaint.setStyle(Paint.Style.STROKE);
        textPaint = new Paint();
        textPaint.setAntiAlias(true);
        textPaint.setTextSize(44);


        dm = new DisplayMetrics();
        dm = getResources().getDisplayMetrics();
        Log.e(TAG + " WeekCircleView :", "screenWidth=" + dm.widthPixels + "; screenHeight=" + dm.heightPixels);
        if(dm.widthPixels <= 1920  ||  dm.heightPixels <=1080){
            width = 70;
            height = 70;
            textPaint.setTextSize(22);
        }

        if(isChecked){
            textPaint.setColor(Color.BLUE);
        }else {
            textPaint.setColor(Color.BLACK);
        }

        textPaint.setFakeBoldText(true);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        canvas.drawCircle(width / 2,width / 2,width / 2-5,circlePaint);

        float textWidth = textPaint.measureText(text);
        float x = (width - textWidth) / 2;
        Paint.FontMetrics metrics = textPaint.getFontMetrics();
        //ascent是负的，descent是正的，dy是正的
        float dy = -(metrics.ascent + metrics.descent) / 2;
        float y = height / 2 + dy;

        canvas.drawText(text,x,y,textPaint);
    }


    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        setMeasuredDimension(width,height);
    }

    public void setChecked(boolean checked){
        if(checked){
            textPaint.setColor(Color.BLUE);
            isChecked=true;
        }else {
            textPaint.setColor(Color.BLACK);
            isChecked=false;
        }
        initPaint();
        invalidate();
    }

    public boolean isChecked(){
        return isChecked;
    }

    @Override
    public boolean dispatchTouchEvent(MotionEvent event) {
        switch (event.getAction() ) {
            case MotionEvent.ACTION_DOWN:
                isChecked=!isChecked;
                initPaint();
                invalidate();
                return true;
        }
        return super.dispatchTouchEvent(event);
    }
}

自定义属性
 

引用

代码比较简单这里就不细说了。