自定义VIew

来源：互联网发布：vb是什么意思啊编辑：程序博客网时间：2024/06/08 06:11

//创建自定义类并继承view

package com.dell.myview_demo;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.LinearGradient;import android.graphics.Paint;import android.graphics.RectF;import android.graphics.Shader;import android.util.AttributeSet;import android.util.TypedValue;import android.view.View;/** * Created by DELL on 2017/9/4. */public class MyView extends View {    /*圆弧线宽*/    private float circleBorderWidth = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 20, getResources().getDisplayMetrics());    /*内边距*/    private float circlePadding = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 20, getResources().getDisplayMetrics());    /*字体大小*/    private float textSize = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, 50, getResources().getDisplayMetrics());    /*绘制圆周的画笔*/    private Paint backCirclePaint;    /*绘制圆周白色分割线的画笔*/    private Paint linePaint;    /*绘制文字的画笔*/    private Paint textPaint;    /*百分比*/    private int percent = 0;    /*渐变圆周颜色数组*/    private int[] gradientColorArray = new int[]{Color.GREEN, Color.parseColor("#fe751a"), Color.parseColor("#13be23"), Color.GREEN};    private Paint gradientCirclePaint;    private boolean flag = true;    private boolean flag1 = true;    private boolean flag3 = true;    public MyView(Context context) {        super(context);        init();    }    public MyView(Context context, AttributeSet attrs) {        super(context, attrs);        init();    }    public MyView(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        init();    }    private void init() {        backCirclePaint = new Paint();        backCirclePaint.setStyle(Paint.Style.STROKE);        backCirclePaint.setAntiAlias(true);        backCirclePaint.setColor(Color.LTGRAY);        backCirclePaint.setStrokeWidth(circleBorderWidth);//        backCirclePaint.setMaskFilter(new BlurMaskFilter(20, BlurMaskFilter.Blur.OUTER));        gradientCirclePaint = new Paint();        gradientCirclePaint.setStyle(Paint.Style.STROKE);        gradientCirclePaint.setAntiAlias(true);        gradientCirclePaint.setColor(Color.LTGRAY);        gradientCirclePaint.setStrokeWidth(circleBorderWidth);        linePaint = new Paint();        linePaint.setColor(Color.WHITE);        linePaint.setStrokeWidth(5);        textPaint = new Paint();        textPaint.setAntiAlias(true);        textPaint.setTextSize(textSize);        textPaint.setColor(Color.BLACK);    }    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        int measureWidth = MeasureSpec.getSize(widthMeasureSpec);        int measureHeight = MeasureSpec.getSize(heightMeasureSpec);        setMeasuredDimension(Math.min(measureWidth, measureHeight), Math.min(measureWidth, measureHeight));    }    @Override    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);        //1.绘制灰色背景圆环        canvas.drawArc(                new RectF(circlePadding * 2, circlePadding * 2,                        getMeasuredWidth() - circlePadding * 2, getMeasuredHeight() - circlePadding * 2), -90, 360, false, backCirclePaint);        //2.绘制颜色渐变圆环        LinearGradient linearGradient = new LinearGradient(circlePadding, circlePadding,                getMeasuredWidth() - circlePadding,                getMeasuredHeight() - circlePadding,                gradientColorArray, null, Shader.TileMode.MIRROR);        gradientCirclePaint.setShader(linearGradient);        gradientCirclePaint.setShadowLayer(10, 10, 10, Color.RED);        canvas.drawArc(                new RectF(circlePadding * 2, circlePadding * 2,                        getMeasuredWidth() - circlePadding * 2, getMeasuredHeight() - circlePadding * 2), -90, (float) (percent / 100.0) * 360, false, gradientCirclePaint);        //半径        float radius = (getMeasuredWidth() - circlePadding * 3) / 2;        //X轴中点坐标        int centerX = getMeasuredWidth() / 2;        //3.绘制100份线段，切分空心圆弧        for (float i = 0; i < 360; i += 3.6) {            double rad = i * Math.PI / 180;            float startX = (float) (centerX + (radius - circleBorderWidth) * Math.sin(rad));            float startY = (float) (centerX + (radius - circleBorderWidth) * Math.cos(rad));            float stopX = (float) (centerX + radius * Math.sin(rad) + 1);            float stopY = (float) (centerX + radius * Math.cos(rad) + 1);            canvas.drawLine(startX, startY, stopX, stopY, linePaint);        }        //4.绘制文字        float textWidth = textPaint.measureText(percent + "%");        int textHeight = (int) (Math.ceil(textPaint.getFontMetrics().descent - textPaint.getFontMetrics().ascent) + 2);        canvas.drawText(percent + "%", centerX - textWidth / 2, centerX + textHeight / 4, textPaint);        if (flag3) {            if (flag1) {                setPercent(percent);            } else {                if (percent == 100) {                    flag = false;                } else if (percent == 0) {                    flag = true;                }                if (flag == false) {                    setPercents(percent);                } else {                    setPercent(percent);                }            }        } else {            setPercentss(percent);        }    }    public void setPercentss(int percent) {        this.percent = percent;        invalidate();    }    public void setData(boolean flag3) {        this.flag3 = flag3;    }    /**     * 设置百分比     *     * @param percent     */    public void setPercent(int percent) {        percent++;        if (percent < 0) {            percent = 0;        } else if (percent > 100) {            percent = 100;        }        this.percent = percent;        invalidate();    }    public void setPercents(int percent) {        percent--;        if (percent < 0) {            percent = 0;        } else if (percent > 100) {            percent = 100;        }        this.percent = percent;        invalidate();    }    public void setRtate(boolean flag2) {        this.flag1 = flag2;    }}

//MainActivity

private Button button;private Button zanting;private MyView myView;private Handler handler = new Handler() {    @Override    public void handleMessage(Message msg) {        super.handleMessage(msg);        myView.setData(true);        myView.setRtate(false);    }};@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    myView = (MyView) findViewById(R.id.myview);    button = (Button) findViewById(R.id.zidong);    button.setOnClickListener(new View.OnClickListener() {        @Override        public void onClick(View v) {            handler.sendEmptyMessage(0);        }    });    zanting = (Button) findViewById(R.id.zanting);    zanting.setOnClickListener(new View.OnClickListener() {        @Override        public void onClick(View v) {            myView.setData(false);        }    });}
//xml文件

<Button    android:id="@+id/zanting"    android:textSize="25sp"    android:text="暂停"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_below="@+id/myview"    android:layout_alignParentRight="true"    android:layout_alignParentEnd="true"    android:layout_marginRight="64dp"    android:layout_marginEnd="64dp"    android:layout_marginTop="74dp" /><Button    android:id="@+id/zidong"    android:textSize="25sp"    android:text="开始"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_marginLeft="68dp"    android:layout_marginStart="68dp"    android:layout_alignBaseline="@+id/zanting"    android:layout_alignBottom="@+id/zanting"    android:layout_alignParentLeft="true"    android:layout_alignParentStart="true" />

//MyView的路径<com.dell.myview_demo.MyView    android:id="@+id/myview"    android:layout_width="250dp"    android:layout_height="250dp"    android:layout_alignParentTop="true"    android:layout_centerHorizontal="true"    android:layout_marginTop="31dp" />

阅读全文

0 0