自定义View 更新

布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:custom="http://schemas.android.com/apk/res-auto"
    tools:context="com.example.zy.zhangyangyang1508d1009.MainActivity">
    <Button

        android:id="@+id/change"
        android:text="改变外层圆环颜色"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="39dp"
        android:layout_above="@+id/myCustomTitleView"
        android:layout_centerHorizontal="true" />


    <com.example.zymyview.CustomTitleView
        android:id="@+id/myCustomTitleView"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:layout_width="200dp"
        android:layout_height="200dp"
        custom:mSpeed="100"
        custom:mFirstColor="#0040ff"
        custom:mSecondColor="#40ff00"
        custom:mCircleWidth="20px"
        custom:textSize="30px"
        />


    <Button
        android:id="@+id/kaishi"
        android:text="开始"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/chongzhi"
        android:layout_alignBottom="@+id/chongzhi"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginLeft="51dp"
        android:layout_marginStart="51dp" />
    <Button
        android:id="@+id/chongzhi"
        android:text="重置"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginRight="53dp"
        android:layout_marginEnd="53dp"
        android:layout_below="@+id/myCustomTitleView"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true"
        android:layout_marginTop="32dp" />
</RelativeLayout>

          activity



import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.os.SystemClock;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

    private Myprogressround mypro;
    private Button change;
    private  boolean flag = false;
    private Handler handler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            if (msg.what == 0){
                mypro.setmPro();
            }
        }
    };

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

        mypro = (Myprogressround) findViewById(R.id.mypro);

        Button change= (Button) findViewById(R.id.change);
        Button kaishi= (Button) findViewById(R.id.kaishi);
        Button chongzhi= (Button) findViewById(R.id.chongzhi);


        kaishi.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                flag = false;
                new AsyncTask<String,Integer,String>(){

                    @Override
                    protected String doInBackground(String... strings) {

                        for (int i=1; i<361; i++){
                            if (flag == true){
                                handler.sendEmptyMessage(0);
                                break;
                            }
                            SystemClock.sleep(10);
                            publishProgress(i);
                        }
                        return null;
                    }

                    @Override
                    protected void onProgressUpdate(Integer... values) {
                        super.onProgressUpdate(values);
                        mypro.setProgress(values[0]);
                    }

                }.execute();
            }
        });


        chongzhi.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                flag = true;
              mypro.setmPro();
            }
        });

    }
}


 /// 自定义


import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.view.View;


public class Myprogressround extends View {

    private Paint paint;
    private int mProgress;
    private int mCountProgress;
    private float mradiuSize;
    private float mringSize;
    private float mtextSize;
    private float mprogressColor;

    public Myprogressround(Context context) {
        super(context);
        init();
    }

    public Myprogressround(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        getCustomAttr(context, attrs);
        init();
    }

    private void getCustomAttr(Context context, AttributeSet attrs) {
        TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.Myprogressround);
        mradiuSize = array.getDimension(R.styleable.Myprogressround_radiuSize, 100);
        mringSize = array.getDimension(R.styleable.Myprogressround_ringSize, 20);
        mtextSize = array.getDimension(R.styleable.Myprogressround_textSize, 30);
        mprogressColor = array.getColor(R.styleable.Myprogressround_progressColor, Color.YELLOW);

    }

    public Myprogressround(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init(){
        paint = new Paint();
        paint.setAntiAlias(true);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
        int heightSize = MeasureSpec.getSize(heightMeasureSpec);

        int width = 0;
        int height = 0;
        if(widthMode == MeasureSpec.AT_MOST){
            width = (int) (mradiuSize * 2);
        }else{
            width = Math.max(widthSize, (int) (mradiuSize * 2));
        }

        if(heightMode == MeasureSpec.AT_MOST){
            height = (int) (mradiuSize * 2);
        }else{
            height = Math.max(heightSize, (int) (mradiuSize * 2));
        }

        setMeasuredDimension(width, height);
    }

    @Override
    protected void onDraw(Canvas canvas) {

        paint.setStrokeWidth(0);
        paint.setColor(Color.BLUE);
        paint.setStyle(Paint.Style.STROKE);
        canvas.drawCircle(getMeasuredWidth()/2,getMeasuredHeight()/2,mradiuSize, paint);
        canvas.drawCircle(getMeasuredWidth()/2,getMeasuredHeight()/2,mradiuSize-mringSize,paint);

        paint.setTextSize(mtextSize);
        String text =mCountProgress + "%";
        float textWidth = paint.measureText(text);
        canvas.drawText(text, getMeasuredWidth()/2-textWidth/2, getMeasuredWidth()/2+mtextSize/2, paint);

        RectF rectF  = new RectF(getMeasuredWidth()/2 - mradiuSize + mringSize/2,getMeasuredHeight()/2 - mradiuSize + mringSize/2,getMeasuredWidth()/2 + mradiuSize - mringSize/2,getMeasuredHeight()/2 + mradiuSize - mringSize/2);
        paint.setStrokeWidth(mringSize);
        canvas.drawArc(rectF,0,mProgress,false,paint);

    }
    public  void setProgress(int progress){
        mProgress = progress;
        mCountProgress = progress * 100 / 360;
        invalidate();
    }

    public void setmPro(){
        mProgress = 0;
        mCountProgress = 0;
        invalidate();
    }

}



attrs文件

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <declare-styleable name="Myprogressround">
        <attr name="progressColor" format="color"></attr>
        <attr name="textSize" format="dimension"></attr>
        <attr name="ringSize" format="dimension"></attr>
        <attr name="radiuSize" format="dimension"></attr>
    </declare-styleable>
</resources>