自定义View设置转盘

XML中的代码

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    >
    <bawei.com.day3_1.customview.CustomView
       android:id="@+id/custom_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <bawei.com.day3_1.customview.CustomInsideView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</RelativeLayout>

CustomView中的代码

public class CustomView extends View {
    private Paint mPaint;
    private int CriCount=6;
    private RectF rectF;
    private int degree=0;
    private int textDegree=15;

    public CustomView(Context context) {
        super(context);
        initView();
    }

    public CustomView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        initView();
    }
    private int[] colors=new int[]{Color.parseColor("#8EE5EE"), Color.parseColor("#FFD700"), Color.parseColor("#FFD39B"), Color.parseColor("#FF8247"), Color.parseColor("#FF34B3"), Color.parseColor("#F0E68C")};
    private String[] str=new String[]{"一等奖","二等奖","三等奖","四等奖","特等奖","谢谢参与奖"};


    @SuppressLint("DrawAllocation")
    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        for (int i=0;i<CriCount;i++){
            mPaint.setColor(colors[i]);//设置扇形颜色
            canvas.drawArc(rectF,degree,60,true,mPaint);//设置扇形
            mPaint.setColor(Color.BLACK);//设置字体颜色
            mPaint.setTextSize(30);//设置字体大小
            Path path = new Path();
            path.addArc(rectF,textDegree,60);
            canvas.drawTextOnPath(str[i],path,60,60,mPaint);//设置字体
            degree+=60;
            textDegree+=60;
        }


    }
    public void initView(){
        mPaint=new Paint();
        rectF=new RectF();
        rectF.top=100;
        rectF.left=100;
        rectF.bottom=800;
        rectF.right=800;
    }
}

CustomInsideView中的代码

public class CustomInsideView extends View {
    private Paint paint;
    private RectF rectF;
    public CustomInsideView(Context context) {
        super(context);
        initView();
    }

    public CustomInsideView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        initView();
    }
    public void initView(){
        paint=new Paint();
        paint.setColor(Color.RED);
        paint.setStrokeWidth(20);
        paint.setStyle(Paint.Style.FILL);
        paint.setTextSize(60);

        rectF=new RectF();
        rectF.top=100;
        rectF.left=350;
        rectF.bottom=400;
        rectF.right=550;

    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        paint.setColor(Color.BLACK);
        canvas.drawArc(rectF,60,60,true,paint);//设置指针
        paint.setColor(Color.RED);
        canvas.drawCircle(450,450,150,paint); //设置圆
        paint.setColor(Color.BLACK);
        canvas.drawText("Start",380,470,paint);//设置字体
    }
}

MainActivity中的代码

public class MainActivity extends AppCompatActivity {

    private CustomView customView;

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

    private void initView(Bundle savedInstanceState) {
        customView = findViewById(R.id.custom_view);
        customView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                float degree= (float) (720+Math.random()*1000);
                RotateAnimation animation=new RotateAnimation(0,-degree,450,450);
                animation.setDuration(5000);
                animation.setFillAfter(true);
                customView.startAnimation(animation);
            }
        });
    }
}