CircleBarView

package wanghuiqi.bawie.com.whq_yk_moni1.model;

import android.animation.ValueAnimator;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.LinearGradient;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Shader;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.View;
import android.view.animation.OvershootInterpolator;

public class CircleBarView extends View {

    private final Context context;
    private Paint paint;
    private Paint bkPaint;
    private Paint tvPaint;
    private Rect mBound;
    private int height;
    private int width;
    private float progress;//進度

    public CircleBarView(Context context) {
        this(context, null);
    }

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

    public CircleBarView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        this.context = context;
        this.paint = new Paint();
        this.bkPaint = new Paint();
        this.tvPaint = new Paint();
        this.mBound = new Rect();
        init();
    }

    private void init() {
        paint.setStyle(Paint.Style.FILL);
        paint.setColor(Color.parseColor("#d91b1b"));
        paint.setAntiAlias(true);
        bkPaint.setStyle(Paint.Style.FILL);
        bkPaint.setColor(Color.parseColor("#afa7a7"));
        bkPaint.setAntiAlias(true);
        tvPaint.setColor(Color.parseColor("#ffffff"));
        tvPaint.setTextSize(25);
    }
    //獲取當前控制元件的高度和寬度

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        height = MeasureSpec.getSize(heightMeasureSpec);
        width = MeasureSpec.getSize(widthMeasureSpec);
    }

    private float setDegree(float sendFt) {
        //將進度的數值變為弧度值
        return sendFt * 3.6f;
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        if (width * height == 0) {
            return;
        }
        canvas.drawArc(new RectF(0, 0, width, height), 270, setDegree(progress), true, paint);
        canvas.drawCircle(width / 2, height / 2, width / 2 - 5, bkPaint);
        if (progress < 100) {
            String strPro = String.valueOf(progress) + "%";
            tvPaint.getTextBounds(strPro, 0, strPro.length(), mBound);
            canvas.drawText(strPro, width / 2 - mBound.width() / 2, height / 2 + mBound.height() / 2, tvPaint);
        } else {
            //達到100%顯示完成
            String text = "完成";
            tvPaint.getTextBounds(text, 0, text.length(), mBound);
            canvas.drawText(text, width / 2 - mBound.width() / 2, height / 2 + mBound.height() / 2, tvPaint);
        }
    }

    public void setProgress(float progress) {
       this.progress=progress;
        postInvalidate();
    }
}
 

MainActivity

package wanghuiqi.bawie.com.whq_yk_moni1;

import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.TextView;

import wanghuiqi.bawie.com.whq_yk_moni1.model.CircleBarView;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private CircleBarView circle_pro;
    private float progress = 0;
    private Handler handler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            if (msg.what == 1) {
                if (progress <= 99) {
                    ++progress;
                    circle_pro.setProgress(progress);
                    this.sendEmptyMessageDelayed(1, 1);
                }
            }
        }
    };
    private TextView textBawei;

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

    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.circle_pro:
                handler.sendEmptyMessageDelayed(1, 1);
                donghua();
                new Handler().postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        Intent intent = new Intent(MainActivity.this, PageActivity.class);
                        startActivity(intent);
                        finish();
                    }
                }, 2000);
                break;
        }
    }

    public void donghua() {
        AnimatorSet animatorSet = new AnimatorSet();
        ObjectAnimator ob_scale = ObjectAnimator.ofFloat(textBawei, "scaleX", new float[]{1f, 3f, 1f});
        ob_scale.setDuration(2000);
        ObjectAnimator ob_alpha = ObjectAnimator.ofFloat(textBawei, "alpha", new float[]{1.0f,0.8f});
        ob_alpha.setDuration(2000);
        ObjectAnimator ob_rotation = ObjectAnimator.ofFloat(textBawei, "rotationX", new float[]{0f, 360f});
        ob_rotation.setDuration(2000);
        animatorSet.playTogether(ob_scale,ob_alpha,ob_rotation);
        animatorSet.start();
    }
    private void initView() {
        circle_pro = findViewById(R.id.circle_pro);
        circle_pro.setOnClickListener(this);
        textBawei = findViewById(R.id.text_bw);
    }
}