参考博客
效果图

MainActivity

import androidx.appcompat.app.AppCompatActivity;
import android.graphics.Color;
import android.os.Bundle;
import android.widget.TextView;

import java.util.Timer;
import java.util.TimerTask;

public class MainActivity extends AppCompatActivity {
   
    private CircleProgressBar progressBar;

    private TextView percentageTextView;

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

        progressBar = findViewById(R.id.progressBar);
        percentageTextView = findViewById(R.id.percentageTextView);
        // 设置最大进度值为100
     progressBar.setProgress(100);
     
        Timer timer = new Timer();
        timer.scheduleAtFixedRate(new TimerTask() {
   
            int i = 0;
            @Override
            public void run() {
   
                if (i <= 100) {
   
                    final int progress = i;
                    runOnUiThread(new Runnable() {
   
                        @Override
                        public void run() {
   
                            progressBar.setProgress(progress);
                            percentageTextView.setText("SDC" + "\n" + progress + "%" + "\n" + "充电中");
                        }
                    });
                    i++;
                } else {
   
                    timer.cancel();
                }
            }
        }, 0, 50);
    }
}

CircleProgressBar

import android.animation.ObjectAnimator;
import android.content.Context;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PathMeasure;