Android studio实现圆形进度条

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;@Overrideprotected 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100progressBar.setProgress(100);Timer timer = new Timer();timer.scheduleAtFixedRate(new TimerTask() {int i = 0;@Overridepublic void run() {if (i <= 100) {final int progress = i;runOnUiThread(new Runnable() {@Overridepublic 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;