本文實例為大家分享了Android實現簡單的加載進度條的具體代碼，供大家參考，具體內容如下

1.效果圖

2.自定義progressBar

package com.example.myapplication7; import android.animation.ValueAnimator;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.os.Bundle;import android.os.Parcelable;import android.util.AttributeSet;import android.view.animation.AccelerateDecelerateInterpolator;import android.widget.ProgressBar; import java.lang.annotation.Retention;import java.lang.annotation.RetentionPolicy; import androidx.annotation.IntDef; public class CircleProgressView extends ProgressBar { private int mReachBarSize = Utils.dp2px(getContext(), 2); // 未完成進度條大小 private int mNormalBarSize = Utils.dp2px(getContext(), 2); // 未完成進度條大小 private int mReachBarColor = Color.parseColor('#108ee9'); // 已完成進度顏色 private int mNormalBarColor = Color.parseColor('#FFD3D6DA'); // 未完成進度顏色 private int mTextSize = Utils.sp2px(getContext(), 14); // 進度值字體大小 private int mTextColor = Color.parseColor('#108ee9'); // 進度的值字體顏色 private float mTextSkewX; // 進度值字體傾斜角度 private String mTextSuffix = '%'; // 進度值前綴 private String mTextPrefix = ''; // 進度值后綴 private boolean mTextVisible = true; // 是否顯示進度值 private boolean mReachCapRound; // 畫筆是否使用圓角邊界，normalStyle下生效 private int mRadius = Utils.dp2px(getContext(), 20); // 半徑 private int mStartArc; // 起始角度 private int mInnerBackgroundColor; // 內部背景填充顏色 private int mProgressStyle = ProgressStyle.NORMAL; // 進度風格 private int mInnerPadding = Utils.dp2px(getContext(), 1); // 內部圓與外部圓間距 private int mOuterColor; // 外部圓環顏色 private boolean needDrawInnerBackground; // 是否需要繪制內部背景 private RectF rectF; // 外部圓環繪制區域 private RectF rectInner; // 內部圓環繪制區域 private int mOuterSize = Utils.dp2px(getContext(), 1); // 外層圓環寬度 private Paint mTextPaint; // 繪制進度值字體畫筆 private Paint mNormalPaint; // 繪制未完成進度畫筆 private Paint mReachPaint; // 繪制已完成進度畫筆 private Paint mInnerBackgroundPaint; // 內部背景畫筆 private Paint mOutPaint; // 外部圓環畫筆 private int mRealWidth; private int mRealHeight; @IntDef({ProgressStyle.NORMAL, ProgressStyle.FILL_IN, ProgressStyle.FILL_IN_ARC}) @Retention(RetentionPolicy.SOURCE) public @interface ProgressStyle {int NORMAL = 0;int FILL_IN = 1;int FILL_IN_ARC = 2; } public CircleProgressView(Context context) {this(context, null); } public CircleProgressView(Context context, AttributeSet attrs) {this(context, attrs, 0); } public CircleProgressView(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);obtainAttributes(attrs);initPaint(); } private void initPaint() {mTextPaint = new Paint();mTextPaint.setColor(mTextColor);mTextPaint.setStyle(Paint.Style.FILL);mTextPaint.setTextSize(mTextSize);mTextPaint.setTextSkewX(mTextSkewX);mTextPaint.setAntiAlias(true); mNormalPaint = new Paint();mNormalPaint.setColor(mNormalBarColor);mNormalPaint.setStyle(mProgressStyle == ProgressStyle.FILL_IN_ARC ? Paint.Style.FILL : Paint.Style.STROKE);mNormalPaint.setAntiAlias(true);mNormalPaint.setStrokeWidth(mNormalBarSize); mReachPaint = new Paint();mReachPaint.setColor(mReachBarColor);mReachPaint.setStyle(mProgressStyle == ProgressStyle.FILL_IN_ARC ? Paint.Style.FILL : Paint.Style.STROKE);mReachPaint.setAntiAlias(true);mReachPaint.setStrokeCap(mReachCapRound ? Paint.Cap.ROUND : Paint.Cap.BUTT);mReachPaint.setStrokeWidth(mReachBarSize); if (needDrawInnerBackground) { mInnerBackgroundPaint = new Paint(); mInnerBackgroundPaint.setStyle(Paint.Style.FILL); mInnerBackgroundPaint.setAntiAlias(true); mInnerBackgroundPaint.setColor(mInnerBackgroundColor);}if (mProgressStyle == ProgressStyle.FILL_IN_ARC) { mOutPaint = new Paint(); mOutPaint.setStyle(Paint.Style.STROKE); mOutPaint.setColor(mOuterColor); mOutPaint.setStrokeWidth(mOuterSize); mOutPaint.setAntiAlias(true);} } private void obtainAttributes(AttributeSet attrs) {TypedArray ta = getContext().obtainStyledAttributes(attrs, R.styleable.CircleProgressView);mProgressStyle = ta.getInt(R.styleable.CircleProgressView_cpv_progressStyle, ProgressStyle.NORMAL);// 獲取三種風格通用的屬性mNormalBarSize = (int) ta.getDimension(R.styleable.CircleProgressView_cpv_progressNormalSize, mNormalBarSize);mNormalBarColor = ta.getColor(R.styleable.CircleProgressView_cpv_progressNormalColor, mNormalBarColor); mReachBarSize = (int) ta.getDimension(R.styleable.CircleProgressView_cpv_progressReachSize, mReachBarSize);mReachBarColor = ta.getColor(R.styleable.CircleProgressView_cpv_progressReachColor, mReachBarColor); mTextSize = (int) ta.getDimension(R.styleable.CircleProgressView_cpv_progressTextSize, mTextSize);mTextColor = ta.getColor(R.styleable.CircleProgressView_cpv_progressTextColor, mTextColor);mTextSkewX = ta.getDimension(R.styleable.CircleProgressView_cpv_progressTextSkewX, 0);if (ta.hasValue(R.styleable.CircleProgressView_cpv_progressTextSuffix)) { mTextSuffix = ta.getString(R.styleable.CircleProgressView_cpv_progressTextSuffix);}if (ta.hasValue(R.styleable.CircleProgressView_cpv_progressTextPrefix)) { mTextPrefix = ta.getString(R.styleable.CircleProgressView_cpv_progressTextPrefix);}mTextVisible = ta.getBoolean(R.styleable.CircleProgressView_cpv_progressTextVisible, mTextVisible); mRadius = (int) ta.getDimension(R.styleable.CircleProgressView_cpv_radius, mRadius);rectF = new RectF(-mRadius, -mRadius, mRadius, mRadius); switch (mProgressStyle) { case ProgressStyle.FILL_IN:mReachBarSize = 0;mNormalBarSize = 0;mOuterSize = 0;break; case ProgressStyle.FILL_IN_ARC:mStartArc = ta.getInt(R.styleable.CircleProgressView_cpv_progressStartArc, 0) + 270;mInnerPadding = (int) ta.getDimension(R.styleable.CircleProgressView_cpv_innerPadding, mInnerPadding);mOuterColor = ta.getColor(R.styleable.CircleProgressView_cpv_outerColor, mReachBarColor);mOuterSize = (int) ta.getDimension(R.styleable.CircleProgressView_cpv_outerSize, mOuterSize);mReachBarSize = 0;// 將畫筆大小重置為0mNormalBarSize = 0;if (!ta.hasValue(R.styleable.CircleProgressView_cpv_progressNormalColor)) { mNormalBarColor = Color.TRANSPARENT;}int mInnerRadius = mRadius - mOuterSize / 2 - mInnerPadding;rectInner = new RectF(-mInnerRadius, -mInnerRadius, mInnerRadius, mInnerRadius); break; case ProgressStyle.NORMAL:mReachCapRound = ta.getBoolean(R.styleable.CircleProgressView_cpv_reachCapRound, true);mStartArc = ta.getInt(R.styleable.CircleProgressView_cpv_progressStartArc, 0) + 270;if (ta.hasValue(R.styleable.CircleProgressView_cpv_innerBackgroundColor)) { mInnerBackgroundColor = ta.getColor(R.styleable.CircleProgressView_cpv_innerBackgroundColor, Color.argb(0, 0, 0, 0)); needDrawInnerBackground = true;}break;}ta.recycle(); } @Override protected synchronized void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {int maxBarPaintWidth = Math.max(mReachBarSize, mNormalBarSize);int maxPaintWidth = Math.max(maxBarPaintWidth, mOuterSize);int height = 0;int width = 0;switch (mProgressStyle) { case ProgressStyle.FILL_IN:height = getPaddingTop() + getPaddingBottom() // 邊距+ Math.abs(mRadius * 2); // 直徑width = getPaddingLeft() + getPaddingRight() // 邊距+ Math.abs(mRadius * 2); // 直徑break; case ProgressStyle.FILL_IN_ARC:height = getPaddingTop() + getPaddingBottom() // 邊距+ Math.abs(mRadius * 2) // 直徑+ maxPaintWidth;// 邊框width = getPaddingLeft() + getPaddingRight() // 邊距+ Math.abs(mRadius * 2) // 直徑+ maxPaintWidth;// 邊框break; case ProgressStyle.NORMAL:height = getPaddingTop() + getPaddingBottom() // 邊距+ Math.abs(mRadius * 2) // 直徑+ maxBarPaintWidth;// 邊框width = getPaddingLeft() + getPaddingRight() // 邊距+ Math.abs(mRadius * 2) // 直徑+ maxBarPaintWidth;// 邊框break;} mRealWidth = resolveSize(width, widthMeasureSpec);mRealHeight = resolveSize(height, heightMeasureSpec); setMeasuredDimension(mRealWidth, mRealHeight); } @Override protected synchronized void onDraw(Canvas canvas) {switch (mProgressStyle) { case ProgressStyle.NORMAL:drawNormalCircle(canvas);break; case ProgressStyle.FILL_IN:drawFillInCircle(canvas);break; case ProgressStyle.FILL_IN_ARC:drawFillInArcCircle(canvas);break;} } /** * 繪制PROGRESS_STYLE_FILL_IN_ARC圓形 */ private void drawFillInArcCircle(Canvas canvas) {canvas.save();canvas.translate(mRealWidth / 2, mRealHeight / 2);// 繪制外層圓環canvas.drawArc(rectF, 0, 360, false, mOutPaint);// 繪制內層進度實心圓弧// 內層圓弧半徑float reachArc = getProgress() * 1.0f / getMax() * 360;canvas.drawArc(rectInner, mStartArc, reachArc, true, mReachPaint); // 繪制未到達進度if (reachArc != 360) { canvas.drawArc(rectInner, reachArc + mStartArc, 360 - reachArc, true, mNormalPaint);} canvas.restore(); } /** * 繪制PROGRESS_STYLE_FILL_IN圓形 */ private void drawFillInCircle(Canvas canvas) {canvas.save();canvas.translate(mRealWidth / 2, mRealHeight / 2);float progressY = getProgress() * 1.0f / getMax() * (mRadius * 2);float angle = (float) (Math.acos((mRadius - progressY) / mRadius) * 180 / Math.PI);float startAngle = 90 + angle;float sweepAngle = 360 - angle * 2;// 繪制未到達區域rectF = new RectF(-mRadius, -mRadius, mRadius, mRadius);mNormalPaint.setStyle(Paint.Style.FILL);canvas.drawArc(rectF, startAngle, sweepAngle, false, mNormalPaint);// 翻轉180度繪制已到達區域canvas.rotate(180);mReachPaint.setStyle(Paint.Style.FILL);canvas.drawArc(rectF, 270 - angle, angle * 2, false, mReachPaint);// 文字顯示在最上層最后繪制canvas.rotate(180);// 繪制文字if (mTextVisible) { String text = mTextPrefix + getProgress() + mTextSuffix; float textWidth = mTextPaint.measureText(text); float textHeight = (mTextPaint.descent() + mTextPaint.ascent()); canvas.drawText(text, -textWidth / 2, -textHeight / 2, mTextPaint);} } /** * 繪制PROGRESS_STYLE_NORMAL圓形 */ private void drawNormalCircle(Canvas canvas) {canvas.save();canvas.translate(mRealWidth / 2, mRealHeight / 2);// 繪制內部圓形背景色if (needDrawInnerBackground) { canvas.drawCircle(0, 0, mRadius - Math.min(mReachBarSize, mNormalBarSize) / 2, mInnerBackgroundPaint);}// 繪制文字if (mTextVisible) { String text = mTextPrefix + getProgress() + mTextSuffix; float textWidth = mTextPaint.measureText(text); float textHeight = (mTextPaint.descent() + mTextPaint.ascent()); canvas.drawText(text, -textWidth / 2, -textHeight / 2, mTextPaint);}// 計算進度值float reachArc = getProgress() * 1.0f / getMax() * 360;// 繪制未到達進度if (reachArc != 360) { canvas.drawArc(rectF, reachArc + mStartArc, 360 - reachArc, false, mNormalPaint);}// 繪制已到達進度canvas.drawArc(rectF, mStartArc, reachArc, false, mReachPaint);canvas.restore(); } /** * 動畫進度(0-當前進度) * * @param duration 動畫時長 */ public void runProgressAnim(long duration) {setProgressInTime(0, duration); } /** * @param progress 進度值 * @param duration 動畫播放時間 */ public void setProgressInTime(final int progress, final long duration) {setProgressInTime(progress, getProgress(), duration); } /** * @param startProgress 起始進度 * @param progress 進度值 * @param duration 動畫播放時間 */ public void setProgressInTime(int startProgress, final int progress, final long duration) {ValueAnimator valueAnimator = ValueAnimator.ofInt(startProgress, progress);valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator animator) {//獲得當前動畫的進度值，整型，1-100之間int currentValue = (Integer) animator.getAnimatedValue();setProgress(currentValue); }});AccelerateDecelerateInterpolator interpolator = new AccelerateDecelerateInterpolator();valueAnimator.setInterpolator(interpolator);valueAnimator.setDuration(duration);valueAnimator.start(); } public int getReachBarSize() {return mReachBarSize; } public void setReachBarSize(int reachBarSize) {mReachBarSize = Utils.dp2px(getContext(), reachBarSize);invalidate(); } public int getNormalBarSize() {return mNormalBarSize; } public void setNormalBarSize(int normalBarSize) {mNormalBarSize = Utils.dp2px(getContext(), normalBarSize);invalidate(); } public int getReachBarColor() {return mReachBarColor; } public void setReachBarColor(int reachBarColor) {mReachBarColor = reachBarColor;invalidate(); } public int getNormalBarColor() {return mNormalBarColor; } public void setNormalBarColor(int normalBarColor) {mNormalBarColor = normalBarColor;invalidate(); } public int getTextSize() {return mTextSize; } public void setTextSize(int textSize) {mTextSize = Utils.sp2px(getContext(), textSize);invalidate(); } public int getTextColor() {return mTextColor; } public void setTextColor(int textColor) {mTextColor = textColor;invalidate(); } public float getTextSkewX() {return mTextSkewX; } public void setTextSkewX(float textSkewX) {mTextSkewX = textSkewX;invalidate(); } public String getTextSuffix() {return mTextSuffix; } public void setTextSuffix(String textSuffix) {mTextSuffix = textSuffix;invalidate(); } public String getTextPrefix() {return mTextPrefix; } public void setTextPrefix(String textPrefix) {mTextPrefix = textPrefix;invalidate(); } public boolean isTextVisible() {return mTextVisible; } public void setTextVisible(boolean textVisible) {mTextVisible = textVisible;invalidate(); } public boolean isReachCapRound() {return mReachCapRound; } public void setReachCapRound(boolean reachCapRound) {mReachCapRound = reachCapRound;invalidate(); } public int getRadius() {return mRadius; } public void setRadius(int radius) {mRadius = Utils.dp2px(getContext(), radius);invalidate(); } public int getStartArc() {return mStartArc; } public void setStartArc(int startArc) {mStartArc = startArc;invalidate(); } public int getInnerBackgroundColor() {return mInnerBackgroundColor; } public void setInnerBackgroundColor(int innerBackgroundColor) {mInnerBackgroundColor = innerBackgroundColor;invalidate(); } public int getProgressStyle() {return mProgressStyle; } public void setProgressStyle(int progressStyle) {mProgressStyle = progressStyle;invalidate(); } public int getInnerPadding() {return mInnerPadding; } public void setInnerPadding(int innerPadding) {mInnerPadding = Utils.dp2px(getContext(), innerPadding);int mInnerRadius = mRadius - mOuterSize / 2 - mInnerPadding;rectInner = new RectF(-mInnerRadius, -mInnerRadius, mInnerRadius, mInnerRadius);invalidate(); } public int getOuterColor() {return mOuterColor; } public void setOuterColor(int outerColor) {mOuterColor = outerColor;invalidate(); } public int getOuterSize() {return mOuterSize; } public void setOuterSize(int outerSize) {mOuterSize = Utils.dp2px(getContext(), outerSize);invalidate(); } private static final String STATE = 'state'; private static final String PROGRESS_STYLE = 'progressStyle'; private static final String TEXT_COLOR = 'textColor'; private static final String TEXT_SIZE = 'textSize'; private static final String TEXT_SKEW_X = 'textSkewX'; private static final String TEXT_VISIBLE = 'textVisible'; private static final String TEXT_SUFFIX = 'textSuffix'; private static final String TEXT_PREFIX = 'textPrefix'; private static final String REACH_BAR_COLOR = 'reachBarColor'; private static final String REACH_BAR_SIZE = 'reachBarSize'; private static final String NORMAL_BAR_COLOR = 'normalBarColor'; private static final String NORMAL_BAR_SIZE = 'normalBarSize'; private static final String IS_REACH_CAP_ROUND = 'isReachCapRound'; private static final String RADIUS = 'radius'; private static final String START_ARC = 'startArc'; private static final String INNER_BG_COLOR = 'innerBgColor'; private static final String INNER_PADDING = 'innerPadding'; private static final String OUTER_COLOR = 'outerColor'; private static final String OUTER_SIZE = 'outerSize'; @Override public Parcelable onSaveInstanceState() {final Bundle bundle = new Bundle();bundle.putParcelable(STATE, super.onSaveInstanceState());// 保存當前樣式bundle.putInt(PROGRESS_STYLE, getProgressStyle());bundle.putInt(RADIUS, getRadius());bundle.putBoolean(IS_REACH_CAP_ROUND, isReachCapRound());bundle.putInt(START_ARC, getStartArc());bundle.putInt(INNER_BG_COLOR, getInnerBackgroundColor());bundle.putInt(INNER_PADDING, getInnerPadding());bundle.putInt(OUTER_COLOR, getOuterColor());bundle.putInt(OUTER_SIZE, getOuterSize());// 保存text信息bundle.putInt(TEXT_COLOR, getTextColor());bundle.putInt(TEXT_SIZE, getTextSize());bundle.putFloat(TEXT_SKEW_X, getTextSkewX());bundle.putBoolean(TEXT_VISIBLE, isTextVisible());bundle.putString(TEXT_SUFFIX, getTextSuffix());bundle.putString(TEXT_PREFIX, getTextPrefix());// 保存已到達進度信息bundle.putInt(REACH_BAR_COLOR, getReachBarColor());bundle.putInt(REACH_BAR_SIZE, getReachBarSize()); // 保存未到達進度信息bundle.putInt(NORMAL_BAR_COLOR, getNormalBarColor());bundle.putInt(NORMAL_BAR_SIZE, getNormalBarSize());return bundle; } @Override public void onRestoreInstanceState(Parcelable state) {if (state instanceof Bundle) { final Bundle bundle = (Bundle) state; mProgressStyle = bundle.getInt(PROGRESS_STYLE); mRadius = bundle.getInt(RADIUS); mReachCapRound = bundle.getBoolean(IS_REACH_CAP_ROUND); mStartArc = bundle.getInt(START_ARC); mInnerBackgroundColor = bundle.getInt(INNER_BG_COLOR); mInnerPadding = bundle.getInt(INNER_PADDING); mOuterColor = bundle.getInt(OUTER_COLOR); mOuterSize = bundle.getInt(OUTER_SIZE); mTextColor = bundle.getInt(TEXT_COLOR); mTextSize = bundle.getInt(TEXT_SIZE); mTextSkewX = bundle.getFloat(TEXT_SKEW_X); mTextVisible = bundle.getBoolean(TEXT_VISIBLE); mTextSuffix = bundle.getString(TEXT_SUFFIX); mTextPrefix = bundle.getString(TEXT_PREFIX); mReachBarColor = bundle.getInt(REACH_BAR_COLOR); mReachBarSize = bundle.getInt(REACH_BAR_SIZE); mNormalBarColor = bundle.getInt(NORMAL_BAR_COLOR); mNormalBarSize = bundle.getInt(NORMAL_BAR_SIZE); initPaint(); super.onRestoreInstanceState(bundle.getParcelable(STATE)); return;}super.onRestoreInstanceState(state); } @Override public void invalidate() {initPaint();super.invalidate(); }}

3.設置寬高

package com.example.myapplication7; import android.content.Context;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.RectF;import android.graphics.drawable.BitmapDrawable;import android.graphics.drawable.Drawable;import android.text.TextUtils;import android.util.DisplayMetrics;import android.view.WindowManager; import java.util.Collection; import androidx.annotation.ColorRes; public class Utils { private static WindowManager windowManager; private static WindowManager getWindowManager(Context context) {if (windowManager == null) { windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);}return windowManager; } public static float getDensity(Context context) {return context.getResources().getDisplayMetrics().density; } public static float getFontDensity(Context context) {return context.getResources().getDisplayMetrics().scaledDensity; } public static DisplayMetrics getDisplayMetrics(Context context) {DisplayMetrics displayMetrics = new DisplayMetrics();getWindowManager(context).getDefaultDisplay().getMetrics(displayMetrics);return displayMetrics; } public static int dp2px(Context context, float dp) {return (int) (getDensity(context) * dp + 0.5f); } public static int px2dp(Context context, float px) {return (int) (px / getDensity(context) + 0.5f); } public static int sp2px(Context context, float sp) {return (int) (getFontDensity(context) * sp + 0.5f); } public static int px2sp(Context context, float px) {return (int) (px / getFontDensity(context) + 0.5f); } public static int getWindowWidth(Context context) {return getDisplayMetrics(context).widthPixels; } public static int getWindowHeight(Context context) {return getDisplayMetrics(context).heightPixels; } public static String getPathFormat(String path) {if (!TextUtils.isEmpty(path)) { int lastPeriodIndex = path.lastIndexOf(’.’); if (lastPeriodIndex > 0 && lastPeriodIndex + 1 < path.length()) {String format = path.substring(lastPeriodIndex + 1);if (!TextUtils.isEmpty(format)) { return format.toLowerCase();} }}return ''; } public static boolean isGif(String url) {return 'gif'.equals(getPathFormat(url)); } public static Bitmap getTextBitmap(Context context, int width, int height, int radius, String text, int textSize, @ColorRes int bgColor) {radius = dp2px(context, radius);Bitmap bitmap = Bitmap.createBitmap(dp2px(context, width), dp2px(context, height), Bitmap.Config.ARGB_8888);Canvas canvas = new Canvas(bitmap);RectF rect = new RectF(0, 0, canvas.getWidth(), canvas.getHeight());Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);paint.setColor(context.getResources().getColor(bgColor));canvas.drawRoundRect(new RectF(0, 0, rect.width(), rect.height()), radius, radius, paint);paint.setColor(Color.WHITE);paint.setTextSize(dp2px(context, textSize));paint.setTextAlign(Paint.Align.CENTER);Paint.FontMetricsInt fontMetrics = paint.getFontMetricsInt();float baseline = (rect.bottom + rect.top - fontMetrics.bottom - fontMetrics.top) / 2;canvas.drawText(text, rect.centerX(), baseline, paint);return bitmap; } public static Drawable getTextDrawable(Context context, int width, int height, int radius, String text, int textSize, @ColorRes int bgColor) {return new BitmapDrawable(getTextBitmap(context, width, height, radius, text, textSize, bgColor)); } public static boolean isEmpty(Collection<?> collection) {return collection == null || collection.isEmpty(); } public static int getSize(Collection<?> collection) {return collection == null ? 0 : collection.size(); }}

4.主界面

package com.example.myapplication7; import android.graphics.Bitmap;import android.graphics.Color;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.util.Log;import android.view.View; import androidx.annotation.NonNull;import androidx.annotation.Nullable;import androidx.appcompat.app.AppCompatActivity; public class MainActivity extends AppCompatActivity { private String fileName; private CircleProgressView progressView; private Bitmap bitmap; private int i = 0; final Handler handler = new Handler(new Handler.Callback() {@Overridepublic boolean handleMessage(@NonNull Message msg) { if (msg.what == 1) {//do somethingint a = (int) msg.obj;Log.e('TAG', 'handleMessage' + a);progressView.setProgress(a * 10);if (a == 10) { progressView.setVisibility(View.GONE);} } return false;} }); @Override protected void onCreate(@Nullable Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);progressView = findViewById(R.id.progressView);getWindow().setTitleColor(Color.rgb(65, 183, 216));//主線程中調用：new Thread(new MyThread()).start(); } class MyThread extends Thread {//這里也可用Runnable接口實現 @Overridepublic void run() { while (true) {try { Thread.sleep(500);//每隔1s執行一次 Message msg = new Message(); msg.what = 1; i++; msg.obj = i; handler.sendMessage(msg);} catch (InterruptedException e) { e.printStackTrace();} }} } }

5.布局

<?xml version='1.0' encoding='utf-8'?><LinearLayout xmlns:android='http://schemas.android.com/apk/res/android' xmlns:app='http://schemas.android.com/apk/res-auto' android:layout_width='match_parent' android:layout_height='match_parent' android:orientation='vertical'> <com.example.myapplication7.CircleProgressViewandroid: android:layout_width='150dp'android:layout_height='150dp'android:progress='0'app:cpv_innerPadding='2dp'app:cpv_outerColor='@android:color/darker_gray'app:cpv_outerSize='1dp'app:cpv_progressNormalColor='@android:color/darker_gray'app:cpv_progressReachColor='@color/white'app:cpv_progressStyle='FillInnerArc' /> </LinearLayout>

6.資源文件

<?xml version='1.0' encoding='utf-8'?><resources> <declare-styleable name='CircleProgressView'><attr name='cpv_progressNormalColor' format='color' /><attr name='cpv_progressReachColor' format='color' /><attr name='cpv_progressTextColor' format='color' /><attr name='cpv_progressTextSize' format='dimension' /><attr name='cpv_progressTextOffset' format='dimension' /><attr name='cpv_progressNormalSize' format='dimension' /><attr name='cpv_progressReachSize' format='dimension' /><attr name='cpv_radius' format='dimension' /><attr name='cpv_progressTextVisible' format='boolean' /><attr name='cpv_progressStartArc' format='integer' /><attr name='cpv_progressTextSkewX' format='dimension' /><attr name='cpv_progressTextPrefix' format='string' /><attr name='cpv_progressTextSuffix' format='string' /><attr name='cpv_innerBackgroundColor' format='color' /><attr name='cpv_progressStyle' format='enum'> <enum name='Normal' value='0' /> <enum name='FillInner' value='1' /> <enum name='FillInnerArc' value='2' /></attr><attr name='cpv_innerProgressColor' format='color' /><attr name='cpv_innerPadding' format='dimension' /><attr name='cpv_outerColor' format='color' /><attr name='cpv_outerSize' format='dimension' /><attr name='cpv_reachCapRound' format='boolean' /> </declare-styleable> </resources>

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持好吧啦網。