自定义View圆形进度条

package recitewords.apj.com.recitewords.view; /** * Created by Seven on 2016/12/2. */ import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.RectF; import android.text.TextUtils; import android.util.AttributeSet; import android.view.View; /** * Created by Seven on 2016/12/2. */ public class CircleProgressView extends View { private static final String TAG = "CircleProgressBar"; private int mMaxProgress = 100; private int mProgress = 0; private final int mCircleLineStrokeWidth = 8; private final int mTxtStrokeWidth = 2; // 画圆所在的距形区域 private final RectF mRectF; private final Paint mPaint; private final Context mContext; private String mTxtHint1; private String mTxtHint2; public CircleProgressView(Context context, AttributeSet attrs) { super(context, attrs); mContext = context; mRectF = new RectF(); mPaint = new Paint(); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); int width = this.getWidth(); int height = this.getHeight(); if (width != height) { int min = Math.min(width, height); width = min; height = min; } // 设置画笔相关属性 mPaint.setAntiAlias(true); mPaint.setColor(Color.rgb(0xe9, 0xe9, 0xe9)); canvas.drawColor(Color.TRANSPARENT); mPaint.setStrokeWidth(mCircleLineStrokeWidth); mPaint.setStyle(Paint.Style.STROKE); // 位置 mRectF.left = mCircleLineStrokeWidth / 2; // 左上角x mRectF.top = mCircleLineStrokeWidth / 2; // 左上角y mRectF.right = width - mCircleLineStrokeWidth / 2; // 左下角x mRectF.bottom = height - mCircleLineStrokeWidth / 2; // 右下角y // 绘制圆圈，进度条背景 canvas.drawArc(mRectF, -90, 360, false, mPaint); mPaint.setColor(Color.rgb(0xf8, 0x60, 0x30)); canvas.drawArc(mRectF, -90, ((float) mProgress / mMaxProgress) * 360, false, mPaint); // 绘制进度文案显示 mPaint.setStrokeWidth(mTxtStrokeWidth); String text = mProgress + "%"; int textHeight = height / 4; mPaint.setTextSize(textHeight); int textWidth = (int) mPaint.measureText(text, 0, text.length()); mPaint.setStyle(Paint.Style.FILL); canvas.drawText(text, width / 2 - textWidth / 2, height / 2 + textHeight / 2, mPaint); if (!TextUtils.isEmpty(mTxtHint1)) { mPaint.setStrokeWidth(mTxtStrokeWidth); text = mTxtHint1; textHeight = height / 8; mPaint.setTextSize(textHeight); mPaint.setColor(Color.rgb(0x99, 0x99, 0x99)); textWidth = (int) mPaint.measureText(text, 0, text.length()); mPaint.setStyle(Paint.Style.FILL); canvas.drawText(text, width / 2 - textWidth / 2, height / 4 + textHeight / 2, mPaint); } if (!TextUtils.isEmpty(mTxtHint2)) { mPaint.setStrokeWidth(mTxtStrokeWidth); text = mTxtHint2; textHeight = height / 8; mPaint.setTextSize(textHeight); textWidth = (int) mPaint.measureText(text, 0, text.length()); mPaint.setStyle(Paint.Style.FILL); canvas.drawText(text, width / 2 - textWidth / 2, 3 * height / 4 + textHeight / 2, mPaint); } } public int getMaxProgress() { return mMaxProgress; } public void setMaxProgress(int maxProgress) { this.mMaxProgress = maxProgress; } public void setProgress(int progress) { this.mProgress = progress; this.invalidate(); } public void setProgressNotInUiThread(int progress) { this.mProgress = progress; this.postInvalidate(); } public String getmTxtHint1() { return mTxtHint1; } public void setmTxtHint1(String mTxtHint1) { this.mTxtHint1 = mTxtHint1; } public String getmTxtHint2() { return mTxtHint2; } public void setmTxtHint2(String mTxtHint2) { this.mTxtHint2 = mTxtHint2; } }

以上是自定义View的源码。

在布局文件的引用如下：

<recitewords.apj.com.recitewords.view.CircleProgressView android:id="@+id/review_progress" android:layout_width="80dp" android:layout_height="80dp" android:layout_gravity="center">

在Activity设置进度：

holder.progress.setProgress(25);

可用Handler来动态设置进度。