本文实例为大家分享了Android自定义带动画效果的圆形ProgressBar，供大家参考，具体内容如下
最近有个需求显示进度，尾部还要有一标示，像下边这样
使用自定义View的方式实现，代码如下，很简单注释的很清楚
文章最后我们拓展一下功能，实现一个带动画效果的进度条
package com.example.fwc.allexample.progressbar; import android.animation.ValueAnimator; import android.annotation.TargetApi; 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.graphics.Typeface; import android.os.Handler; import android.os.Message; import android.text.TextUtils; import android.util.AttributeSet; import android.util.Log; import android.view.View; import android.view.animation.DecelerateInterpolator; import com.example.fwc.allexample.R; /** * Created by fwc on 2016/7/6. */ public class CircleProgressBar extends View { private Context mContext; private Paint mPaint; private int mProgress = 0; private static int MAX_PROGRESS = 100; /** * 弧度 */ private int mAngle; /** * 中间的文字 */ private String mText; /** * 外圆颜色 */ private int outRoundColor; /** * 内圆的颜色 */ private int inRoundColor; /** * 线的宽度 */ private int roundWidth; private int style; /** * 字体颜色 */ private int textColor; /** * 字体大小 */ private float textSize; /** * 字体是否加粗 */ private boolean isBold; /** * 进度条颜色 */ private int progressBarColor; public CircleProgressBar(Context context) { this(context, null); } public CircleProgressBar(Context context, AttributeSet attrs) { this(context, attrs, 0); } public CircleProgressBar(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); mContext = context; init(attrs); } @TargetApi(21) public CircleProgressBar(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { super(context, attrs, defStyleAttr, defStyleRes); mContext = context; init(attrs); } /** * 解析自定义属性 * * @param attrs */ public void init(AttributeSet attrs) { mPaint = new Paint(); TypedArray typedArray = mContext.obtainStyledAttributes(attrs, R.styleable.CircleProgressBar); outRoundColor = typedArray.getColor(R.styleable.CircleProgressBar_outCircleColor, getResources().getColor(R.color.colorPrimary)); inRoundColor = typedArray.getColor(R.styleable.CircleProgressBar_inCircleColor, getResources().getColor(R.color.colorPrimaryDark)); progressBarColor = typedArray.getColor(R.styleable.CircleProgressBar_progressColor, getResources().getColor(R.color.colorAccent)); isBold = typedArray.getBoolean(R.styleable.CircleProgressBar_textBold, false); textColor = typedArray.getColor(R.styleable.CircleProgressBar_textColor, Color.BLACK); roundWidth = typedArray.getDimensionPixelOffset(R.styleable.CircleProgressBar_lineWidth, 20); typedArray.recycle(); } @Override protected void onDraw(Canvas canvas) { /** * 画外圆 */ super.onDraw(canvas); int center = getWidth() / 2; //圆心 int radius = (center - roundWidth / 2); //半径 mPaint.setColor(outRoundColor); //外圆颜色 mPaint.setStrokeWidth(roundWidth); //线的宽度 mPaint.setStyle(Paint.Style.STROKE); //空心圆 mPaint.setAntiAlias(true); //消除锯齿 canvas.drawCircle(center, center, radius, mPaint); //内圆 mPaint.setColor(inRoundColor); radius = radius - roundWidth; canvas.drawCircle(center, center, radius, mPaint); //画进度是一个弧线 mPaint.setColor(progressBarColor); RectF rectF = new RectF(center - radius, center - radius, center + radius, center + radius);//圆弧范围的外接矩形 canvas.drawArc(rectF, -90, mAngle, false, mPaint); canvas.save(); //平移画布之前保存之前画的 //画进度终点的小球,旋转画布的方式实现 mPaint.setStyle(Paint.Style.FILL); //将画布坐标原点移动至圆心 canvas.translate(center, center); //旋转和进度相同的角度，因为进度是从-90度开始的所以-90度 canvas.rotate(mAngle - 90); //同理从圆心出发直接将原点平移至要画小球的位置 canvas.translate(radius, 0); canvas.drawCircle(0, 0, roundWidth, mPaint); //画完之后恢复画布坐标 canvas.restore(); //画文字将坐标平移至圆心 canvas.translate(center, center); mPaint.setStrokeWidth(0); mPaint.setColor(textColor); if (isBold) { //字体加粗 mPaint.setTypeface(Typeface.DEFAULT_BOLD); } if (TextUtils.isEmpty(mText)) { mText = mProgress + "%"; } //动态设置文字长为圆半径，计算字体大小 float textLength = mText.length(); textSize = radius / textLength; mPaint.setTextSize(textSize); //将文字画到中间 float textWidth = mPaint.measureText(mText); canvas.drawText(mText, -textWidth / 2, textSize / 2, mPaint); } public int getmProgress() { return mProgress; } /** * 设置进度 * * @return */ public void setmProgress(int p) { if (p > MAX_PROGRESS) { mProgress = MAX_PROGRESS; mAngle = 360; } else { mProgress = p; mAngle = 360 * p / MAX_PROGRESS; } } public String getmText() { return mText; } /** * 设置文本 * * @param mText */ public void setmText(String mText) { this.mText = mText; } /** * 设置带动画的进度 * @param p */ public void setAnimProgress(int p) { if (p > MAX_PROGRESS) { mProgress = MAX_PROGRESS; } else { mProgress = p; } //设置属性动画 ValueAnimator valueAnimator = new ValueAnimator().ofInt(0, p); //动画从快到慢 valueAnimator.setInterpolator(new DecelerateInterpolator()); valueAnimator.setDuration(3000); //监听值的变化 valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator animation) { int currentV = (Integer) animation.getAnimatedValue(); Log.e("fwc", "current" + currentV); mAngle = 360 * currentV / MAX_PROGRESS; mText = currentV + "%"; invalidate(); } }); valueAnimator.start(); } }
自定义属性
<declare-styleable name="CircleProgressBar">
<attr name="outCircleColor" format="color"></attr>
<attr name="inCircleColor" format="color"></attr>
<attr name="progressColor" format="color"></attr>
<attr name="textColor" format="color"></attr>
<attr name="textBold" format="boolean"></attr>
<attr name="lineWidth" format="dimension"></attr>
</declare-styleable>
布局文件中使用
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" xmlns:my="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.example.fwc.allexample.progressbar.ProgressActivtiy"> <com.example.fwc.allexample.progressbar.CircleProgressBar android:id="@+id/progress_bar" android:layout_centerInParent="true" android:layout_width="150dp" android:layout_height="150dp" my:inCircleColor="#DCDCDC" my:outCircleColor="#F0F0F0" my:progressColor="#50CE7B" my:textBold="true" my:textColor="#50CE7B" my:lineWidth="5dp" /> </RelativeLayout>
activity中设置进度，显示文字
package com.example.fwc.allexample.progressbar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import com.example.fwc.allexample.R;
public class ProgressActivtiy extends AppCompatActivity {
CircleProgressBar circleProgressBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_progress_activtiy);
circleProgressBar = (CircleProgressBar)findViewById(R.id.progress_bar);
circleProgressBar.setProgress(65);
circleProgressBar.setmText(circleProgressBar.getProgress()+"%");
}
}
效果图
拓展
拓展也很简单，加一个setAnimProgress(int p)设置动画效果:
/**
* 设置带动画的进度
* @param p
*/
public void setAnimProgress(int p) {
if (p > MAX_PROGRESS) {
mProgress = MAX_PROGRESS;
} else {
mProgress = p;
}
//设置属性动画
ValueAnimator valueAnimator = new ValueAnimator().ofInt(0, p);
//动画从快到慢
valueAnimator.setInterpolator(new DecelerateInterpolator());
valueAnimator.setDuration(3000);
//监听值的变化
valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
int currentV = (Integer) animation.getAnimatedValue();
Log.e("fwc", "current" + currentV);
mAngle = 360 * currentV / MAX_PROGRESS;
mText = currentV + "%";
invalidate();
}
});
valueAnimator.start();
}
在activity中调用这个方法
circleProgressBar.setAnimProgress(65);
效果如下
