Android自定義帶動畫效果的圓形ProgressBar
阿新 • • 發佈：2020-05-18
本文例項為大家分享了Android自定義帶動畫效果的圓形ProgressBar，供大家參考，具體內容如下
最近有個需求顯示進度，尾部還要有一標示，像下邊這樣
使用自定義View的方式實現，程式碼如下，很簡單註釋的很清楚
文章最後我們拓展一下功能，實現一個帶動畫效果的進度條
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;
/**
* 中間的文字
*/
private String mText;
/**
* 外圓顏色
*/
private int outRoundColor;
/**
* 內圓的顏色
*/
private int inRoundColor;
/**
* 線的寬度
*/
private int roundWidth;
private int style;
/**
* 字型顏色
*/
private int textColor;
/**
* 字型大小
*/
private float textSize;
/**
* 字型是否加粗
*/
private boolean isBold;
/**
* 進度條顏色
*/
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,defStyleAttr);
mContext = context;
init(attrs);
}
@TargetApi(21)
public CircleProgressBar(Context context,int defStyleAttr,int defStyleRes) {
super(context,defStyleAttr,defStyleRes);
mContext = context;
init(attrs);
}
/**
* 解析自定義屬性
*
* @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) {
/**
* 畫外圓
*/
super.onDraw(canvas);
int center = getWidth() / 2; //圓心
int radius = (center - roundWidth / 2); //半徑
mPaint.setColor(outRoundColor); //外圓顏色
mPaint.setStrokeWidth(roundWidth); //線的寬度
mPaint.setStyle(Paint.Style.STROKE); //空心圓
mPaint.setAntiAlias(true); //消除鋸齒
canvas.drawCircle(center,center,radius,mPaint);
//內圓
mPaint.setColor(inRoundColor);
radius = radius - roundWidth;
canvas.drawCircle(center,mPaint);
//畫進度是一個弧線
mPaint.setColor(progressBarColor);
RectF rectF = new RectF(center - radius,center - radius,center + radius,center + radius);//圓弧範圍的外接矩形
canvas.drawArc(rectF,-90,mAngle,false,mPaint);
canvas.save(); //平移畫布之前儲存之前畫的
//畫進度終點的小球,旋轉畫布的方式實現
mPaint.setStyle(Paint.Style.FILL);
//將畫布座標原點移動至圓心
canvas.translate(center,center);
//旋轉和進度相同的角度，因為進度是從-90度開始的所以-90度
canvas.rotate(mAngle - 90);
//同理從圓心出發直接將原點平移至要畫小球的位置
canvas.translate(radius,0);
canvas.drawCircle(0,roundWidth,mPaint);
//畫完之後恢復畫布座標
canvas.restore();
//畫文字將座標平移至圓心
canvas.translate(center,center);
mPaint.setStrokeWidth(0);
mPaint.setColor(textColor);
if (isBold) {
//字型加粗
mPaint.setTypeface(Typeface.DEFAULT_BOLD);
}
if (TextUtils.isEmpty(mText)) {
mText = mProgress + "%";
}
//動態設定文字長為圓半徑，計算字型大小
float textLength = mText.length();
textSize = radius / textLength;
mPaint.setTextSize(textSize);
//將文字畫到中間
float textWidth = mPaint.measureText(mText);
canvas.drawText(mText,-textWidth / 2,textSize / 2,mPaint);
}
public int getmProgress() {
return mProgress;
}
/**
* 設定進度
*
* @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;
}
/**
* 設定文字
*
* @param mText
*/
public void setmText(String mText) {
this.mText = mText;
}
/**
* 設定帶動畫的進度
* @param p
*/
public void setAnimProgress(int p) {
if (p > MAX_PROGRESS) {
mProgress = MAX_PROGRESS;
} else {
mProgress = p;
}
//設定屬性動畫
ValueAnimator valueAnimator = new ValueAnimator().ofInt(0,p);
//動畫從快到慢
valueAnimator.setInterpolator(new DecelerateInterpolator());
valueAnimator.setDuration(3000);
//監聽值的變化
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();
}
}自定義屬性
<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>佈局檔案中使用
<?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中設定進度，顯示文字
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()+"%");
}
}
效果圖
拓展
拓展也很簡單，加一個setAnimProgress(int p)設定動畫效果:
/**
* 設定帶動畫的進度
* @param p
*/
public void setAnimProgress(int p) {
if (p > MAX_PROGRESS) {
mProgress = MAX_PROGRESS;
} else {
mProgress = p;
}
//設定屬性動畫
ValueAnimator valueAnimator = new ValueAnimator().ofInt(0,"current" + currentV);
mAngle = 360 * currentV / MAX_PROGRESS;
mText = currentV + "%";
invalidate();
}
});
valueAnimator.start();
}
在activity中呼叫這個方法
circleProgressBar.setAnimProgress(65);
效果如下
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支援我們。