自定義Android圓形進度條(附源碼)

2020-04-11 11:12:21

字體：大中小

來源：轉載

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本文實例講述了Android自定義圓形進度條，分享給大家供大家參考。具體如下：
運行效果截圖如下：

具體代碼如下：

自定義的View:

import com.example.circlepregress.R;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.util.AttributeSet;import android.util.Log;import android.view.View;public class RoundProgressBar extends View { // 畫筆對象的引用 private Paint paint; // 圓環的顏色 private int roundColor; // 圓環進度的顏色 private int roundProgressColor; // 中間進度百分比的字符串的顏色 private int textColor; // 中間進度百分比的字符串的字體 private float textSize; // 圓環的寬度 private float roundWidth; // 最大進度 private int max; // 當前進度 private int progress; // 是否顯示中間的進度 private boolean textIsDisplayable; // 進度的風格，實心或者空心 private int style; public static final int STROKE = 0; public static final int FILL = 1; /** * 構造方法 */ public RoundProgressBar(Context context) { this(context, null); } public RoundProgressBar(Context context, AttributeSet attrs) { this(context, attrs, 0); } public RoundProgressBar(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); paint = new Paint(); TypedArray mTypedArray = context.obtainStyledAttributes(attrs,  R.styleable.RoundProgressBar); // 獲取自定義屬性和默認值 roundColor = mTypedArray.getColor(  R.styleable.RoundProgressBar_roundColor, Color.RED); roundProgressColor = mTypedArray.getColor(  R.styleable.RoundProgressBar_roundProgressColor, Color.GREEN); textColor = mTypedArray.getColor(  R.styleable.RoundProgressBar_textColor, Color.GREEN); textSize = mTypedArray.getDimension(  R.styleable.RoundProgressBar_textSize, 15); roundWidth = mTypedArray.getDimension(  R.styleable.RoundProgressBar_roundWidth, 5); max = mTypedArray.getInteger(R.styleable.RoundProgressBar_max, 100); textIsDisplayable = mTypedArray.getBoolean(  R.styleable.RoundProgressBar_textIsDisplayable, true); style = mTypedArray.getInt(R.styleable.RoundProgressBar_style, 0); mTypedArray.recycle(); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); // 畫最外層的大圓環 int centre = getWidth() / 2; // 獲取圓心的x坐標 int radius = (int) (centre - roundWidth / 2); // 圓環的半徑 paint.setColor(roundColor); // 設置圓環的顏色 paint.setStyle(Paint.Style.STROKE); // 設置空心 paint.setStrokeWidth(roundWidth); // 設置圓環的寬度 paint.setAntiAlias(true); // 消除鋸齒 canvas.drawCircle(centre, centre, radius, paint); // 畫出圓環 Log.e("log", centre + ""); /**  * 畫進度百分比  */ paint.setStrokeWidth(0); paint.setColor(textColor); paint.setTextSize(textSize); paint.setTypeface(Typeface.DEFAULT_BOLD); // 設置字體 int percent = (int) (((float) progress / (float) max) * 100); // 中間的進度百分比，先轉換成float在進行除法運算，不然都為0 float textWidth = paint.measureText(percent + "%"); // 測量字體寬度，我們需要根據字體的寬度設置在圓環中間 if (textIsDisplayable && percent != 0 && style == STROKE) {  canvas.drawText(percent + "%", centre - textWidth / 2, centre   + textSize / 2, paint); // 畫出進度百分比 } /**  * 畫圓弧 ，畫圓環的進度  */ // 設置進度是實心還是空心 paint.setStrokeWidth(roundWidth); // 設置圓環的寬度 paint.setColor(roundProgressColor); // 設置進度的顏色 RectF oval = new RectF(centre - radius, centre - radius, centre  + radius, centre + radius); // 用于定義的圓弧的形狀和大小的界限 switch (style) { case STROKE: {  paint.setStyle(Paint.Style.STROKE);  canvas.drawArc(oval, 0, 360 * progress / max, false, paint); // 根據進度畫圓弧  break; } case FILL: {  paint.setStyle(Paint.Style.FILL_AND_STROKE);  if (progress != 0)  canvas.drawArc(oval, 0, 360 * progress / max, true, paint); // 根據進度畫圓弧  break; } } } public synchronized int getMax() { return max; } /** * 設置進度的最大值 *  * @param max */ public synchronized void setMax(int max) { if (max < 0) {  throw new IllegalArgumentException("max not less than 0"); } this.max = max; } /** * 獲取進度.需要同步 *  * @return */ public synchronized int getProgress() { return progress; } /** * 設置進度，此為線程安全控件，由于考慮多線的問題，需要同步 刷新界面調用postInvalidate()能在非UI線程刷新 *  * @param progress */ public synchronized void setProgress(int progress) { if (progress < 0) {  throw new IllegalArgumentException("progress not less than 0"); } if (progress > max) {  progress = max; } if (progress <= max) {  this.progress = progress;  postInvalidate(); } } /******************** 下邊是屬性的get、set方法 ***************/ public int getCricleColor() { return roundColor; } public void setCricleColor(int cricleColor) { this.roundColor = cricleColor; } public int getCricleProgressColor() { return roundProgressColor; } public void setCricleProgressColor(int cricleProgressColor) { this.roundProgressColor = cricleProgressColor; } public int getTextColor() { return textColor; } public void setTextColor(int textColor) { this.textColor = textColor; } public float getTextSize() { return textSize; } public void setTextSize(float textSize) { this.textSize = textSize; } public float getRoundWidth() { return roundWidth; } public void setRoundWidth(float roundWidth) { this.roundWidth = roundWidth; }}

所需要的資源文件：attrs.xml

<?xml version="1.0" encoding="UTF-8"?><resources> <declare-styleable name="RoundProgressBar"> <attr name="roundColor" format="color" /> <attr name="roundProgressColor" format="color" /> <attr name="roundWidth" format="dimension"></attr> <attr name="textColor" format="color" /> <attr name="textSize" format="dimension" /> <attr name="max" format="integer"></attr> <attr name="textIsDisplayable" format="boolean"></attr> <attr name="style">  <enum name="STROKE" value="0"></enum>  <enum name="FILL" value="1"></enum> </attr> </declare-styleable></resources>

布局文件如下：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:android_custom="http://schemas.android.com/apk/res/com.example.circlepregress" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" > <com.example.roundprogressbar.RoundProgressBar android:id="@+id/roundProgressBar2" android:layout_width="80dip" android:layout_height="80dip" android:layout_alignLeft="@+id/roundProgressBar1" android:layout_alignParentBottom="true" android:layout_marginBottom="78dp" android_custom:roundColor="#D1D1D1" android_custom:roundProgressColor="@android:color/black" android_custom:roundWidth="10dip" android_custom:textColor="#9A32CD" android_custom:textSize="18sp" /> <com.example.roundprogressbar.RoundProgressBar android:id="@+id/roundProgressBar4" android_custom:style="FILL" android:layout_width="80dip" android:layout_height="80dip" android:layout_alignParentRight="true" android:layout_alignTop="@+id/roundProgressBar1" android:layout_marginRight="32dp" android_custom:roundProgressColor="#C2C2C2" android_custom:roundWidth="1dip" /> <com.example.roundprogressbar.RoundProgressBar android:id="@+id/roundProgressBar3" android:layout_width="80dip" android:layout_height="80dip" android:layout_alignLeft="@+id/roundProgressBar4" android:layout_alignTop="@+id/roundProgressBar2" android_custom:roundColor="#C6E2FF" android_custom:roundProgressColor="#CD3333" android_custom:roundWidth="10dip" android_custom:textIsDisplayable="false" /> <com.example.roundprogressbar.RoundProgressBar android:id="@+id/roundProgressBar5" android:layout_width="50dip" android:layout_height="50dip" android:layout_below="@+id/roundProgressBar1" android:layout_marginLeft="22dp" android:layout_toRightOf="@+id/roundProgressBar1" /> <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentRight="true" android:layout_alignParentTop="true" android:text="Button" /> <com.example.roundprogressbar.RoundProgressBar android:id="@+id/roundProgressBar1" android:layout_width="80dip" android:layout_height="80dip" android:layout_alignParentLeft="true" android:layout_below="@+id/button1" android:layout_marginLeft="16dp" android:layout_marginTop="40dp" /></RelativeLayout>

其中我們使用了這一句：

復制代碼代碼如下:

xmlns:android_custom=http://schemas.android.com/apk/res/com.example.circlepregress

xmlns:android_custom是我們自己定義的標簽，res/com.example.circlepregress其中res/后邊的就是我們自定義View所在的目錄

MainActivity.java如下：

import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import com.example.circlepregress.R;public class MainActivity extends Activity { private RoundProgressBar mRoundProgressBar1, mRoundProgressBar2 ,mRoundProgressBar3, mRoundProgressBar4, mRoundProgressBar5; private int progress = 0; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_cricle_progress); mRoundProgressBar1 = (RoundProgressBar) findViewById(R.id.roundProgressBar1); mRoundProgressBar2 = (RoundProgressBar) findViewById(R.id.roundProgressBar2); mRoundProgressBar3 = (RoundProgressBar) findViewById(R.id.roundProgressBar3); mRoundProgressBar4 = (RoundProgressBar) findViewById(R.id.roundProgressBar4); mRoundProgressBar5 = (RoundProgressBar) findViewById(R.id.roundProgressBar5); ((Button)findViewById(R.id.button1)).setOnClickListener(new OnClickListener() {  @Override  public void onClick(View v) {  new Thread(new Runnable() {   @Override   public void run() {   while(progress <= 100){    progress += 3;    System.out.println(progress);    mRoundProgressBar1.setProgress(progress);    mRoundProgressBar2.setProgress(progress);    mRoundProgressBar3.setProgress(progress);    mRoundProgressBar4.setProgress(progress);    mRoundProgressBar5.setProgress(progress);    try {    Thread.sleep(100);    } catch (InterruptedException e) {    e.printStackTrace();    }   }   }  }).start();  } }); }}

項目免費下載：《Android自定義圓形進度條》

希望本文所述對大家學習Android軟件編程有所幫助。

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