Android自定義環形進度條

package com.qiao.circleprogress_forexample;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
/**
 * 主頁面
 * @author 有點涼了
 *
 */
public class MainActivity extends Activity {
    private RoundProgressBar progressBar1;
    private  int progress = 0;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        progressBar1 = (RoundProgressBar) findViewById(R.id.progressBar1);
        new Thread(new Runnable() {

            @Override
            public void run() {
                while (progress<=59) {
                    progress+=1;
                    progressBar1.setProgress(progress);
                    try {
                        Thread.sleep(100);
                    } catch (InterruptedException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }
            }
        }).start();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

自定義頁面

package com.qiao.circleprogress_forexample;

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;


/**
 * 仿iphone帶進度的進度條，線程安全的View，可直接在線程中更新進度
 * @author 有點涼了
 *
 */
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;

    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.WHITE);
        roundProgressColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundProgressColor, Color.BLUE);
        textColor = mTypedArray.getColor(R.styleable.RoundProgressBar_textColor, Color.BLACK);
        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座標
        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，不然都爲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);  //用於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，此爲線程安全控件，由於考慮多線的問題，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();
        }

    }


    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;
    }



}

佈局：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <com.qiao.circleprogress_forexample.RoundProgressBar
        android:id="@+id/progressBar1"
        android:layout_width="100dip"
        android:layout_height="100dip"
       />

</LinearLayout>

屬性

<?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>