Android-------自定义View圆形进度条

来源：互联网发布：linux教程有什么编辑：程序博客网时间：2024/05/01 03:34
详情见链接：http://blog.csdn.net/xiaanming/article/details/10298163
1.在values下面新建一个attrs.xml，现在里面定义我们的属性，不同的属性对应不同的format，
<?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>2.自定义View类public class RoundProgressBar extends View {    /**     * 画笔对象的引用     */    private Paint paint;    /**     * 圆环的颜色     */    private int roundColor;    /**     * 圆环进度的颜色     */    private int roundProgressColor;    /**     * 中间进度百分比的字符串的颜色     */    private int textColor;    /**     * 中间进度百分比的字符串的字体     */    private float textSize;    /**     * 圆环的宽度     */    private float roundWidth;    /**     * 最大进度     */    private int max;    /**     * 当前进度     */    private int progress;    /**     * 是否显示中间的进度     */    private boolean textIsDisplayable;    /**     * 进度的风格，实心或者空心     */    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 defStyleAttr) {        super(context, attrs, defStyleAttr);        paint=new Paint();        TypedArray mTypedArray = context.obtainStyledAttributes(attrs,                R.styleable.RoundProgressBar);        //获取自定义属性和默认值        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);        /**         * 画最外层的大圆环         */        int centre = getWidth()/2; //获取圆心的x坐标        int radius = (int) (centre - roundWidth/2); //圆环的半径        paint.setColor(roundColor); //设置圆环的颜色        paint.setStyle(Paint.Style.STROKE); //设置空心        paint.setStrokeWidth(roundWidth); //设置圆环的宽度        paint.setAntiAlias(true);  //消除锯齿        canvas.drawCircle(centre, centre, radius, paint); //画出圆环        Log.e("log", centre + "");        /**         * 画进度百分比         */        paint.setStrokeWidth(0);        paint.setColor(textColor);        paint.setTextSize(textSize);        paint.setTypeface(Typeface.DEFAULT_BOLD); //设置字体        int percent = (int)(((float)progress / (float)max) * 100);  //中间的进度百分比，先转换成float在进行除法运算，不然都为0        float textWidth = paint.measureText(percent + "%");   //测量字体宽度，我们需要根据字体的宽度设置在圆环中间        if(textIsDisplayable && percent != 0 && style == STROKE){            canvas.drawText(percent + "%", centre - textWidth / 2, centre + textSize/2, paint); //画出进度百分比        }        /**         * 画圆弧 ，画圆环的进度         */        //设置进度是实心还是空心        paint.setStrokeWidth(roundWidth); //设置圆环的宽度        paint.setColor(roundProgressColor);  //设置进度的颜色        RectF oval = new RectF(centre - radius, centre - radius, centre                + radius, centre + radius);  //用于定义的圆弧的形状和大小的界限        switch (style) {            case STROKE:{                paint.setStyle(Paint.Style.STROKE);                canvas.drawArc(oval, 0, 360 * progress / max, false, paint);  //根据进度画圆弧                break;            }            case FILL:{                paint.setStyle(Paint.Style.FILL_AND_STROKE);                if(progress !=0)                    canvas.drawArc(oval, 0, 360 * progress / max, true, paint);  //根据进度画圆弧                break;            }        }    }    public synchronized int getMax() {        return max;    }    /**     * 设置进度的最大值     * @param max     */    public synchronized void setMax(int max) {        if(max < 0){            throw new IllegalArgumentException("max not less than 0");        }        this.max = max;    }    /**     * 获取进度.需要同步     * @return     */    public synchronized int getProgress() {        return progress;    }    /**     * 设置进度，此为线程安全控件，由于考虑多线的问题，需要同步     * 刷新界面调用postInvalidate()能在非UI线程刷新     * @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;    }}
3.自定义View在XML中使用情况
<?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:app="http://schemas.android.com/apk/res-auto"    android:id="@+id/activity_main"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.baway.MainActivity">    <Button        android:id="@+id/left"        android:text="循环"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <Button        android:id="@+id/right"        android:text="停止"        android:layout_alignParentRight="true"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <com.baway.RoundProgressBar        android:id="@+id/roundprogreebar"        android:layout_width="200dp"        android:layout_height="200dp"        android:layout_centerHorizontal="true"        android:layout_marginTop="100dp"        app:roundColor="#D1D1D1"        app:roundProgressColor="@android:color/black"        app:textColor="#9A32CD"        app:textIsDisplayable="true"        app:roundWidth="10dip"        app:textSize="18sp"        /></RelativeLayout>

4.主界面中
public class MainActivity extends AppCompatActivity {    private RoundProgressBar progressBar;    private int i;    private Button mLeft;    private Button mRiht;    private Timer timer ;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initData();    }    private void initData() {        progressBar = (RoundProgressBar) findViewById(R.id.roundprogreebar);        mLeft = (Button) findViewById(R.id.left);        mRiht = (Button) findViewById(R.id.right);        progressBar.setMax(100);        progressBar.setCricleColor(Color.YELLOW);        progressBar.setTextColor(Color.BLACK);        progressBar.setTextSize(20);        mLeft.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                if(progressBar.getProgress()==100){                    setLoo();                }else{                    setAdd();                }            }        });        mRiht.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                timer.cancel();            }        });    }    private void setAdd() {        timer = new Timer();        timer.schedule(new TimerTask() {            @Override            public void run() {                if(i<=30){                    progressBar.setCricleProgressColor(Color.GREEN);                }                if(i>30&&i<60){                    progressBar.setCricleProgressColor(Color.BLUE);                }                if(i>60) {                    progressBar.setCricleProgressColor(Color.RED);                }                progressBar.setProgress(i);                if(i==100){                    progressBar.setCricleProgressColor(Color.BLACK);                    setLoo();                }                i+=10;            }        },0,1000);    }    private void setLoo() {        timer.schedule(new TimerTask() {            @Override            public void run() {                i-=10;                if(i<=30){                    progressBar.setCricleProgressColor(Color.GREEN);                }                if(i>30&&i<60){                    progressBar.setCricleProgressColor(Color.BLUE);                }                if(i>60) {                    progressBar.setCricleProgressColor(Color.RED);                }                progressBar.setProgress(i);                if(i==0){                    progressBar.setCricleProgressColor(Color.WHITE);                    setAdd();                }            }        },0,1000);    }}
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