Android-------自定义View圆形进度条
详情见链接：http://blog.****.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); } }