Android自定义控件（实现状态提示图表）

/** * Author    : yanbo * Date     : 2015-06-03 * Time     : 09:22 * Description : 自定义区域描述图表View */public class AreaChartsView extends View {  private Paint mPaint;  private int[] mZeroPos = new int[2];  private int[] mMaxYPos = new int[2];  private int[] mMaxXPos = new int[2];  private int mWidth, mHight;  private int mRealWidth, mRealHight;  private String mTitleY, mTitleX;  private ArrayList<Integer> mXLevel = new ArrayList<>();  private ArrayList<Integer> mYLevel = new ArrayList<>();  private ArrayList<String> mGridLevelText = new ArrayList<>();  private ArrayList<Integer> mGridColorLevel = new ArrayList<>();  private ArrayList<Integer> mGridTxtColorLevel = new ArrayList<>();  private int mGridLevel = mXLevel.size() - 1;  //title字符大小  private int mXYTitleTextSize = 40;  private int mMeasureXpos, mMeasureYpos;  public AreaChartsView(Context context, AttributeSet attrs) {    super(context, attrs);    mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);    mPaint.setAntiAlias(true);    mPaint.setFilterBitmap(true);  }  @Override  protected void onLayout(boolean changed, int left, int top, int right, int bottom) {    super.onLayout(changed, left, top, right, bottom);    mWidth = getWidth();    mHight = getHeight();  }  @Override  protected void onDraw(Canvas canvas) {    super.onDraw(canvas);    initPosition();    drawXYTitle(canvas);    drawXYLine(canvas);    drawContent(canvas);  }  private void initPosition() {    //初始化坐标图的xy交点原点坐标    mZeroPos[0] = mXYTitleTextSize * 2;    mZeroPos[1] = mHight - mXYTitleTextSize * 4;    //初始化坐标图的X轴最大值坐标    mMaxXPos[0] = mWidth;    mMaxXPos[1] = mHight - mXYTitleTextSize * 4;    //初始化坐标图的Y轴最大值坐标    mMaxYPos[0] = mXYTitleTextSize * 2;    mMaxYPos[1] = mXYTitleTextSize * 2;  }  private void drawXYTitle(Canvas canvas) {    mPaint.setColor(Color.parseColor("#1FB0E7"));    mPaint.setTextSize(mXYTitleTextSize);    mPaint.setTextAlign(Paint.Align.LEFT);    //画Y轴顶的title    canvas.drawText(mTitleY, mMaxYPos[0] - mXYTitleTextSize * 2, mMaxYPos[1] - mXYTitleTextSize, mPaint);    mPaint.setTextAlign(Paint.Align.RIGHT);    //画X轴顶的title    canvas.drawText(mTitleX, mMaxXPos[0], mMaxXPos[1] + mXYTitleTextSize * 2, mPaint);  }  private void drawXYLine(Canvas canvas) {    mPaint.setColor(Color.DKGRAY);    mPaint.setTextAlign(Paint.Align.RIGHT);    //画XY轴    canvas.drawLine(mMaxYPos[0], mMaxYPos[1], mZeroPos[0], mZeroPos[1], mPaint);    canvas.drawLine(mZeroPos[0], mZeroPos[1], mMaxXPos[0], mMaxXPos[1], mPaint);  }  private void drawContent(Canvas canvas) {    mGridLevel = mXLevel.size() - 1;    //计算出偏移title等显示尺标后的真实XY轴长度，便于接下来等分    mRealWidth = (mWidth - mXYTitleTextSize * 2);    mRealHight = (mHight - mXYTitleTextSize * 4);    //算出等分间距    int offsetX = mRealWidth/(mGridLevel);    int offsetY = mRealHight/(mGridLevel+1);    //循环绘制content    for (int index=0; index<mGridLevel+1; index++) {      mPaint.setColor(Color.DKGRAY);      mPaint.setTextAlign(Paint.Align.RIGHT);      mPaint.setTextSize(mXYTitleTextSize-5);      //绘制X轴的那些坐标区间点，包含0点坐标      canvas.drawText(String.valueOf(mXLevel.get(index)), mZeroPos[0]+(index*offsetX), mZeroPos[1] + mXYTitleTextSize, mPaint);      if (index != 0) {        //绘制Y轴坐标区间点，不包含0点坐标，X轴已经画过了        canvas.drawText(String.valueOf(mYLevel.get(index)), mZeroPos[0], mZeroPos[1]-(index*offsetY), mPaint);      }      if (index == mGridLevel) {        //坐标区间 = 真实区间 + 1        break;      }      mPaint.setColor(mGridColorLevel.get(mGridLevel - 1 - index));      mPaint.setStyle(Paint.Style.FILL);      //绘制区间叠加图谱方块，从远到0坐标，因为小的图会覆盖大的图      canvas.drawRect(mMaxYPos[0], mMaxYPos[1] + index*offsetY, mMaxXPos[0]-index*offsetX, mMaxXPos[1], mPaint);      mPaint.setColor(mGridTxtColorLevel.get(index));      mPaint.setTextAlign(Paint.Align.RIGHT);      mPaint.setTextSize(mXYTitleTextSize);      //绘制每个方块状态区间的提示文字      canvas.drawText(mGridLevelText.get(index), mMaxXPos[0] - index * offsetX - mXYTitleTextSize,          mMaxYPos[1] + index * offsetY + mXYTitleTextSize, mPaint);    }    //绘制当前坐标    drawNotice(canvas, offsetX, offsetY);  }  private void drawNotice(Canvas canvas, int offsetX, int offsetY) {    int realPosX = 0;    int realPosY = 0;    //计算传入的x值与真实屏幕坐标的像素值的百分比差值转换    for (int index=0; index<mGridLevel; index++) {      if (mMeasureXpos >= mXLevel.get(index) && mMeasureXpos < mXLevel.get(index+1)) {        int subValue = mMeasureXpos - mXLevel.get(index);        int offset = mXLevel.get(index+1) - mXLevel.get(index);        realPosX = mZeroPos[0] + index*offsetX + (subValue / offset);        break;      }    }    //计算传入的y值与真实屏幕坐标的像素值的百分比差值转换    for (int index=0; index<mGridLevel; index++) {      if (mMeasureYpos >= mYLevel.get(index) && mMeasureYpos < mYLevel.get(index+1)) {        int subValue = mMeasureYpos - mYLevel.get(index);        int offset = mYLevel.get(index+1) - mYLevel.get(index);        realPosY = mZeroPos[1] - index*offsetY - (offsetY - (subValue / offset));        break;      }    }    //画我们传入的坐标点的标记小红点    mPaint.setColor(Color.RED);    mPaint.setStyle(Paint.Style.FILL);    canvas.drawCircle(realPosX, realPosY, 8, mPaint);    int[] centerPos = {mZeroPos[0] + mRealWidth/2, mZeroPos[1] - mRealHight/2};    mPaint.setColor(Color.WHITE);    mPaint.setStyle(Paint.Style.FILL_AND_STROKE);    RectF rectF = null;    Path path = new Path();    //画红点旁边的提示框和文字，有四个区域，然后提示框的小三角指标方位不同    if (realPosX <= centerPos[0] && realPosY >= centerPos[1]) {      //left-bottom      //画三角形      path.moveTo(realPosX+5, realPosY+5);      path.lineTo(realPosX+15, realPosY+15);      path.lineTo(realPosX+15, realPosY-15);      //画矩形背景      rectF = new RectF(realPosX+15, realPosY-40, realPosX+200, realPosY + 30);      canvas.drawRoundRect(rectF, 15, 15, mPaint);      //画提示框的文字      mPaint.reset();      mPaint.setColor(Color.RED);      mPaint.setTextSize(mXYTitleTextSize - 5);      canvas.drawText("("+mMeasureXpos+", "+mMeasureYpos+")", realPosX+30, realPosY, mPaint);    }    else if (realPosX <= centerPos[0] && realPosY < centerPos[1]) {      //left-top      path.moveTo(realPosX+5, realPosY+5);      path.lineTo(realPosX+15, realPosY+15);      path.lineTo(realPosX + 15, realPosY - 15);      rectF = new RectF(realPosX+15, realPosY - 20, realPosX+200, realPosY + 50);      canvas.drawRoundRect(rectF, 15, 15, mPaint);      mPaint.reset();      mPaint.setColor(Color.RED);      mPaint.setTextSize(mXYTitleTextSize - 5);      canvas.drawText("("+mMeasureXpos+", "+mMeasureYpos+")", realPosX+30, realPosY+20, mPaint);    }    else if (realPosX > centerPos[0] && realPosY >= centerPos[1]) {      //right-bottom      path.moveTo(realPosX-5, realPosY+5);      path.lineTo(realPosX-15, realPosY+15);      path.lineTo(realPosX - 15, realPosY - 15);      rectF = new RectF(realPosX-200, realPosY-40, realPosX-15, realPosY + 30);      canvas.drawRoundRect(rectF, 15, 15, mPaint);      mPaint.reset();      mPaint.setColor(Color.RED);      mPaint.setTextSize(mXYTitleTextSize - 5);      canvas.drawText("("+mMeasureXpos+", "+mMeasureYpos+")", realPosX-180, realPosY, mPaint);    }    else if (realPosX > centerPos[0] && realPosY < centerPos[1]) {      //right-top      path.moveTo(realPosX-5, realPosY+5);      path.lineTo(realPosX-15, realPosY+15);      path.lineTo(realPosX - 15, realPosY - 15);      rectF = new RectF(realPosX-200, realPosY - 20, realPosX-15, realPosY + 50);      canvas.drawRoundRect(rectF, 15, 15, mPaint);      mPaint.reset();      mPaint.setColor(Color.RED);      mPaint.setTextSize(mXYTitleTextSize - 5);      canvas.drawText("("+mMeasureXpos+", "+mMeasureYpos+")", realPosX-180, realPosY+30, mPaint);    }    path.close();    mPaint.setColor(Color.WHITE);    mPaint.setStyle(Paint.Style.FILL_AND_STROKE);    canvas.drawPath(path, mPaint);  }  //设置当前比值  public void updateValues(int x, int y) {    mMeasureXpos = x;    mMeasureYpos = y;    postInvalidate();  }  //设置XY轴顶角的title字体大小  public void setTitleTextSize(int size) {    mXYTitleTextSize = size;  }  //初始化X轴的坐标区间点值，可以不均等分  public void initXLevelOffset(ArrayList<Integer> list) {    mXLevel.clear();    mXLevel.addAll(list);  }  //初始化Y轴的坐标区间点值，可以不均等分  public void initYLevelOffset(ArrayList<Integer> list) {    mYLevel.clear();    mYLevel.addAll(list);  }  //初始化每个区间的提示文字，如果不想显示可以设置""  public void initGridLevelText(ArrayList<String> list) {    mGridLevelText.clear();    mGridLevelText.addAll(list);  }  //初始化每个区间的颜色  public void initGridColorLevel(ArrayList<Integer> list) {    mGridColorLevel.clear();    mGridColorLevel.addAll(list);  }  //初始化每个区间的提示文字颜色  public void initGridTxtColorLevel(ArrayList<Integer> list) {    mGridTxtColorLevel.clear();    mGridTxtColorLevel.addAll(list);  }  //初始化XY轴title  public void initTitleXY(String x, String y) {    mTitleX = x;    mTitleY = y;  }}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  xmlns:tools="http://schemas.android.com/tools"   android:layout_width="match_parent"  android:layout_height="match_parent">  <com.yanbober.customerviewdemo.areachartsview.AreaChartsView    android:id="@+id/area_charts_view"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:layout_margin="10dp"/></RelativeLayout>

public class MainActivity extends AppCompatActivity {  private AreaChartsView mAreaChartsView;  private Timer timer;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    mAreaChartsView = (AreaChartsView) this.findViewById(R.id.area_charts_view);    //初始化自定义图表的规格和属性    ArrayList<Integer> mXLevel = new ArrayList<>();    ArrayList<Integer> mYLevel = new ArrayList<>();    ArrayList<String> mGridLevelText = new ArrayList<>();    ArrayList<Integer> mGridColorLevel = new ArrayList<>();    ArrayList<Integer> mGridTxtColorLevel = new ArrayList<>();    //初始化x轴坐标区间    mXLevel.add(0);    mXLevel.add(60);    mXLevel.add(90);    mXLevel.add(100);    mXLevel.add(110);    mXLevel.add(120);    //初始化y轴坐标区间    mYLevel.add(0);    mYLevel.add(90);    mYLevel.add(140);    mYLevel.add(160);    mYLevel.add(180);    mYLevel.add(200);    //初始化区间颜色    mGridColorLevel.add(Color.parseColor("#1FB0E7"));    mGridColorLevel.add(Color.parseColor("#4FC7F4"));    mGridColorLevel.add(Color.parseColor("#4FDDF2"));    mGridColorLevel.add(Color.parseColor("#90E9F4"));    mGridColorLevel.add(Color.parseColor("#B2F6F1"));    //初始化区间文字提示颜色    mGridTxtColorLevel.add(Color.parseColor("#EA8868"));    mGridTxtColorLevel.add(Color.parseColor("#EA8868"));    mGridTxtColorLevel.add(Color.parseColor("#EA8868"));    mGridTxtColorLevel.add(Color.WHITE);    mGridTxtColorLevel.add(Color.BLACK);    //初始化区间文字    mGridLevelText.add("异常");    mGridLevelText.add("过高");    mGridLevelText.add("偏高");    mGridLevelText.add("正常");    mGridLevelText.add("偏低");    mAreaChartsView.initGridColorLevel(mGridColorLevel);    mAreaChartsView.initGridLevelText(mGridLevelText);    mAreaChartsView.initGridTxtColorLevel(mGridTxtColorLevel);    mAreaChartsView.initXLevelOffset(mXLevel);    mAreaChartsView.initYLevelOffset(mYLevel);    mAreaChartsView.initTitleXY("投入量(H)", "产出量(H)");  }  @Override  protected void onStart() {    super.onStart();    timer = new Timer();    timer.schedule(new TimerTask() {      @Override      public void run() {        Random random = new Random();        int x = random.nextInt(120) % (120 + 1) + 0;        Random randomy = new Random();        int y = randomy.nextInt(200) % (200 + 1) + 0;        //随机模拟赋值        mAreaChartsView.updateValues(x, y);      }    }, 0, 1000);  }  @Override  protected void onPause() {    super.onPause();    timer.cancel();  }}