Android自定义view七时间轴（一）

Android线性图表的横纵向时间轴的父类

public class CharterLabelsBase extends View {
public static final int VERTICAL_GRAVITY_TOP = 0;
public static final int VERTICAL_GRAVITY_CENTER = 1;
public static final int VERTICAL_GRAVITY_BOTTOM = 2;
public static final int HORIZONTAL_GRAVITY_LEFT = 0;
public static final int HORIZONTAL_GRAVITY_CENTER = 1;
public static final int HORIZONTAL_GRAVITY_RIGHT = 2;
private static final int DEFAULT_VERTICAL_GRAVITY = VERTICAL_GRAVITY_CENTER;
private static final int DEFAULT_HORIZONTAL_GRAVITY = HORIZONTAL_GRAVITY_LEFT;
private static final boolean DEFAULT_STICKY_EDGES = false;

Paint paintLabel;
boolean[] visibilityPattern;
int verticalGravity;
int horizontalGravity;
String[] values;
boolean stickyEdges;
protected int paintLabelColor;
protected float paintLabelSize;

protected CharterLabelsBase(Context context) {
    this(context, null);
}

protected CharterLabelsBase(Context context, AttributeSet attrs) {
    this(context, attrs, 0);
}

protected CharterLabelsBase(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    init(context, attrs);
}

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
protected CharterLabelsBase(Context context, AttributeSet attrs, int defStyleAttr,
                            int defStyleRes) {
    super(context, attrs, defStyleAttr, defStyleRes);
    init(context, attrs);
}

private void init(Context context, AttributeSet attrs) {
    if (isInEditMode()) {
        return;
    }

    final TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.Charter);
    stickyEdges = typedArray.getBoolean(R.styleable.Charter_c_stickyEdges, DEFAULT_STICKY_EDGES);
    verticalGravity =
            typedArray.getInt(R.styleable.Charter_c_verticalGravity, DEFAULT_VERTICAL_GRAVITY);
    horizontalGravity =
            typedArray.getInt(R.styleable.Charter_c_horizontalGravity, DEFAULT_HORIZONTAL_GRAVITY);
    paintLabelColor = typedArray.getColor(R.styleable.Charter_c_labelColor,
            getResources().getColor(R.color.default_labelColor));
    paintLabelSize = typedArray.getDimension(R.styleable.Charter_c_labelSize,
            getResources().getDimension(R.dimen.default_labelSize));
    typedArray.recycle();

    paintLabel = new Paint();
    paintLabel.setAntiAlias(true);
    paintLabel.setColor(paintLabelColor);
    paintLabel.setTextSize(paintLabelSize);

    visibilityPattern = new boolean[]{true};
}

public boolean isStickyEdges() {
    return stickyEdges;
}

public void setStickyEdges(boolean stickyEdges) {
    this.stickyEdges = stickyEdges;
    invalidate();
}

public Paint getPaintLabel() {
    return paintLabel;
}

public void setPaintLabel(Paint paintLabel) {
    this.paintLabel = paintLabel;
    invalidate();
}

public boolean[] getVisibilityPattern() {
    return visibilityPattern;
}

public void setVisibilityPattern(boolean[] visibilityPattern) {
    this.visibilityPattern = visibilityPattern;
    invalidate();
}

public int getVerticalGravity() {
    return verticalGravity;
}

public void setVerticalGravity(@VerticalGravity int verticalGravity) {
    this.verticalGravity = verticalGravity;
    invalidate();
}

public int getHorizontalGravity() {
    return horizontalGravity;
}

public void setHorizontalGravity(@HorizontalGravity int horizontalGravity) {
    this.horizontalGravity = horizontalGravity;
    invalidate();
}

public int getLabelColor() {
    return paintLabelColor;
}

public void setLabelColor(@ColorInt int labelColor) {
    paintLabel.setColor(labelColor);
    paintLabelColor = labelColor;
    invalidate();
}

public float getLabelSize() {
    return paintLabelSize;
}

public void setLabelSize(float labelSize) {
    paintLabel.setTextSize(labelSize);
    paintLabelSize = labelSize;
    invalidate();
}

public void setLabelTypeface(Typeface typeface) {
    paintLabel.setTypeface(typeface);
    invalidate();
}

public String[] getValues() {
    return values;
}

public void setValues(float[] values) {
    setValues(floatArrayToStringArray(values));
}

public void setValues(String[] values) {
    if (values == null || values.length == 0) {
        return;
    }

    this.values = values;
    invalidate();
}

public void setValues(float[] values, boolean summarize) {
    if (summarize) {
        values = summarize(values);
    }
    setValues(floatArrayToStringArray(values));
}

private String[] floatArrayToStringArray(float[] values) {
    if (values == null) {
        return new String[]{};
    }

    String[] stringArray = new String[values.length];
    for (int i = 0; i < stringArray.length; i++) {
        stringArray[i] = String.valueOf((int) values[i]);
    }
    return stringArray;
}

private float[] summarize(float[] values) {
    if (values == null) {
        return new float[]{};
    }

    float max = values[0];
    float min = values[0];
    for (float value : values) {
        if (value > max) {
            max = value;
        }
        if (value < min) {
            min = value;
        }
    }
    float diff = max - min;

    return new float[]{min, diff / 5, diff / 2, (diff / 5) * 4, max};
}

@Retention(RetentionPolicy.SOURCE)
@IntDef({VERTICAL_GRAVITY_TOP, VERTICAL_GRAVITY_CENTER, VERTICAL_GRAVITY_BOTTOM})
public @interface VerticalGravity {
}

@Retention(RetentionPolicy.SOURCE)
@IntDef({HORIZONTAL_GRAVITY_LEFT, HORIZONTAL_GRAVITY_CENTER, HORIZONTAL_GRAVITY_RIGHT})
public @interface HorizontalGravity {
}