public void onDraw(Canvas canvas) {
// 검정색 배경으로 지운다. 빈 화면이면 지우기만 하고 리턴
canvas.drawColor(Color.BLACK);
if (status == BLANK) {
return;
}
// 도형 목록을 순회하면서 도형 정보대로 출력한다.
int idx;
for (idx = 0; idx < arShape.size(); idx++) {
Paint Pnt = new Paint();
Pnt.setAntiAlias(true);
Pnt.setColor(arShape.get(idx).color);
Rect rt = arShape.get(idx).rt;
switch (arShape.get(idx).what) {
case Shape.RECT:
canvas.drawRect(rt, Pnt);
break;
case Shape.CIRCLE:
canvas.drawCircle(
rt.left + rt.width() / 2, rt.top + rt.height() / 2, rt.width() / 2, Pnt);
break;
case Shape.TRIANGLE:
Path path = new Path();
path.moveTo(rt.left + rt.width() / 2, rt.top);
path.lineTo(rt.left, rt.bottom);
path.lineTo(rt.right, rt.bottom);
canvas.drawPath(path, Pnt);
break;
}
}
}
void myDraw() {
float width, height;
width = getMeasuredWidth();
height = getMeasuredHeight();
canvas = holder.lockCanvas();
canvas.drawColor(Color.GREEN);
canvas.drawPath(path, paint);
holder.unlockCanvasAndPost(canvas);
}
public void onDraw(Canvas canvas) {
canvas.drawColor(Color.LTGRAY);
Paint Pnt = new Paint();
String str = "Custom Font Test";
Pnt.setAntiAlias(true);
Pnt.setTypeface(mFont);
Pnt.setTextSize(30);
canvas.drawText(str, 10, 40, Pnt);
}
public void mDraw() {
mCanvas = mHolder.lockCanvas(); // 获得画布对象,开始对画布画画
mCanvas.drawColor(++i); // 设置画布颜色为黑色
canvasMethod(mCanvas); // 调用自定义的方法,主要是在传进去的画布对象上画画
mHolder.unlockCanvasAndPost(mCanvas); // 把画布显示在屏幕上
}
@Override
protected void dispatchDraw(Canvas canvas) {
if (showcaseX < 0 || showcaseY < 0 || isRedundant) {
super.dispatchDraw(canvas);
return;
}
// Draw the semi-transparent background
canvas.drawColor(backColor);
// Draw to the scale specified
Matrix mm = new Matrix();
mm.postScale(scaleMultiplier, scaleMultiplier, showcaseX, showcaseY);
canvas.setMatrix(mm);
// Erase the area for the ring
canvas.drawCircle(showcaseX, showcaseY, showcaseRadius, mEraser);
boolean recalculateText = makeVoidedRect() || mAlteredText;
mAlteredText = false;
showcase.setBounds(voidedArea);
showcase.draw(canvas);
canvas.setMatrix(new Matrix());
if (!TextUtils.isEmpty(mTitleText) || !TextUtils.isEmpty(mSubText)) {
if (recalculateText)
mBestTextPosition = getBestTextPosition(canvas.getWidth(), canvas.getHeight());
if (!TextUtils.isEmpty(mTitleText)) {
// TODO: use a dynamic detail layout
canvas.drawText(mTitleText, mBestTextPosition[0], mBestTextPosition[1], mPaintTitle);
}
if (!TextUtils.isEmpty(mSubText)) {
canvas.save();
if (recalculateText)
mDynamicDetailLayout =
new DynamicLayout(
mSubText,
mPaintDetail,
((Number) mBestTextPosition[2]).intValue(),
Layout.Alignment.ALIGN_NORMAL,
1.2f,
1.0f,
true);
canvas.translate(mBestTextPosition[0], mBestTextPosition[1] + 12 * metricScale);
mDynamicDetailLayout.draw(canvas);
canvas.restore();
}
}
super.dispatchDraw(canvas);
}
public void onDraw(Canvas canvas) {
canvas.drawColor(Color.LTGRAY);
Paint Pnt = new Paint();
int y = 1;
Pnt.setAntiAlias(true);
Pnt.setTextSize(30);
Pnt.setTypeface(Typeface.create(Typeface.DEFAULT, Typeface.NORMAL));
canvas.drawText("Font:Default", 10, y++ * 40, Pnt);
Pnt.setTypeface(Typeface.create(Typeface.DEFAULT_BOLD, Typeface.NORMAL));
canvas.drawText("Font:Default Bold", 10, y++ * 40, Pnt);
Pnt.setTypeface(Typeface.create(Typeface.MONOSPACE, Typeface.NORMAL));
canvas.drawText("Font:Monospace", 10, y++ * 40, Pnt);
Pnt.setTypeface(Typeface.create(Typeface.SANS_SERIF, Typeface.NORMAL));
canvas.drawText("Font:Sans Serif", 10, y++ * 40, Pnt);
Pnt.setTypeface(Typeface.create(Typeface.SERIF, Typeface.NORMAL));
canvas.drawText("Font:Serif", 10, y++ * 40, Pnt);
}
/**
* 画整体chart图
*
* @param translatX chart图偏移量
*/
public void refreshChart(int translatX) {
synchronized (holder) {
translationChart(translatX);
if (holder != null) {
Canvas canvas = holder.lockCanvas();
if (canvas != null) {
canvas.drawColor(backColor);
drawGridLine(canvas);
drawChartLine(canvas);
drawLimitRect(canvas);
drawAxesLine(canvas);
drawYValueText(canvas);
holder.unlockCanvasAndPost(canvas);
}
}
}
}