我有一个显示比例尺的Android应用程序,它在所有版本上运行良好,直到5.0(Lollipop),其中使用drawText方法绘制的所有文本都以某种方式被截断。
仅显示两个字母文本的第二个字母
即第一个标记仅为'0'字母,但不显示
对于第二个2标记(40和80),仅显示0,其余为140 ... 250,不显示任何文本。
文本大小似乎没问题,但并不是所有的字符都显示出来。
图像在[0..1,0..1]方格中缩放
我在drawText上找到并尝试了很多帖子,但没有一个帮助
(View.setLayerType()所有组合,setLinearText(true),Paint.Style.FILL ...)
private void drawScale(final Canvas canvas) {
canvas.save(Canvas.MATRIX_SAVE_FLAG);
// On canvas, North is 0 degrees, East is 90 degrees, South is 180 etc.
// We start the scale somewhere South-West so we need to first rotate the canvas.
canvas.rotate(mScaleRotation, 0.5f, 0.5f);
final int totalTicks = mDivisions * mSubdivisions + 1;
for (int i = 0; i < totalTicks; i++) {
final float y1 = mScaleRect.top;
final float y2 = y1 + 0.015f; // height of division
final float y3 = y1 + 0.045f; // height of subdivision
final float value = getValueForTick(i);
final Paint paint = getRangePaint(value);
if (0 == value % mDivisions) {
// Draw a division tick
canvas.drawLine(0.5f, y1, 0.5f, y3, paint);
// Draw the text 0.15 away from the division tick
canvas.drawText(valueString(value), 0.5f, y3 + 0.045f, paint);
}
else {
// Draw a subdivision tick
canvas.drawLine(0.5f, y1, 0.5f, y2, paint);
}
canvas.rotate(mSubdivisionAngle, 0.5f, 0.5f);
}
canvas.restore();
}
其中范围绘制就像这样创建
mRangePaints[i] = new Paint(Paint.LINEAR_TEXT_FLAG | Paint.ANTI_ALIAS_FLAG);
mRangePaints[i].setColor(mRangeColors[i]);
mRangePaints[i].setStyle(Paint.Style.STROKE);
mRangePaints[i].setStrokeWidth(0.005f);
mRangePaints[i].setTextSize(0.05f);
mRangePaints[i].setTypeface(Typeface.SANS_SERIF);
mRangePaints[i].setTextAlign(Align.CENTER);
mRangePaints[i].setShadowLayer(0.005f, 0.002f, 0.002f, mTextShadowColor);
和canvas就像这样创建
mBackground = Bitmap.createBitmap(getWidth(), getHeight(), Bitmap.Config.ARGB_8888);
final Canvas canvas = new Canvas(mBackground);
这是来自and android 5.0的捕获
这是从android 4.4
中捕获的任何帮助,线索等......都将深表感谢。
修改 感谢您的建议,
我编写了一个函数,可以重新缩放textSize 10f的所有大小。 每次对canvas.drawText的原始调用都被替换为对此
的调用drawScaledText(canvas,...原始值......)
一切似乎都很好。
以下是代码段:
public static void drawScaledText(Canvas canvas, String text, float x, float y, Paint paint, float scale) {
float originalStrokeWidth = paint.getStrokeWidth();
float originalTextSize = paint.getTextSize();
float textScaling = 10f/originalTextSize;
paint.setStrokeWidth(originalStrokeWidth * textScaling);
paint.setTextSize(originalTextSize * textScaling);
canvas.save();
canvas.scale(scale/textScaling, scale/textScaling);
canvas.drawText(text, x * textScaling, y * textScaling, paint);
canvas.restore();
paint.setStrokeWidth(originalStrokeWidth);
paint.setTextSize(originalTextSize);
}
答案 0 :(得分:2)
canvas.DrawText()
和canvas.DrawTextOnPath()
在1
增加字体大小。您可以缩放画布以进行补偿。