如何将float值从Main Activity传递给其他对象，或者如何为给定的java类在位图构造函数上为canvas绘制创建构造函数。我想将此值传递或设置为例如：X = 40，Y = 30并在DrawOnCanvas canvas.drawBitmap（bitmap，X，Y，null）的重写方法中分配它；我有一个来自github的实现，需要在此类中实现这些值：
public class WatermarkFilter extends GlOverlayFilter {
private Bitmap bitmap;
private Position position = Position.LEFT_TOP;
private Canvas canvas;
public WatermarkFilter(Bitmap bitmap) {
this.bitmap = bitmap;
}
public WatermarkFilter(Bitmap bitmap, Position position) {
this.bitmap = bitmap;
this.position = position;
}
@Override
protected void drawCanvas(Canvas canvas) {
if (bitmap != null && !bitmap.isRecycled()) {
switch (position) {
case LEFT_TOP:
canvas.drawBitmap(bitmap, "X", "Y", null);
break;
case RIGHT_BOTTOM:
canvas.drawBitmap(bitmap, canvas.getWidth() - bitmap.getWidth(), canvas.getHeight() - bitmap.getHeight(), null);
break;
}
}
}
public enum Position {
LEFT_TOP,
LEFT_BOTTOM,
RIGHT_TOP,
RIGHT_BOTTOM
}
}
从我正在使用此方法的MainClass方法中：
float X = sticker.getMappedBoundPoints()[0];
float Y = sticker.getMappedBoundPoints()[1];
Log.d(TAG, "SavedVideo: " + "X" + X + "?/" + "Y" + Y);
mp4Composer = new Mp4Composer(inputVideoPath, videoPath)
.rotation(Rotation.ROTATION_270)
.size(720, 720)
.filter(new WatermarkFilter(BitmapFactory.decodeResource(mContext.getResources(),R.drawable.ic_launcher_sample),WatermarkFilter.Position.LEFT_TOP))
从您的问题中，我假设您想在Canvas方法上设置X和Y浮点值，所以很简单地创建一个像
public WatermarkFilter(Bitmap bitmap, Float x, Float y) {
this.bitmap = bitmap;
X = x;
Y = y;
}
并设置Override方法：
@Override
protected void drawCanvas(Canvas canvas) {
if (bitmap != null && !bitmap.isRecycled()) {
canvas.drawBitmap(bitmap,X,Y,null);
在您的MainActivity中：
filter(new WatermarkFilter(BitmapFactory.decodeResource(mContext.getResources(),R.drawable.ic_launcher_sample),X,Y))
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