Java 如何创建构造函数以便传递值
如何将浮点值从主活动传递给其他活动,或者如何为给定java类的画布绘制位图构造函数创建构造函数。我想将该值传递或设置为for ex:X=40,Y=30,并在DrawOnCanvas的覆盖方法中分配它 drawBitmap(位图,X,Y,null); 我有一个来自github的实现,需要在这个类中实现这些值:Java 如何创建构造函数以便传递值,java,android,android-canvas,Java,Android,Android Canvas,如何将浮点值从主活动传递给其他活动,或者如何为给定java类的画布绘制位图构造函数创建构造函数。我想将该值传递或设置为for ex:X=40,Y=30,并在DrawOnCanvas的覆盖方法中分配它 drawBitmap(位图,X,Y,null); 我有一个来自github的实现,需要在这个类中实现这些值: public class WatermarkFilter extends GlOverlayFilter { private Bitmap bitmap; private Position
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
}
}
从我使用此方法的MainClass方法:
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))
根据您的问题,我假设您希望在画布方法中设置X和Y浮点值 创建一个像
public WatermarkFilter(Bitmap bitmap, Float x, Float y) {
this.bitmap = bitmap;
X = x;
Y = y;
}
并在覆盖方法中设置:
@Override
protected void drawCanvas(Canvas canvas) {
if (bitmap != null && !bitmap.isRecycled()) {
canvas.drawBitmap(bitmap,X,Y,null);
在您的主要活动中:
filter(new WatermarkFilter(BitmapFactory.decodeResource(mContext.getResources(),R.drawable.ic_launcher_sample),X,Y))