Java android中的自定义视图在每个设备中看起来都不一样
我正在android中开发自定义视图。我想在视图中显示路径。所有的要点都是这样硬编码的Java android中的自定义视图在每个设备中看起来都不一样,java,android,android-custom-view,Java,Android,Android Custom View,我正在android中开发自定义视图。我想在视图中显示路径。所有的要点都是这样硬编码的 private void loadData(){ float density = getResources().getDisplayMetrics().density; testPath = new Path(); testPath.moveTo(new Point((int) (242*density), (
private void loadData(){
float density = getResources().getDisplayMetrics().density;
testPath = new Path();
testPath.moveTo(new Point((int) (242*density), (int) (213*density)));
testPath.lineTo(new Point((int) (214*density), (int) (209*density)));
testPath.lineTo(new Point((int) (131*density), (int) (243*density)));
testPath.lineTo(new Point((int) (96*density), (int) (314*density)));
testPath.lineTo(new Point((int) (117*density), (int) (403*density)));
testPath.lineTo(new Point((int) (194*density), (int) (457*density)));
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);{
canvas.drawLine(0,200,canvas.getWidth(),200,drawPaint);
canvas.drawLine(0,canvas.getHeight()/2,canvas.getWidth(),canvas.getHeight()/2,drawPaint);
canvas.drawLine(canvas.getWidth()/2,0,canvas.getWidth()/2,canvas.getHeight(),drawPaint);
canvas.drawPath(testPath, drawPaint);
}
但在xxhdpi中,屏幕位于基线(中间线)下方。而在mpdpi中,它位于基线之上。若我不将点与丹尼斯像素相乘,那个么在XXHDP设备中路径太小。
这是mdpi设备映像。
下面是xxhdpi设备的问题陈述:如果假设在1280x720(16:9)设备上有一个点,比如说p(10,20),那么在480x854设备(或者任何分辨率为16:9的设备)上对应的点应该是什么 解决方案:
public int getGeneralizedValueX(int x) {
return (int) (AppConstants.CANVAS_WIDTH * (x / 1280f));
}
public int getGeneralizedValueY(int y) {
return (int) (AppConstants.CANVAS_HEIGHT * (y / 720f));
}
注:上述公式适用于画布宽度和画布高度的恒定比率您的onDraw没有考虑屏幕的密度,因此如何使每种设备的屏幕相等?我尝试用密度像素乘以点,但效果不太好