以多种屏幕分辨率、密度填充整个屏幕
我想在所有 Android 手机上绘制一个填充整个屏幕的矩形，所有分辨率，所有屏幕密度。一切......:) 首先，根据我的理解，Canvas.drawRect 用作像素尺寸值。希望这是正确的。 作为 Android 新手，我认为如果我简单地这样写就足够了，因为目前没有分辨率高于 1024x1024 像素的 Android 设备：
ScreenWidth = 1024;
ScreenHeight = 1024;
canvas.drawRect(0,0, ScreenWidth, ScreenHeight, mLoadPaint);
但似乎在某些设备上这个 Rectangle 并没有填充整个屏幕。奇怪的是，我无法解释自己的是，这种情况并不总是发生，而是在某个时间点发生...... 无论如何，代码似乎有问题，所以我想将其更改为如下所示，但现在可以肯定，metrics.widthPixels和metrics.heightPixels将解决我的问题：
wm = (WindowManager) getSystemService(WINDOW_SERVICE);
DisplayMetrics metrics = new DisplayMetrics();
wm.getDefaultDisplay().getMetrics(metrics);
canvas.drawRect(0,0, metrics.widthPixels, metrics.heightPixels, mLoadPaint);
我想知道这是否正确，并且如果这段代码将覆盖所有屏幕，则矩形将填满整个屏幕。 当然，使用这种方法时，我还必须注意屏幕方向，因为当屏幕处于横向时，它们之间的值似乎会交换。
I want to draw a rectangle that fills the entire screen on all Android phones, all resolution, all screen densities.Everything... :)
First from what I understand Canvas.drawRect use as dimensions values in pixel. Hope this is correct.
Being new to Android I thought that if I simply write like this it will be sufficient, since at this moment there is no Android device with a resolution higher than 1024x1024 pixels:
ScreenWidth = 1024;
ScreenHeight = 1024;
canvas.drawRect(0,0, ScreenWidth, ScreenHeight, mLoadPaint);
But it seems that on some devices this Rectangle doesn't fill the entire screen. What is strange and I can't explain myself is that this doesn't happens always but at a point in time...
Anyway it seems that there is a problem with the code so I would like to change it to look something like this, but now sure it metrics.widthPixels and metrics.heightPixels will solve my problem:
wm = (WindowManager) getSystemService(WINDOW_SERVICE);
DisplayMetrics metrics = new DisplayMetrics();
wm.getDefaultDisplay().getMetrics(metrics);
canvas.drawRect(0,0, metrics.widthPixels, metrics.heightPixels, mLoadPaint);
I want to know if this is correct, and if this piece of code will cover all screens, and the rectangle will fill the entire screen.
Of course with this approach I will have to take care also of the screen orientation, as it seems that the values are swapped between them when the screen is in Landscape.
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你可以尝试canvas.drawColor(int color)
You can try canvas.drawColor(int color)