Android 如何获得真实的屏幕高度和宽度?
我使用这些代码来获得屏幕的高度和宽度 我的Nexus7上的屏幕高度应为1280 但它返回1205 我的版本是8级 所以我不能用这些方法:Android 如何获得真实的屏幕高度和宽度?,android,Android,我使用这些代码来获得屏幕的高度和宽度 我的Nexus7上的屏幕高度应为1280 但它返回1205 我的版本是8级 所以我不能用这些方法: DisplayMetrics metrics = new DisplayMetrics(); this.getWindowManager().getDefaultDisplay().getMetrics(metrics); screenWidth = metrics.widthPixels; screenHeight = metrics.heightPixel
DisplayMetrics metrics = new DisplayMetrics();
this.getWindowManager().getDefaultDisplay().getMetrics(metrics);
screenWidth = metrics.widthPixels;
screenHeight = metrics.heightPixels;
现在,我应该如何获得正确的屏幕大小
编辑:
使用它工作 我想这会管用的。诀窍是你必须使用:
if (Build.VERSION.SDK_INT >= 11) {
Point size = new Point();
try {
this.getWindowManager().getDefaultDisplay().getRealSize(size);
screenWidth = size.x;
screenHeight = size.y;
} catch (NoSuchMethodError e) {
Log.i("error", "it can't work");
}
} else {
DisplayMetrics metrics = new DisplayMetrics();
this.getWindowManager().getDefaultDisplay().getMetrics(metrics);
screenWidth = metrics.widthPixels;
screenHeight = metrics.heightPixels;
}
不是
要解决API 8编码问题,请执行以下操作:
display.getSize(size);
只有较新的API设备才会有屏幕上的导航按钮,因此需要新方法,较旧的设备会抛出异常,但不会有屏幕上的导航,因此较旧的方法很好
如果需要说明的话:仅仅因为您的项目有一个minimumAPI级别8,并不意味着您必须在该级别编译它。我也至少使用了8级,但我的项目大多是在13级(3.2)进行编译的,这使他们能够使用许多新方法。我编写了一个方法,该方法将尽可能接近API 10到17+。它应该为API14+提供真实的宽度和高度,并且它对其他所有内容都能提供
try {
display.getRealSize(size);
height = size.y;
} catch (NoSuchMethodError e) {
height = display.getHeight();
}
您可以使用
Display
或DisplayMetrics
使用显示:
Display display = context.getWindowManager().getDefaultDisplay();
int realWidth;
int realHeight;
if (Build.VERSION.SDK_INT >= 17){
//new pleasant way to get real metrics
DisplayMetrics realMetrics = new DisplayMetrics();
display.getRealMetrics(realMetrics);
realWidth = realMetrics.widthPixels;
realHeight = realMetrics.heightPixels;
} else if (Build.VERSION.SDK_INT >= 14) {
//reflection for this weird in-between time
try {
Method mGetRawH = Display.class.getMethod("getRawHeight");
Method mGetRawW = Display.class.getMethod("getRawWidth");
realWidth = (Integer) mGetRawW.invoke(display);
realHeight = (Integer) mGetRawH.invoke(display);
} catch (Exception e) {
//this may not be 100% accurate, but it's all we've got
realWidth = display.getWidth();
realHeight = display.getHeight();
Log.e("Display Info", "Couldn't use reflection to get the real display metrics.");
}
} else {
//This should be close, as lower API devices should not have window navigation bars
realWidth = display.getWidth();
realHeight = display.getHeight();
}
private void findRealSize(Activity activity)
{
Point size = new Point();
Display display = activity.getWindowManager().getDefaultDisplay();
if (Build.VERSION.SDK_INT >= 17)
display.getRealSize(size);
else
display.getSize(size);
int realWidth = size.x;
int realHeight = size.y;
Log.i("LOG_TAG", "realWidth: " + realWidth + " realHeight: " + realHeight);
}
使用DisplayMetrics:
Display display = context.getWindowManager().getDefaultDisplay();
int realWidth;
int realHeight;
if (Build.VERSION.SDK_INT >= 17){
//new pleasant way to get real metrics
DisplayMetrics realMetrics = new DisplayMetrics();
display.getRealMetrics(realMetrics);
realWidth = realMetrics.widthPixels;
realHeight = realMetrics.heightPixels;
} else if (Build.VERSION.SDK_INT >= 14) {
//reflection for this weird in-between time
try {
Method mGetRawH = Display.class.getMethod("getRawHeight");
Method mGetRawW = Display.class.getMethod("getRawWidth");
realWidth = (Integer) mGetRawW.invoke(display);
realHeight = (Integer) mGetRawH.invoke(display);
} catch (Exception e) {
//this may not be 100% accurate, but it's all we've got
realWidth = display.getWidth();
realHeight = display.getHeight();
Log.e("Display Info", "Couldn't use reflection to get the real display metrics.");
}
} else {
//This should be close, as lower API devices should not have window navigation bars
realWidth = display.getWidth();
realHeight = display.getHeight();
}
private void findRealSize(Activity activity)
{
Point size = new Point();
Display display = activity.getWindowManager().getDefaultDisplay();
if (Build.VERSION.SDK_INT >= 17)
display.getRealSize(size);
else
display.getSize(size);
int realWidth = size.x;
int realHeight = size.y;
Log.i("LOG_TAG", "realWidth: " + realWidth + " realHeight: " + realHeight);
}
这有用吗?不,我不能使用
display.getSize(size)代码>由于my min SDK为8级,如果您阅读trojanfoe链接中的一些注释,它们会建议如下内容:尝试{display.getSize(size);width=size.x;height=size.y;}catch(NoSuchMethodError e){width=display.getWidth();height=display.getHeight();}。。。。但是,即使您可以使用getSize()方法,我认为您仍然可以获得1205分辨率,即可用的屏幕高度(即减去导航按钮)。不确定如何获得导航按钮的高度,但感兴趣且外观美观。在编辑中,您检查API级别>=11。Display#getRealSize()是在API级别17中添加的,因此您应该检查该级别。您可以检查设备上的api级别,而不是使用try-catch块。请参阅Build.VERSION和methods Display.getHeight、Display.getSize、Display.getRealSize请记住,此方法不适用于API级别14、15和16,因为getRealSize()
方法仅在API级别17中引入。这里有一个找到原始值的变通方法private void findRealSize(Activity activity)
{
DisplayMetrics displayMetrics = new DisplayMetrics();
if (Build.VERSION.SDK_INT >= 17)
{
activity.getWindowManager().getDefaultDisplay().getRealMetrics(displayMetrics);
}
else
{
activity.getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
}
int realWidth = displayMetrics.widthPixels;
int realHeight = displayMetrics.heightPixels;
Log.i("LOG_TAG", "realWidth: " + realWidth + " realHeight: " + realHeight);
}