如何解决在API级别30Android 11上获取屏幕宽度:不建议使用getDefaultDisplay和getMetrics我们应该用什么代替呢? 您可以使用
我目前这样计算屏幕宽度:
public static int getScreenWidth(@NonNull Context context) {
DisplayMetrics displayMetrics = new DisplayMetrics();
((Activity) context).getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
return displayMetrics.widthPixels;
}
由于这两个函数( getDefaultDisplay()和 getMetrics())现在已被弃用,我们应该使用什么呢?
解决方法
要计算减去任何系统栏的屏幕宽度,这应该起作用:
<label for="">Headline</label>
<select name="google_fonts_headline" id="font-selection">
<option value="">Please Select</option>
</select>
<br/>
<br/>
<label for="">Font Style</label>
<select name="google_fonts_style" id="style-selection">
<option value="">Please Select</option>
</select>
<label for="">Subline</label>
<select name="google_fonts_subline" class="fonts" id="subline-selection">
<option valuue="">Please Select</option>
</select>
<div class="preview" style='border:1px solid red;'>
<h1>headline test</h1>
<p>subline here.</p>
</div>
<script>
$(document).ready(function(){
function getArray(){
return $.getJSON('https://www.googleapis.com/webfonts/v1/webfonts?key=AIzaSyD5e27MJ3ujq0cjs720_rElG5tAf3KbPb8');
}
getArray().done(function(fonts) {
var str = '';
var subset = '';
$.each(fonts,function(k,v) {
// font family
$.each(fonts.items,function(key,val) {
str+= '<option value='+ val.family +'>' + val.family + '</option>';
// // font style
$.each(val.variants,function(i,ctg){
subset+= '<option value='+ ctg +'>' + ctg + '</option>';
})
})
})
$('#font-selection').append(str);
$('#subline-selection').append(str);
$('#style-selection').append(subset);
});
// font selection
function fontSelection(){
$("select.fonts").change(function (e){
var id =$('#font-selection option' +':selected').val();
var id2 =$('#subline-selection option' +':selected').val();
$(".preview h1").css('font-family',id);
$(".preview p").css('font-family',id2);
var font = $('#font-selection').val(),font2 = $('#subline-selection').val(),name = this.options[this.selectedIndex].textContent;
if (font === 'default') {
$(this).css("font-family",'inherit');
} else {
$(this).css("font-family",name);
var link = replacestyle('https://fonts.googleapis.com/css?family=' + font + "|" + font2);
}
});
}
fontSelection();
// font style
function styleSelection(){
$("#font-selection").change(function(e){
$('#style-selection').css('border','1px solid red');
})
}
styleSelection();
})
// append to <head>
function replacestyle(url) {
if (!document.getElementById('style_fonts')) {
var style_tag = document.createElement('link');
style_tag.rel = 'stylesheet';
style_tag.id = 'style_fonts';
style_tag.type = 'text/css';
document.getElementsByTagName('head')[0].appendChild(style_tag);
replacestyle(url);
}
document.getElementById('style_fonts').href = url;
}
// append to <script>
var script = document.createElement('script');
script.src = 'https://www.googleapis.com/webfonts/v1/webfonts?key=AIzaSyD5e27MJ3ujq0cjs720_rElG5tAf3KbPb8';
document.body.appendChild(script);
</script>
请注意,这不完全相同:用高度测试此结果会产生不同的结果,而且我无法用新API复制旧API的功能(部分原因是旧API的行为有点难以解释,而并非总是您想要的,因此已弃用)。不过,实际上,作为通用屏幕宽度,它在很多方面都应该足够好。
,@RequiresApi(20)
inline val Fragment.windowHeight: Int
get() {
return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
val metrics = requireActivity().windowManager.currentWindowMetrics
val insets = metrics.windowInsets.getInsets(WindowInsets.Type.systemBars())
metrics.bounds.height() - insets.bottom - insets.top
} else {
val view = requireActivity().window.decorView
val insets = WindowInsetsCompat.toWindowInsetsCompat(view.rootWindowInsets,view).getInsets(WindowInsetsCompat.Type.systemBars())
resources.displayMetrics.heightPixels - insets.bottom - insets.top
}
}
@RequiresApi(20)
inline val Fragment.windowWidth: Int
get() {
return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
val metrics = requireActivity().windowManager.currentWindowMetrics
val insets = metrics.windowInsets.getInsets(WindowInsets.Type.systemBars())
metrics.bounds.width() - insets.left - insets.right
} else {
val view = requireActivity().window.decorView
val insets = WindowInsetsCompat.toWindowInsetsCompat(view.rootWindowInsets,view).getInsets(WindowInsetsCompat.Type.systemBars())
resources.displayMetrics.widthPixels - insets.left - insets.right
}
}
这需要 androidx.core
版本 1.5.x
您可以使用
Context.getDisplay()
而不是getDefaultDisplay()
display.getRealMatrix(displayMetrics)
而不是display.getMetrics(displayMetrics)
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