java 如何获取对话框大小？
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How to get dialog size?
提问by slezadav
I am looking for a way to get size of a custom dialog. I went through thisquestion, but the only answer given is pretty useless, because if I try mDialog.getWindow().getAttributes().height;it only returns -2, which is a constant for WRAP_CONTENTattribute which I set to dialog. How can I get the size of it. I want to know the siye for the background image.
我正在寻找一种获取自定义对话框大小的方法。我经历了这个问题，但给出的唯一答案是非常无用的，因为如果我尝试mDialog.getWindow().getAttributes().height;它只返回 -2，这是WRAP_CONTENT我设置为对话框的属性的常量。我怎样才能得到它的大小。我想知道背景图像的四叶。
回答by Korniltsev Anatoly
Give it a try:
试一试：
mDialog.getWindow().getDecorView().getHeight()
回答by Michal
Actually, in Android it doesn't work like in iOS - you can't get the size of the Viewitself, what you can do, though, is to ask for the size of the ROOTlayout of that view.
实际上，在 Android 中它不像在 iOS 中那样工作 - 您无法获得View自身的大小，但是您可以做的是询问该视图的ROOT布局的大小。
e.g.:
例如：
myDialog.this.findViewById(R.id.dialog_root_layout).getHeight());
myDialog.this.findViewById(R.id.dialog_root_layout).getHeight());
回答by CodeToLife
@Kormilsev Anatoliy has answered correct and I am just improving. So in the class you inherit from Dialog class just override the method:
@Kormilsev Anatoliy 回答正确，我只是在改进。因此，在您从 Dialog 类继承的类中，只需覆盖该方法：
@Override
public void onWindowFocusChanged (boolean hasFocus) {
super.onWindowFocusChanged(hasFocus);
height = getWindow().getDecorView().getHeight();
}
回答by Alexey Ishkov
In case, if you have your own XML layouts for custom dialog.
以防万一，如果您有自己的自定义对话框的 XML 布局。
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/dialog_main_layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:background="@color/primaryBackground">
/* whatever you want here */
</android.support.constraint.ConstraintLayout>
In activity:
在活动中：
final Dialog dialog = new Dialog(this);
dialog.setContentView(R.layout.popup_gameover);
dialog.setOnShowListener(new DialogInterface.OnShowListener() {
@Override
public void onShow(DialogInterface d) {
View view = dialog.findViewById(R.id.dialog_main_layout);
int width = view.getWidth();
int height = view.getHeight();
...
}
});
This widthand heightexacly as expected.
这width和height预期的一样。
