package com.lcjian.library.util;
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import android.app.Dialog;
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import android.content.Context;
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import androidx.fragment.app.Fragment;
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import android.view.Gravity;
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import android.view.View;
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import android.view.Window;
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import android.view.WindowManager;
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public class DialogUtils {
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private static final String TAG = DialogUtils.class.getName();
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/**
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* @param dialog
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* @param fragment
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* @param hasStatusBar 该页面是否具有statusBar。有，在不包括状态栏的区域居中；没有，在该整个区域居中。
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*/
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public static void setDialogInFragmentsCenter(Dialog dialog, Fragment fragment, final boolean hasStatusBar) {
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// 1、获取Dialog所述的Window，以及LayoutParams(布局参数)
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final Window dialogWindow = dialog.getWindow();
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dialogWindow.setFlags(WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE, WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE);
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final WindowManager.LayoutParams lp = dialogWindow.getAttributes();
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// 2、获取到Fragment所处的View
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final View fragmentView = fragment.getView();
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// 3、获取到Dialog的DecorView
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final View dialogView = dialogWindow.getDecorView();
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dialogView.setVisibility(View.INVISIBLE);
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dialogView.post(new Runnable() {
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@Override
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public void run() {
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// 4、获取到Fragment左上角点的距离整个屏幕的距离
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int[] location = new int[2];
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fragmentView.getLocationOnScreen(location);
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int fragmentWidth = fragmentView.getMeasuredWidth();
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int fragmentHeight = fragmentView.getMeasuredHeight();
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// 5、获取到Dialog的宽高
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int dialogWith = dialogView.getMeasuredWidth();
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int dialogHeight = dialogView.getMeasuredHeight();
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// 6、获取到标题栏的宽高
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int mStatusBarHeight = 0;
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if (hasStatusBar) {
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// 有状态栏，需要去除状态栏的影响。
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mStatusBarHeight = getStatusBarHeight(fragmentView.getContext());
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}
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// 7、Dialog从左上角开始排
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dialogWindow.setGravity(Gravity.START | Gravity.TOP);
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// x = fragment的x + fragment宽度/2 - Dialog宽度/2
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lp.x = location[0] + fragmentWidth / 2 - dialogWith / 2;
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// y = fragment的y + fragment高度/2 - Dialog高度/2 - 状态栏高度(Gravity.TOP会自动偏移状态栏的高度)
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lp.y = location[1] + fragmentHeight / 2 - dialogHeight / 2 - mStatusBarHeight;
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// 8、设置Window的属性
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dialogWindow.setAttributes(lp);
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// 9、展示出Dialog
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dialogView.setVisibility(View.VISIBLE);
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}
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});
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}
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public static int getStatusBarHeight(Context context) {
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/**
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* 获取状态栏高度——方法2
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* */
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int statusBarHeight = -1;
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try {
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Class<?> clazz = Class.forName("com.android.internal.R$dimen");
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Object object = clazz.newInstance();
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int height = Integer.parseInt(clazz.getField("status_bar_height")
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.get(object).toString());
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statusBarHeight = context.getResources().getDimensionPixelSize(height);
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} catch (Exception e) {
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e.printStackTrace();
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}
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return statusBarHeight;
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}
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}
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