85 lines
3.2 KiB
Java
85 lines
3.2 KiB
Java
package com.gh.common.util;
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import android.app.Activity;
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import android.graphics.Rect;
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import android.os.Build;
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import android.view.View;
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import android.view.ViewTreeObserver;
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import android.widget.FrameLayout;
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/**
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* 用于解决因为沉浸式状态栏(自定义)时键盘不遮挡输入框
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*/
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public class SoftInputHidWidgetUtils {
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private View mChildOfContent;
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private int usableHeightPrevious;
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private FrameLayout.LayoutParams frameLayoutParams;
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private int contentHeight;
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private boolean isfirst = true;
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private int statusBarHeight;
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public static void assistActivity(Activity activity) {
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if (Build.VERSION.SDK_INT >= 19) {
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new SoftInputHidWidgetUtils(activity);
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}
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}
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private SoftInputHidWidgetUtils(Activity activity) {
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statusBarHeight = getStatusBarHeight(activity);
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FrameLayout content = (FrameLayout)activity.findViewById(android.R.id.content);
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mChildOfContent = content.getChildAt(0);
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//界面出现变动都会调用这个监听事件
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mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
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public void onGlobalLayout() {
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if (isfirst) {
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contentHeight = mChildOfContent.getHeight();//兼容华为等机型
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isfirst = false;
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}
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possiblyResizeChildOfContent();
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}
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});
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frameLayoutParams = (FrameLayout.LayoutParams) mChildOfContent.getLayoutParams();
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}
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//重新调整跟布局的高度
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private void possiblyResizeChildOfContent() {
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int usableHeightNow = computeUsableHeight();
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//当前可见高度和上一次可见高度不一致 布局变动
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if (usableHeightNow != usableHeightPrevious) {
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int usableHeightSansKeyboard = mChildOfContent.getRootView().getHeight();
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int heightDifference = usableHeightSansKeyboard - usableHeightNow;
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if (heightDifference > (usableHeightSansKeyboard / 4)) {
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// keyboard probably just became visible
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT){
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frameLayoutParams.height = usableHeightSansKeyboard - heightDifference + statusBarHeight;
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} else {
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frameLayoutParams.height = usableHeightSansKeyboard - heightDifference;
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}
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} else {
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frameLayoutParams.height = contentHeight;
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}
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mChildOfContent.requestLayout();
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usableHeightPrevious = usableHeightNow;
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}
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}
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/**
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* 获取改变之后界面的可用高度（可以为开发者显示内容的高度）
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* @return
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*/
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private int computeUsableHeight() {
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Rect r = new Rect();
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mChildOfContent.getWindowVisibleDisplayFrame(r);//获取到的rect就是界面除去标题栏、除去软键盘挡住部分，所剩下的域
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return (r.bottom - r.top);
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}
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public static int getStatusBarHeight(Activity activity) {
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//获取状态栏的高度
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int resourceId = activity.getResources().getIdentifier("status_bar_height", "dimen", "android");
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return activity.getResources().getDimensionPixelSize(resourceId);
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}
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}
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