Android之全屏下软键盘弹出布局移动问题

本文主要记录一些零碎的东西

主要记录android 下全屏界面时软键盘弹出后布局移动的解决方案

先看看正常的布局（hellword文字在屏幕正中间）

全屏下软键盘弹出后结果

可以看见整个布局都上去了，这样肯定不好，想背景不移动，只是输入框移动，效果图

看看怎么实现的吧

布局文件背景和需要移动的控件肯定是需要分开的

<?xml version="1.0" encoding="utf-8"?>

全部测试代码，其他地方不要要任何改动

核心部分是 ViewTreeObserver.OnGlobalLayoutListener

import android.graphics.Rect;import android.support.annotation.NonNull;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.view.ViewTreeObserver;import android.view.WindowManager;/** * created by slack * on 17/5/4 上午10:39 * 解决全屏下 软键盘弹出布局移动问题 * 其中 moveRoot 是 需要移动布局的父布局(最好全屏) *      moveView 是需要移动的布局 */public class MainActivity extends AppCompatActivity {    View moveRoot;    View moveView;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        // full screen        this.getWindow().setFlags(                WindowManager.LayoutParams.FLAG_FULLSCREEN,                WindowManager.LayoutParams.FLAG_FULLSCREEN);        moveRoot = findViewById(R.id.move_root);        moveView = findViewById(R.id.move_view);        addSoftKeyBoardListener(moveRoot,moveView);    }    private ViewTreeObserver.OnGlobalLayoutListener mSoftKeyBoardListener;    private class SoftKeyBoardListener implements ViewTreeObserver.OnGlobalLayoutListener {        private View root;        private View view;        int lastHeight = 0;        int lastBottom = -1;        SoftKeyBoardListener(View r,View v) {            root = r;            view = v;        }        @Override        public void onGlobalLayout() {            Rect rect = new Rect();            root.getWindowVisibleDisplayFrame(rect);            if (lastBottom == -1) {                lastBottom = rect.bottom;                return;            }            int nb = rect.bottom;            int ob = lastBottom;            if (nb < ob) {                // 键盘显示了， 滑上去                int[] location = new int[2];                view.getLocationInWindow(location);                int scrollHeight = (location[1] + view.getHeight()) - nb;                root.scrollTo(0, scrollHeight);                lastHeight = scrollHeight;            }            else if (nb > ob) {                // 键盘隐藏了, 滑下来                root.scrollTo(0, 0);            }            if (nb != ob) {                lastBottom = nb;            }        }    }    public void removeSoftKeyBoardListener(@NonNull View root) {        if(mSoftKeyBoardListener != null){            root.getViewTreeObserver().removeOnGlobalLayoutListener(mSoftKeyBoardListener);        }    }    public void addSoftKeyBoardListener(final View root, final View view) {        mSoftKeyBoardListener = new SoftKeyBoardListener(root,view);        root.getViewTreeObserver().addOnGlobalLayoutListener(mSoftKeyBoardListener);    }    @Override    protected void onDestroy() {        super.onDestroy();        removeSoftKeyBoardListener(moveRoot);    }}

－－－－－－－－网上发现一段其他的计算弹出软键盘高度的代码，更新－－－－－－－－－－－

public void addOnSoftKeyBoardVisibleListener(final View root, final IKeyBoardVisibleListener listener) {        root.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {            @Override            public void onGlobalLayout() {                Rect rect = new Rect();                root.getWindowVisibleDisplayFrame(rect);                //计算出可见屏幕的高度                int displayHight = rect.bottom - rect.top;                //获得屏幕整体的高度                int hight = root.getHeight();                //获得键盘高度                int keyboardHeight = hight-displayHight;                boolean visible = (double) displayHight / hight < 0.8;                if(visible){                    root.scrollTo(0, keyboardHeight);                }else {                    root.scrollTo(0, 0);                }                if(visible != isVisibleForLast){                    listener.onSoftKeyBoardVisible(visible,keyboardHeight );                }                isVisibleForLast = visible;            }        });    }    interface IKeyBoardVisibleListener{        void onSoftKeyBoardVisible(boolean visible , int windowBottom);    }

修改了一下，添加了一个自动滑动，onGlobalLayout()里只要有view 滑动了，整个布局的随着软键盘弹出的滑动就不会执行了，

可以计算出类似华为这样的有底部导航栏的手机的软键盘弹出高度。

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