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1.写一个软键盘输入法管理类。

package com.phone.common_library.manager;

import android.app.Activity;
import android.content.Context;
import android.graphics.Rect;
import android.view.View;
import android.view.ViewTreeObserver;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;

import com.phone.common_library.callback.OnSoftKeyBoardChangeListener;

import java.util.List;

/**
 * author    : Urasaki
 * e-mail    : 1164688204@qq.com
 * date      : 2020/3/11 9:23
 * introduce : 软键盘管理类
 */

public class SoftKeyboardManager {

    private static final String TAG = SoftKeyboardManager.class.getSimpleName();
    private View rootView;//activity的根视图
    private int rootViewVisibleHeight;//纪录根视图的显示高度
    private OnSoftKeyBoardChangeListener onSoftKeyBoardChangeListener;

    public SoftKeyboardManager(Activity activity) {
        //获取activity的根视图
        rootView = activity.getWindow().getDecorView();

        //监听视图树中全局布局发生改变或者视图树中的某个视图的可视状态发生改变
        rootView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                //获取当前根视图在屏幕上显示的大小
                Rect r = new Rect();
                rootView.getWindowVisibleDisplayFrame(r);

                int visibleHeight = r.height();
                System.out.println(""+visibleHeight);
                if (rootViewVisibleHeight == 0) {
                    rootViewVisibleHeight = visibleHeight;
                    return;
                }

                //根视图显示高度没有变化，可以看作软键盘显示／隐藏状态没有改变
                if (rootViewVisibleHeight == visibleHeight) {
                    return;
                }

                //根视图显示高度变小超过200，可以看作软键盘显示了
                if (rootViewVisibleHeight - visibleHeight > 200) {
                    if (onSoftKeyBoardChangeListener != null) {
                        onSoftKeyBoardChangeListener.keyBoardShow(rootViewVisibleHeight - visibleHeight);
                    }
                    rootViewVisibleHeight = visibleHeight;
                    return;
                }

                //根视图显示高度变大超过200，可以看作软键盘隐藏了
                if (visibleHeight - rootViewVisibleHeight > 200) {
                    if (onSoftKeyBoardChangeListener != null) {
                        onSoftKeyBoardChangeListener.keyBoardHide(visibleHeight - rootViewVisibleHeight);
                    }
                    rootViewVisibleHeight = visibleHeight;
                    return;
                }

            }
        });
    }

    private void setOnSoftKeyBoardChangeListener(OnSoftKeyBoardChangeListener onSoftKeyBoardChangeListener) {
        this.onSoftKeyBoardChangeListener = onSoftKeyBoardChangeListener;
    }

    public static void setListener(Activity activity, OnSoftKeyBoardChangeListener onSoftKeyBoardChangeListener) {
        SoftKeyboardManager softKeyBoardListener = new SoftKeyboardManager(activity);
        softKeyBoardListener.setOnSoftKeyBoardChangeListener(onSoftKeyBoardChangeListener);
    }

    /**
     * 显示软键盘（输入法）（可用于Activity，Fragment）
     *
     * @param activity
     * @param editText
     */
    public static void showInputMethod(final Activity activity, final EditText editText) {
        InputMethodManager inputMethodManager = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
        inputMethodManager.showSoftInput(editText, InputMethodManager.SHOW_IMPLICIT);
    }


    /**
     * 隐藏软键盘（输入法）（可用于Activity，Fragment）
     *
     * @param activity
     */
    public static void hideInputMethod(final Activity activity) {
        InputMethodManager inputMethodManager = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
        if (inputMethodManager.isActive() && activity.getCurrentFocus() != null) {
            if (activity.getCurrentFocus().getWindowToken() != null) {
                inputMethodManager.hideSoftInputFromWindow(activity.getCurrentFocus().getWindowToken(),
                        InputMethodManager.HIDE_NOT_ALWAYS);
            }
        }
    }

    /**
     * 显示软键盘（输入法）（只适用于Activity，不适用于Fragment）
     */
    public static void showSoftKeyboard2(Activity activity) {
        View view = activity.getCurrentFocus();
        if (view != null) {
            InputMethodManager inputMethodManager = (InputMethodManager) activity.getSystemService(Activity.INPUT_METHOD_SERVICE);
            if (inputMethodManager != null) {
                inputMethodManager.showSoftInput(view, InputMethodManager.SHOW_IMPLICIT);
            }
        }
    }

    /**
     * 隐藏软键盘（输入法）（只适用于Activity，不适用于Fragment）
     */
    public static void hideSoftKeyboard(Activity activity) {
        View view = activity.getCurrentFocus();
        if (view != null) {
            InputMethodManager inputMethodManager = (InputMethodManager) activity.getSystemService(Activity.INPUT_METHOD_SERVICE);
            if (inputMethodManager != null) {
                inputMethodManager.hideSoftInputFromWindow(view.getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
            }
        }
    }

    /**
     * 隐藏软键盘（输入法）（可用于Activity，Fragment）
     */
    public static void hideSoftKeyboard(Context context, List<View> viewList) {
        if (viewList == null) return;

        InputMethodManager inputMethodManager = (InputMethodManager) context.getSystemService(Activity.INPUT_METHOD_SERVICE);

        for (View v : viewList) {
            if (inputMethodManager != null) {
                inputMethodManager.hideSoftInputFromWindow(v.getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
            }
        }
    }

}

2.显示输入法。

//初始化EditText
EditText edtInput = (EditText) findViewById(R.id.edt_input);
//显示输入法（可用于Activity，Fragment）
SoftKeyboardManager.showInputMethod(rxAppCompatActivity, edtInput);

3.强制隐藏输入法。

//初始化EditText
EditText edtInput = (EditText) findViewById(R.id.edt_input);
//强制隐藏输入法（可用于Activity，Fragment）
SoftKeyboardManager.hideInputMethod(this);

如对此有疑问，请联系qq1164688204。

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