[Java] InputMethodManager

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center"
    tools:context=".MainActivity">

    <EditText
        android:id="@+id/etContents"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:hint="James Kim"
        android:textSize="26dp"
        android:textStyle="bold" />

    <Button
        android:id="@+id/btnShowKeyboard"
        android:layout_width="220dp"
        android:layout_height="65dp"
        android:textAllCaps="false"
        android:text="Show Keyboard"
        android:textSize="20dp"
        android:textStyle="italic"
        android:layout_marginTop="30dp" />

    <Button
        android:id="@+id/btnCloseKeyboard"
        android:layout_width="220dp"
        android:layout_height="65dp"
        android:textAllCaps="false"
        android:text="Close Keyboard"
        android:textSize="20dp"
        android:textStyle="italic"
        android:layout_marginBottom="300dp"/>

</LinearLayout>

activity_main.xml

 

 

 

 

 

 

MainActivity.java

package com.jwsoft.javaproject;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {

    private Button btnShowKeyboard;
    private Button btnCloseKeyboard;
    private EditText etContents;

    private InputMethodManager inputMethodManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        btnShowKeyboard = findViewById(R.id.btnShowKeyboard);
        btnCloseKeyboard = findViewById(R.id.btnCloseKeyboard);
        etContents = findViewById(R.id.etContents);

        inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);

        btnShowKeyboard.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                etContents.requestFocus();      // 포커스가 있어야 키보드가 노출됨.
                inputMethodManager.showSoftInput(etContents, InputMethodManager.SHOW_IMPLICIT);
            }
        });

        btnCloseKeyboard.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                inputMethodManager.hideSoftInputFromWindow(
                        getCurrentFocus().getWindowToken(),
                        InputMethodManager.HIDE_NOT_ALWAYS
                );
            }
        });
    }

}

실행 결과