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【Android】キーボード関連の処理

Last updated at Posted at 2022-03-03

はじめに

キーボード関連の処理をメソッド形式でメモ。

コード

キーボード表示状態の確認

fun keyboardVisibility(view: View) =
	view.height > Rect().apply { view.getWindowVisibleDisplayFrame(this) }.height()

キーボードの表示

fun showKeyboard(editText: EditText) {
	editText.requestFocus()
	val imm = getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
	imm.showSoftInput(editText, 0)
}

キーボードの非表示

fun hideKeyboard() {
	val imm = getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
	imm.hideSoftInputFromWindow(currentFocus?.windowToken, 0)
	currentFocus?.clearFocus()
}

キーボード表示状態変更リスナー

fun View.setKeyboardListener() {
	this.viewTreeObserver.addOnGlobalLayoutListener {
		val keyboardVisibility = keyboardVisibility(this)
		if (keyboardVisibility) {
			Toast.makeText(applicationContext, "open", Toast.LENGTH_SHORT).show()
		} else {
			Toast.makeText(applicationContext, "close", Toast.LENGTH_SHORT).show()
		}
	}
}

キーボード表示状態変更リスナー
※リスナー実行後、リスナーを削除する場合

fun View.setKeyboardListener() {
	this.viewTreeObserver.addOnGlobalLayoutListener(object : ViewTreeObserver.OnGlobalLayoutListener {
		override fun onGlobalLayout() {
			val keyboardVisibility = keyboardVisibility(this@setKeyboardListener)
			if (keyboardVisibility) {
				Toast.makeText(applicationContext, "open", Toast.LENGTH_SHORT).show()
			} else {
				Toast.makeText(applicationContext, "close", Toast.LENGTH_SHORT).show()
			}
			//処理実行後、リスナーを無効にする
			this@setKeyboardListener.viewTreeObserver.removeOnGlobalLayoutListener(this)
		}
	})
}
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