97 lines
3.5 KiB
Java
97 lines
3.5 KiB
Java
/*
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.widget;
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import android.content.Context;
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import android.util.AttributeSet;
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import android.view.View;
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import android.view.inputmethod.EditorInfo;
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import android.view.inputmethod.InputConnection;
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import android.view.inputmethod.InputMethodManager;
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/**
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* EditText that keeps track of the IME state, specifically its input connection. This is useful
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* for clients who request the IME before the system has established a connection.
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* @hide
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*/
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public class ImeAwareEditText extends EditText {
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private boolean mHasPendingShowSoftInputRequest;
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final Runnable mRunShowSoftInputIfNecessary = () -> showSoftInputIfNecessary();
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public ImeAwareEditText(Context context) {
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super(context, null);
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}
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public ImeAwareEditText(Context context, AttributeSet attrs) {
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super(context, attrs);
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}
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public ImeAwareEditText(Context context, AttributeSet attrs, int defStyleAttr) {
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super(context, attrs, defStyleAttr);
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}
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public ImeAwareEditText(Context context, AttributeSet attrs, int defStyleAttr,
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int defStyleRes) {
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super(context, attrs, defStyleAttr, defStyleRes);
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}
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/**
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* This method is called back by the system when the system is about to establish a connection
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* to the current input method.
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*
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* <p>This is a good and reliable signal to schedule a pending task to call
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* {@link InputMethodManager#showSoftInput(View, int)}.</p>
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*
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* @param editorInfo context about the text input field.
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* @return {@link InputConnection} to be passed to the input method.
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*/
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@Override
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public InputConnection onCreateInputConnection(EditorInfo editorInfo) {
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final InputConnection ic = super.onCreateInputConnection(editorInfo);
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if (mHasPendingShowSoftInputRequest) {
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removeCallbacks(mRunShowSoftInputIfNecessary);
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post(mRunShowSoftInputIfNecessary);
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}
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return ic;
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}
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private void showSoftInputIfNecessary() {
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if (mHasPendingShowSoftInputRequest) {
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final InputMethodManager imm =
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getContext().getSystemService(InputMethodManager.class);
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imm.showSoftInput(this, 0);
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mHasPendingShowSoftInputRequest = false;
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}
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}
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public void scheduleShowSoftInput() {
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final InputMethodManager imm = getContext().getSystemService(InputMethodManager.class);
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if (imm.hasActiveInputConnection(this)) {
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// This means that ImeAwareEditText is already connected to the IME.
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// InputMethodManager#showSoftInput() is guaranteed to pass client-side focus check.
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mHasPendingShowSoftInputRequest = false;
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removeCallbacks(mRunShowSoftInputIfNecessary);
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imm.showSoftInput(this, 0);
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return;
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}
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// Otherwise, InputMethodManager#showSoftInput() should be deferred after
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// onCreateInputConnection().
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mHasPendingShowSoftInputRequest = true;
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}
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}
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