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KeyboardUtil.java
/*
* Copyright 2015 Mike Penz All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.mikepenz.materialdrawer.util;
import android.app.Activity;
import android.graphics.Rect;
import android.os.Build;
import android.view.View;
import android.view.ViewTreeObserver;
import android.view.inputmethod.InputMethodManager;
import com.mikepenz.materialize.util.UIUtils;
/**
* Created by mikepenz on 14.03.15.
* This class implements a hack to change the layout padding on bottom if the keyboard is shown
* to allow long lists with editTextViews
* Basic idea for this solution found here: http://stackoverflow.com/a/9108219/325479
*/
public class KeyboardUtil {
private View decorView;
private View contentView;
private float initialDpDiff = -1;
public KeyboardUtil(Activity act, View contentView) {
this.decorView = act.getWindow().getDecorView();
this.contentView = contentView;
//only required on newer android versions. it was working on API level 19
if (Build.VERSION.SDK_INT >= 19) {
decorView.getViewTreeObserver().addOnGlobalLayoutListener(onGlobalLayoutListener);
}
}
public void enable() {
if (Build.VERSION.SDK_INT >= 19) {
decorView.getViewTreeObserver().addOnGlobalLayoutListener(onGlobalLayoutListener);
}
}
public void disable() {
if (Build.VERSION.SDK_INT >= 19) {
decorView.getViewTreeObserver().removeOnGlobalLayoutListener(onGlobalLayoutListener);
}
}
//a small helper to allow showing the editText focus
ViewTreeObserver.OnGlobalLayoutListener onGlobalLayoutListener = new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
Rect r = new Rect();
//r will be populated with the coordinates of your view that area still visible.
decorView.getWindowVisibleDisplayFrame(r);
//get the height diff as dp
float heightDiffDp = UIUtils.convertPixelsToDp(decorView.getRootView().getHeight() - (r.bottom - r.top), decorView.getContext());
//set the initialDpDiff at the beginning. (on my phone this was 73dp)
if (initialDpDiff == -1) {
initialDpDiff = heightDiffDp;
}
//if it could be a keyboard add the padding to the view
if (heightDiffDp - initialDpDiff > 100) { // if more than 100 pixels, its probably a keyboard...
//check if the padding is 0 (if yes set the padding for the keyboard)
if (contentView.getPaddingBottom() == 0) {
//set the padding of the contentView for the keyboard
contentView.setPadding(0, 0, 0, (int) UIUtils.convertDpToPixel((heightDiffDp - initialDpDiff), decorView.getContext()));
}
} else {
//check if the padding is != 0 (if yes reset the padding)
if (contentView.getPaddingBottom() != 0) {
//reset the padding of the contentView
contentView.setPadding(0, 0, 0, 0);
}
}
}
};
/**
* Helper to hide the keyboard
*
* @param act
*/
public static void hideKeyboard(Activity act) {
if (act != null && act.getCurrentFocus() != null) {
InputMethodManager inputMethodManager = (InputMethodManager) act.getSystemService(Activity.INPUT_METHOD_SERVICE);
inputMethodManager.hideSoftInputFromWindow(act.getCurrentFocus().getWindowToken(), 0);
}
}
}
@TheFinestArtist

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commented Sep 24, 2015

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