我有一个Activity，其中有EditText个。{当用户点击第一个EditText时，软键盘会打开以在其中输入一些值。我想在软键盘打开时以及当用户点击第一个View时以及当软键盘关闭时，将Gone的其他EditText可见性设置为EditText按下后退按钮上的View相同。然后我想将其他EditText的可见性设置为可见。
在Android上的第一个{{1}}点击软键盘时，是否有任何侦听器或回调或任何黑客攻击？
答案 0 :(得分：76)
仅当您的活动的android:windowSoftInputMode在清单中设置为adjustResize时才有效。您可以使用布局侦听器来查看活动的根布局是否通过键盘调整大小。
我为我的活动使用类似下面的基类：
public class BaseActivity extends Activity {
private ViewTreeObserver.OnGlobalLayoutListener keyboardLayoutListener = new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
int heightDiff = rootLayout.getRootView().getHeight() - rootLayout.getHeight();
int contentViewTop = getWindow().findViewById(Window.ID_ANDROID_CONTENT).getTop();
LocalBroadcastManager broadcastManager = LocalBroadcastManager.getInstance(BaseActivity.this);
if(heightDiff <= contentViewTop){
onHideKeyboard();
Intent intent = new Intent("KeyboardWillHide");
broadcastManager.sendBroadcast(intent);
} else {
int keyboardHeight = heightDiff - contentViewTop;
onShowKeyboard(keyboardHeight);
Intent intent = new Intent("KeyboardWillShow");
intent.putExtra("KeyboardHeight", keyboardHeight);
broadcastManager.sendBroadcast(intent);
}
}
};
private boolean keyboardListenersAttached = false;
private ViewGroup rootLayout;
protected void onShowKeyboard(int keyboardHeight) {}
protected void onHideKeyboard() {}
protected void attachKeyboardListeners() {
if (keyboardListenersAttached) {
return;
}
rootLayout = (ViewGroup) findViewById(R.id.rootLayout);
rootLayout.getViewTreeObserver().addOnGlobalLayoutListener(keyboardLayoutListener);
keyboardListenersAttached = true;
}
@Override
protected void onDestroy() {
super.onDestroy();
if (keyboardListenersAttached) {
rootLayout.getViewTreeObserver().removeGlobalOnLayoutListener(keyboardLayoutListener);
}
}
}
以下示例活动使用此功能在键盘显示时隐藏视图，并在隐藏键盘时再次显示。
xml布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/rootLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ScrollView
android:id="@+id/scrollView"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
>
<!-- omitted for brevity -->
</ScrollView>
<LinearLayout android:id="@+id/bottomContainer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
>
<!-- omitted for brevity -->
</LinearLayout>
</LinearLayout>
活动：
public class TestActivity extends BaseActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.test_activity);
attachKeyboardListeners();
}
@Override
protected void onShowKeyboard(int keyboardHeight) {
// do things when keyboard is shown
bottomContainer.setVisibility(View.GONE);
}
@Override
protected void onHideKeyboard() {
// do things when keyboard is hidden
bottomContainer.setVisibility(View.VISIBLE);
}
}
答案 1 :(得分：64)
正如维克拉姆在评论中所指出的那样，检测软键盘是否显示或已经消失只能通过一些丑陋的黑客攻击。
或许在edittext 上设置焦点监听器就足够了：
yourEditText.setOnFocusChangeListener(new OnFocusChangeListener() {
@Override
public void onFocusChange(View v, boolean hasFocus) {
if (hasFocus) {
//got focus
} else {
//lost focus
}
}
});
答案 2 :(得分：61)
带有令人敬畏的KeyboardVisibilityEvent库的小蛋糕： https://android-arsenal.com/details/1/2519
KeyboardVisibilityEvent.setEventListener(
getActivity(),
new KeyboardVisibilityEventListener() {
@Override
public void onVisibilityChanged(boolean isOpen) {
// some code depending on keyboard visiblity status
}
});
支持min SDK版本为14.0 for 2.0.0
答案 3 :(得分：44)
活动：
final View activityRootView = findViewById(R.id.activityRoot);
activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
Rect r = new Rect();
activityRootView.getWindowVisibleDisplayFrame(r);
int heightDiff = view.getRootView().getHeight() - (r.bottom - r.top);
if (heightDiff > 100) {
//enter your code here
}else{
//enter code for hid
}
}
});
For Fragment：
view = inflater.inflate(R.layout.live_chat_fragment, null);
view.getViewTreeObserver().addOnGlobalLayoutListener(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.
view.getWindowVisibleDisplayFrame(r);
int heightDiff = view.getRootView().getHeight() - (r.bottom - r.top);
if (heightDiff > 500) { // if more than 100 pixels, its probably a keyboard...
}
}
});
答案 4 :(得分：31)
Jaap's回答不适用于AppCompatActivity。而是获取状态栏和导航栏等的高度，并与应用程序的窗口大小进行比较。
像这样：
private ViewTreeObserver.OnGlobalLayoutListener keyboardLayoutListener = new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
// navigation bar height
int navigationBarHeight = 0;
int resourceId = getResources().getIdentifier("navigation_bar_height", "dimen", "android");
if (resourceId > 0) {
navigationBarHeight = getResources().getDimensionPixelSize(resourceId);
}
// status bar height
int statusBarHeight = 0;
resourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
if (resourceId > 0) {
statusBarHeight = getResources().getDimensionPixelSize(resourceId);
}
// display window size for the app layout
Rect rect = new Rect();
getWindow().getDecorView().getWindowVisibleDisplayFrame(rect);
// screen height - (user app height + status + nav) ..... if non-zero, then there is a soft keyboard
int keyboardHeight = rootLayout.getRootView().getHeight() - (statusBarHeight + navigationBarHeight + rect.height());
if (keyboardHeight <= 0) {
onHideKeyboard();
} else {
onShowKeyboard(keyboardHeight);
}
}
};
答案 5 :(得分：11)
你可以尝试一下：
private void initKeyBoardListener() {
// Минимальное значение клавиатуры.
// Threshold for minimal keyboard height.
final int MIN_KEYBOARD_HEIGHT_PX = 150;
// Окно верхнего уровня view.
// Top-level window decor view.
final View decorView = getWindow().getDecorView();
// Регистрируем глобальный слушатель. Register global layout listener.
decorView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
// Видимый прямоугольник внутри окна.
// Retrieve visible rectangle inside window.
private final Rect windowVisibleDisplayFrame = new Rect();
private int lastVisibleDecorViewHeight;
@Override
public void onGlobalLayout() {
decorView.getWindowVisibleDisplayFrame(windowVisibleDisplayFrame);
final int visibleDecorViewHeight = windowVisibleDisplayFrame.height();
if (lastVisibleDecorViewHeight != 0) {
if (lastVisibleDecorViewHeight > visibleDecorViewHeight + MIN_KEYBOARD_HEIGHT_PX) {
Log.d("Pasha", "SHOW");
} else if (lastVisibleDecorViewHeight + MIN_KEYBOARD_HEIGHT_PX < visibleDecorViewHeight) {
Log.d("Pasha", "HIDE");
}
}
// Сохраняем текущую высоту view до следующего вызова.
// Save current decor view height for the next call.
lastVisibleDecorViewHeight = visibleDecorViewHeight;
}
});
}
答案 6 :(得分：3)
您可以使用我的Rx扩展功能（科特林）。
/**
* @return [Observable] to subscribe of keyboard visibility changes.
*/
fun AppCompatActivity.keyboardVisibilityChanges(): Observable<Boolean> {
// flag indicates whether keyboard is open
var isKeyboardOpen = false
val notifier: BehaviorSubject<Boolean> = BehaviorSubject.create()
// approximate keyboard height
val approximateKeyboardHeight = dip(100)
// device screen height
val screenHeight: Int = getScreenHeight()
val visibleDisplayFrame = Rect()
val viewTreeObserver = window.decorView.viewTreeObserver
val onDrawListener = ViewTreeObserver.OnDrawListener {
window.decorView.getWindowVisibleDisplayFrame(visibleDisplayFrame)
val keyboardHeight = screenHeight - (visibleDisplayFrame.bottom - visibleDisplayFrame.top)
val keyboardOpen = keyboardHeight >= approximateKeyboardHeight
val hasChanged = isKeyboardOpen xor keyboardOpen
if (hasChanged) {
isKeyboardOpen = keyboardOpen
notifier.onNext(keyboardOpen)
}
}
val lifeCycleObserver = object : GenericLifecycleObserver {
override fun onStateChanged(source: LifecycleOwner, event: Lifecycle.Event?) {
if (source.lifecycle.currentState == Lifecycle.State.DESTROYED) {
viewTreeObserver.removeOnDrawListener(onDrawListener)
source.lifecycle.removeObserver(this)
notifier.onComplete()
}
}
}
viewTreeObserver.addOnDrawListener(onDrawListener)
lifecycle.addObserver(lifeCycleObserver)
return notifier
.doOnDispose {
viewTreeObserver.removeOnDrawListener(onDrawListener)
lifecycle.removeObserver(lifeCycleObserver)
}
.onTerminateDetach()
.hide()
}
示例：
(context as AppCompatActivity)
.keyboardVisibilityChanges()
.subscribeBy { isKeyboardOpen ->
// your logic
}
答案 7 :(得分：2)
对于在 Kotlin 内部片段中使用，这是一个常见用例，使用 KeyboardVisibilityEvent 库非常容易。
在 build.gradle 中：
implementation 'net.yslibrary.keyboardvisibilityevent:keyboardvisibilityevent:3.0.0-RC2'
在片段中：
activity?.let {
KeyboardVisibilityEvent.setEventListener(it,object: KeyboardVisibilityEventListener {
override fun onVisibilityChanged(isOpen: Boolean) {
if (isOpen) Toast.makeText(context,"Keyboard is opened",Toast.LENGTH_SHORT).show()
else Toast.makeText(context,"Keyboard is closed",Toast.LENGTH_SHORT).show()
}
})
}
答案 8 :(得分：1)
使用此课程
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicBoolean;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.ViewGroup;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;
public class SoftKeyboard implements View.OnFocusChangeListener
{
private static final int CLEAR_FOCUS = 0;
private ViewGroup layout;
private int layoutBottom;
private InputMethodManager im;
private int[] coords;
private boolean isKeyboardShow;
private SoftKeyboardChangesThread softKeyboardThread;
private List<EditText> editTextList;
private View tempView; // reference to a focused EditText
public SoftKeyboard(ViewGroup layout, InputMethodManager im)
{
this.layout = layout;
keyboardHideByDefault();
initEditTexts(layout);
this.im = im;
this.coords = new int[2];
this.isKeyboardShow = false;
this.softKeyboardThread = new SoftKeyboardChangesThread();
this.softKeyboardThread.start();
}
public void openSoftKeyboard()
{
if(!isKeyboardShow)
{
layoutBottom = getLayoutCoordinates();
im.toggleSoftInput(0, InputMethodManager.SHOW_IMPLICIT);
softKeyboardThread.keyboardOpened();
isKeyboardShow = true;
}
}
public void closeSoftKeyboard()
{
if(isKeyboardShow)
{
im.toggleSoftInput(InputMethodManager.HIDE_IMPLICIT_ONLY, 0);
isKeyboardShow = false;
}
}
public void setSoftKeyboardCallback(SoftKeyboardChanged mCallback)
{
softKeyboardThread.setCallback(mCallback);
}
public void unRegisterSoftKeyboardCallback()
{
softKeyboardThread.stopThread();
}
public interface SoftKeyboardChanged
{
public void onSoftKeyboardHide();
public void onSoftKeyboardShow();
}
private int getLayoutCoordinates()
{
layout.getLocationOnScreen(coords);
return coords[1] + layout.getHeight();
}
private void keyboardHideByDefault()
{
layout.setFocusable(true);
layout.setFocusableInTouchMode(true);
}
/*
* InitEditTexts now handles EditTexts in nested views
* Thanks to Francesco Verheye (verheye.francesco@gmail.com)
*/
private void initEditTexts(ViewGroup viewgroup)
{
if(editTextList == null)
editTextList = new ArrayList<EditText>();
int childCount = viewgroup.getChildCount();
for(int i=0; i<= childCount-1;i++)
{
View v = viewgroup.getChildAt(i);
if(v instanceof ViewGroup)
{
initEditTexts((ViewGroup) v);
}
if(v instanceof EditText)
{
EditText editText = (EditText) v;
editText.setOnFocusChangeListener(this);
editText.setCursorVisible(true);
editTextList.add(editText);
}
}
}
/*
* OnFocusChange does update tempView correctly now when keyboard is still shown
* Thanks to Israel Dominguez (dominguez.israel@gmail.com)
*/
@Override
public void onFocusChange(View v, boolean hasFocus)
{
if(hasFocus)
{
tempView = v;
if(!isKeyboardShow)
{
layoutBottom = getLayoutCoordinates();
softKeyboardThread.keyboardOpened();
isKeyboardShow = true;
}
}
}
// This handler will clear focus of selected EditText
private final Handler mHandler = new Handler()
{
@Override
public void handleMessage(Message m)
{
switch(m.what)
{
case CLEAR_FOCUS:
if(tempView != null)
{
tempView.clearFocus();
tempView = null;
}
break;
}
}
};
private class SoftKeyboardChangesThread extends Thread
{
private AtomicBoolean started;
private SoftKeyboardChanged mCallback;
public SoftKeyboardChangesThread()
{
started = new AtomicBoolean(true);
}
public void setCallback(SoftKeyboardChanged mCallback)
{
this.mCallback = mCallback;
}
@Override
public void run()
{
while(started.get())
{
// Wait until keyboard is requested to open
synchronized(this)
{
try
{
wait();
} catch (InterruptedException e)
{
e.printStackTrace();
}
}
int currentBottomLocation = getLayoutCoordinates();
// There is some lag between open soft-keyboard function and when it really appears.
while(currentBottomLocation == layoutBottom && started.get())
{
currentBottomLocation = getLayoutCoordinates();
}
if(started.get())
mCallback.onSoftKeyboardShow();
// When keyboard is opened from EditText, initial bottom location is greater than layoutBottom
// and at some moment equals layoutBottom.
// That broke the previous logic, so I added this new loop to handle this.
while(currentBottomLocation >= layoutBottom && started.get())
{
currentBottomLocation = getLayoutCoordinates();
}
// Now Keyboard is shown, keep checking layout dimensions until keyboard is gone
while(currentBottomLocation != layoutBottom && started.get())
{
synchronized(this)
{
try
{
wait(500);
} catch (InterruptedException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
currentBottomLocation = getLayoutCoordinates();
}
if(started.get())
mCallback.onSoftKeyboardHide();
// if keyboard has been opened clicking and EditText.
if(isKeyboardShow && started.get())
isKeyboardShow = false;
// if an EditText is focused, remove its focus (on UI thread)
if(started.get())
mHandler.obtainMessage(CLEAR_FOCUS).sendToTarget();
}
}
public void keyboardOpened()
{
synchronized(this)
{
notify();
}
}
public void stopThread()
{
synchronized(this)
{
started.set(false);
notify();
}
}
}
}
在Android Manifest中，android:windowSoftInputMode="adjustResize"是必需的。
/*
Somewhere else in your code
*/
RelativeLayout mainLayout = findViewById(R.layout.main_layout); // You must use the layout root
InputMethodManager im = (InputMethodManager)getSystemService(Service.INPUT_METHOD_SERVICE);
/*
Instantiate and pass a callback
*/
SoftKeyboard softKeyboard;
softKeyboard = new SoftKeyboard(mainLayout, im);
softKeyboard.setSoftKeyboardCallback(new SoftKeyboard.SoftKeyboardChanged() {
@Override
public void onSoftKeyboardHide() {
// Code here
}
@Override
public void onSoftKeyboardShow() {
// Code here
}
});
/*
Open or close the soft keyboard easily
*/
softKeyboard.openSoftKeyboard();
softKeyboard.closeSoftKeyboard();
/* Prevent memory leaks:*/
@Override
public void onDestroy() {
super.onDestroy();
softKeyboard.unRegisterSoftKeyboardCallback();
}
P.S - 完全取自here。
答案 9 :(得分：1)
对于equals()和FragmentActivity的情况，接受来自@Jaap的解决方案对我不起作用。
这是我的解决方案：
adjustResize答案 10 :(得分：1)
不依赖于窗口调整的软键盘监听器的不同实现＆amp;因此在多窗口世界中也能很好地工作。它当然有它自己的怪癖，但是它们与完全破碎的多窗口和窗口调整大小一起检测无关。
欣赏改进的想法！
答案 11 :(得分：1)
如果可以，请尝试扩展EditText并覆盖＆＃39; onKeyPreIme＆＃39;方法
@Override
public void setOnEditorActionListener(final OnEditorActionListener listener) {
mEditorListener = listener; //keep it for later usage
super.setOnEditorActionListener(listener);
}
@Override
public boolean onKeyPreIme(final int keyCode, final KeyEvent event) {
if (event.getKeyCode() == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_UP) {
if (mEditorListener != null) {
//you can define and use custom listener,
//OR define custom R.id.<imeId>
//OR check event.keyCode in listener impl
//* I used editor action because of ButterKnife @
mEditorListener.onEditorAction(this, android.R.id.closeButton, event);
}
}
return super.onKeyPreIme(keyCode, event);
}
如何扩展它：
我认为，如前所述，重新计算屏幕高度不是100％成功。 要明确一点，重写＆＃39; onKeyPreIme＆＃39;不会以编程方式隐藏软键盘＆＃39;方法，但如果你在任何地方这样做，你应该做'onKeyboardHidden＆＃39;那里的逻辑并没有创建一个全面的解决方案。
答案 12 :(得分：1)
另一种方法是检查用户何时停止输入...
当TextEdit处于焦点（用户正在/正在键入）时，您可以隐藏视图（焦点侦听器）
并使用Handler + Runnable和文本更改侦听器来关闭键盘（无论其可见性如何）并在延迟一段时间后显示视图。
要注意的主要问题是您使用的延迟，这取决于这些TextEdits的内容。
Handler timeoutHandler = new Handler();
Runnable typingRunnable = new Runnable() {
public void run() {
// current TextEdit
View view = getCurrentFocus();
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
// reset focus
view.clearFocus();
// close keyboard (whether its open or not)
imm.hideSoftInputFromWindow(view.getWindowToken(), InputMethodManager.RESULT_UNCHANGED_SHOWN);
// SET VIEWS VISIBLE
}
};
editText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View v, boolean hasFocus) {
if (hasFocus) {
// SET VIEWS GONE
// reset handler
timeoutHandler.removeCallbacks(typingRunnable);
timeoutHandler.postDelayed(typingRunnable, TYPING_TIMEOUT);
}
}
});
editText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
// Reset Handler...
timeoutHandler.removeCallbacks(typingRunnable);
}
@Override
public void afterTextChanged(Editable s) {
// Reset Handler Cont.
if (editText.getText().toString().trim().length() > 0) {
timeoutHandler.postDelayed(typingRunnable, TYPING_TIMEOUT);
}
}
});
答案 13 :(得分：1)
您可以通过覆盖“活动”中的两种方法来处理键盘可见性：onKeyUp()和onKeyDown()，请参见以下链接：https://developer.android.com/training/keyboard-input/commands
答案 14 :(得分：0)
我使用 this answer 和我的任务 LoopingTask 构建了侦听器，顺便感谢。
使用 SoftKeyboardListener android 库中的 Viper Pack 非常容易实现。
只需安装库，然后将其添加到您的代码中：
Lava.app.addSoftKeyboardListener(context, new Lava.SoftKeyboardListener() {
@Override
public void onSoftKeyboardShow(EditText focusedview) {
// when shows
}
@Override
public void onSoftKeyboardHide(EditText focusedview) {
// when hides
}
});
Lava.app.removeSoftKeyboardListeners() 删除所有先前的侦听器。
免责声明 2：直接在活动 onCreate 中创建 SoftKeyboardListener 将在每次活动恢复时添加一个新的，因此请确保使用布尔值进行限制：
boolean isListenerAdded;
...
@Override
public void onCreate(Bundle sis) {
super.onCreate(sis);
...
if (!isListenerAdded) {
isListenerAdded = true;
// create your listener here
}
...
}
...
或者只是删除所有以前的：
...
@Override
public void onCreate(Bundle sis) {
super.onCreate(sis);
...
Lava.app.removeSoftKeyboardListeners();
// create your listener here
...
}
...
Lava.app.removeSoftKeyboardListeners() 删除所有以前的 SoftKeyboardListeners。
答案 15 :(得分：0)
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:card_view="http://schemas.android.com/tools"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/addresses_confirm_root_view"
android:orientation="vertical">
<---在xml根目录中使用id--->
final LinearLayout activityRootView = view.findViewById(R.id.addresses_confirm_root_view); activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() { @覆盖 公共无效 onGlobalLayout() { 矩形 r = 新矩形（）； //r 将填充您的视图坐标，该区域仍然可见。 activityRootView.getWindowVisibleDisplayFrame(r);
int heightDiff = activityRootView.getRootView().getHeight() - r.height();
if (heightDiff > 0.25 * activityRootView.getRootView().getHeight()) {
// if more than 25% of the screen, its probably a keyboard...
onkeyboard();
} else {
//Keyboard not visible
offkeyboard();
}
}
});
答案 16 :(得分：0)
检查我的 Kotlin 扩展 View.keyboardVisibilityChanges()：
fun View.keyboardVisibilityChanges(): Flow<Boolean>{
return onPreDrawFlow()
.map { isKeyboardVisible() }
.distinctUntilChanged()
}
fun View.onPreDrawFlow(): Flow<Unit> {
return callbackFlow {
val onPreDrawListener = ViewTreeObserver.OnPreDrawListener {
trySendBlocking(Unit)
true
}
viewTreeObserver.addOnPreDrawListener(onPreDrawListener)
awaitClose {
viewTreeObserver.removeOnPreDrawListener(onPreDrawListener)
}
}
}
fun View.isKeyboardVisible(): Boolean = ViewCompat.getRootWindowInsets(this)
?.isVisible(Type.ime())
?: false
答案 17 :(得分：0)
首先创建一个kotlin文件并添加以下方法：
fun Activity.getRootView(): View {
return findViewById<View>(android.R.id.content)
}
fun Context.convertDpToPx(dp: Float): Float {
return TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_DIP,
dp,
this.resources.displayMetrics
)
}
fun Activity.isKeyboardOpen(): Boolean {
val visibleBounds = Rect()
this.getRootView().getWindowVisibleDisplayFrame(visibleBounds)
val heightDiff = getRootView().height - visibleBounds.height()
val marginOfError = Math.round(this.convertDpToPx(50F))
return heightDiff > marginOfError
}
fun Activity.isKeyboardClosed(): Boolean {
return !this.isKeyboardOpen()
}
然后创建一个侦听器类以检查键盘是否打开：
class KeyboardEventListener(
private val activity: AppCompatActivity,
private val callback: (isOpen: Boolean) -> Unit
) : LifecycleObserver {
private val listener = object : ViewTreeObserver.OnGlobalLayoutListener {
private var lastState: Boolean = activity.isKeyboardOpen()
override fun onGlobalLayout() {
val isOpen = activity.isKeyboardOpen()
if (isOpen == lastState) {
return
} else {
dispatchKeyboardEvent(isOpen)
lastState = isOpen
}
}
}
init {
// Dispatch the current state of the keyboard
dispatchKeyboardEvent(activity.isKeyboardOpen())
// Make the component lifecycle aware
activity.lifecycle.addObserver(this)
registerKeyboardListener()
}
private fun registerKeyboardListener() {
activity.getRootView().viewTreeObserver.addOnGlobalLayoutListener(listener)
}
private fun dispatchKeyboardEvent(isOpen: Boolean) {
when {
isOpen -> callback(true)
!isOpen -> callback(false)
}
}
@OnLifecycleEvent(value = Lifecycle.Event.ON_PAUSE)
@CallSuper
fun onLifecyclePause() {
unregisterKeyboardListener()
}
private fun unregisterKeyboardListener() {
activity.getRootView().viewTreeObserver.removeOnGlobalLayoutListener(listener)
}
}
并像这样使用它：
override fun onResume() {
super.onResume()
KeyboardEventListener(this) { isOpen -> // handle event }
}
我希望您觉得它有用。
答案 18 :(得分：0)
找到了一种准确的方法来判断在使用'adjustResize'软输入模式（科特林代码）时键盘是否有效
定义几个活动范围变量
private var activityHeight = 0
private var keyboardOpen = false
在onCreate中编写以下代码
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
...
/* Grab initial screen value */
this@ActivityMain.window.decorView.doOnNextLayout {
val displayFrame : Rect = Rect()
this@ActivityMain.window.decorView.getWindowVisibleDisplayFrame(displayFrame)
activityHeight = displayFrame.height()
}
/* Check for keyboard open/close */
this@ActivityMain.window.decorView.addOnLayoutChangeListener { v, left, top, right, bottom, oldLeft, oldTop, oldRight, oldBottom ->
val drawFrame : Rect = Rect()
this@ActivityMain.window.decorView.getWindowVisibleDisplayFrame(drawFrame)
val currentSize = drawFrame.height()
keyboardOpen = currentSize < activityHeight
Log.v("keyboard1","$keyboardOpen $currentSize - $activityHeight")
}
}
您现在有了一个布尔值，它可以准确地跟踪键盘是否处于打开状态，并按照您的意愿进行操作
答案 19 :(得分：0)
有一个键盘被关闭的监听器。
类SearchEditText源自android.widget.EditText类。此类中有一个接口SearchEditText.OnKeyboardDismissListener。
你可以看一下文档化：
https://developer.android.com/reference/androidx/leanback/widget/SearchEditText
注意。 使用SearchEditText之前，您需要在build.gradle（：app）中设置Gradle依赖项：
implementation 'androidx.leanback:leanback:1.1.0-alpha05'
也许有人会派上用场。
详细回复：
import androidx.appcompat.app.AppCompatActivity;
import androidx.leanback.widget.SearchEditText;
import android.os.Bundle;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity
implements SearchEditText.OnKeyboardDismissListener {
SearchEditText searchEditText;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
searchEditText = findViewById(R.id.search_edit_text);
searchEditText.setOnKeyboardDismissListener(this);
}
/**
* Method invoked when the keyboard is dismissed.
*/
@Override
public void onKeyboardDismiss() {
Toast.makeText(this, "The listener worked", Toast.LENGTH_LONG).show();
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<androidx.leanback.widget.SearchEditText
android:id="@+id/search_edit_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="12dp"
android:textSize="20sp"
android:focusableInTouchMode="true"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
注意：侦听器适用于：
android:windowSoftInputMode="adjustPan"
android:windowSoftInputMode="adjustResize"
答案 20 :(得分：0)
我来晚了，但是我发现那里有一个非常方便的依赖项。使用它，您可以检查键盘的可见性，并可以通过单行代码使键盘“隐藏”并在需要时显示。
implementation 'net.yslibrary.keyboardvisibilityevent:keyboardvisibilityevent:3.0.0-RC2'
然后您只需使用此代码段来检查键盘的可见性。
KeyboardVisibilityEvent.setEventListener(this, new KeyboardVisibilityEventListener() {
@Override
public void onVisibilityChanged(boolean isOpen) {
if (isOpen)
Toast.makeText(MainActivity.this, "keyboard opened",Toast.LENGTH_SHORT).show();
else
Toast.makeText(MainActivity.this, "keyboard hidden", Toast.LENGTH_SHORT).show();
}
});
然后，如果您想在任何时间隐藏/显示键盘，则只需编写这些单行之一即可实现。
UIUtil.showKeyboard(this,edittext_to_be_focused);
UIUtil.hideKeyboard(this);
答案 21 :(得分：0)
检查以下代码：
XML代码：
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/coordinatorParent"
style="@style/parentLayoutPaddingStyle"
android:layout_width="match_parent"
android:layout_height="match_parent">
.................
</android.support.constraint.ConstraintLayout>
JAVA代码：
//Global Variable
android.support.constraint.ConstraintLayout activityRootView;
boolean isKeyboardShowing = false;
private ViewTreeObserver.OnGlobalLayoutListener onGlobalLayoutListener;
android.support.constraint.ConstraintLayout.LayoutParams layoutParams;
//onCreate or onViewAttached
activityRootView = view.findViewById(R.id.coordinatorParent);
onGlobalLayoutListener = onGlobalLayoutListener();
activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(onGlobalLayoutListener);
//outside oncreate
ViewTreeObserver.OnGlobalLayoutListener onGlobalLayoutListener() {
return new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
Rect r = new Rect();
activityRootView.getWindowVisibleDisplayFrame(r);
int screenHeight = activityRootView.getRootView().getHeight();
int keypadHeight = screenHeight - r.bottom;
if (keypadHeight > screenHeight * 0.15) { // 0.15 ratio is perhaps enough to determine keypad height.
if (!isKeyboardShowing) { // keyboard is opened
isKeyboardShowing = true;
onKeyboardVisibilityChanged(true);
}
}
else {
if (isKeyboardShowing) { // keyboard is closed
isKeyboardShowing = false;
onKeyboardVisibilityChanged(false);
}
}
}//ends here
};
}
void onKeyboardVisibilityChanged(boolean value) {
layoutParams = (android.support.constraint.ConstraintLayout.LayoutParams)topImg.getLayoutParams();
if(value){
int length = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 90, getResources().getDisplayMetrics());
layoutParams.height= length;
layoutParams.width = length;
topImg.setLayoutParams(layoutParams);
Log.i("keyboard " ,""+ value);
}else{
int length1 = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 175, getResources().getDisplayMetrics());
layoutParams.height= length1;
layoutParams.width = length1;
topImg.setLayoutParams(layoutParams);
Log.i("keyboard " ,""+ value);
}
}
@Override
public void onDetach() {
super.onDetach();
if(onGlobalLayoutListener != null) {
activityRootView.getViewTreeObserver().removeOnGlobalLayoutListener(onGlobalLayoutListener);
}
}
答案 22 :(得分：0)
这无法正常工作...
...已经看到许多使用尺寸计算来检查...
我想确定它是否打开，然后I found isAcceptingText()
所以这真的不能回答问题，因为它没有解决打开或关闭，而更像是打开或关闭，因此它是相关代码，可以在各种情况下帮助其他人...
活动
if (((InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE)).isAcceptingText()) {
Log.d(TAG,"Software Keyboard was shown");
} else {
Log.d(TAG,"Software Keyboard was not shown");
}
在一个片段中
if (((InputMethodManager) getActivity().getSystemService(Context.INPUT_METHOD_SERVICE)).isAcceptingText()) {
Log.d(TAG,"Software Keyboard was shown");
} else {
Log.d(TAG,"Software Keyboard was not shown");
}
答案 23 :(得分：0)
这将无需更改您的活动android:windowSoftInputMode
第1步：扩展EditText类并覆盖这两个：
@Override
public void setOnEditorActionListener(final OnEditorActionListener listener) {
mEditorListener = listener;
super.setOnEditorActionListener(listener);
}
@Override
public boolean onKeyPreIme(final int keyCode, final KeyEvent event) {
if (event.getKeyCode() == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_UP) {
if (mEditorListener != null) {
mEditorListener.onEditorAction(this, android.R.id.closeButton, event);
}
}
return super.onKeyPreIme(keyCode, event);
}
第2步：在您的活动中创建这两个：
private void initKeyboard() {
final AppEditText editText = findViewById(R.id.some_id);
editText.setOnFocusChangeListener(new OnFocusChangeListener() {
@Override
public void onFocusChange(View v, boolean hasFocus) {
setKeyboard(hasFocus);
}
});
editText.setOnEditorActionListener(new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
if (event == null || event.getKeyCode() == KeyEvent.KEYCODE_BACK) {
editText.clearFocus();
}
return false;
}
});
}
public void setKeyboard(boolean isShowing) {
// do something
}
***请记住，为了使clearFocus正常工作，您必须使父级层次结构中的父级或第一个子级成为可聚焦的。
setFocusableInTouchMode(true);
setFocusable(true);
答案 24 :(得分：0)
此代码非常好用
将此类用于根视图：
public class KeyboardConstraintLayout extends ConstraintLayout {
private KeyboardListener keyboardListener;
private EditText targetEditText;
private int minKeyboardHeight;
private boolean isShow;
public KeyboardConstraintLayout(Context context) {
super(context);
minKeyboardHeight = getResources().getDimensionPixelSize(R.dimen.keyboard_min_height); //128dp
}
public KeyboardConstraintLayout(Context context, AttributeSet attrs) {
super(context, attrs);
minKeyboardHeight = getResources().getDimensionPixelSize(R.dimen.keyboard_min_height); // 128dp
}
public KeyboardConstraintLayout(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
minKeyboardHeight = getResources().getDimensionPixelSize(R.dimen.keyboard_min_height); // 128dp
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
if (!isInEditMode()) {
Activity activity = (Activity) getContext();
@SuppressLint("DrawAllocation")
Rect rect = new Rect();
getWindowVisibleDisplayFrame(rect);
int statusBarHeight = rect.top;
int keyboardHeight = activity.getWindowManager().getDefaultDisplay().getHeight() - (rect.bottom - rect.top) - statusBarHeight;
if (keyboardListener != null && targetEditText != null && targetEditText.isFocused()) {
if (keyboardHeight > minKeyboardHeight) {
if (!isShow) {
isShow = true;
keyboardListener.onKeyboardVisibility(true);
}
}else {
if (isShow) {
isShow = false;
keyboardListener.onKeyboardVisibility(false);
}
}
}
}
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
public boolean isShowKeyboard() {
return isShow;
}
public void setKeyboardListener(EditText targetEditText, KeyboardListener keyboardListener) {
this.targetEditText = targetEditText;
this.keyboardListener = keyboardListener;
}
public interface KeyboardListener {
void onKeyboardVisibility (boolean isVisible);
}
}
并在活动或片段中设置键盘侦听器：
rootLayout.setKeyboardListener(targetEditText, new KeyboardConstraintLayout.KeyboardListener() {
@Override
public void onKeyboardVisibility(boolean isVisible) {
}
});
答案 25 :(得分：0)
＆＃34; Jaap van Hengstum＆＃34;的答案对我有用，但没有必要设置＆＃34; android：windowSoftInputMode＆＃34;正如他刚才所说的那样！
我把它缩小了（它现在只是检测我想要的东西，实际上是显示和隐藏键盘的事件）：
private ViewTreeObserver.OnGlobalLayoutListener keyboardLayoutListener = new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
int heightDiff = rootLayout.getRootView().getHeight() - rootLayout.getHeight();
int contentViewTop = getWindow().findViewById(Window.ID_ANDROID_CONTENT).getTop();
if(heightDiff <= contentViewTop){
onHideKeyboard();
} else {
onShowKeyboard();
}
}
};
private boolean keyboardListenersAttached = false;
private ViewGroup rootLayout;
protected void onShowKeyboard() {}
protected void onHideKeyboard() {}
protected void attachKeyboardListeners() {
if (keyboardListenersAttached) {
return;
}
rootLayout = (ViewGroup) findViewById(R.id.CommentsActivity);
rootLayout.getViewTreeObserver().addOnGlobalLayoutListener(keyboardLayoutListener);
keyboardListenersAttached = true;
}
@Override
protected void onDestroy() {
super.onDestroy();
if (keyboardListenersAttached) {
rootLayout.getViewTreeObserver().removeGlobalOnLayoutListener(keyboardLayoutListener);
}
}
并且不要忘记添加此
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_comments);
attachKeyboardListeners();}
答案 26 :(得分：0)
private boolean isKeyboardShown = false;
private int prevContentHeight = 0;
private ViewGroup contentLayout;
private ViewTreeObserver.OnGlobalLayoutListener keyboardLayoutListener =
new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
int contentHeight = contentLayout.getHeight();
int rootViewHeight = contentLayout.getRootView().getHeight();
if (contentHeight > 0) {
if (!isKeyboardShown) {
if (contentHeight < prevContentHeight) {
isKeyboardShown = true;
onShowKeyboard(rootViewHeight - contentHeight);
}
} else {
if (contentHeight > prevContentHeight) {
isKeyboardShown = false;
onHideKeyboard();
}
}
prevContentHeight = contentHeight;
}
}
};
我已经修改了Jaap接受的答案。但在我的情况下，很少有假设，如android:windowSoftInputMode=adjustResize，键盘在应用程序启动时不会显示在开头。而且，我认为屏幕方面符合父母的身高。
contentHeight > 0此检查让我知道相关屏幕是隐藏还是显示为应用此特定屏幕的键盘事件监听。我还在我的主要活动的attachKeyboardListeners(<your layout view here>)方法中传递onCreate()中关于屏幕的布局视图。每当相关屏幕的高度发生变化时，我将其保存到prevContentHeight变量，以便稍后检查键盘是显示还是隐藏。
对我而言，到目前为止，它的表现相当不错。我希望它也适用于其他人。
答案 27 :(得分：0)
rootLayout.getHeight() < rootLayout.getRootView().getHeight() - getStatusBarHeight()
是真的，否则隐藏
答案 28 :(得分：0)
不幸的是，我没有足够的声誉对Jaap van Hengstum的答案发表评论。但我读了一些人的评论，问题是contentViewTop始终是0，而onShowKeyboard(...)总是被调用。
我遇到了同样的问题，并找出了我遇到的问题。我使用的是AppCompatActivity而不是“普通”Activity。在这种情况下，Window.ID_ANDROID_CONTENT引用ContentFrameLayout，而不引用具有正确顶值的FrameLayout。在我的情况下，使用“普通”Activity是好的，如果你必须使用另一个活动类型（我刚刚测试了AppCompatActivity，也许这也是其他acitivy类型的问题，如FragmentActivity），您必须访问FrameLayout，这是ContentFrameLayout的祖先。
答案 29 :(得分：0)
public class MainActivity extends BaseActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mainactivity);
attachKeyboardListeners();
....
yourEditText1.setOnFocusChangeListener(new OnFocusChangeListener() {
@Override
public void onFocusChange(View v, boolean hasFocus) {
if (hasFocus) {
yourEditText2.setVisibility(View.GONE);
yourEditText3.setVisibility(View.GONE);
yourEditText4.setVisibility(View.GONE);
yourEditText5.setVisibility(View.GONE);
} else {
yourEditText2.setVisibility(View.VISIBLE);
yourEditText3.setVisibility(View.VISIBLE);
yourEditText4.setVisibility(View.VISIBLE);
yourEditText5.setVisibility(VISIBLE);
}
}
});
}
}
答案 30 :(得分：-1)
在 Activity\Fragment 中具有额外属性的解决方案，但没有任何假设的硬编码高度（如 100 等）。 只需将 OnGlobalLayoutListener 添加到您的根视图并在显示键盘之前保存其初始高度：
store = {0x1:RemoteSlaveContext(client),0x2:RemoteSlaveContext(client)}
context = ModbusServerContext(slaves=store, single=False)