我想根据是否显示虚拟键盘来改变布局。我搜索了API和各种博客，但似乎找不到任何有用的东西。
有可能吗？
谢谢！
答案 0 :(得分：73)
您必须自己处理配置更改。
http://developer.android.com/guide/topics/resources/runtime-changes.html#HandlingTheChange
样品：
// from the link above
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Checks whether a hardware keyboard is available
if (newConfig.hardKeyboardHidden == Configuration.HARDKEYBOARDHIDDEN_NO) {
Toast.makeText(this, "keyboard visible", Toast.LENGTH_SHORT).show();
} else if (newConfig.hardKeyboardHidden == Configuration.HARDKEYBOARDHIDDEN_YES) {
Toast.makeText(this, "keyboard hidden", Toast.LENGTH_SHORT).show();
}
}
然后只需更改某些视图的可见性，更新字段并更改布局文件。
此解决方案不适用于软键盘，并且不会为软键盘调用onConfigurationChanged。
答案 1 :(得分：54)
这可能不是最有效的解决方案。但是每次这对我都有用......我把这个函数称为我需要收听softKeyboard的地方。
boolean isOpened = false;
public void setListenerToRootView() {
final View activityRootView = getWindow().getDecorView().findViewById(android.R.id.content);
activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
int heightDiff = activityRootView.getRootView().getHeight() - activityRootView.getHeight();
if (heightDiff > 100) { // 99% of the time the height diff will be due to a keyboard.
Toast.makeText(getApplicationContext(), "Gotcha!!! softKeyboardup", 0).show();
if (isOpened == false) {
//Do two things, make the view top visible and the editText smaller
}
isOpened = true;
} else if (isOpened == true) {
Toast.makeText(getApplicationContext(), "softkeyborad Down!!!", 0).show();
isOpened = false;
}
}
});
}
注意： 如果用户使用浮动键盘，此方法将导致问题。
答案 2 :(得分：37)
如果要处理从Activity中显示/隐藏IMM（虚拟）键盘窗口，则需要对布局进行子类化并覆盖onMesure方法（以便您可以确定测量的宽度和布局的测量高度） ）。之后，通过setContentView（）将子类布局设置为Activity的主视图。现在，您将能够处理IMM显示/隐藏窗口事件。如果这听起来很复杂，那就不是真的了。这是代码：
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >
<EditText
android:id="@+id/SearchText"
android:text=""
android:inputType="text"
android:layout_width="fill_parent"
android:layout_height="34dip"
android:singleLine="True"
/>
<Button
android:id="@+id/Search"
android:layout_width="60dip"
android:layout_height="34dip"
android:gravity = "center"
/>
</LinearLayout>
现在在您的Activity声明布局的子类（main.xml）
public class MainSearchLayout extends LinearLayout {
public MainSearchLayout(Context context, AttributeSet attributeSet) {
super(context, attributeSet);
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
inflater.inflate(R.layout.main, this);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
Log.d("Search Layout", "Handling Keyboard Window shown");
final int proposedheight = MeasureSpec.getSize(heightMeasureSpec);
final int actualHeight = getHeight();
if (actualHeight > proposedheight){
// Keyboard is shown
} else {
// Keyboard is hidden
}
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
您可以从代码中看到我们为子类构造函数
中的Activity扩充布局inflater.inflate(R.layout.main, this);
现在只需为我们的Activity设置子类布局的内容视图。
public class MainActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
MainSearchLayout searchLayout = new MainSearchLayout(this, null);
setContentView(searchLayout);
}
// rest of the Activity code and subclassed layout...
}
答案 3 :(得分：23)
我是这样做的：
添加OnKeyboardVisibilityListener界面。
public interface OnKeyboardVisibilityListener {
void onVisibilityChanged(boolean visible);
}
<强> HomeActivity.java ：
public class HomeActivity extends Activity implements OnKeyboardVisibilityListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sign_up);
// Other stuff...
setKeyboardVisibilityListener(this);
}
private void setKeyboardVisibilityListener(final OnKeyboardVisibilityListener onKeyboardVisibilityListener) {
final View parentView = ((ViewGroup) findViewById(android.R.id.content)).getChildAt(0);
parentView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
private boolean alreadyOpen;
private final int defaultKeyboardHeightDP = 100;
private final int EstimatedKeyboardDP = defaultKeyboardHeightDP + (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP ? 48 : 0);
private final Rect rect = new Rect();
@Override
public void onGlobalLayout() {
int estimatedKeyboardHeight = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, EstimatedKeyboardDP, parentView.getResources().getDisplayMetrics());
parentView.getWindowVisibleDisplayFrame(rect);
int heightDiff = parentView.getRootView().getHeight() - (rect.bottom - rect.top);
boolean isShown = heightDiff >= estimatedKeyboardHeight;
if (isShown == alreadyOpen) {
Log.i("Keyboard state", "Ignoring global layout change...");
return;
}
alreadyOpen = isShown;
onKeyboardVisibilityListener.onVisibilityChanged(isShown);
}
});
}
@Override
public void onVisibilityChanged(boolean visible) {
Toast.makeText(HomeActivity.this, visible ? "Keyboard is active" : "Keyboard is Inactive", Toast.LENGTH_SHORT).show();
}
}
希望这会对你有所帮助。
答案 4 :(得分：22)
根据Nebojsa Tomcic的代码，我开发了以下RelativeLayout-Subclass：
import java.util.ArrayList;
import android.content.Context;
import android.util.AttributeSet;
import android.widget.RelativeLayout;
public class KeyboardDetectorRelativeLayout extends RelativeLayout {
public interface IKeyboardChanged {
void onKeyboardShown();
void onKeyboardHidden();
}
private ArrayList<IKeyboardChanged> keyboardListener = new ArrayList<IKeyboardChanged>();
public KeyboardDetectorRelativeLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public KeyboardDetectorRelativeLayout(Context context, AttributeSet attrs) {
super(context, attrs);
}
public KeyboardDetectorRelativeLayout(Context context) {
super(context);
}
public void addKeyboardStateChangedListener(IKeyboardChanged listener) {
keyboardListener.add(listener);
}
public void removeKeyboardStateChangedListener(IKeyboardChanged listener) {
keyboardListener.remove(listener);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
final int proposedheight = MeasureSpec.getSize(heightMeasureSpec);
final int actualHeight = getHeight();
if (actualHeight > proposedheight) {
notifyKeyboardShown();
} else if (actualHeight < proposedheight) {
notifyKeyboardHidden();
}
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
private void notifyKeyboardHidden() {
for (IKeyboardChanged listener : keyboardListener) {
listener.onKeyboardHidden();
}
}
private void notifyKeyboardShown() {
for (IKeyboardChanged listener : keyboardListener) {
listener.onKeyboardShown();
}
}
}
这很好用...... Mark，当您的Activity的Soft Input Mode设置为“WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE”时，此解决方案将正常工作
答案 5 :(得分：19)
与@ amalBit的答案一样，注册一个全局布局的侦听器并计算dectorView的可见底部及其底部的差异，如果差异大于某个值（猜测IME的高度），我们认为IME已经上升：
final EditText edit = (EditText) findViewById(R.id.edittext);
edit.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
if (keyboardShown(edit.getRootView())) {
Log.d("keyboard", "keyboard UP");
} else {
Log.d("keyboard", "keyboard Down");
}
}
});
private boolean keyboardShown(View rootView) {
final int softKeyboardHeight = 100;
Rect r = new Rect();
rootView.getWindowVisibleDisplayFrame(r);
DisplayMetrics dm = rootView.getResources().getDisplayMetrics();
int heightDiff = rootView.getBottom() - r.bottom;
return heightDiff > softKeyboardHeight * dm.density;
}
高度阈值100是IME的猜测最小高度。
这适用于adjustPan和adjustResize。
答案 6 :(得分：12)
Nebojsa的解决方案几乎对我有用。当我在多行EditText中单击时，它知道键盘已经显示，但是当我开始在EditText内部输入时，actualHeight和proposedHeight仍然是相同的，所以它不知道键盘仍然显示。我做了一些修改来存储最大高度，它工作正常。这是修订后的子类：
public class CheckinLayout extends RelativeLayout {
private int largestHeight;
public CheckinLayout(Context context, AttributeSet attributeSet) {
super(context, attributeSet);
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
inflater.inflate(R.layout.checkin, this);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
final int proposedheight = MeasureSpec.getSize(heightMeasureSpec);
largestHeight = Math.max(largestHeight, getHeight());
if (largestHeight > proposedheight)
// Keyboard is shown
else
// Keyboard is hidden
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
答案 7 :(得分：10)
我通过覆盖自定义EditText中的onKeyPreIme（int keyCode，KeyEvent事件）解决了这个问题。
@Override
public boolean onKeyPreIme(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_UP) {
//keyboard will be hidden
}
}
答案 8 :(得分：10)
不确定是否有人发布此内容。找到this solution simple to use!。 SoftKeyboard class is on gist.github.com。{{3}}。但是，当键盘弹出/隐藏事件回调时，我们需要一个处理程序来在UI上正确地执行操作：
/*
Somewhere else in your code
*/
RelativeLayout mainLayout = findViewById(R.layout.main_layout); // You must use your root layout
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
new Handler(Looper.getMainLooper()).post(new Runnable() {
@Override
public void run() {
// Code here will run in UI thread
...
}
});
}
@Override
public void onSoftKeyboardShow()
{
// Code here
new Handler(Looper.getMainLooper()).post(new Runnable() {
@Override
public void run() {
// Code here will run in UI thread
...
}
});
}
});
答案 9 :(得分：4)
我有点黑客这样做。虽然似乎没有办法检测软键盘何时显示或隐藏，但可以实际上检测到约何时显示或隐藏在您正在收听的OnFocusChangeListener上设置EditText。
EditText et = (EditText) findViewById(R.id.et);
et.setOnFocusChangeListener(new View.OnFocusChangeListener()
{
@Override
public void onFocusChange(View view, boolean hasFocus)
{
//hasFocus tells us whether soft keyboard is about to show
}
});
注意：有一点需要注意的是，当EditText获得或失去焦点时，会立即触发此回调。这实际上会在软键盘显示或隐藏之前触发。我发现在键盘显示或隐藏之后执行某些操作的最佳方法是使用Handler并延迟大约400毫秒，如下所示：
EditText et = (EditText) findViewById(R.id.et);
et.setOnFocusChangeListener(new View.OnFocusChangeListener()
{
@Override
public void onFocusChange(View view, boolean hasFocus)
{
new Handler().postDelayed(new Runnable()
{
@Override
public void run()
{
//do work here
}
}, 400);
}
});
答案 10 :(得分：3)
答案 11 :(得分：2)
您还可以检查第一个DecorView的子底部填充。显示键盘时，它将被设置为非零值。
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
View view = getRootView();
if (view != null && (view = ((ViewGroup) view).getChildAt(0)) != null) {
setKeyboardVisible(view.getPaddingBottom() > 0);
}
super.onLayout(changed, left, top, right, bottom);
}
答案 12 :(得分：2)
我已经解决了单行textview后编码的问题。
package com.helpingdoc;
import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.LinearLayout;
public class MainSearchLayout extends LinearLayout {
int hieght = 0;
public MainSearchLayout(Context context, AttributeSet attributeSet) {
super(context, attributeSet);
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
inflater.inflate(R.layout.main, this);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
Log.d("Search Layout", "Handling Keyboard Window shown");
if(getHeight()>hieght){
hieght = getHeight();
}
final int proposedheight = MeasureSpec.getSize(heightMeasureSpec);
final int actualHeight = getHeight();
System.out.println("....hieght = "+ hieght);
System.out.println("....actualhieght = "+ actualHeight);
System.out.println("....proposedheight = "+ proposedheight);
if (actualHeight > proposedheight){
// Keyboard is shown
} else if(actualHeight<proposedheight){
// Keyboard is hidden
}
if(proposedheight == hieght){
// Keyboard is hidden
}
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
答案 13 :(得分：1)
我所做的是创建简单的绑定以在键盘可见时隐藏视图。
解决方案基于 WindowInsetsCompat 的当前 AndroidX 实现，该实现仍处于测试阶段（androidx 核心 1.5） - source
private fun isKeyboardVisible(insets: WindowInsets): Boolean {
val insetsCompat = WindowInsetsCompat.toWindowInsetsCompat(insets)
val systemWindow = insetsCompat.systemWindowInsets
val rootStable = insetsCompat.stableInsets
if (systemWindow.bottom > rootStable.bottom) {
// This handles the adjustResize case on < API 30, since
// systemWindow.bottom is probably going to be the IME
return true
}
return false
}
@BindingAdapter("goneWhenKeyboardVisible")
fun View.goneWhenKeyboardVisible(enabled: Boolean) {
if (enabled) {
setOnApplyWindowInsetsListener { view, insets ->
visibility = if (isKeyboardVisible(insets)) GONE else VISIBLE
insets
}
} else {
setOnApplyWindowInsetsListener(null)
visibility = VISIBLE
}
}
用法：
<FrameLayout
android:id="@+id/bottom_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:goneWhenKeyboardVisible="@{true}"
/>
答案 14 :(得分：0)
隐藏|显示键盘事件可以通过OnGlobalLayoutListener中的简单黑客来监听：
final View activityRootView = findViewById(R.id.top_root);
activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
public void onGlobalLayout() {
int heightDiff = activityRootView.getRootView().getHeight() - activityRootView.getHeight();
if (heightDiff > 100) {
// keyboard is up
} else {
// keyboard is down
}
}
});
这里的activityRootView是你的Activity的根视图。
答案 15 :(得分：0)
使用 viewTreeObserver 轻松获取键盘事件。
layout_parent.viewTreeObserver.addOnGlobalLayoutListener {
val r = Rect()
layout_parent.getWindowVisibleDisplayFrame(r)
if (layout_parent.rootView.height - (r.bottom - r.top) > 100) { // if more than 100 pixels, its probably a keyboard...
Log.e("TAG:", "keyboard open")
} else {
Log.e("TAG:", "keyboard close")
}
}
** layout_parent 是您的视图，如edit_text.parent
答案 16 :(得分：0)
@Filipkowicz 的上述答案在 Android API < 30 中工作正常。从 Android API 30 开始，我们应该使用 setWindowInsetsAnimationCallback。因此，下面的答案结合了这两种方法以运行 API 21 - 30。
private fun isKeyboardVisible(insets: WindowInsets): Boolean {
val insetsCompat = WindowInsetsCompat.toWindowInsetsCompat(insets)
val systemWindow = insetsCompat.systemWindowInsets
val rootStable = insetsCompat.stableInsets
if (systemWindow.bottom > rootStable.bottom) {
// This handles the adjustResize case on < API 30, since
// systemWindow.bottom is probably going to be the IME
return true
}
return false
}
@JvmStatic
@BindingAdapter("goneWhenKeyboardVisible")
fun View.goneWhenKeyboardVisible() {
if (isRPlus()) {
setWindowInsetsAnimationCallback(object :
WindowInsetsAnimation.Callback(DISPATCH_MODE_STOP) {
override fun onProgress(
insets: WindowInsets,
runningAnimations: MutableList<WindowInsetsAnimation>
): WindowInsets {
return insets
}
override fun onStart(
animation: WindowInsetsAnimation,
bounds: WindowInsetsAnimation.Bounds
): WindowInsetsAnimation.Bounds {
if (isVisible)
isVisible = !rootWindowInsets.isVisible(WindowInsets.Type.ime())
return super.onStart(animation, bounds)
}
override fun onEnd(animation: WindowInsetsAnimation) {
super.onEnd(animation)
if (!isVisible)
isVisible = !rootWindowInsets.isVisible(WindowInsets.Type.ime())
}
})
} else {
setOnApplyWindowInsetsListener { _, insets ->
isVisible = !isKeyboardVisible(insets)
insets
}
}
}
答案 17 :(得分：0)
随着 androidx.core 1.5.0 的发布，这就是我在 android 11 之前的设备中监听键盘显示/隐藏事件的方法。
毕业：
implementation "androidx.core:core-ktx:1.5.0"
片段：
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
val view = activity?.window?.decorView ?: return
ViewCompat.setOnApplyWindowInsetsListener(view) { v, insets ->
val showingKeyboard = insets.isVisible(WindowInsetsCompat.Type.ime())
if(showingKeyboard){
//do something
}
insets
}
}
确保在视图销毁时删除侦听器以避免内存泄漏。此解决方案也仅在软件输入模式为 adjustResize 时有效，如果为 adjustPan，则 setOnApplyWindowInsetsListener 不会触发，如果有人对如何使其与 adjustPan 一起工作有想法，请分享。
请注意，根据文档，
* When running on devices with API Level 29 and before, the returned value is an
* approximation based on the information available. This is especially true for the {@link
* Type#ime IME} type, which currently only works when running on devices with SDK level 23
* and above.
*
insets.isVisible(ime) 仅适用于 SDK 级别高于 23 的设备
答案 18 :(得分：-2)
Nebojsa Tomcic的回答对我没有帮助。我的RelativeLayout内有TextView和AutoCompleteTextView。当键盘显示和隐藏时，我需要将TextView滚动到底部。为了实现这一点，我覆盖了onLayout方法，它对我来说很好。
public class ExtendedLayout extends RelativeLayout
{
public ExtendedLayout(Context context, AttributeSet attributeSet)
{
super(context, attributeSet);
LayoutInflater inflater = (LayoutInflater)
context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
inflater.inflate(R.layout.main, this);
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b)
{
super.onLayout(changed, l, t, r, b);
if (changed)
{
int scrollEnd = (textView.getLineCount() - textView.getHeight() /
textView.getLineHeight()) * textView.getLineHeight();
textView.scrollTo(0, scrollEnd);
}
}
}