Android系统中是否有一种方法可以检测软件(也就是Android。“软”)键盘在屏幕上可见吗?
当前回答
@iWantScala的回答很棒,但不适合我 rootView.getRootView().getHeight()总是有相同的值
一种方法是定义两个变量
private int maxRootViewHeight = 0;
private int currentRootViewHeight = 0;
添加全局监听器
rootView.getViewTreeObserver()
.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
currentRootViewHeight = rootView.getHeight();
if (currentRootViewHeight > maxRootViewHeight) {
maxRootViewHeight = currentRootViewHeight;
}
}
});
然后检查
if (currentRootViewHeight >= maxRootViewHeight) {
// Keyboard is hidden
} else {
// Keyboard is shown
}
工作正常
其他回答
你可以在androidx上使用WindowInsetsCompat。Core(版本1.5.0-rc01)。 此代码将从API 21及以上版本工作。Kotlin代码示例:
ViewCompat.setOnApplyWindowInsetsListener(root) { v, insets ->
val isKeyboardVisible = insets.isVisible(WindowInsetsCompat.Type.ime())
if (isKeyboardVisible) {
}
}
root是Activity的根视图。
更新
今天我正在寻找如何检测键盘可见性。起初,这个代码不起作用。所以我不得不:
添加android:windowSoftInputMode=" adjuststresize "到我的AndroidManifest.xml文件:
xml
<activity android:name="com.soumicslabs.activitykt.StartActivity"
android:theme="@style/AccountKitTheme.Default"
android:configChanges="orientation|screenSize"
android:screenOrientation="portrait"
android:windowSoftInputMode="adjustResize"
/>
在您的活动中,设置WindowCompat。setDecorFitsSystemWindows(window, false),这告诉android我们想手动处理的东西/不想使用系统默认值:
val window = this.window
WindowCompat.setDecorFitsSystemWindows(window, false) // <-- this tells android not to use system defaults, so we have to setup quite a lot of behaviors manually
最后,设置你的onApplyWindowInsetsListener:
val callBack = OnApplyWindowInsetsListener { view, insets ->
val imeHeight = insets?.getInsets(WindowInsetsCompat.Type.ime())?.bottom?:0
Log.e("tag", "onKeyboardOpenOrClose imeHeight = $imeHeight")
// todo: logic
val isKeyboardVisible = insets.isVisible(WindowInsetsCompat.Type.ime())
if (isKeyboardVisible) {
// do something
}else{
// do something else
}
insets?: WindowInsetsCompat(null)
}
ViewCompat.setOnApplyWindowInsetsListener(mainContainer, callBack)
这对我很管用。
我也遇到过类似的问题。我需要对屏幕上的Enter按钮做出反应(这隐藏了键盘)。在这种情况下,你可以订阅键盘打开的文本视图的OnEditorAction -如果你有多个可编辑框,那么就订阅所有的文本视图。
在你的活动中,你可以完全控制键盘,所以如果你监听所有打开和关闭事件,你就不会面临键盘是否打开的问题。
A可能会使用:
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
Log.d(
getClass().getSimpleName(),
String.format("conf: %s", newConfig));
if (newConfig.hardKeyboardHidden != hardKeyboardHidden) {
onHardwareKeyboardChange(newConfig.hardKeyboardHidden);
hardKeyboardHidden = newConfig.hardKeyboardHidden;
}
if (newConfig.keyboardHidden != keyboardHidden) {
onKeyboardChange(newConfig.keyboardHidden);
keyboardHidden = newConfig.hardKeyboardHidden;
}
}
public static final int KEYBOARDHIDDEN_UNDEFINED = 0;
public static final int KEYBOARDHIDDEN_NO = 1;
public static final int KEYBOARDHIDDEN_YES = 2;
public static final int KEYBOARDHIDDEN_SOFT = 3;
//todo
private void onKeyboardChange(int keyboardHidden) {
}
//todo
private void onHardwareKeyboardChange(int hardKeyboardHidden) {
}
我创建了一个可以用于此目的的简单类:https://github.com/ravindu1024/android-keyboardlistener。只需将其复制到您的项目中,并按如下方式使用:
KeyboardUtils.addKeyboardToggleListener(this, new KeyboardUtils.SoftKeyboardToggleListener()
{
@Override
public void onToggleSoftKeyboard(boolean isVisible)
{
Log.d("keyboard", "keyboard visible: "+isVisible);
}
});
这对我很有用。也许这对于所有版本来说都是最好的方法。
这将是有效的,使键盘可见性的属性,并观察这个变化延迟,因为onGlobalLayout方法调用多次。此外,检查设备旋转和windowSoftInputMode是否为adjustNothing也很好。
boolean isKeyboardShowing = false;
void onKeyboardVisibilityChanged(boolean opened) {
print("keyboard " + opened);
}
// ContentView is the root view of the layout of this activity/fragment
contentView.getViewTreeObserver().addOnGlobalLayoutListener(
new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
Rect r = new Rect();
contentView.getWindowVisibleDisplayFrame(r);
int screenHeight = contentView.getRootView().getHeight();
// r.bottom is the position above soft keypad or device button.
// if keypad is shown, the r.bottom is smaller than that before.
int keypadHeight = screenHeight - r.bottom;
Log.d(TAG, "keypadHeight = " + keypadHeight);
if (keypadHeight > screenHeight * 0.15) { // 0.15 ratio is perhaps enough to determine keypad height.
// keyboard is opened
if (!isKeyboardShowing) {
isKeyboardShowing = true
onKeyboardVisibilityChanged(true)
}
}
else {
// keyboard is closed
if (isKeyboardShowing) {
isKeyboardShowing = false
onKeyboardVisibilityChanged(false)
}
}
}
});
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