我需要做一件非常简单的事情-找出软件键盘是否显示。这在Android中可行吗?
当前回答
医生说… https://developer.android.com/reference/androidx/core/view/WindowInsetsCompat
检查放行说明.. https://developer.android.com/jetpack/androidx/releases/core#1.5.0-alpha02
要获得当前键盘可见性,可以使用getRootWindowInsets,然后调用isVisible()函数,传入IME类型。
val windowinsetscompat = ViewCompat.getRootWindowInsets(view)
val imeVisible = windowinsetscompat.isVisible(Type.ime())
也有监听OnApplyWindowInsetsListener的变化
ViewCompat.setOnApplyWindowInsetsListener(view) { v, insets ->
val imeVisible = insets.isVisible(Type.ime())
}
其他回答
不要编写任何硬代码。最好的方法是,你必须调整你的视图,而Get Focus on EditText与键盘显示。 您可以使用下面的代码将活动上的resize属性添加到清单文件中。
android: windowSoftInputMode = adjustResize”
希望这能帮助到大家。
Reuben Scratton给出的新答案非常棒,而且非常有效,但它只在你将windowSoftInputMode设置为adjuststresize时才有效。如果你将它设置为adjustPan,使用他的代码片段仍然无法检测键盘是否可见。为了解决这个问题,我对上面的代码做了微小的修改。
final View activityRootView = findViewById(R.id.activityRoot);
activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
Rect r = new Rect();
//r will be populated with the coordinates of your view that area still visible.
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...
... do something here
}
}
});
InputMethodManager有关于软键盘的信息。你从一个活动中获得它:
((InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE))
你可以摆弄一下,看看它能告诉你什么。你可以用它来显示或隐藏软输入…
这个想法是,如果你需要隐藏你的键盘,同时检查软输入状态,使用以下解决方案:
public boolean hideSoftInput() {
InputMethodManager imm = (InputMethodManager) getSystemService(Activity.INPUT_METHOD_SERVICE);
return imm.hideSoftInputFromWindow(mViewPager.getWindowToken(), 0);
}
如果在隐藏之前显示键盘,则此方法返回true。
这段代码工作得很好
根视图使用这个类:
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);
}
public KeyboardConstraintLayout(Context context, AttributeSet attrs) {
super(context, attrs);
minKeyboardHeight = getResources().getDimensionPixelSize(R.dimen.keyboard_min_height);
}
public KeyboardConstraintLayout(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
minKeyboardHeight = getResources().getDimensionPixelSize(R.dimen.keyboard_min_height);
}
@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);
}
}
在activity或fragment中设置键盘监听器:
rootLayout.setKeyboardListener(targetEditText, new KeyboardConstraintLayout.KeyboardListener() {
@Override
public void onKeyboardVisibility(boolean isVisible) {
}
});
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