FAB在编辑文本点击时响应，FAB拿出键盘

Question

我正在使用 Google 的新设计支持库中的 FAB。我有一个长表格和一个 FAB 的屏幕。我希望 FAB 在软键盘打开时消失。找不到检测软键盘打开的方法。还有其他选择吗

我无法将侦听器设置为 EditText，因为它们都包含在不同的 Fragment 中，并且焦点更改侦听器在另一个 Fragment 中不可用。

我已经在 main Activity 中实现了 FAB，所以我无法为 EditText 焦点侦听器隐藏键盘侦听器，任何人都可以与我分享解决方案。

Answer 1

无法直接知道软键盘何时打开，但您可以执行以下操作：

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;

    if (keypadHeight > screenHeight * 0.15) {
        // keyboard is opened
        // Hide your FAB here
    }
    else {
        // keyboard is closed
    }
}
});

Answer 2

您可以监听键盘的打开和关闭。

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);
    }
}
}

这个问题中列出了更详细的示例：SoftKeyboard open and close listener in an activity in Android?

FAB在编辑文本点击时响应，FAB拿出键盘

FAB responded when edit text click, FAB comes up with keyboard

android

floating-action-button