Android官方本身没有提供一共好的方法来对软键盘进行监听，但我们实际应用时，很多地方都需要针对软键盘来对UI进行一些优化。
public class SoftKeyboardUtil {
public static void observeSoftKeyboard(Activity activity, final OnSoftKeyboardChangeListener listener) {
final View decorView = activity.getWindow().getDecorView();
decorView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
int previousKeyboardHeight = -1;
@Override
public void onGlobalLayout() {
Rect rect = new Rect();
decorView.getWindowVisibleDisplayFrame(rect);
int displayHeight = rect.bottom - rect.top;
int height = decorView.getHeight();
int keyboardHeight = height - displayHeight;
if (previousKeyboardHeight != keyboardHeight) {
boolean hide = (double) displayHeight / height > 0.8;
listener.onSoftKeyBoardChange(keyboardHeight, !hide);
}
previousKeyboardHeight = height;
}
});
}
public interface OnSoftKeyboardChangeListener {
void onSoftKeyBoardChange(int softKeybardHeight, boolean visible);
}
}
