Android(安卓)软键盘的监听（监听高度，是否显示）

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。

以下是整理出来的一个不错的方法，大家可以使用。

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;@Overridepublic void onGlobalLayout() {Rect rect = new Rect();decorView.getWindowVisibleDisplayFrame(rect);int displayHeight = rect.bottom;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);}}

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