public class MyActivity extends AppCompatActivity {

/**
 * 当前界面中的软件盘的状态
 */
private boolean isKeyBoardOpen = false;

/**
 * 监听软键盘状态
 */
private void addOnSoftKeyBoardVisibleListener() {
    final View decorView = getWindow().getDecorView();
    decorView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            Rect rect = new Rect();
            decorView.getWindowVisibleDisplayFrame(rect);
            isKeyBoardOpen = (double) (rect.bottom - rect.top) / decorView.getHeight() < 0.8;
        }
    });
}
}