需求：监听输入法的显示与隐藏
public class InputMethodStateRelativeLayout extends RelativeLayout {
private int initBottom = -1;
private int initLeft = -1;
private OnInputMethodChangedListener onInputMethodChangedListener;
public InputMethodStateRelativeLayout(Context context) {
super(context);
}
public InputMethodStateRelativeLayout(Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
super.onLayout(changed, l, t, r, b);
if (initBottom == -1 || initLeft == -1) {
initBottom = b;
initLeft = l;
return;
}
if (changed) {
int height = b - initBottom; //高度变化值（弹出输入法，布局变小，则为负值）
Logger.d("height:" + height);
if (null != onInputMethodChangedListener) {
if (height < 0) {
onInputMethodChangedListener.onShowInputMethodListener();
} else {
onInputMethodChangedListener.onHiddenInputMethodListener();
}
}
}
}
public void setOnInputMethodChangedListener(OnInputMethodChangedListener
onInputMethodChangedListener) {
this.onInputMethodChangedListener = onInputMethodChangedListener;
}
public interface OnInputMethodChangedListener {
void onShowInputMethodListener();
void onHiddenInputMethodListener();
}
}
