Android监听软键盘的显示和隐藏

使用步骤

1. xml 布局文件布局，和普通的控件一下
2. 获取SoftInputCanListenerEditText 实例，并设置监听器
3. Activity 注册的时候android:windowSoftInputMode 使用默认值，就是说不要写这个就对了

/**
 * author: vector.huang
 * date: 2016/10/12 19:07
 */
public class SoftInputCanListenerEditText extends AppCompatEditText {

    private OnSoftInputChangeListener mOnSoftInputChangeListener;
    private int mPreHeight; //上一次计算时的高度
    private View mContentView;
    private boolean isShow;

    public SoftInputCanListenerEditText(Context context) {
        super(context);
    }

    public SoftInputCanListenerEditText(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public SoftInputCanListenerEditText(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }


    public void setOnSoftInputChangeListener(OnSoftInputChangeListener onSoftInputChangeListener) {
        mOnSoftInputChangeListener = onSoftInputChangeListener;
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        if (isInEditMode()) {
            return;
        }
        if (mContentView == null) {
            Activity activity = (Activity) ((TintContextWrapper) getContext()).getBaseContext();
            mContentView = activity.findViewById(android.R.id.content);
        }

        int nowHeight = mContentView.getHeight();

        if (mPreHeight == 0) {
            //第一次进入
            mPreHeight = nowHeight;
            return;
        }

        if (mPreHeight == nowHeight) {
            //同样的不处理
            return;
        }

        if (mOnSoftInputChangeListener != null && nowHeight < mPreHeight) {
            //变小了之后就是显示了键盘
            mOnSoftInputChangeListener.onChange(true);
            isShow = true;
            //显示键盘之后就开始检查什么时候收起
            startCheck();
            mPreHeight = nowHeight;
        }

    }

    private Runnable check = () -> {
        int nowHeight = mContentView.getHeight();

        if (mOnSoftInputChangeListener != null && nowHeight > mPreHeight) {
            //变小了之后就是显示了键盘
            mOnSoftInputChangeListener.onChange(false);
            isShow = false;
            mPreHeight = nowHeight;
            return;
        }

        //键盘没有收起，接着检查
        startCheck();
    };

    //定时检查才行呀
    private void startCheck() {
        postDelayed(check, 100);
    }

    public boolean isShow() {
        return isShow;
    }

    public interface OnSoftInputChangeListener{
        void onChange(boolean isShow);
    }
}

感谢支持，更多请看把时间当初朋友