android re view,recelerview 的使用

1.在recelerView 和 scrollview 一起使用的时候 recelerView 显示不全  需要自定义一些东西

public class FullyLinearLayoutManager extends LinearLayoutManager {

private static final String TAG = FullyLinearLayoutManager.class.getSimpleName();

public FullyLinearLayoutManager(Context context) {

super(context);

}

public FullyLinearLayoutManager(Context context, int orientation, boolean reverseLayout) {

super(context, orientation, reverseLayout);

}

private int[] mMeasuredDimension = new int[2];

@Override

public void onMeasure(RecyclerView.Recycler recycler, RecyclerView.State state,

int widthSpec, int heightSpec) {

final int widthMode = View.MeasureSpec.getMode(widthSpec);

final int heightMode = View.MeasureSpec.getMode(heightSpec);

final int widthSize = View.MeasureSpec.getSize(widthSpec);

final int heightSize = View.MeasureSpec.getSize(heightSpec);

Log.i(TAG, "onMeasure called. \nwidthMode " + widthMode

+ " \nheightMode " + heightSpec

+ " \nwidthSize " + widthSize

+ " \nheightSize " + heightSize

+ " \ngetItemCount() " + getItemCount());

int width = 0;

int height = 0;

for (int i = 0; i < getItemCount(); i++) {

measureScrapChild(recycler, i,

View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED),

View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED),

mMeasuredDimension);

if (getOrientation() == HORIZONTAL) {

width = width + mMeasuredDimension[0];

if (i == 0) {

height = mMeasuredDimension[1];

}

} else {

height = height + mMeasuredDimension[1];

if (i == 0) {

width = mMeasuredDimension[0];

}

}

}

switch (widthMode) {

case View.MeasureSpec.EXACTLY:

width = widthSize;

case View.MeasureSpec.AT_MOST:

case View.MeasureSpec.UNSPECIFIED:

}

switch (heightMode) {

case View.MeasureSpec.EXACTLY:

height = heightSize;

case View.MeasureSpec.AT_MOST:

case View.MeasureSpec.UNSPECIFIED:

}

setMeasuredDimension(width, height);

}

private void measureScrapChild(RecyclerView.Recycler recycler, int position, int widthSpec,

int heightSpec, int[] measuredDimension) {

try {

View view = recycler.getViewForPosition(0);//fix 动态添加时报IndexOutOfBoundsException

if (view != null) {

RecyclerView.LayoutParams p = (RecyclerView.LayoutParams) view.getLayoutParams();

int childWidthSpec = ViewGroup.getChildMeasureSpec(widthSpec,

getPaddingLeft() + getPaddingRight(), p.width);

int childHeightSpec = ViewGroup.getChildMeasureSpec(heightSpec,

getPaddingTop() + getPaddingBottom(), p.height);

view.measure(childWidthSpec, childHeightSpec);

measuredDimension[0] = view.getMeasuredWidth() + p.leftMargin + p.rightMargin;

measuredDimension[1] = view.getMeasuredHeight() + p.bottomMargin + p.topMargin;

recycler.recycleView(view);

}

} catch (Exception e) {

e.printStackTrace();

} finally {

}

}

}

2.在 scrollview 的滑动问题

public class MyScrollview extends ScrollView {

private int downX;

private int downY;

private int mTouchSlop;

public MyScrollview(Context context) {

super(context);

mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();

}

public MyScrollview(Context context, AttributeSet attrs) {

super(context, attrs);

mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();

}

public MyScrollview(Context context, AttributeSet attrs, int defStyleAttr) {

super(context, attrs, defStyleAttr);

mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();

}

@Override

public boolean onInterceptTouchEvent(MotionEvent e) {

int action = e.getAction();

switch (action) {

case MotionEvent.ACTION_DOWN:

downX = (int) e.getRawX();

downY = (int) e.getRawY();

break;

case MotionEvent.ACTION_MOVE:

int moveY = (int) e.getRawY();

if (Math.abs(moveY - downY) > mTouchSlop) {

return true;

}

}

return super.onInterceptTouchEvent(e);

}

}