来源: 互联网  发布时间: 2014-02-18

横向listview源码.

public class HorizontalListView extends AdapterView<ListAdapter> {

	public boolean mAlwaysOverrideTouch = true;
	protected ListAdapter mAdapter;
	private int mLeftViewIndex = -1;
	private int mRightViewIndex = 0;
	protected int mCurrentX;
	protected int mNextX;
	private int mMaxX = Integer.MAX_VALUE;
	private int mDisplayOffset = 0;
	protected Scroller mScroller;
	private GestureDetector mGesture;
	private Queue<View> mRemovedViewQueue = new LinkedList<View>();
	private OnItemSelectedListener mOnItemSelected;
	private OnItemClickListener mOnItemClicked;
	private OnItemLongClickListener mOnItemLongClicked;
	private boolean mDataChanged = false;
	

	public HorizontalListView(Context context, AttributeSet attrs) {
		super(context, attrs);
		initView();
	}
	
	private synchronized void initView() {
		mLeftViewIndex = -1;
		mRightViewIndex = 0;
		mDisplayOffset = 0;
		mCurrentX = 0;
		mNextX = 0;
		mMaxX = Integer.MAX_VALUE;
		mScroller = new Scroller(getContext());
		mGesture = new GestureDetector(getContext(), mOnGesture);
	}
	
	@Override
	public void setOnItemSelectedListener(AdapterView.OnItemSelectedListener listener) {
		mOnItemSelected = listener;
	}
	
	@Override
	public void setOnItemClickListener(AdapterView.OnItemClickListener listener){
		mOnItemClicked = listener;
	}
	
	@Override
	public void setOnItemLongClickListener(AdapterView.OnItemLongClickListener listener) {
		mOnItemLongClicked = listener;
	}

	private DataSetObserver mDataObserver = new DataSetObserver() {

		@Override
		public void onChanged() {
			synchronized(HorizontalListView.this){
				mDataChanged = true;
			}
			invalidate();
			requestLayout();
		}

		@Override
		public void onInvalidated() {
			reset();
			invalidate();
			requestLayout();
		}
		
	};

	@Override
	public ListAdapter getAdapter() {
		return mAdapter;
	}

	@Override
	public View getSelectedView() {
		//TODO: implement
		return null;
	}

	@Override
	public void setAdapter(ListAdapter adapter) {
		if(mAdapter != null) {
			mAdapter.unregisterDataSetObserver(mDataObserver);
		}
		mAdapter = adapter;
		mAdapter.registerDataSetObserver(mDataObserver);
		reset();
	}
	
	private synchronized void reset(){
		initView();
		removeAllViewsInLayout();
        requestLayout();
	}

	@Override
	public void setSelection(int position) {
		//TODO: implement
	}
	
	private void addAndMeasureChild(final View child, int viewPos) {
		LayoutParams params = child.getLayoutParams();
		if(params == null) {
			params = new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
		}

		addViewInLayout(child, viewPos, params, true);
		child.measure(MeasureSpec.makeMeasureSpec(getWidth(), MeasureSpec.AT_MOST),
				MeasureSpec.makeMeasureSpec(getHeight(), MeasureSpec.AT_MOST));
	}
	
	

	@Override
	protected synchronized void onLayout(boolean changed, int left, int top, int right, int bottom) {
		super.onLayout(changed, left, top, right, bottom);

		if(mAdapter == null){
			return;
		}
		
		if(mDataChanged){
			int oldCurrentX = mCurrentX;
			initView();
			removeAllViewsInLayout();
			mNextX = oldCurrentX;
			mDataChanged = false;
		}

		if(mScroller.computeScrollOffset()){
			int scrollx = mScroller.getCurrX();
			mNextX = scrollx;
		}
		
		if(mNextX <= 0){
			mNextX = 0;
			mScroller.forceFinished(true);
		}
		if(mNextX >= mMaxX) {
			mNextX = mMaxX;
			mScroller.forceFinished(true);
		}
		
		int dx = mCurrentX - mNextX;
		
		removeNonVisibleItems(dx);
		fillList(dx);
		positionItems(dx);
		
		mCurrentX = mNextX;
		
		if(!mScroller.isFinished()){
			post(new Runnable(){
				@Override
				public void run() {
					requestLayout();
				}
			});
			
		}
	}
	
	private void fillList(final int dx) {
		int edge = 0;
		View child = getChildAt(getChildCount()-1);
		if(child != null) {
			edge = child.getRight();
		}
		fillListRight(edge, dx);
		
		edge = 0;
		child = getChildAt(0);
		if(child != null) {
			edge = child.getLeft();
		}
		fillListLeft(edge, dx);
		
		
	}
	
	private void fillListRight(int rightEdge, final int dx) {
		while(rightEdge + dx < getWidth() && mRightViewIndex < mAdapter.getCount()) {
			
			View child = mAdapter.getView(mRightViewIndex, mRemovedViewQueue.poll(), this);
			addAndMeasureChild(child, -1);
			rightEdge += child.getMeasuredWidth();
			
			if(mRightViewIndex == mAdapter.getCount()-1) {
				mMaxX = mCurrentX + rightEdge - getWidth();
			}
			
			if (mMaxX < 0) {
				mMaxX = 0;
			}
			mRightViewIndex++;
		}
		
	}
	
	private void fillListLeft(int leftEdge, final int dx) {
		while(leftEdge + dx > 0 && mLeftViewIndex >= 0) {
			View child = mAdapter.getView(mLeftViewIndex, mRemovedViewQueue.poll(), this);
			addAndMeasureChild(child, 0);
			leftEdge -= child.getMeasuredWidth();
			mLeftViewIndex--;
			mDisplayOffset -= child.getMeasuredWidth();
		}
	}
	
	private void removeNonVisibleItems(final int dx) {
		View child = getChildAt(0);
		while(child != null && child.getRight() + dx <= 0) {
			mDisplayOffset += child.getMeasuredWidth();
			mRemovedViewQueue.offer(child);
			removeViewInLayout(child);
			mLeftViewIndex++;
			child = getChildAt(0);
			
		}
		
		child = getChildAt(getChildCount()-1);
		while(child != null && child.getLeft() + dx >= getWidth()) {
			mRemovedViewQueue.offer(child);
			removeViewInLayout(child);
			mRightViewIndex--;
			child = getChildAt(getChildCount()-1);
		}
	}
	
	private void positionItems(final int dx) {
		if(getChildCount() > 0){
			mDisplayOffset += dx;
			int left = mDisplayOffset;
			for(int i=0;i<getChildCount();i++){
				View child = getChildAt(i);
				int childWidth = child.getMeasuredWidth();
				child.layout(left, 0, left + childWidth, child.getMeasuredHeight());
				left += childWidth + child.getPaddingRight();
			}
		}
	}
	
	public synchronized void scrollTo(int x) {
		mScroller.startScroll(mNextX, 0, x - mNextX, 0);
		requestLayout();
	}
	
	@Override
	public boolean dispatchTouchEvent(MotionEvent ev) {
		boolean handled = super.dispatchTouchEvent(ev);
		handled |= mGesture.onTouchEvent(ev);
		return handled;
	}
	
	protected boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
				float velocityY) {
		synchronized(HorizontalListView.this){
			mScroller.fling(mNextX, 0, (int)-velocityX, 0, 0, mMaxX, 0, 0);
		}
		requestLayout();
		
		return true;
	}
	
	protected boolean onDown(MotionEvent e) {
		mScroller.forceFinished(true);
		return true;
	}
	
	private OnGestureListener mOnGesture = new GestureDetector.SimpleOnGestureListener() {

		@Override
		public boolean onDown(MotionEvent e) {
			return HorizontalListView.this.onDown(e);
		}

		@Override
		public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
				float velocityY) {
			return HorizontalListView.this.onFling(e1, e2, velocityX, velocityY);
		}

		@Override
		public boolean onScroll(MotionEvent e1, MotionEvent e2,
				float distanceX, float distanceY) {
			
			synchronized(HorizontalListView.this){
				mNextX += (int)distanceX;
			}
			requestLayout();
			
			return true;
		}

		@Override
		public boolean onSingleTapConfirmed(MotionEvent e) {
			for(int i=0;i<getChildCount();i++){
				View child = getChildAt(i);
				if (isEventWithinView(e, child)) {
					if(mOnItemClicked != null){
						mOnItemClicked.onItemClick(HorizontalListView.this, child, mLeftViewIndex + 1 + i, mAdapter.getItemId( mLeftViewIndex + 1 + i ));
					}
					if(mOnItemSelected != null){
						mOnItemSelected.onItemSelected(HorizontalListView.this, child, mLeftViewIndex + 1 + i, mAdapter.getItemId( mLeftViewIndex + 1 + i ));
					}
					break;
				}
				
			}
			return true;
		}
		
		@Override
		public void onLongPress(MotionEvent e) {
			int childCount = getChildCount();
			for (int i = 0; i < childCount; i++) {
				View child = getChildAt(i);
				if (isEventWithinView(e, child)) {
					if (mOnItemLongClicked != null) {
						mOnItemLongClicked.onItemLongClick(HorizontalListView.this, child, mLeftViewIndex + 1 + i, mAdapter.getItemId(mLeftViewIndex + 1 + i));
					}
					break;
				}

			}
		}

		private boolean isEventWithinView(MotionEvent e, View child) {
            Rect viewRect = new Rect();
            int[] childPosition = new int[2];
            child.getLocationOnScreen(childPosition);
            int left = childPosition[0];
            int right = left + child.getWidth();
            int top = childPosition[1];
            int bottom = top + child.getHeight();
            viewRect.set(left, top, right, bottom);
            return viewRect.contains((int) e.getRawX(), (int) e.getRawY());
        }
	};

	

}

2楼zhouyuanjing昨天 10:00很不错！n楼主有点不足的是，滑到最左边或最右边没有那个 反弹的效果Re: lb454048898昨天 13:48回复zhouyuanjingn可以自己添加。我不太喜欢那个反弹效果1楼happyboywlg昨天 14:33横向的，值得学习

    

    来源: 互联网  发布时间: 2014-02-18

关于ssh证书访问git仓库时的权限问题
  cp /home/lulei1/my_android/.repo/repo/repo /usr/bin/repo


@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@         WARNING: UNPROTECTED PRIVATE KEY FILE!          @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Permissions 0740 for '/home/lulei1/.ssh/id_rsa' are too open.
It is recommended that your private key files are NOT accessible by others.
This private key will be ignored.
bad permissions: ignore key: /home/lulei1/.ssh/id_rsa
Permission denied (publickey).
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@         WARNING: UNPROTECTED PRIVATE KEY FILE!          @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Permissions 0740 for '/home/lulei1/.ssh/id_rsa' are too open.
It is recommended that your private key files are NOT accessible by others.
This private key will be ignored.
bad permissions: ignore key: /home/lulei1/.ssh/id_rsa
Permission denied (publickey).

fatal: The remote end hung up unexpectedly

正确的设置

chmod 600 id_rsa

    

    来源: 互联网  发布时间: 2014-02-18

如何点击按钮修改文本的尺寸
原问题来自于CSDN问答频道，更多见：http://ask.csdn.net/questions/1183

目前正在开发iphone应用，需要实现通过点击一个按钮，修改标签中的文本尺寸，不知道这种功能应该怎么实现？应该是在ios5中开发的。谢谢指教~~

：

创建UILabel

self.lbl=[[UILabel alloc] initWithFrame:CGRectMake(135, 290,200,35)];
    self.lbl.backgroundColor=[UIColor clearColor];
    NSString *str=[NSString stringWithFormat:@"%.f",[self.slider value]];
    [self.lbl setFont:[UIFont fontWithName:@"Arial-BoldMT" size:16]];
    self.lbl.text=str;
    [self.View addSubview:self.lbl];

点击UIButton时修改UILabel文本尺寸

-(IBAction)ButtonPressed:(id)sender
{
    [self.lbl setFont:[UIFont fontWithName:@"Arial-BoldMT" size:25]];
}