微信录制小视频代码,Java代码库,德仔网

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【Java】微信录制小视频
作者:达达的梦想2013 / 发布于2015/7/16/ 1619
微信从6.0版本开始推出小视频功能，随着4G网络的出现，视频将会是一个趋势，他能表达出文字所不能表现的东西，增加了微信的黏性。还记得微信小视频这个功能一推出，如同病毒一样席卷朋友圈。看看微信小视频下滑眼镜效果，还有视频录制完，类似美拍，添加各种滤镜，炫酷MV主题，美化视频... 项目的完整代码可以去 Github （点击这里）下载 https://github.com/motianhuo/VCameraDemo

	package com.example.wechat01.widght;
	
	import android.content.Context;
	import android.graphics.Color;
	import android.util.AttributeSet;
	import android.util.Log;
	import android.view.MotionEvent;
	import android.view.View;
	import android.widget.AbsListView;
	import android.widget.AbsListView.OnScrollListener;
	import android.widget.ListView;
	import android.widget.RelativeLayout;
	
	import com.example.wechat01.R;
	import com.nineoldandroids.animation.ValueAnimator;
	import com.nineoldandroids.animation.ValueAnimator.AnimatorUpdateListener;
	
	public class PullDownListView extends RelativeLayout implements
	 OnScrollListener {
	 static int MAX_PULL_TOP_HEIGHT;
	 static int MAX_PULL_BOTTOM_HEIGHT;
	
	 static int REFRESHING_TOP_HEIGHT;
	 static int REFRESHING_BOTTOM_HEIGHT;
	
	 private boolean isTop;
	 private boolean isBottom;
	 private boolean isRefreshing;
	 private boolean isAnimation;
	
	 RelativeLayout layoutHeader;
	 RelativeLayout layoutFooter;
	
	 private int mCurrentY = 0;
	 boolean pullTag = false;
	 OnScrollListener mOnScrollListener;
	 OnPullHeightChangeListener mOnPullHeightChangeListener;
	
	 public void setOnPullHeightChangeListener(
	 OnPullHeightChangeListener listener) {
	 this.mOnPullHeightChangeListener = listener;
	 }
	
	 public void setOnScrollListener(OnScrollListener listener) {
	 mOnScrollListener = listener;
	 }
	
	 public PullDownListView(Context context, AttributeSet attrs) {
	 super(context, attrs);
	 // TODO Auto-generated constructor stub
	 }
	
	 public boolean isRefreshing() {
	 return this.isRefreshing;
	 }
	
	 private ListView mListView = new ListView(getContext()) {
	
	 int lastY = 0;
	
	 @Override
	 public boolean onTouchEvent(MotionEvent ev) {
	 if (isAnimation || isRefreshing) {
	 return super.onTouchEvent(ev);
	 }
	 RelativeLayout parent = (RelativeLayout) mListView.getParent();
	
	 int currentY = (int) ev.getRawY();
	 switch (ev.getAction()) {
	 case MotionEvent.ACTION_DOWN:
	 lastY = (int) ev.getRawY();
	 break;
	 case MotionEvent.ACTION_MOVE: {
	 boolean isToBottom = currentY - lastY >= 0 ? true : false;
	
	 int step = Math.abs(currentY - lastY);
	 lastY = currentY;
	
	 if (isTop && mListView.getTop() >= 0) {
	
	 if (isToBottom && mListView.getTop() <= MAX_PULL_TOP_HEIGHT) {
	 MotionEvent event = MotionEvent.obtain(ev);
	 ev.setAction(MotionEvent.ACTION_UP);
	 super.onTouchEvent(ev);
	 pullTag = true;
	
	 if (mListView.getTop() > layoutHeader.getHeight()) {
	 step = step / 2;
	 }
	 if ((mListView.getTop() + step) > MAX_PULL_TOP_HEIGHT) {
	 mCurrentY = MAX_PULL_TOP_HEIGHT;
	 scrollTopTo(mCurrentY);
	 } else {
	 mCurrentY += step;
	 scrollTopTo(mCurrentY);
	 }
	 } else if (!isToBottom && mListView.getTop() > 0) {
	 MotionEvent event = MotionEvent.obtain(ev);
	 ev.setAction(MotionEvent.ACTION_UP);
	 super.onTouchEvent(ev);
	 if ((mListView.getTop() - step) < 0) {
	 mCurrentY = 0;
	 scrollTopTo(mCurrentY);
	 } else {
	 mCurrentY -= step;
	 scrollTopTo(mCurrentY);
	 }
	 } else if (!isToBottom && mListView.getTop() == 0) {
	 if (!pullTag) {
	 return super.onTouchEvent(ev);
	 }
	
	 }
	
	 return true;
	 } else if (isBottom
	 && mListView.getBottom() <= parent.getHeight()) {
	 if (!isToBottom
	 && (parent.getHeight() - mListView.getBottom()) <= MAX_PULL_BOTTOM_HEIGHT) {
	 MotionEvent event = MotionEvent.obtain(ev);
	 ev.setAction(MotionEvent.ACTION_UP);
	 super.onTouchEvent(ev);
	 pullTag = true;
	 if (parent.getHeight() - mListView.getBottom() > layoutFooter
	 .getHeight()) {
	 step = step / 2;
	 }
	
	 if ((mListView.getBottom() - step) < (parent
	 .getHeight() - MAX_PULL_BOTTOM_HEIGHT)) {
	 mCurrentY = -MAX_PULL_BOTTOM_HEIGHT;
	 scrollBottomTo(mCurrentY);
	 } else {
	 mCurrentY -= step;
	 scrollBottomTo(mCurrentY);
	 }
	 } else if (isToBottom
	 && (mListView.getBottom() < parent.getHeight())) {
	 if ((mListView.getBottom() + step) > parent.getHeight()) {
	 mCurrentY = 0;
	 scrollBottomTo(mCurrentY);
	 } else {
	 mCurrentY += step;
	 scrollBottomTo(mCurrentY);
	 }
	 } else if (isToBottom
	 && mListView.getBottom() == parent.getHeight()) {
	 if (!pullTag) {
	 return super.onTouchEvent(ev);
	 }
	 }
	 return true;
	 }
	 break;
	 }
	 case MotionEvent.ACTION_CANCEL:
	 case MotionEvent.ACTION_UP:
	 pullTag = false;
	
	 if (mListView.getTop() > 0) {
	 if (mListView.getTop() > REFRESHING_TOP_HEIGHT) {
	 animateTopTo(layoutHeader.getMeasuredHeight());
	 isRefreshing = true;
	 if (null != mOnPullHeightChangeListener) {
	 mOnPullHeightChangeListener.onRefreshing(true);
	 }
	 } else {
	 animateTopTo(0);
	 }
	
	 } else if (mListView.getBottom() < parent.getHeight()) {
	 if ((parent.getHeight() - mListView.getBottom()) > REFRESHING_BOTTOM_HEIGHT) {
	 animateBottomTo(-layoutFooter.getMeasuredHeight());
	 isRefreshing = true;
	 if (null != mOnPullHeightChangeListener) {
	 mOnPullHeightChangeListener.onRefreshing(false);
	 }
	 } else {
	 animateBottomTo(0);
	 }
	 }
	
	 }
	
	 return super.onTouchEvent(ev);
	 }
	
	 };
	
	 public void scrollBottomTo(int y) {
	 mListView.layout(mListView.getLeft(), y, mListView.getRight(),
	 this.getMeasuredHeight() + y);
	 if (null != mOnPullHeightChangeListener) {
	 mOnPullHeightChangeListener.onBottomHeightChange(
	 layoutHeader.getHeight(), -y);
	 }
	 }
	
	 public void animateBottomTo(final int y) {
	 ValueAnimator animator = ValueAnimator.ofInt(mListView.getBottom()
	 - this.getMeasuredHeight(), y);
	 animator.setDuration(300);
	 animator.addUpdateListener(new AnimatorUpdateListener() {
	 @Override
	 public void onAnimationUpdate(ValueAnimator animation) {
	 // TODO Auto-generated method stub
	 int frameValue = (Integer) animation.getAnimatedValue();
	 mCurrentY = frameValue;
	 scrollBottomTo(frameValue);
	 if (frameValue == y) {
	 isAnimation = false;
	 }
	 }
	 });
	 isAnimation = true;
	 animator.start();
	 }
	
	 public void scrollTopTo(int y) {
	 mListView.layout(mListView.getLeft(), y, mListView.getRight(),
	 this.getMeasuredHeight() + y);
	 if (null != mOnPullHeightChangeListener) {
	 mOnPullHeightChangeListener.onTopHeightChange(
	 layoutHeader.getHeight(), y);
	 }
	 }
	
	 public void animateTopTo(final int y) {
	 ValueAnimator animator = ValueAnimator.ofInt(mListView.getTop(), y);
	 animator.setDuration(300);
	 animator.addUpdateListener(new AnimatorUpdateListener() {
	 @Override
	 public void onAnimationUpdate(ValueAnimator animation) {
	 // TODO Auto-generated method stub
	 int frameValue = (Integer) animation.getAnimatedValue();
	 mCurrentY = frameValue;
	 scrollTopTo(frameValue);
	 if (frameValue == y) {
	 isAnimation = false;
	 }
	 }
	 });
	 isAnimation = true;
	 animator.start();
	 }
	
	 @Override
	 public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
	 super.onMeasure(widthMeasureSpec, heightMeasureSpec);
	
	 REFRESHING_TOP_HEIGHT = layoutHeader.getMeasuredHeight();
	 REFRESHING_BOTTOM_HEIGHT = layoutFooter.getMeasuredHeight();
	
	 MAX_PULL_TOP_HEIGHT = this.getMeasuredHeight();
	 MAX_PULL_BOTTOM_HEIGHT = this.getMeasuredHeight();
	 }
	
	 @Override
	 public void onFinishInflate() {
	
	 mListView.setBackgroundColor(0xffffffff);
	 mListView.setCacheColorHint(Color.TRANSPARENT);
	 mListView.setVerticalScrollBarEnabled(false);
	 mListView.setLayoutParams(new RelativeLayout.LayoutParams(
	 LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
	 mListView.setOnScrollListener(this);
	 mListView.setDividerHeight(0);
	 this.addView(mListView);
	
	 layoutHeader = (RelativeLayout) this.findViewById(R.id.layoutHeader);
	 layoutFooter = (RelativeLayout) this.findViewById(R.id.layoutFooter);
	
	 super.onFinishInflate();
	 }
	
	 public ListView getListView() {
	 return this.mListView;
	 }
	
	 public void pullUp() {
	 isRefreshing = false;
	 if (mListView.getTop() > 0) {
	 animateTopTo(0);
	 } else if (mListView.getBottom() < this.getHeight()) {
	 animateBottomTo(0);
	 }
	
	 }
	
	 @Override
	 public void onScroll(AbsListView view, int firstVisibleItem,
	 int visibleItemCount, int totalItemCount) {
	 // TODO Auto-generated method stub
	 if (null != mOnScrollListener) {
	 mOnScrollListener.onScroll(view, firstVisibleItem,
	 visibleItemCount, totalItemCount);
	 }
	 if (mListView.getCount() > 0) {
	 if ((firstVisibleItem + visibleItemCount) == totalItemCount) {
	 View lastItem = (View) mListView
	 .getChildAt(visibleItemCount - 1);
	 if (null != lastItem) {
	
	 if (lastItem.getBottom() == mListView.getHeight()) {
	 Log.e("my", lastItem.getBottom() + "");
	 isBottom = true;
	 } else {
	 isBottom = false;
	 }
	 }
	 } else {
	 isBottom = false;
	 }
	 } else {
	 isBottom = false;
	 }
	
	 if (mListView.getCount() > 0) {
	 if (firstVisibleItem == 0) {
	 View firstItem = mListView.getChildAt(0);
	 if (null != firstItem) {
	 if (firstItem.getTop() == 0) {
	 isTop = true;
	 } else {
	 isTop = false;
	 }
	 }
	 } else {
	 isTop = false;
	 }
	 } else {
	 isTop = true;
	 }
	
	 }
	
	 @Override
	 public void onScrollStateChanged(AbsListView view, int scrollState) {
	 // TODO Auto-generated method stub
	 if (null != mOnScrollListener) {
	 mOnScrollListener.onScrollStateChanged(view, scrollState);
	 }
	 }
	
	 // listener call back
	 public interface OnPullHeightChangeListener {
	 public void onTopHeightChange(int headerHeight, int pullHeight);
	
	 public void onBottomHeightChange(int footerHeight, int pullHeight);
	
	 public void onRefreshing(boolean isTop);
	 }
	}
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