先来上个图看看效果:
这里我为什么要单独把这个拿出来呢,因为最近才开始接触Android最新的东西,也就是5.0以上的东西,发现Android提供的SwipeToRefreshLayout是没有上拉加载更多的,在网上找了不少第三方提供加载更多的项目,大部分都还在使用以前ListView时候使用的那一套加载更多的效果,但是效果都不是很好,所以萌生了要把这部分单独抽出来的想法。
第一张图就是在下拉刷新以及加载更多的时候的效果,第二张是加载动画,也是可以放大的,不过在某些手机版本上是没效果的。
我给这个Progress命名为:MaterialProgress,这个文件内部完全是从SwipeToRefreshLayout中扒过来,然后删除了一部分影响使用的东西,所以内部还是很多不必须的代码的,所以,有需要的可以适当的删除。
它的主要用处是可以作为自定义加载更多的加载动画,你一定需要这个。
贴一部分主要代码:
/*** SwipeToRefreshLayout中下拉刷新时的等待圆环* Created by Sahadev on 2015/11/13.*/
public class MaterialProgress extends FrameLayout {<span style="white-space:pre"> </span>...public MaterialProgress(Context context) {this(context, null, 0);}public MaterialProgress(Context context, AttributeSet attrs) {this(context, attrs, 0);}public MaterialProgress(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);this.mRefreshing = false;this.mTotalDragDistance = -1.0F;this.mParentScrollConsumed = new int[2];this.mOriginalOffsetCalculated = false;this.mActivePointerId = -1;this.mCircleViewIndex = -1;this.mRefreshListener = new Animation.AnimationListener() {public void onAnimationStart(Animation animation) {}public void onAnimationRepeat(Animation animation) {}public void onAnimationEnd(Animation animation) {if (MaterialProgress.this.mRefreshing) {MaterialProgress.this.mProgress.setAlpha(255);MaterialProgress.this.mProgress.start();} else {MaterialProgress.this.mProgress.stop();MaterialProgress.this.mCircleView.setVisibility(View.VISIBLE);MaterialProgress.this.setColorViewAlpha(255);if (MaterialProgress.this.mScale) {MaterialProgress.this.setAnimationProgress(0.0F);} else {MaterialProgress.this.setTargetOffsetTopAndBottom(MaterialProgress.this.mOriginalOffsetTop - MaterialProgress.this.mCurrentTargetOffsetTop, true);}}MaterialProgress.this.mCurrentTargetOffsetTop = MaterialProgress.this.mCircleView.getTop();}};this.mAnimateToCorrectPosition = new Animation() {public void applyTransformation(float interpolatedTime, Transformation t) {boolean targetTop = false;boolean endTarget = false;int endTarget1;if (!MaterialProgress.this.mUsingCustomStart) {endTarget1 = (int) (MaterialProgress.this.mSpinnerFinalOffset - (float) Math.abs(MaterialProgress.this.mOriginalOffsetTop));} else {endTarget1 = (int) MaterialProgress.this.mSpinnerFinalOffset;}int targetTop1 = MaterialProgress.this.mFrom + (int) ((float) (endTarget1 - MaterialProgress.this.mFrom) * interpolatedTime);int offset = targetTop1 - MaterialProgress.this.mCircleView.getTop();MaterialProgress.this.setTargetOffsetTopAndBottom(offset, false);MaterialProgress.this.mProgress.setArrowScale(1.0F - interpolatedTime);}};this.mPeek = new Animation() {public void applyTransformation(float interpolatedTime, Transformation t) {boolean targetTop = false;boolean endTarget = false;int endTarget1;if (!MaterialProgress.this.mUsingCustomStart) {endTarget1 = (int) (MaterialProgress.this.mSpinnerFinalOffset - (float) Math.abs(MaterialProgress.this.mOriginalOffsetTop));} else {endTarget1 = (int) MaterialProgress.this.mSpinnerFinalOffset;}int targetTop1 = MaterialProgress.this.mFrom + (int) ((float) (endTarget1 - MaterialProgress.this.mFrom) * interpolatedTime);int offset = targetTop1 - MaterialProgress.this.mCircleView.getTop();MaterialProgress.this.setTargetOffsetTopAndBottom(offset, false);MaterialProgress.this.mProgress.setArrowScale(1.0F - interpolatedTime);}};this.mAnimateToStartPosition = new Animation() {public void applyTransformation(float interpolatedTime, Transformation t) {MaterialProgress.this.moveToStart(interpolatedTime);}};this.mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();this.mMediumAnimationDuration = 500;this.setWillNotDraw(false);this.mDecelerateInterpolator = new DecelerateInterpolator(2.0F);TypedArray a = context.obtainStyledAttributes(attrs, LAYOUT_ATTRS);this.setEnabled(a.getBoolean(0, true));a.recycle();DisplayMetrics metrics = this.getResources().getDisplayMetrics();this.mCircleWidth = (int) (40.0F * metrics.density);this.mCircleHeight = (int) (40.0F * metrics.density);this.createProgressView();ViewCompat.setChildrenDrawingOrderEnabled(this, true);this.mSpinnerFinalOffset = 64.0F * metrics.density;this.mTotalDragDistance = this.mSpinnerFinalOffset;this.mNestedScrollingParentHelper = new NestedScrollingParentHelper(this);this.mNestedScrollingChildHelper = new NestedScrollingChildHelper(this);this.setNestedScrollingEnabled(true);setColorSchemeResources(android.R.color.holo_blue_bright, android.R.color.holo_green_light,android.R.color.holo_orange_light, android.R.color.holo_red_light);setRefreshing(true);this.finishSpinner(mTotalDragDistance + 10);}private void setColorViewAlpha(int targetAlpha) {this.mCircleView.getBackground().setAlpha(targetAlpha);this.mProgress.setAlpha(targetAlpha);}public void setSize(int size) {if (size == 0 || size == 1) {DisplayMetrics metrics = this.getResources().getDisplayMetrics();if (size == 0) {this.mCircleHeight = this.mCircleWidth = (int) (56.0F * metrics.density);} else {this.mCircleHeight = this.mCircleWidth = (int) (40.0F * metrics.density);}this.mCircleView.setImageDrawable((Drawable) null);this.mProgress.updateSizes(size);this.mCircleView.setImageDrawable(this.mProgress);}}private void createProgressView() {this.mCircleView = new CircleImageView(this.getContext(), -328966, 20.0F);this.mProgress = new MaterialProgressDrawable(this.getContext(), this);this.mProgress.setBackgroundColor(-328966);this.mCircleView.setImageDrawable(this.mProgress);this.mCircleView.setVisibility(View.VISIBLE);this.mCircleView.setPadding(5, 5, 5, 5);//设置一个内边距this.addView(this.mCircleView, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));}<span style="white-space:pre"> </span>...public void setRefreshing(boolean refreshing) {if (refreshing && this.mRefreshing != refreshing) {this.mRefreshing = refreshing;boolean endTarget = false;int endTarget1;if (!this.mUsingCustomStart) {endTarget1 = (int) (this.mSpinnerFinalOffset + (float) this.mOriginalOffsetTop);} else {endTarget1 = (int) this.mSpinnerFinalOffset;}this.setTargetOffsetTopAndBottom(endTarget1 - this.mCurrentTargetOffsetTop, true);this.mNotify = false;this.startScaleUpAnimation(this.mRefreshListener);} else {this.setRefreshing(refreshing, false);}}<span style="white-space:pre"> </span>...}
在使用的时候将项目中的JAVA文件拷入工程即可,不用单独作为一个项目,每个环境可能不一样,可能会出现编译错误。快来试试吧。
项目地址:http://git.oschina.net/sahadev/MaterialProgress