简介
毕业后第一家公司上班已经三天啦,处于代码交接的尴尬时期,没啥具体工作,看了一下几乎每个项目中都会用到的下拉刷新和上拉加载更多,目前应用最多的应该是Ultra Pull To Refresh了,这个框架很强大(除了没有上拉加载过程,但是作者说这不是这个空间应该有的功能,好吧...),可以自定义下拉刷新布局,并提供了简单易懂的下拉刷新接口,供开发者自己实现。后再掘金上发现了另外一个强大的刷新框架SmartRefreshLayout,该框架应该也是参照了前者的思路,不过强大的是,可以自动识别头尾刷新布局,并且直接应用到刷新空间中,虽然没有对外提供方法,不过提供了很多种默认的实现。仿照默认实现也可自己定制。
效果图
GIF.gif
Pull To Refresh 实现方式
public class JdFreshHead extends FrameLayout implements PtrUIHandler {
private ImageView iv_man;
private ImageView iv_goods;
private TextView tv_refresh;
private int state;
public static final int STATE_RESET = -1;
public static final int STATE_PREPARE = 0;
public static final int STATE_BEGIN = 1;
public static final int STATE_FINISH = 2;
public JdFreshHead(@NonNull Context context) {
super(context);
initView();
}
public JdFreshHead(@NonNull Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
initView();
}
private void initView() {
View view = LayoutInflater.from(getContext()).inflate(R.layout.refresh_head, this, true);
iv_man = view.findViewById(R.id.iv_man);
iv_goods = view.findViewById(R.id.iv_goods);
tv_refresh = ((TextView) view.findViewById(R.id.tv_remain));
}
@Override
public void onUIReset(PtrFrameLayout frame) {
state=STATE_RESET;
}
@Override
public void onUIRefreshPrepare(PtrFrameLayout frame) {
state=STATE_PREPARE;
}
@Override
public void onUIRefreshBegin(PtrFrameLayout frame) {
state=STATE_BEGIN;
iv_goods.setVisibility(GONE);
iv_man.setBackgroundResource(R.drawable.running);
AnimationDrawable background = (AnimationDrawable) iv_man.getBackground();
if (!background.isRunning()) {
background.start();
}
}
@Override
public void onUIRefreshComplete(PtrFrameLayout frame) {
state=STATE_FINISH;
AnimationDrawable drawable = (AnimationDrawable) iv_man.getBackground();
if (drawable.isRunning()) {
drawable.stop();
}
}
@Override
public void onUIPositionChange(PtrFrameLayout frame, boolean isUnderTouch, byte status, PtrIndicator ptrIndicator) {
switch (state){
case STATE_PREPARE:
if (ptrIndicator.getCurrentPercent()<1.2){
tv_refresh.setText("下拉刷新.....");
}else {
tv_refresh.setText("松开刷新.....");
}
if (ptrIndicator.getCurrentPercent()<1){
FrameLayout.LayoutParams layoutParams = (FrameLayout.LayoutParams) iv_man.getLayoutParams();
layoutParams.setMargins(0,0, (int) ((1-ptrIndicator.getCurrentPercent())*300),0);
iv_man.setLayoutParams(layoutParams);
iv_man.setAlpha(ptrIndicator.getCurrentPercent());
iv_man.setScaleX(ptrIndicator.getCurrentPercent());
iv_man.setScaleY(ptrIndicator.getCurrentPercent());
iv_goods.setAlpha(ptrIndicator.getCurrentPercent());
iv_goods.setScaleX(ptrIndicator.getCurrentPercent());
iv_goods.setScaleY(ptrIndicator.getCurrentPercent());
}
break;
case STATE_BEGIN:
tv_refresh.setText("更新中 .....");
iv_goods.setVisibility(GONE);
break;
case STATE_FINISH:
tv_refresh.setText("刷新完成.....");
iv_man.setBackgroundResource(R.drawable.person);
iv_goods.setVisibility(VISIBLE);
break;
case STATE_RESET:
tv_refresh.setText("刷新重置.....");
break;
}
}
}
public class JDReFreshLayout extends PtrFrameLayout {
private JdFreshHead jdFreshHead;
public JDReFreshLayout(Context context) {
super(context);
init();
}
public JDReFreshLayout(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
private void init() {
jdFreshHead = new JdFreshHead(getContext());
setHeaderView(jdFreshHead);
addPtrUIHandler(jdFreshHead);
}
}
SmartRefreshLayout(实现RefreshHeader接口自动识别为刷新头)
public class JdSmartHead extends FrameLayout implements RefreshHeader {
private static final String TAG = "1111111111";
private View mContent;
private ImageView iv_man;
private ImageView iv_goods;
private TextView tv_remain; //刷新提示文字
private LayoutParams mContentLayoutParams;
private LayoutParams iv_manLayoutParams;
private AnimationDrawable drawable;
public JdSmartHead(Context context) {
super(context, null);
}
public JdSmartHead(Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
mContent = LayoutInflater.from(context).inflate(R.layout.refresh_head, null);
iv_man = mContent.findViewById(R.id.iv_man);
iv_goods = mContent.findViewById(R.id.iv_goods);
tv_remain = mContent.findViewById(R.id.tv_remain);
addView(mContent);
}
@Override
public void onPullingDown(float percent, int offset, int headerHeight, int extendHeight) {
Log.d(TAG, "onPullingDown: percent :" + percent + " headHeight " + headerHeight);
mContentLayoutParams = (LayoutParams) mContent.getLayoutParams();
mContentLayoutParams.topMargin = (int) (-(1 - percent) * headerHeight);
mContent.setLayoutParams(mContentLayoutParams);
if (percent<1){
iv_goods.setScaleY(percent);
iv_goods.setScaleX(percent);
iv_man.setScaleY(percent);
iv_man.setScaleX(percent);
iv_manLayoutParams = ((LayoutParams) iv_man.getLayoutParams());
iv_manLayoutParams.rightMargin= (int) (200*(1-percent));
iv_man.setLayoutParams(iv_manLayoutParams);
tv_remain.setText("下拉刷新....");
}else {
tv_remain.setText("释放刷新....");
}
}
@Override
public void onReleasing(float percent, int offset, int headerHeight, int extendHeight) {
Log.d(TAG, "onReleasing: percent :" + percent);
mContentLayoutParams = (LayoutParams) mContent.getLayoutParams();
mContentLayoutParams.topMargin = (int) (-(1 - percent) * headerHeight);
mContent.setLayoutParams(mContentLayoutParams);
if (percent<1){
iv_goods.setScaleY(percent);
iv_goods.setScaleX(percent);
iv_man.setScaleY(percent);
iv_man.setScaleX(percent);
}else {
tv_remain.setText("刷新中....");
}
}
@NonNull
@Override
public View getView() {
Log.d(TAG, "getView: ");
return this;
}
@Override
public SpinnerStyle getSpinnerStyle() {
// Log.d(TAG, "getSpinnerStyle: ");
return null;
}
@Override
public void setPrimaryColors(int... colors) {
// Log.d(TAG, "setPrimaryColors: ");
}
@Override
public void onInitialized(RefreshKernel kernel, int height, int extendHeight) {
FrameLayout.LayoutParams layoutParams = (FrameLayout.LayoutParams) mContent.getLayoutParams();
layoutParams.topMargin = -height;
Log.d(TAG, "onInitialized: ");
}
@Override
public void onStartAnimator(RefreshLayout layout, int height, int extendHeight) {
iv_man.setBackgroundResource(R.drawable.running);
drawable = (AnimationDrawable) iv_man.getBackground();
if (!drawable.isRunning())
drawable.start();
iv_goods.setVisibility(GONE);
}
@Override
public int onFinish(RefreshLayout layout, boolean success) {
if (drawable.isRunning()) {
drawable.stop();
drawable=null;
}
iv_goods.setVisibility(VISIBLE);
iv_man.setBackgroundResource(R.drawable.person);
return 0;
}
@Override
public void onStateChanged(RefreshLayout refreshLayout, RefreshState oldState, RefreshState newState) {
Log.d(TAG, "onStateChanged: ");
}
}