Android PullDownListView ScrollView Adapter之間下拉重新整理重疊之坑以及解決辦法
阿新 • • 發佈：2019-02-13
自學Android一年了，做了大大小小一些App，參與了專案前臺後臺開發一年以來，個人感覺進步很大，遇到過很多坑。但是總是因為時間和文筆太爛無處下手沒有記錄自己的學習心得，真是遺憾。今天晚上遇到這個問題是第二次了，突然想到自己第一次解決問題的痛苦，那種經歷歷歷在目。所以一定要mark一下記錄自己遇到的坑。
上圖，就是這種效果：
錯誤程式碼：
<com.app.controls.PullDownListView android:id="@+id/bill_list_listView_billlist" android:layout_width="match_parent" android:layout_height="wrap_content"android:background="@android:color/white" android:cacheColorHint="#00000000" android:divider="@drawable/line" android:dividerHeight="2dp" android:fadingEdge="none" android:footerDividersEnabled="true" > </com.app.controls.PullDownListView>
正確程式碼：
<com.app.controls.PullDownListView android:id="@+id/bill_list_listView_billlist" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@android:color/white" android:cacheColorHint="#00000000" android:divider="@drawable/line" android:dividerHeight="2dp" android:fadingEdge="none" android:footerDividersEnabled="true" > </com.app.controls.PullDownListView>
真是太尷尬了。本來在模擬器上還好好的，我自己用真機測了一下嚇我一跳，這個熟悉的錯誤又回來了。記得第一次各種搜listview下拉重新整理和scrollView巢狀的下拉衝突等，有高手說重新計算一下內容所佔高度，然後做scrollToTop操作，具體部落格地址不記得了。但是我記得後來是因為我的一個屬性把我坑了，就是pullListView一定不要寫wrap_content屬性，一定要改成match_parent。就這個問題，我自己mark一下，以免以後還犯這種錯誤~
福利來了，下拉重新整理的點選載入更多的ListView原始碼來了~~
public class PullDownListView extends ListView implements OnScrollListener {
private final static int RELEASE_To_REFRESH = 0;
private final static int PULL_To_REFRESH = 1;
// 正在重新整理
private final static int REFRESHING = 2;
// 重新整理完成
private final static int REFRESH_DONE = 3;
private final static int LOADING = 4;
private final int FETCHMORING = 5;
private final int FETCHMORE_DONE = 6;
private final int FETCHMORE_NOTHING_DONE = 7;
private final static int RATIO = 3;
private LayoutInflater inflater;
private LinearLayout headView;
private TextView tipsTextview;
private TextView lastUpdatedTextView;
private ImageView arrowImageView;
private ProgressBar progressBar;
private LinearLayout footView;
private TextView textviewMore;
private ProgressBar progressBarMore;
// private LinearLayout linearLayoutSpliter;
private int moreState;
private RotateAnimation animation;
private RotateAnimation reverseAnimation;
private boolean isRecored;
private int headContentWidth;
private int headContentHeight;
private int startY;
private int firstItemIndex;
private int state;
private boolean isBack;
private OnRefreshListener refreshListener;
private boolean isRefreshable;
int i = 1;
public PullDownListViewV2(Context context) {
super(context);
init(context);
}
public PullDownListViewV2(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
private void init(Context context) {
setCacheColorHint(context.getResources().getColor(R.color.transparent));
inflater = LayoutInflater.from(context);
headView = (LinearLayout) inflater.inflate(
R.layout.scrollover_head, null);
arrowImageView = (ImageView) headView
.findViewById(R.id.head_arrowImageView);
arrowImageView.setMinimumWidth(100);
arrowImageView.setMinimumHeight(50);
progressBar = (ProgressBar) headView
.findViewById(R.id.head_progressBar);
tipsTextview = (TextView) headView.findViewById(R.id.head_tipsTextView);
lastUpdatedTextView = (TextView) headView
.findViewById(R.id.head_lastUpdatedTextView);
measureView(headView);
headContentHeight = headView.getMeasuredHeight();
headContentWidth = headView.getMeasuredWidth();
headView.setPadding(0, -1 * headContentHeight, 0, 0);
headView.invalidate();
Log.v("@@@@@@", "width:" + headContentWidth + " height:"
+ headContentHeight);
addHeaderView(headView, null, false);
setOnScrollListener(this);
animation = new RotateAnimation(0, -180,
RotateAnimation.RELATIVE_TO_SELF, 0.5f,
RotateAnimation.RELATIVE_TO_SELF, 0.5f);
animation.setInterpolator(new LinearInterpolator());
animation.setDuration(250);
animation.setFillAfter(true);
reverseAnimation = new RotateAnimation(-180, 0,
RotateAnimation.RELATIVE_TO_SELF, 0.5f,
RotateAnimation.RELATIVE_TO_SELF, 0.5f);
reverseAnimation.setInterpolator(new LinearInterpolator());
reverseAnimation.setDuration(200);
reverseAnimation.setFillAfter(true);
state = REFRESH_DONE;
footView = (LinearLayout) inflater.inflate(
R.layout.scrollover_footer, null);
textviewMore = (TextView) footView.findViewById(R.id.textviewFetchMore);
textviewMore.setText(R.string.pulldown_footer_more);
progressBarMore = (ProgressBar) footView.findViewById(R.id.progressBar);
footView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
moreState = FETCHMORING;
changeFooterView();
refreshListener.onMore();
}
});
//addFooterView(footView, null, false);
// linearLayoutSpliter = (LinearLayout) footView
// .findViewById(R.id.linearLayoutSpliter);
// linearLayoutSpliter.setVisibility(View.VISIBLE);
isRefreshable = false;
}
public void onScroll(AbsListView arg0, int firstVisiableItem, int arg2,
int arg3) {
firstItemIndex = firstVisiableItem;
}
private int ListPos = 0;
public void onScrollStateChanged(AbsListView arg0, int scrollState) {
if (scrollState == OnScrollListener.SCROLL_STATE_IDLE) {
ListPos = getFirstVisiblePosition(); // ListPos記錄當前可見的List頂端的一行的位置
}
}
private final Handler mHandler = new Handler();
private Runnable mScrollTo = new Runnable() {
@Override
public void run() {
setSelection(ListPos);
}
};
public boolean onTouchEvent(MotionEvent event) {
if (isRefreshable) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
if (firstItemIndex == 0 && !isRecored) {
isRecored = true;
startY = (int) event.getY();
Log.v("@@@@@@", "ACTION_DOWN 這是第 " + i++ + "步" + 1);
}
break;
case MotionEvent.ACTION_UP:
if (state != REFRESHING && state != LOADING) {
if (state == REFRESH_DONE) {
}
if (state == PULL_To_REFRESH) {
state = REFRESH_DONE;
Log.v("@@@@@@",
"ACTION_UP PULL_To_REFRESH and changeHeaderViewByState()"
+ " 這是第 " + i++ + "步前" + 2);
changeHeaderViewByState();
Log.v("@@@@@@",
"ACTION_UP PULL_To_REFRESH and changeHeaderViewByState() "
+ "這是第 " + i++ + "步後" + 2);
}
if (state == RELEASE_To_REFRESH) {
state = REFRESHING;
Log.v("@@@@@@",
"ACTION_UP RELEASE_To_REFRESH changeHeaderViewByState() "
+ "這是第 " + i++ + "步" + 3);
changeHeaderViewByState();
onRefresh();
Log.v("@@@@@@",
"ACTION_UP RELEASE_To_REFRESH changeHeaderViewByState()"
+ " 這是第 " + i++ + "步" + 3);
}
}
isRecored = false;
isBack = false;
break;
case MotionEvent.ACTION_MOVE:
int tempY = (int) event.getY();
if (!isRecored && firstItemIndex == 0) {
isRecored = true;
startY = tempY;
Log.v("@@@@@@", "ACTION_MOVE 這是第 " + i++ + "步" + 4);
}
if (state != REFRESHING && isRecored && state != LOADING) {
if (state == RELEASE_To_REFRESH) {
setSelection(0);
if (((tempY - startY) / RATIO < headContentHeight)
&& (tempY - startY) > 0) {
state = PULL_To_REFRESH;
changeHeaderViewByState();
Log.v("@@@@@@", "changeHeaderViewByState() 這是第 "
+ i++ + "步" + 5);
} else if (tempY - startY <= 0) {
state = REFRESH_DONE;
changeHeaderViewByState();
Log.v("@@@@@@",
"ACTION_MOVE RELEASE_To_REFRESH 2 changeHeaderViewByState "
+ "這是第 " + i++ + "步" + 6);
}
}
if (state == PULL_To_REFRESH) {
setSelection(0);
if ((tempY - startY) / RATIO >= headContentHeight) {
state = RELEASE_To_REFRESH;
isBack = true;
Log.v("@@@@@@", "changeHeaderViewByState "
+ "這是第 " + i++ + "步前" + 7);
changeHeaderViewByState();
Log.v("@@@@@@", "changeHeaderViewByState "
+ "這是第 " + i++ + "步後" + 7);
} else if (tempY - startY <= 0) {
state = REFRESH_DONE;
changeHeaderViewByState();
Log.v("@@@@@@",
"ACTION_MOVE changeHeaderViewByState PULL_To_REFRESH 2"
+ " 這是第 " + i++ + "步" + 8);
}
}
if (state == REFRESH_DONE) {
int top = getFirstVisiblePosition();
int firstTop = 0;
if (getChildAt(0) != null)
firstTop = getChildAt(0).getTop();
int listPadding = getListPaddingTop();
if (top <= 0 && firstTop >= listPadding) {
if (tempY - startY > 0) {
state = PULL_To_REFRESH;
Log.v("@@@@@@",
"ACTION_MOVE DONE changeHeaderViewByState "
+ "這是第 " + i++ + "步前" + 9);
changeHeaderViewByState();
Log.v("@@@@@@",
"ACTION_MOVE DONE changeHeaderViewByState "
+ "這是第 " + i++ + "步後" + 9);
}
}
}
if (state == PULL_To_REFRESH) {
headView.setPadding(0, -1 * headContentHeight
+ (tempY - startY) / RATIO, 0, 0);
Log.v("@@@@@@", -1 * headContentHeight
+ (tempY - startY) / RATIO
+ "ACTION_MOVE PULL_To_REFRESH 3 這是第 " + i++
+ "步" + 10);
}
if (state == RELEASE_To_REFRESH) {
headView.setPadding(0, (tempY - startY) / RATIO
- headContentHeight, 0, 0);
Log.v("@@@@@@", "ACTION_MOVE PULL_To_REFRESH 4 這是第 "
+ i++ + "步" + 11);
}
}
break;
}
}
return super.onTouchEvent(event);
}
private void changeHeaderViewByState() {
switch (state) {
case RELEASE_To_REFRESH:
arrowImageView.setVisibility(View.VISIBLE);
progressBar.setVisibility(View.GONE);
tipsTextview.setVisibility(View.VISIBLE);
lastUpdatedTextView.setVisibility(View.VISIBLE);
arrowImageView.clearAnimation();
arrowImageView.startAnimation(animation);
tipsTextview.setText(R.string.pulldown_header_up_refresh);
Log.v("@@@@@@", "RELEASE_To_REFRESH 這是第 " + i++ + "步" + 12
+ "請釋放 重新整理");
break;
case PULL_To_REFRESH:
progressBar.setVisibility(View.GONE);
tipsTextview.setVisibility(View.VISIBLE);
lastUpdatedTextView.setVisibility(View.VISIBLE);
arrowImageView.clearAnimation();
arrowImageView.setVisibility(View.VISIBLE);
if (isBack) {
isBack = false;
arrowImageView.clearAnimation();
arrowImageView.startAnimation(reverseAnimation);
// tipsTextview.setText("isBack is true ！！！");
} else {
// tipsTextview.setText("isBack is false ！！！");
}
tipsTextview.setText(R.string.pulldown_header_down_refresh);
Log.v("@@@@@@", "PULL_To_REFRESH 這是第 " + i++ + "步" + 13
+ " changeHeaderViewByState()");
break;
case REFRESHING:
headView.setPadding(0, 0, 0, 0);
progressBar.setVisibility(View.VISIBLE);
arrowImageView.clearAnimation();
arrowImageView.setVisibility(View.GONE);
tipsTextview.setText(R.string.pulldown_header_refreshing);
lastUpdatedTextView.setVisibility(View.VISIBLE);
Log.v("@@@@@@", "REFRESHING 這是第 " + i++ + "步"
+ "正在載入中 ...REFRESHING");
break;
case REFRESH_DONE:
headView.setPadding(0, -1 * headContentHeight, 0, 0);
progressBar.setVisibility(View.GONE);
arrowImageView.clearAnimation();
arrowImageView.setImageResource(R.drawable.z_arrow_down);
tipsTextview.setText(R.string.pulldown_header_down_refresh);
lastUpdatedTextView.setVisibility(View.VISIBLE);
mHandler.post(mScrollTo);
// showFooterView();
int count = this.getAdapter().getCount();
if(count > 8 && getFooterViewsCount() == 0)
addFooterView(footView, null, false);
else if(count <= 8 && getFooterViewsCount() > 0){
removeFooterView(footView);
}
Log.v("@@@@@@", "Refresh DONE 這是第 " + i++ + "步" + "已經載入完畢- DONE ");
break;
}
}
private void changeFooterView() {
switch (moreState) {
case FETCHMORE_DONE:
textviewMore.setText(R.string.pulldown_footer_more);
progressBarMore.setVisibility(GONE);
Logger.d("當前狀態，fetch more done");
break;
case FETCHMORING:
progressBarMore.setVisibility(VISIBLE);
textviewMore.setText(R.string.pulldown_load_more);
Logger.d("當前狀態，fetch moring");
break;
case FETCHMORE_NOTHING_DONE:
progressBarMore.setVisibility(VISIBLE);
textviewMore.setText(R.string.pulldown_load_more);
Logger.d("當前狀態，fetch moring");
}
}
public void removeFooter(){
if(getFooterViewsCount() > 0){
removeFooterView(footView);
}
}
public void setonRefreshListener(OnRefreshListener refreshListener) {
setonRefreshListener(refreshListener, true);
}
public void setonRefreshListener(OnRefreshListener refreshListener, boolean isRefresh) {
this.refreshListener = refreshListener;
isRefreshable = isRefresh;
}
public interface OnRefreshListener {
public void onRefresh();
public void onMore();
//public void onInit();
}
public void onRefreshComplete() {
state = REFRESH_DONE;
lastUpdatedTextView.setText(R.string.pulldown_update);
lastUpdatedTextView.setText(lastUpdatedTextView.getText()
+ new Date().toLocaleString());
changeHeaderViewByState();
Log.v("@@@@@@", "onRefreshComplete() 被呼叫。。。");
}
public void onMoreComplete() {
moreState = FETCHMORE_DONE;
changeFooterView();
}
public void onMoreNothingComplete(){
moreState = FETCHMORE_NOTHING_DONE;
changeFooterView();
}
private void onRefresh() {
if (refreshListener != null) {
refreshListener.onRefresh();
Log.v("@@@@@@", "onRefresh被呼叫，這是第 " + i++ + "步");
}
}
private void measureView(View child) {
ViewGroup.LayoutParams p = child.getLayoutParams();
if (p == null) {
p = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
}
int childWidthSpec = ViewGroup.getChildMeasureSpec(0, 0 + 0, p.width);
int lpHeight = p.height;
int childHeightSpec;
if (lpHeight > 0) {
childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight,
MeasureSpec.EXACTLY);
} else {
childHeightSpec = MeasureSpec.makeMeasureSpec(0,
MeasureSpec.UNSPECIFIED);
}
child.measure(childWidthSpec, childHeightSpec);
}
public void setAdapter(BaseAdapter adapter) {
lastUpdatedTextView.setText(R.string.pulldown_update);
lastUpdatedTextView.setText(lastUpdatedTextView.getText()
+ new Date().toLocaleString());
super.setAdapter(adapter);
}