如何实现QuickReturnList在活动？ [英] How to implement QuickReturnList in an Activity?
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问题描述
如何实现的标签，使用活动为每个标签。我发现本教程但与片段实施。 这里是显示正是我想要做的视频。
下面是我一直在努力做：
DefaultActivity.java
@覆盖
保护无效的onCreate（捆绑savedInstanceState）{
super.onCreate（savedInstanceState）; LayoutInflater吹气=（LayoutInflater）DefaultActivity.this.getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
鉴于= inflater.inflate（R.layout.fragment，NULL）;
mHeader = inflater.inflate（R.layout.header，NULL）;
mQuickReturnView =（TextView中）view.findViewById（R.id.sticky）;
mPlaceHolder = mHeader.findViewById（R.id.placeholder）; mListView =（QuickReturnListView）getListView（）; //在这里展示类转换异常 mQuickReturnView.setText（默认）;
mListView.addHeaderView（mHeader）; String []数组=新的String [] {机器人，机器人，机器人，
机器人，机器人，机器人，机器人，机器人，
机器人，机器人，机器人，机器人，机器人，
机器人，机器人，机器人}; ArrayAdapter＆LT;串GT;适配器=新ArrayAdapter＆LT;串GT;（这一点，
android.R.layout.simple_list_item_1，数组）;
mListView.getViewTreeObserver（）。addOnGlobalLayoutListener（
新ViewTreeObserver.OnGlobalLayoutListener（）{
@覆盖
公共无效onGlobalLayout（）{
mQuickReturnHeight = mQuickReturnView.getHeight（）;
mListView.computeScrollY（）;
mCachedVerticalScrollRange = mListView.getListHeight（）;
}
}）; mListView.setOnScrollListener（新OnScrollListener（）{
@燮pressLint（NewApi）
@覆盖
公共无效onScroll（AbsListView观点，诠释firstVisibleItem，
INT visibleItemCount，诠释totalItemCount）{ mScrollY = 0;
INT translationY = 0; 如果（mListView.scrollYIsComputed（））{
mScrollY = mListView.getComputedScrollY（）;
} INT rawY = mPlaceHolder.getTop（）
- Math.min（
mCachedVerticalScrollRange
- mListView.getHeight（），mScrollY）; 开关（mState）{
案例STATE_OFFSCREEN：
如果（rawY＆LT; = mMinRawY）{
mMinRawY = rawY;
}其他{
mState = STATE_RETURNING;
}
translationY = rawY;
打破; 案例STATE_ONSCREEN：
如果（rawY＆LT; -mQuickReturnHeight）{
mState = STATE_OFFSCREEN;
mMinRawY = rawY;
}
translationY = rawY;
打破; 案例STATE_RETURNING：
translationY =（rawY - mMinRawY） - mQuickReturnHeight;
如果（translationY大于0）{
translationY = 0;
mMinRawY = rawY - mQuickReturnHeight;
} 如果（rawY大于0）{
mState = STATE_ONSCREEN;
translationY = rawY;
} 如果（translationY＆LT; -mQuickReturnHeight）{
mState = STATE_OFFSCREEN;
mMinRawY = rawY;
}
打破;
} / **这可如果构建低于蜂窝使用** /
如果（Build.VERSION.SDK_INT＆LT; = Build.VERSION_ codeS.HONEYCOMB）{
阿尼姆=新TranslateAnimation（0，0，translationY，
translationY）;
anim.setFillAfter（真）;
anim.setDuration（0）;
mQuickReturnView.startAnimation（阿尼姆）;
}其他{
mQuickReturnView.setTranslationY（translationY）;
} } @覆盖
公共无效onScrollStateChanged（AbsListView观点，诠释scrollState）{
}
}）;
rlMain =（RelativeLayout的）findViewById（R.id.main）;
rlMain.addView（视图）;
的setContentView（R.layout.activity_main）; }
现在它显示误差 mListView =（QuickReturnListView）getListView（）;
02-13 21：23：03.389：E / AndroidRuntime（26896）：了java.lang.RuntimeException：无法启动活动ComponentInfo{com.example.quickreturnlistwithactivity/com.example.quickreturnlistwithactivity.QuickReturnActivity}: java.lang.ClassCastException：android.widget.ListView不能转换为com.example.quickreturnlistwithactivity.QuickReturnListView
02-13 21：23：03.389：E / AndroidRuntime（26896）：java.lang.ClassCastException：致android.widget.ListView不能转换为com.example.quickreturnlistwithactivity.QuickReturnListView
02-13 21：23：03.389：E / AndroidRuntime（26896）：在com.example.quickreturnlistwithactivity.QuickReturnActivity.onCreate（QuickReturnActivity.java:67）
解决方案
您确定您有标记的样子：
＆LT; your_package_path.QuickReturnListView
How to implement tabs, using activity for each tab. I found this tutorial but it implemented with Fragments. Here is a video that show exactly what I want to do.
Here what I been trying to do:
DefaultActivity.java
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
LayoutInflater inflater = (LayoutInflater) DefaultActivity.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.fragment, null);
mHeader = inflater.inflate(R.layout.header, null);
mQuickReturnView = (TextView) view.findViewById(R.id.sticky);
mPlaceHolder = mHeader.findViewById(R.id.placeholder);
mListView = (QuickReturnListView) getListView(); //showing class cast exception here
mQuickReturnView.setText("Default");
mListView.addHeaderView(mHeader);
String[] array = new String[] { "Android", "Android", "Android",
"Android", "Android", "Android", "Android", "Android",
"Android", "Android", "Android", "Android", "Android",
"Android", "Android", "Android" };
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1,array);
mListView.getViewTreeObserver().addOnGlobalLayoutListener(
new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
mQuickReturnHeight = mQuickReturnView.getHeight();
mListView.computeScrollY();
mCachedVerticalScrollRange = mListView.getListHeight();
}
});
mListView.setOnScrollListener(new OnScrollListener() {
@SuppressLint("NewApi")
@Override
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
mScrollY = 0;
int translationY = 0;
if (mListView.scrollYIsComputed()) {
mScrollY = mListView.getComputedScrollY();
}
int rawY = mPlaceHolder.getTop()
- Math.min(
mCachedVerticalScrollRange
- mListView.getHeight(), mScrollY);
switch (mState) {
case STATE_OFFSCREEN:
if (rawY <= mMinRawY) {
mMinRawY = rawY;
} else {
mState = STATE_RETURNING;
}
translationY = rawY;
break;
case STATE_ONSCREEN:
if (rawY < -mQuickReturnHeight) {
mState = STATE_OFFSCREEN;
mMinRawY = rawY;
}
translationY = rawY;
break;
case STATE_RETURNING:
translationY = (rawY - mMinRawY) - mQuickReturnHeight;
if (translationY > 0) {
translationY = 0;
mMinRawY = rawY - mQuickReturnHeight;
}
if (rawY > 0) {
mState = STATE_ONSCREEN;
translationY = rawY;
}
if (translationY < -mQuickReturnHeight) {
mState = STATE_OFFSCREEN;
mMinRawY = rawY;
}
break;
}
/** this can be used if the build is below honeycomb **/
if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.HONEYCOMB) {
anim = new TranslateAnimation(0, 0, translationY,
translationY);
anim.setFillAfter(true);
anim.setDuration(0);
mQuickReturnView.startAnimation(anim);
} else {
mQuickReturnView.setTranslationY(translationY);
}
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
}
});
rlMain = (RelativeLayout)findViewById(R.id.main);
rlMain.addView(view);
setContentView(R.layout.activity_main);
}
Now it showing error in mListView = (QuickReturnListView) getListView();
02-13 21:23:03.389: E/AndroidRuntime(26896): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.quickreturnlistwithactivity/com.example.quickreturnlistwithactivity.QuickReturnActivity}: java.lang.ClassCastException: android.widget.ListView cannot be cast to com.example.quickreturnlistwithactivity.QuickReturnListView
02-13 21:23:03.389: E/AndroidRuntime(26896): Caused by: java.lang.ClassCastException: android.widget.ListView cannot be cast to com.example.quickreturnlistwithactivity.QuickReturnListView
02-13 21:23:03.389: E/AndroidRuntime(26896): at com.example.quickreturnlistwithactivity.QuickReturnActivity.onCreate(QuickReturnActivity.java:67)
解决方案
Are you sure that you have the markup looks like:
<your_package_path.QuickReturnListView
这篇关于如何实现QuickReturnList在活动？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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