如何實現製表符,使用每個製表符的活動。我找到了this tutorial,但它使用Fragments實現。 Here是一個顯示我想要做什麼的視頻。如何在活動中實現QuickReturnList?
這裏是我一直在努力做:
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);
}
現在顯示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)
你有什麼問題? –
我的主要問題是在嘗試使用活動在視頻中給出完全相同的listview。在示例代碼中使用片段。 – Kunu
@MD我知道我不太清楚,但是如果你通過這個例子,你會明白我的問題。 – Kunu