我正在打电话
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
new Loaditems().execute();
}
现在我有其他函数loadstatus()，我已经用
protected void onPostExecute(String newdt) {
// dismiss the dialog after getting all products
Dialog.dismiss();
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
loadstatus();
}
});
}
但loadstatus()并未针对此postexecute方法执行任何操作。
我想完成new Loaditems().execute();这个功能然后只需要调用loadstatus()函数。
private void loastatus() {
flingContainer = (SwipeFlingAdapterView) findViewById(R.id.frame);
al = new ArrayList<String>();
al.add("php");
// choose your favorite adapter
arrayAdapter = new ArrayAdapter<String>(MainActivity.this,
R.layout.item, R.id.tv_portal, al);
// set the listener and the adapter
flingContainer.setAdapter(arrayAdapter);
}
doinbackground代码：
protected String doInBackground(String... args) {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("id", "1"));
// getting JSON string from URL
JSONObject json = jParser.makeHttpRequest(url_all_items, "GET",
params);
try {
// Checking for SUCCESS TAG
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// products found
// Getting Array of Products
products = json.getJSONArray(TAG_PRODUCTS);
// looping through All Products
for (int i = 0; i < products.length(); i++) {
JSONObject c = products.getJSONObject(i);
// Storing each json item in variable
name = c.getString(TAG_NAME);
// al.add(name);
}
} else {
}
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(), "not done",
Toast.LENGTH_LONG).show();
}
return null;
}
SwipeFlingAdapterView上课：
公共类SwipeFlingAdapterView扩展了BaseFlingAdapterView {
private int MAX_VISIBLE = 4;
private int MIN_ADAPTER_STACK = 6;
private float ROTATION_DEGREES = 15.f;
private Adapter mAdapter;
private int LAST_OBJECT_IN_STACK = 0;
private onFlingListener mFlingListener;
private AdapterDataSetObserver mDataSetObserver;
private boolean mInLayout = false;
private View mActiveCard = null;
private OnItemClickListener mOnItemClickListener;
private FlingCardListener flingCardListener;
public SwipeFlingAdapterView(Context context) {
this(context, null);
}
public SwipeFlingAdapterView(Context context, AttributeSet attrs) {
this(context, attrs, R.attr.SwipeFlingStyle);
}
public SwipeFlingAdapterView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.SwipeFlingAdapterView, defStyle, 0);
MAX_VISIBLE = a.getInt(R.styleable.SwipeFlingAdapterView_max_visible, MAX_VISIBLE);
MIN_ADAPTER_STACK = a.getInt(R.styleable.SwipeFlingAdapterView_min_adapter_stack, MIN_ADAPTER_STACK);
ROTATION_DEGREES = a.getFloat(R.styleable.SwipeFlingAdapterView_rotation_degrees, ROTATION_DEGREES);
a.recycle();
}
/**
* A shortcut method to set both the listeners and the adapter.
*
* @param context The activity context which extends onFlingListener, OnItemClickListener or both
* @param mAdapter The adapter you have to set.
*/
public void init(final Context context, Adapter mAdapter) {
if(context instanceof onFlingListener) {
mFlingListener = (onFlingListener) context;
}else{
throw new RuntimeException("Activity does not implement SwipeFlingAdapterView.onFlingListener");
}
if(context instanceof OnItemClickListener){
mOnItemClickListener = (OnItemClickListener) context;
}
setAdapter(mAdapter);
}
@Override
public View getSelectedView() {
return mActiveCard;
}
@Override
public void requestLayout() {
if (!mInLayout) {
super.requestLayout();
}
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
super.onLayout(changed, left, top, right, bottom);
// if we don't have an adapter, we don't need to do anything
if (mAdapter == null) {
return;
}
mInLayout = true;
final int adapterCount = mAdapter.getCount();
if(adapterCount == 0) {
removeAllViewsInLayout();
}else {
View topCard = getChildAt(LAST_OBJECT_IN_STACK);
if(mActiveCard!=null && topCard!=null && topCard==mActiveCard) {
removeViewsInLayout(0, LAST_OBJECT_IN_STACK);
layoutChildren(1, adapterCount);
}else{
// Reset the UI and set top view listener
removeAllViewsInLayout();
layoutChildren(0, adapterCount);
setTopView();
}
}
mInLayout = false;
if(adapterCount < MAX_VISIBLE) mFlingListener.onAdapterAboutToEmpty(adapterCount);
}
private void layoutChildren(int startingIndex, int adapterCount){
while (startingIndex < Math.min(adapterCount, MAX_VISIBLE) ) {
View newUnderChild = mAdapter.getView(startingIndex, null, this);
if (newUnderChild.getVisibility() != GONE) {
makeAndAddView(newUnderChild);
LAST_OBJECT_IN_STACK = startingIndex;
}
startingIndex++;
}
}
@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
private void makeAndAddView(View child) {
FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) child.getLayoutParams();
addViewInLayout(child, 0, lp, true);
final boolean needToMeasure = child.isLayoutRequested();
if (needToMeasure) {
int childWidthSpec = getChildMeasureSpec(getWidthMeasureSpec(),
getPaddingLeft() + getPaddingRight() + lp.leftMargin + lp.rightMargin,
lp.width);
int childHeightSpec = getChildMeasureSpec(getHeightMeasureSpec(),
getPaddingTop() + getPaddingBottom() + lp.topMargin + lp.bottomMargin,
lp.height);
child.measure(childWidthSpec, childHeightSpec);
} else {
cleanupLayoutState(child);
}
int w = child.getMeasuredWidth();
int h = child.getMeasuredHeight();
int gravity = lp.gravity;
if (gravity == -1) {
gravity = Gravity.TOP | Gravity.START;
}
int layoutDirection = getLayoutDirection();
final int absoluteGravity = Gravity.getAbsoluteGravity(gravity, layoutDirection);
final int verticalGravity = gravity & Gravity.VERTICAL_GRAVITY_MASK;
int childLeft;
int childTop;
switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
case Gravity.CENTER_HORIZONTAL:
childLeft = (getWidth() + getPaddingLeft() - getPaddingRight() - w) / 2 +
lp.leftMargin - lp.rightMargin;
break;
case Gravity.END:
childLeft = getWidth() + getPaddingRight() - w - lp.rightMargin;
break;
case Gravity.START:
default:
childLeft = getPaddingLeft() + lp.leftMargin;
break;
}
switch (verticalGravity) {
case Gravity.CENTER_VERTICAL:
childTop = (getHeight() + getPaddingTop() - getPaddingBottom() - h) / 2 +
lp.topMargin - lp.bottomMargin;
break;
case Gravity.BOTTOM:
childTop = getHeight() - getPaddingBottom() - h - lp.bottomMargin;
break;
case Gravity.TOP:
default:
childTop = getPaddingTop() + lp.topMargin;
break;
}
child.layout(childLeft, childTop, childLeft + w, childTop + h);
}
/**
* Set the top view and add the fling listener
*/
private void setTopView() {
if(getChildCount()>0){
mActiveCard = getChildAt(LAST_OBJECT_IN_STACK);
if(mActiveCard!=null) {
flingCardListener = new FlingCardListener(mActiveCard, mAdapter.getItem(0),
ROTATION_DEGREES, new FlingCardListener.FlingListener() {
@Override
public void onCardExited() {
mActiveCard = null;
mFlingListener.removeFirstObjectInAdapter();
}
@Override
public void leftExit(Object dataObject) {
mFlingListener.onLeftCardExit(dataObject);
}
@Override
public void rightExit(Object dataObject) {
mFlingListener.onRightCardExit(dataObject);
}
@Override
public void onClick(Object dataObject) {
if(mOnItemClickListener!=null)
mOnItemClickListener.onItemClicked(0, dataObject);
}
@Override
public void onScroll(float scrollProgressPercent) {
mFlingListener.onScroll(scrollProgressPercent);
}
});
mActiveCard.setOnTouchListener(flingCardListener);
}
}
}
public FlingCardListener getTopCardListener() throws NullPointerException{
if(flingCardListener==null){
throw new NullPointerException();
}
return flingCardListener;
}
public void setMaxVisible(int MAX_VISIBLE){
this.MAX_VISIBLE = MAX_VISIBLE;
}
public void setMinStackInAdapter(int MIN_ADAPTER_STACK){
this.MIN_ADAPTER_STACK = MIN_ADAPTER_STACK;
}
@Override
public Adapter getAdapter() {
return mAdapter;
}
@Override
public void setAdapter(Adapter adapter) {
if (mAdapter != null && mDataSetObserver != null) {
mAdapter.unregisterDataSetObserver(mDataSetObserver);
mDataSetObserver = null;
}
mAdapter = adapter;
if (mAdapter != null && mDataSetObserver == null) {
mDataSetObserver = new AdapterDataSetObserver();
mAdapter.registerDataSetObserver(mDataSetObserver);
}
}
public void setFlingListener(onFlingListener onFlingListener) {
this.mFlingListener = onFlingListener;
}
public void setOnItemClickListener(OnItemClickListener onItemClickListener){
this.mOnItemClickListener = onItemClickListener;
}
@Override
public LayoutParams generateLayoutParams(AttributeSet attrs) {
return new FrameLayout.LayoutParams(getContext(), attrs);
}
private class AdapterDataSetObserver extends DataSetObserver {
@Override
public void onChanged() {
requestLayout();
}
@Override
public void onInvalidated() {
requestLayout();
}
}
public interface OnItemClickListener {
public void onItemClicked(int itemPosition, Object dataObject);
}
public interface onFlingListener {
public void removeFirstObjectInAdapter();
public void onLeftCardExit(Object dataObject);
public void onRightCardExit(Object dataObject);
public void onAdapterAboutToEmpty(int itemsInAdapter);
public void onScroll(float scrollProgressPercent);
}
}
我该怎么做？
答案 0 :(得分：2)
onPostExecute已在UI线程中，因此无需使用runOnUiThread进行调用。
只需编写loadstatus();而不是
runOnUiThread(new Runnable() {
public void run() {
loadstatus();
}
});
另请注意，如果您取消AsyncTask，则不会调用onPostExecute。
答案 1 :(得分：0)
您不需要在runOnUiThread方法中使用onPostExecute()。直接调用您的函数。
protected void onPostExecute(String newdt) {
// dismiss the dialog after getting all products
Dialog.dismiss();
loadstatus();
}
答案 2 :(得分：0)
你不需要在OnPostExecuste方法中使用UI线程...... 请删除runUIThread并调用loadstatus（）;方法...
答案 3 :(得分：0)
您是否遇到任何例外或错误？ 您将不得不删除该UI线程。
protected void onPostExecute(String newdt) {
// dismiss the dialog after getting all products
Dialog.dismiss();
loadstatus();
}