当我在ListView中向上和向下滚动几次时，我的应用程序崩溃了，这是由一个扩展baseAdapter的customAdapter提供的。
还有一个问题，当我向上和向下滚动时，行中的信息有时会改变位置，有时会消失，这只是
logcat的
04-02 00:30:25.390: I/System.out(4461): Not a DRM File, opening notmally
04-02 00:30:25.445: I/System.out(4461): buffer returned
04-02 00:30:25.531: I/dalvikvm-heap(4461): Forcing collection of SoftReferences for 12582928-byte allocation
04-02 00:30:25.570: E/dalvikvm-heap(4461): Out of memory on a 12582928-byte allocation.
04-02 00:30:25.570: I/dalvikvm(4461): "main" prio=5 tid=1 RUNNABLE
04-02 00:30:25.570: I/dalvikvm(4461): | group="main" sCount=0 dsCount=0 obj=0x41135508 self=0x40f0a930
04-02 00:30:25.570: I/dalvikvm(4461): | sysTid=4461 nice=0 sched=0/0 cgrp=apps handle=1074736944
04-02 00:30:25.570: I/dalvikvm(4461): | schedstat=( 11607757611 1931762655 12518 ) utm=1084 stm=75 core=1
04-02 00:30:25.570: I/dalvikvm(4461): at android.graphics.BitmapFactory.nativeDecodeStream(Native Method)
04-02 00:30:25.570: I/dalvikvm(4461): at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:619)
04-02 00:30:25.570: I/dalvikvm(4461): at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:385)
04-02 00:30:25.570: I/dalvikvm(4461): at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:418)
04-02 00:30:25.570: I/dalvikvm(4461): at com.android.moha.MainActivity$MyCustomAdapter.getView(MainActivity.java:754)
04-02 00:30:25.570: I/dalvikvm(4461): at android.widget.AbsListView.obtainView(AbsListView.java:2445)
04-02 00:30:25.570: I/dalvikvm(4461): at android.widget.ListView.makeAndAddView(ListView.java:1769)
04-02 00:30:25.570: I/dalvikvm(4461): at android.widget.ListView.fillUp(ListView.java:706)
04-02 00:30:25.570: I/dalvikvm(4461): at android.widget.ListView.fillGap(ListView.java:645)
04-02 00:30:25.570: I/dalvikvm(4461): at android.widget.AbsListView.trackMotionScroll(AbsListView.java:5530)
04-02 00:30:25.578: I/dalvikvm(4461): at android.widget.AbsListView.scrollIfNeeded(AbsListView.java:3413)
04-02 00:30:25.578: I/dalvikvm(4461): at android.widget.AbsListView.onTouchEvent(AbsListView.java:3906)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.View.dispatchTouchEvent(View.java:7340)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2179)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1914)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2185)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1928)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2185)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1928)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2185)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1928)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2185)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1928)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2185)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1928)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2185)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1928)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2185)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1928)
04-02 00:30:25.578: I/dalvikvm(4461): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2113)
04-02 00:30:25.578: I/dalvikvm(4461): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1466)
04-02 00:30:25.578: I/dalvikvm(4461): at android.app.Activity.dispatchTouchEvent(Activity.java:2468)
04-02 00:30:25.578: I/dalvikvm(4461): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2061)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.View.dispatchPointerEvent(View.java:7525)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3368)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:3300)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:4392)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:4370)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:4474)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:171)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(Native Method)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:163)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.ViewRootImpl.doConsumeBatchedInput(ViewRootImpl.java:4442)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.ViewRootImpl$ConsumeBatchedInputRunnable.run(ViewRootImpl.java:4493)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.Choreographer.doCallbacks(Choreographer.java:555)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.Choreographer.doFrame(Choreographer.java:523)
04-02 00:30:25.578: I/dalvikvm(4461): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
04-02 00:30:25.578: I/dalvikvm(4461): at android.os.Handler.handleCallback(Handler.java:615)
04-02 00:30:25.578: I/dalvikvm(4461): at android.os.Handler.dispatchMessage(Handler.java:92)
04-02 00:30:25.578: I/dalvikvm(4461): at android.os.Looper.loop(Looper.java:137)
04-02 00:30:25.578: I/dalvikvm(4461): at android.app.ActivityThread.main(ActivityThread.java:4895)
04-02 00:30:25.578: I/dalvikvm(4461): at java.lang.reflect.Method.invokeNative(Native Method)
04-02 00:30:25.578: I/dalvikvm(4461): at java.lang.reflect.Method.invoke(Method.java:511)
04-02 00:30:25.578: I/dalvikvm(4461): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:994)
04-02 00:30:25.578: I/dalvikvm(4461): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:761)
04-02 00:30:25.578: I/dalvikvm(4461): at dalvik.system.NativeStart.main(Native Method)
04-02 00:30:25.617: E/InputEventReceiver(4461): Exception dispatching input event.
CustomAdapter getView
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
System.out.println("getView " + position + " " + convertView);
final ViewHolder holder;
if (convertView == null) {
mInflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = mInflater.inflate(l, null);
holder = new ViewHolder();
holder.id = (TextView)convertView.findViewById(R.id.id);
holder.name = (TextView)convertView.findViewById(R.id.name);
holder.price = (TextView)convertView.findViewById(R.id.price);
holder.description = (TextView)convertView.findViewById(R.id.description);
holder.button = (Button) convertView.findViewById(R.id.order);
holder.quantity = (TextView) convertView.findViewById(R.id.quantity);
if (a == itemsList){
holder.img = (ImageView) convertView.findViewById(R.id.menu_icon);
}
convertView.setTag(holder);
}
else {
holder = (ViewHolder)convertView.getTag();
}
holder.id.setText(getId(getItem(position)));
holder.name.setText(getName(getItem(position)));
holder.price.setText("£ " + getPrice(getItem(position)));
holder.description.setText(getDesc(getItem(position)));
String path = getImgPath(getItem(position));
if(a==itemsList){
final String quantity = "1";
sign = "+";
if(path.equals("") || path.equals(null)){
//holder.img.setImageDrawable(defaul);
holder.img.setContentDescription("default");
}
else{
Bitmap bm = BitmapFactory.decodeFile(path);
holder.img.setImageBitmap(bm);
holder.img.setContentDescription("set");
}
holder.img.setOnClickListener(new View.OnClickListener() {
@SuppressLint("NewApi")
@Override
public void onClick(View v) {
final ImageView full = (ImageView) findViewById(R.id.fullScreen);
full.setVisibility(View.VISIBLE);
full.setEnabled(true);
full.setBackgroundColor(Color.BLACK);
full.setImageDrawable(holder.img.getDrawable());
full.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
full.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
full.setVisibility(View.GONE);
full.setEnabled(false);
return true;
}
});
}
});
holder.button.setOnClickListener(new android.view.View.OnClickListener(){
public void onClick(View v) {
//System.out.println("id" + v.getId());
//System.out.println("bid" + R.id.order);
// System.out.println("hell :" + lv.getItemAtPosition(position));
//System.out.println("hell :" + lv.getItemAtPosition(position));
HashMap<String, String> map = itemsList.get(position);
// System.out.println("items :" + lv.getAdapter().getItem(position));
//System.out.println("orders :" + orderList.toString());
if(v.getId() == R.id.order)
{
HashMap<String, String> hsh = map;
String ss = null ;
boolean done = false;
for(int i=0; orderList.size()>i; i++){
HashMap<String, String> s = orderList.get(i);
ss= s.get(TAG_ID).toString();
if ( ss.equalsIgnoreCase(getItem(position).get(TAG_ID).toString()))
{
int foo = Integer.parseInt(s.get(TAG_QUANTITY).toString());
s.put(TAG_QUANTITY,( "" + (foo+1)));
done=true;
break;
}
}
if(!done)
{
hsh.put(TAG_QUANTITY, quantity);
orderList.add(hsh);
}
//Log.d("Selected : ", orderList.toString());
// ListAdapter order = new MyCustomAdapter(1,orderList,R.layout.list_item);
// updating listview
// list1.setAdapter(order);
// list11.setAdapter(order);
((MyCustomAdapter) list1.getAdapter()).notifyDataSetChanged();
((MyCustomAdapter) list11.getAdapter()).notifyDataSetChanged();
Float fo = Float.parseFloat(map.get(TAG_PRICE).toString());
Float total = Float.parseFloat(t.getText().toString());
//System.out.println("heeeeeeeeeeeeeere :" +fo);
t.setText(""+ String.format("%.2f", (fo+total)));
totalll = Float.parseFloat(t.getText().toString());
}
}
});
}
else
{
sign = "-";
if (value == 1)
{
holder.quantity.setVisibility(View.VISIBLE);
}
ListView l = list1;
if(((Button) findViewById(R.id.handle)).isPressed())
{
l = list11;
}else{l = list1;}
final SwipeDetector swipeDetector = new SwipeDetector();
l.setOnTouchListener(swipeDetector);
l.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if (swipeDetector.swipeDetected()){
Float fo = Float.parseFloat((getItem(position).get(TAG_PRICE)).toString());
Float Quant = Float.parseFloat((getItem(position).get(TAG_QUANTITY)).toString());
Float total = Float.parseFloat(t.getText().toString());
//System.out.println("heeeeeeeeeeeeeere :" +fo);
orderList.remove(getItem(position));
t.setText(""+ String.format("%.2f", (total-(fo*Quant))));
//remove // ListAdapter order = new MyCustomAdapter(1,orderList,R.layout.list_item);
//remove // list1.setAdapter(order);
//remove // list11.setAdapter(order);
((MyCustomAdapter) list1.getAdapter()).notifyDataSetChanged();
((MyCustomAdapter) list11.getAdapter()).notifyDataSetChanged();
}
}
});
holder.button.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
// System.out.println("id " + v.getId());
// System.out.println("bid " + R.id.order);
HashMap<String, String> map = getItem(position);
if(v.getId() == R.id.order)
{
if ( orderList.contains(getItem(position)) ){
System.out.println("item :" +getItem(position));
//holder.quantity.setText("q");
int foo = Integer.parseInt(map.get(TAG_QUANTITY).toString());
map.put(TAG_QUANTITY, "" + (foo-1));
if((foo-1)==0)
{
orderList.remove(getItem(position));
}
}
// ListAdapter order = new MyCustomAdapter(1,orderList,R.layout.list_item);
// updating listview
// list1.setAdapter(order);
// list11.setAdapter(order);
((MyCustomAdapter) list1.getAdapter()).notifyDataSetChanged();
((MyCustomAdapter) list11.getAdapter()).notifyDataSetChanged();
Float fo = Float.parseFloat(map.get(TAG_PRICE).toString());
Float total = Float.parseFloat(t.getText().toString());
//System.out.println("heeeeeeeeeeeeeere :" +fo);
t.setText(""+ String.format("%.2f", (total-fo)));
}
}
});
holder.button.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
Float fo = Float.parseFloat((getItem(position).get(TAG_PRICE)).toString());
Float Quant = Float.parseFloat((getItem(position).get(TAG_QUANTITY)).toString());
Float total = Float.parseFloat(t.getText().toString());
//System.out.println("heeeeeeeeeeeeeere :" +fo);
orderList.remove(getItem(position));
t.setText(""+ String.format("%.2f", (total-(fo*Quant))));
((MyCustomAdapter) list1.getAdapter()).notifyDataSetChanged();
((MyCustomAdapter) list11.getAdapter()).notifyDataSetChanged();
return false;
}
});
}
if(a==orderList){holder.quantity.setText(getQuant(getItem(position)));}
if(sign=="-"){holder.button.setText(sign);}
return convertView;
}
答案 0 :(得分：0)
确保在持有人设置数据时涵盖所有信息案例，
我的意思是，如果第一项在数据行上没有“描述”，那么你向下滚动然后向上这个项目将从其他行设置“描述”。
只需在holder ==null＆amp;当holder !=null时，检查每个项目是否有值，如果没有设置默认值。
我希望答案可以帮助你