您好，我需要在 Android 应用的 Listview 中管理大量数据。列表项可能大约有 250 个或更多。现在我的问题是，当我滚动 ListView 时，它会由于更多项目而使应用程序崩溃。但当项目少于 100 时， ListView 将正常工作。
请帮我解决这个问题。
这是我的错误日志。
02-13 06:43:07.320: ERROR/AndroidRuntime(1776): Caused by: java.lang.OutOfMemoryError
android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:577)
android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:445)
android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:738)
android.content.res.Resources.loadDrawable(Resources.java:1869)
android.content.res.Resources.getDrawable(Resources.java:659)
android.widget.ScrollView.setOverScrollMode(ScrollView.java:1487)
android.view.ViewGroup.<init>(ViewGroup.java:365)
android.widget.FrameLayout.<init>(FrameLayout.java:94)
android.widget.ScrollView.<init>(ScrollView.java:155)
android.widget.ScrollView.<init>(ScrollView.java:151)
而我的 getView() 是
@Override
public View getView(final int position, View view, ViewGroup parent) {
final int pos = position;
views = null;
LayoutInflater layoutInflator = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
views = (RelativeLayout) layoutInflator.inflate(
R.layout.guest_list_item, null);
final CheckBox chk = (CheckBox) views.getChildAt(0);
// Log.d("", "CheckBox Pos "+position);
chk.setId(position);
TextView txtView = (TextView) views.getChildAt(1);
TextView txtView2 = (TextView) views.getChildAt(2);
TextView txtView3 = (TextView) views.getChildAt(3);
final TextView txtView4 = (TextView) views.getChildAt(4);
TextView txtView5 = (TextView) views.getChildAt(6);
txtView5.setId(position);
// Log.d("", "Button Pos "+position);
txtView4.setId(position);
txtView4.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(context, InfoScreen.class);
intent.putExtra("IDVALUE", arTempId.get(txtView4.getId()));
intent.putExtra("IDVALUE", arrayListId.get(position));
intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
context.startActivity(intent);
// System.out.println(v + "##########" + " " + v.getId());
// System.out.println(v + "##########" + " " +
// arTempId.get(txtView4.getId()));
// System.out.println(v + "##########" + " " +
// chickinlist.get(txtView4.getId()));
}
});
Log.e("", "****************************************************** ");
// Log.v("", "Adapter arr pos " + pos);
// Log.v("", "Adapter arr position " + position);
Log.v("", "Adapter arr size " + arrayListFirstName.size());
Log.v("", "Passsing arr size " + chickinlist.size());
for (int dd = 0; dd < arrayListFirstName.size(); dd++) {
if (position == dd) {
// Log.d("", "Passsing arr size " + chickinlist.size());
Boolean result = chickinlist.get(position);
// Log.d("", "After " + result);
if (result == true) {
chk.setChecked(true);
arrCheckedItems.add(position);
views.setBackgroundResource(R.drawable.list_item_checked);
} else {
chk.setChecked(false);
arrUnCheckedItems.add(position);
views.setBackgroundResource(R.drawable.list_item_unchecked);
}
txtView.setText(arrayListFirstName.get(position));
txtView2.setText(arrayListLastName.get(position));
txtView3.setText("(" + arrayListGuests.get(position) + ")");
if (arrayCustomOne.get(position).equalsIgnoreCase("0")
|| arrayCustomOne.get(position).equalsIgnoreCase(null)
|| arrayCustomOne.get(position).equalsIgnoreCase(
"(null)")) {
txtView5.setText("");
} else {
txtView5.setText(arrayCustomOne.get(position));
}
}
}
chk.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
mySqliteAdapter.openToWrite();
sId = arrayListId.get(chk.getId());
// Log.d("Adapter",
// "Checked Temp Id "+arTempId.get(chk.getId()));
Log.d("",
"Position " + chk.getId() + "tempid "
+ arTempId.get(chk.getId()));
if (isChecked) {
chk.setChecked(true);
arrCheckedItems.add(position);
strAlertValue = "1";
sCheckIn = "1";
strExe = "update ticket_details set checkin_status=1 where tempid="
+ arTempId.get(chk.getId());
mySqliteAdapter.executeCheckQurey(strExe);
if (Util.getInstance(context).isTabletDevice()) {
buttonView
.setBackgroundResource(R.drawable.tablet_list_item_check);
} else {
buttonView
.setBackgroundResource(R.drawable.list_item_checked);
}
new CheckInUpdate().execute();
AlertDialog.Builder builder = new AlertDialog.Builder(
context);
builder.create();
builder.setMessage(arrayListFirstName.get(chk.getId())
+ " " + arrayListLastName.get(chk.getId())
+ " has been checked in.");
builder.setPositiveButton("Ok",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
// myGuestList = new GuestListScreen();
//
// // myGuestList.ListUpdate();
//Intent intentNavGuestList = new Intent(
//context, GuestListScreen.class);
//intentNavGuestList
// .addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
//context.startActivity(intentNavGuestList);
dialog.dismiss();
}
}).show();
// Log.d("", "ID = " + buttonView.getId());
}
if (!isChecked) {
sCheckIn = "0";
strAlertValue = "0";
// views.setBackgroundResource(R.drawable.list_item_unchecked);
strExe = "update ticket_details set checkin_status=0 where tempid="
+ arTempId.get(chk.getId());
mySqliteAdapter.executeCheckQurey(strExe);
if (Util.getInstance(context).isTabletDevice()) {
buttonView
.setBackgroundResource(R.drawable.tablet_list_item_uncheck);
} else {
buttonView
.setBackgroundResource(R.drawable.list_item_unchecked);
}
new CheckInUpdate().execute();
Intent intentNavGuestList = new Intent(context,
GuestListScreen.class);
intentNavGuestList
.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
context.startActivity(intentNavGuestList);
// Toast.makeText(context, "check release",
// Toast.LENGTH_SHORT)
// .show();
// new CheckInUpdate().execute();
}
}
});
return views;
}
最佳答案
Holder 模式是一个正确的答案。如果你为 ListView 实现“分页”模式会更好。当 ListView 滚动到结束时显示下一个项目。还要避免在 Adapter 中执行长时间运行的任务。将数据和适配器分开。请参阅使用 notifyDataSetChanged() 方法。
关于android - ListView 中的大量数据导致 Android 应用程序崩溃，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/14847714/