我在ListView片段中有三个TextViews组成的自定义ViewPager，我正在尝试使TextViews中的文本可选。当我在XML中设置isSelectable=true属性时，屏幕顶部的选择文本栏会显示片刻并消失。发生这种情况时，Android Monitor的输出是：
D / dalvikvm：GC_FOR_ALLOC释放2326K，21％免费20756K / 26252K，暂停 46毫秒，总计46毫秒我/编舞：跳过37帧！应用程序 可能在其主线上做了太多工作。
这是布局文件：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/relativeLayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingBottom="10dp"
android:paddingLeft="10dp"
android:paddingRight="2dp"
android:paddingTop="10dp">
<TextView
android:id="@+id/call_dt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:textIsSelectable="true"
/>
<TextView
android:id="@+id/call_tm"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerInParent="true"
android:layout_toRightOf="@+id/call_dt"
android:textIsSelectable="false"
android:paddingBottom="3dp"
android:paddingLeft="5dp"
android:textColorLink="@android:color/holo_blue_dark"
/>
<TextView
android:id="@+id/call_notes"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_below="@+id/call_dt"
android:textIsSelectable="false"
android:paddingBottom="3dp"
android:text="New Text" />
</RelativeLayout>
以下是带有自定义ListView适配器的片段：
/**
* Created by Steve on 7/14/2016.
*/
public class EmailAccountsFragment extends Fragment {
private ArrayList resultsListItems;
private ListView listView;
public static EmailAccountsFragment newInstance(int sectionNumber) {
EmailAccountsFragment fragment = new EmailAccountsFragment();
return fragment;
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragments_list, container, false);
return rootView;
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
listView = (ListView) view.findViewById(R.id.frag_list);
resultsListItems = (ArrayList) ResultsAccess.getEmailAcctResultsList();
EmailAcctAdapter mAdapter = new EmailAcctAdapter(EmailAccountsFragment.this.getContext(), R.layout.email_accts_item, resultsListItems);
listView.setAdapter(mAdapter);
}
class EmailAcctAdapter extends ArrayAdapter<Result> {
private Context mContext;
public EmailAcctAdapter(Context context, int textViewResourceId, List<Result> objects) {
super(context, textViewResourceId, objects);
mContext = context;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
return getViewOptimize(position, convertView, parent);
}
public View getViewOptimize(int position, View convertView, ViewGroup parent) {
Result result = getItem(position);
View row = convertView;
ViewHolder viewHolder = null;
if (row == null) {
LayoutInflater inflater = (LayoutInflater)
mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.email_accts_item, parent, false);
viewHolder = new ViewHolder();
viewHolder.altEmail = (TextView) row.findViewById(R.id.alt_email);
viewHolder.os_account = (TextView) row.findViewById(R.id.os_account);
viewHolder.milasodit = (TextView) row.findViewById(R.id.milasodit);
viewHolder.start_dt = (TextView) row.findViewById(R.id.start_dt);
viewHolder.end_dt = (TextView) row.findViewById(R.id.end_dt);
viewHolder.spamblock_yn = (TextView) row.findViewById(R.id.spamblock_yn);
viewHolder.spamnotify_yn = (TextView) row.findViewById(R.id.spamnotify_yn);
row.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) row.getTag();
}
setTextViewsText(viewHolder, result);
return row;
}
class ViewHolder {
public TextView altEmail,
os_account,
milasodit,
start_dt,
end_dt,
spamblock_yn,
spamnotify_yn;
}
public void setTextViewsText(ViewHolder v, Result r) {
if (notNull(r.altEmail)) {
v.altEmail.setText(r.altEmail);
v.altEmail.setVisibility(View.VISIBLE);
} else {
v.altEmail.setVisibility(View.GONE);
}
if (notNull(r.os_account)) {
v.os_account.setText("Account: " + r.os_account);
v.os_account.setVisibility(View.VISIBLE);
} else {
v.os_account.setVisibility(View.GONE);
}
if (notNull(r.milasodit)) {
String slash = r.os_account == null ? "" : "/";
v.milasodit.setText(slash + r.milasodit);
v.milasodit.setVisibility(View.VISIBLE);
} else {
v.milasodit.setVisibility(View.GONE);
}
if (notNull(r.start_dt)) {
v.start_dt.setText("Start: " + r.start_dt);
v.start_dt.setVisibility(View.VISIBLE);
} else {
v.start_dt.setVisibility(View.GONE);
}
if (notNull(r.end_dt)) {
v.end_dt.setText("End: " + r.end_dt);
v.end_dt.setVisibility(View.VISIBLE);
} else {
v.end_dt.setVisibility(View.GONE);
}
if (notNull(r.spamblock_yn)) {
v.spamblock_yn.setText("SpamBlock: " + r.spamblock_yn);
v.spamblock_yn.setVisibility(View.VISIBLE);
} else {
v.spamblock_yn.setVisibility(View.GONE);
}
if (notNull(r.spamnotify_yn)) {
v.spamnotify_yn.setText("SpamNotify: " + r.spamnotify_yn);
v.spamblock_yn.setVisibility(View.VISIBLE);
} else {
v.spamnotify_yn.setVisibility(View.GONE);
}
}
private boolean notNull(String field) {
return field != null;
}
}
}
我在另一个标签/片段中也有类似的ListView。第三个片段只有3个TextView，没有ListView，选择工作。我在实施中使用了太多内存，还是另一个问题？如果是这样，我怎样才能更好地实现这个？