问题
I am using search widget as auto completed in my home screen. Auto Complete functionally is working fine but when I select any suggestion app is crashing with weird NullPointerException. I spent enough time on googling about it but could not find any clue. I am pasting the code below.
@Override
public boolean onCreateOptionsMenu(Menu menu) {
Log.e("Conversion", "OnceateOption menu started");
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu, menu);
// Get the SearchView and set the searchable configuration
SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
SearchView searchView = (SearchView) menu.findItem(R.id.menu_search).getActionView();
// This is sets our icon as search icon on title bar
ImageView searchHintIcon = (ImageView) findViewById(searchView,
"android:id/search_button");
searchHintIcon.setImageResource(R.drawable.searchicon);
// Set the hint text color
int id = searchView.getContext().getResources().getIdentifier("android:id/search_src_text", null, null);
AutoCompleteTextView searchTextView = (AutoCompleteTextView) searchView.findViewById(id);
searchTextView.setTextColor(Color.BLACK);
// Set hint in search widget
searchView.setQueryHint("Enter Conversion");
Log.e("Conversion", "Before setting auto suggestions");
// Set the auto suggestions
ArrayList<String> list = new ArrayList<String>(Arrays.asList(suggestionList));
AutoSuggestionAdapter autoSuggestionAdapter = new AutoSuggestionAdapter(this,
R.layout.autosuggestion_layout, list);
//ArrayAdapter<String> autoSuggestionAdapter = new ArrayAdapter<String>(this,
// android.R.layout.simple_dropdown_item_1line, suggestionList);
((AutoCompleteTextView) searchTextView).setAdapter(autoSuggestionAdapter);
((AutoCompleteTextView) searchTextView).setThreshold(3);
// Assumes current activity is the searchable activity
searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
searchView.setIconifiedByDefault(true); // Do not iconify the widget; expand it by default
Log.e("Conversion", "Autosuggestions set");
return true;
}
Menu item is
<item
android:id="@+id/menu_search"
android:icon="@drawable/searchicon"
android:title="@string/action_search"
android:showAsAction="always"
android:actionViewClass="android.widget.SearchView"
/>
and the exception from log is:
01-16 19:47:22.550 17995-17995/? E/AndroidRuntime: java.lang.NullPointerException
01-16 19:47:22.550 17995-17995/? E/AndroidRuntime: at android.widget.SearchView.launchSuggestion(SearchView.java:1387)
01-16 19:47:22.550 17995-17995/? E/AndroidRuntime: at android.widget.SearchView.onItemClicked(SearchView.java:1303)
01-16 19:47:22.550 17995-17995/? E/AndroidRuntime: at android.widget.SearchView.access$1800(SearchView.java:92)
01-16 19:47:22.550 17995-17995/? E/AndroidRuntime: at android.widget.SearchView$9.onItemClick(SearchView.java:1327)
01-16 19:47:22.550 17995-17995/? E/AndroidRuntime: at android.widget.AutoCompleteTextView.performCompletion(AutoCompleteTextView.java:931)
01-16 19:47:22.550 17995-17995/? E/AndroidRuntime: at android.widget.AutoCompleteTextView.access$400(AutoCompleteTextView.java:98)
01-16 19:47:22.550 17995-17995/? E/AndroidRuntime: at android.widget.AutoCompleteTextView$DropDownItemClickListener.onItemClick(AutoCompleteTextView.java:1235)
01-16 19:47:22.550 17995-17995/? E/AndroidRuntime: at android.widget.AdapterView.performItemClick(AdapterView.java:298)
01-16 19:47:22.550 17995-17995/? E/AndroidRuntime: at android.widget.AbsListView.performItemClick(AbsListView.java:1150)
01-16 19:47:22.550 17995-17995/? E/AndroidRuntime: at android.widget.ListView.performItemClick(ListView.java:4397)
01-16 19:47:22.550 17995-17995/? E/AndroidRuntime: at android.widget.AbsListView$PerformClick.run(AbsListView.java:2985)
01-16 19:47:22.550 17995-17995/? E/AndroidRuntime: at android.widget.AbsListView$1.run(AbsListView.java:3671)
01-16 19:47:22.550 17995-17995/? E/AndroidRuntime: at android.os.Handler.handleCallback(Handler.java:615)
01-16 19:47:22.550 17995-17995/? E/AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:92)
01-16 19:47:22.550 17995-17995/? E/AndroidRuntime: at android.os.Looper.loop(Looper.java:155)
01-16 19:47:22.550 17995-17995/? E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5520)
01-16 19:47:22.550 17995-17995/? E/AndroidRuntime: at java.lang.reflect.Method.invokeNative(Native Method)
01-16 19:47:22.550 17995-17995/? E/AndroidRuntime: at java.lang.reflect.Method.invoke(Method.java:511)
01-16 19:47:22.550 17995-17995/? E/AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1058)
01-16 19:47:22.550 17995-17995/? E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:825)
01-16 19:47:22.550 17995-17995/? E/AndroidRuntime: at dalvik.system.NativeStart.main(Native Method)
01-16 19:47:22.560 399-4972/? E/EmbeddedLogger: App crashed! Process: com.example.app.myapplication
But there is no possibility of getting NullPointer when I checked android class code.
private Intent createIntent(String action, Uri data, String extraData, String query,
int actionKey, String actionMsg) {
// Now build the Intent
Intent intent = new Intent(action);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
// We need CLEAR_TOP to avoid reusing an old task that has other activities
// on top of the one we want. We don't want to do this in in-app search though,
// as it can be destructive to the activity stack.
if (data != null) {
intent.setData(data);
}
intent.putExtra(SearchManager.USER_QUERY, mUserQuery);
if (query != null) {
intent.putExtra(SearchManager.QUERY, query);
}
if (extraData != null) { /**** LINE NUMBER 1387 NULL POINTER IN THIS LINE ******************/
intent.putExtra(SearchManager.EXTRA_DATA_KEY, extraData);
}
if (mAppSearchData != null) {
intent.putExtra(SearchManager.APP_DATA, mAppSearchData);
}
if (actionKey != KeyEvent.KEYCODE_UNKNOWN) {
intent.putExtra(SearchManager.ACTION_KEY, actionKey);
intent.putExtra(SearchManager.ACTION_MSG, actionMsg);
}
intent.setComponent(mSearchable.getSearchActivity());
return intent;
}
Any thoughts??
回答1:
First, the SearchView's code on your code is not that of your test device's version so the line number does not match. It should occur in launchSuggestion() method as the log says, not the createIntent() you posted.
The problem is not in the android's framework code, it crashed while processing the suggestion list provided, likely to met null data in the list.
From your code, following part is making suggestion list:
// Set the auto suggestions
ArrayList<String> list = new ArrayList<String>(Arrays.asList(suggestionList));
AutoSuggestionAdapter autoSuggestionAdapter = new AutoSuggestionAdapter(this,
R.layout.autosuggestion_layout, list);
In here, the adapter grabs data from suggestionList, but if one of its element is null it can lead to NullPointerException.
I don't know what is in suggestionList, but can be sure that it is caused by a null in it.
来源：https://stackoverflow.com/questions/34827979/android-stack-nullpointer-on-selecting-a-suggestion-in-search-widget