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我正在使用搜索窗口小部件在我的主屏幕中自动完成。自动完成功能工作正常，但是当我选择任何建议应用程序崩溃与奇怪的NullPointerException。我花了足够的时间在Google上搜索，但无法找到任何线索。我正在粘贴下面的代码。Android Stack NullPointer在搜索窗口小部件中选择建议
@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;
}
菜单项是
<item
android:id="@+id/menu_search"
android:icon="@drawable/searchicon"
android:title="@string/action_search"
android:showAsAction="always"
android:actionViewClass="android.widget.SearchView"
/>
，并从日志中的例外是：
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
但没有得到空指针，当我检查Android类代码的可能性。
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;
}
有什么想法？
@Henry NullPointer进入Android框架类 –
我想你的'AutoSuggestionAdapter'返回null的东西。你的'建议列表'中有什么？要进行调试，您可以下载Android版本的源代码，并直接检查“SearchView.java”文件。 – Riaz
Riaz我贴上了SearchView方法。在该行中不可能获得空指针。 –