I have a listview of installed apps with a custom baseadapter class.
I am attempting to add the searchview function when I press the search icon so an edittext pops up to filter which apps I want to search for.
I am aiming for something like this:
I keep on producing a nullpointer exception for my searchview; however, I believe my xml and java implementation is correct.
I have done much research on the subject and still no luck.
NullPointer Exception While Doing Search Feature for ListView With BaseAdapter
How to add a SearchWidget to the ActionBar?
Android SearchView Filter ListView
No matter what I do I produce a nullpointer exception in some way or another.
This is where it is produced.
SearchView searchView; //this is what is null. This is in my blockactivity fragment class.
searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
Here is my full baseadapter class:
package com.ibc.android.demo.appslist.app;
import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.graphics.Typeface;
import android.graphics.drawable.Drawable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.Filterable;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.Filter;
import com.spicycurryman.getdisciplined10.app.R;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
//
public class ApkAdapter extends BaseAdapter implements Filterable {
//Pastebin link: http://pastebin.com/LGRicg4U , http://pastebin.com/c4WfmhMK , http://pastebin.com/gFuuM4dY, http://pastebin.com/4Q7EP9G4
// http://pastebin.com/Te2g072w, http://pastebin.com/NLT5iUiA ,
SharedPreferences sharedPrefs;
SharedPreferences sharedPrefsapp;
List<PackageInfo> packageList;
TextView appnamestyle;
Activity context;
PackageManager packageManager;
boolean[] itemChecked;
HashSet checked;
Filter mFilter;
String PACKAGE_NAME;
TextView appname;
public ApkAdapter(Activity context, List<PackageInfo> packageList,
PackageManager packageManager) {
super();
this.context = context;
this.packageList = packageList;
this.packageManager = packageManager;
itemChecked = new boolean[packageList.size()];
}
private class ViewHolder {
TextView apkName;
CheckBox ck1;
TextView packageName;
}
public int getCount() {
return packageList.size();
}
public Object getItem(int position) {
return packageList.get(position);
}
public long getItemId(int position) {
return 0;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
LayoutInflater inflater = context.getLayoutInflater();
if (convertView == null) {
convertView = inflater.inflate(R.layout.installed_apps, null);
holder = new ViewHolder();
holder.apkName = (TextView) convertView
.findViewById(R.id.appname);
holder.apkName.setTypeface(Typeface.createFromAsset(context.getAssets(), "fonts/raleway-medium.otf"));
holder.ck1= (CheckBox)convertView
.findViewById(R.id.checkBox1);
holder.packageName = (TextView) convertView.findViewById(R.id.app_package);
convertView.setTag(holder);
//holder.ck1.setTag(packageList.get(position));
} else {
holder = (ViewHolder) convertView.getTag();
}
// ViewHolder holder = (ViewHolder) convertView.getTag();
final PackageInfo packageInfo = (PackageInfo) getItem(position);
Drawable appIcon = packageManager
.getApplicationIcon(packageInfo.applicationInfo);
// Make sure to define it again!
PACKAGE_NAME = packageInfo.packageName;
final String appName = packageManager.getApplicationLabel(
packageInfo.applicationInfo).toString();
appIcon.setBounds(0, 0, 80, 80);
holder.apkName.setCompoundDrawables(appIcon, null, null, null);
holder.apkName.setCompoundDrawablePadding(15);
holder.apkName.setText(appName);
//holder.packageName.setText(PACKAGE_NAME);
holder.ck1.setChecked(false);
if (itemChecked[position])
holder.ck1.setChecked(true);
else
holder.ck1.setChecked(false);
// CHANGE UP EVERYTHING! MAKE THIS SHIT WORK, TIGGA!
checked = new HashSet();
PACKAGE_NAME = packageInfo.packageName;
//Log.d("just here: ", PACKAGE_NAME);
sharedPrefs = context.getSharedPreferences(context.getApplicationContext().getPackageName(), Context.MODE_PRIVATE);
sharedPrefsapp = context.getSharedPreferences("appdb", Context.MODE_PRIVATE);
holder.ck1.setChecked(sharedPrefs.getBoolean(PACKAGE_NAME,false));
holder.ck1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
SharedPreferences.Editor editor = context.getSharedPreferences(context.getApplicationContext().getPackageName(), Context.MODE_PRIVATE).edit();
SharedPreferences.Editor editorapp = context.getSharedPreferences("appdb", Context.MODE_PRIVATE).edit();
if (holder.ck1.isChecked()) {
itemChecked[position] = true;
holder.ck1.setChecked(true);
editor.putBoolean(packageInfo.packageName, true);
editorapp.putString(packageInfo.packageName, packageInfo.packageName);
editor.apply();
editorapp.apply();
// sharedPrefs = context.getSharedPreferences(context.getApplicationContext().getPackageName(), Context.MODE_PRIVATE);
} else {
itemChecked[position] = false;
holder.ck1.setChecked(false);
editor.putBoolean(packageInfo.packageName, false);
editorapp.remove(packageInfo.packageName);
editor.apply();
editorapp.apply();
//sharedPrefs = context.getSharedPreferences(context.getApplicationContext().getPackageName(), Context.MODE_PRIVATE);
}
}
});
return convertView;
}
@Override
public Filter getFilter() {
if (mFilter == null) {
mFilter = new ItemsFilter();
}
return mFilter;
}
private class ItemsFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence prefix) {
// TODO Auto-generated method stub
List<PackageInfo> packageList_2 = packageList;
String prefixString = prefix.toString().toLowerCase();
FilterResults results = new FilterResults();
ArrayList<PackageInfo> FilteredList = new ArrayList<PackageInfo>();
if (prefix == null || prefix.length() == 0) {
results.values = packageList_2;
results.count = packageList_2.size();
return results;
}
for (int i = 0; i < packageList_2.size(); i++) {
String filterText = prefix.toString().toLowerCase();
try {
PackageInfo data = packageList_2.get(i);
if (data.applicationInfo
.loadLabel(context.getApplicationContext().getPackageManager())
.toString().toLowerCase().contains(filterText)) {
FilteredList.add(data);
} else if (data.packageName.contains(filterText)) {
FilteredList.add(data);
}
} catch (Exception e) {
Toast.makeText(context.getApplicationContext(),
"exception e" + e.toString(),
Toast.LENGTH_SHORT).show();
}
}
results.values = FilteredList;
results.count = FilteredList.size();
return results;
}
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
Toast.makeText(context.getApplicationContext(),"result-0 "+results.count,
Toast.LENGTH_SHORT).show();
packageList = (List<PackageInfo>) results.values;
notifyDataSetChanged();
}
}
}
Here is my blockactivity fragment class pay attention to the oncreateoptionmenu method:
package com.spicycurryman.getdisciplined10.app;
import android.annotation.TargetApi;
import android.app.ActionBar;
import android.app.FragmentTransaction;
import android.app.SearchManager;
import android.content.Context;
import android.content.pm.ActivityInfo;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.support.v7.app.ActionBarActivity;
import android.text.Spannable;
import android.text.SpannableString;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.SearchView;
import com.ibc.android.demo.appslist.app.ApkAdapter;
import info.androidhive.tabsswipe.adapter.TabsPagerAdapter;
// Find out about the default file template warning
/**
* Created by Spicycurryman on 6/17/14.
*/
public class BlockActivity extends ActionBarActivity implements
ActionBar.TabListener, SearchView.OnQueryTextListener {
private ViewPager viewPager;
private TabsPagerAdapter mAdapter;
private ActionBar actionBar;
ApkAdapter mAppAdapter;
SearchManager searchManager;
SearchView searchView;
// Tab titles
private String[] tabs = {"Installed Apps"};
@TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
@Override
protected void onCreate(Bundle savedInstanceState) {
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
super.onCreate(savedInstanceState);
setTheme(R.style.Theme_Light_appalled);
SpannableString s = new SpannableString("GetDisciplined");
s.setSpan(new TypefaceSpan(this, "roboto-lightitalic.ttf.ttf"), 0, s.length(),
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
// Update the action bar title with the TypefaceSpan instance
ActionBar actionBar = getActionBar();
actionBar.setTitle(s);
setContentView(R.layout.block_apps);
// Initilization
viewPager = (ViewPager) findViewById(R.id.pager);
actionBar = getActionBar();
mAdapter = new TabsPagerAdapter(getSupportFragmentManager());
viewPager.setAdapter(mAdapter);
actionBar.setHomeButtonEnabled(false);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Adding Tabs
for (String tab_name : tabs) {
actionBar.addTab(actionBar.newTab().setText(tab_name)
.setTabListener(this));
}
/**
* on swiping the viewpager make respective tab selected
* */
final ActionBar finalActionBar = actionBar;
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageSelected(int position) {
// on changing the page
// make respected tab selected
finalActionBar.setSelectedNavigationItem(position);
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public void onPageScrollStateChanged(int arg0) {
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.block, menu);
searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
searchView = (SearchView) menu.findItem(R.id.action_search).getActionView();
searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
if (!isLoading()) {
mAppAdapter.getFilter().filter(query);
}
return true;
}
private boolean isLoading() {
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
if (!isLoading()) {
if (newText.equals("")) {
mAppAdapter.getFilter().filter("");
}
}
return true;
}
});
return false;
}
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
return super.onPrepareOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
switch (item.getItemId())
{
case android.R.id.home:
onBackPressed();
break;
default:
return super.onOptionsItemSelected(item);
}
return true;
}
@Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
viewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
@Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
@Override
public boolean onQueryTextSubmit(String s) {
return false;
}
@Override
public boolean onQueryTextChange(String s) {
return false;
}
}
Here is my block.menu xml file
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
tools:context=".BlockActivity" >
<item android:id="@+id/action_search"
android:title="@string/search"
android:orderInCategory="100"
android:icon="@drawable/ic_action_search"
app:showAsAction="always|collapseActionView"
android:actionViewClass="android.widget.SearchView"
android:actionLayout="@layout/layout_search"
/>
</menu>
And here is my layout search:
<?xml version="1.0" encoding="utf-8"?>
<EditText xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:cursorVisible="true"
android:hint="@string/hint"
android:imeOptions="actionDone"
android:inputType="text"
android:textColor="@android:color/white"
android:textCursorDrawable="@android:color/white" />
Please let me know if I can clarify anything. Had to include all this code for proper context. I am just trying to get my listview search filter working properly for my baseadapter listview but the nullpointer exception gets in my way persistently.
Now I am getting a null pointer exception here:
Process: com.spicycurryman.getdisciplined10.app.dev, PID: 1453
java.lang.NullPointerException
at com.spicycurryman.getdisciplined10.app.BlockActivity$2.onQueryTextChange(BlockActivity.java:128)
public boolean onQueryTextSubmit(String query) {
if (!isLoading()) {
mAppAdapter.getFilter().filter(query); //over here
}
return true;
}
Does anything know how to properly define mAppAdapter?
