I have a simple list view with adapter.
I create 10+ listviewitems dynamically. Then I scroll up and down again and again and again....
I can see that available memory keeps going down...
Where do I need to free and what?
Note - there is an imageview - but in my test I have not used any images so it is View.GONE.
Also - with which tool can I profile the memory usage on the android. I have found yourKit,but how do I configure it for the android (I run the application on the device)/
The Activity class
package org.BJ.Food4All.Activities.NewRecipe;
import org.BJ.Food4All.R;
import org.BJ.Food4All.Recipe;
import org.BJ.Food4All.Recipe.Instruction;
import org.BJ.Food4All.Activities.RecipeBook.RecipeInstructionsListViewAdapter;
import org.BJ.Food4All.Activities.RecipeBook.SharedData;
import org.BJ.Food4All.utils.CameraUtil;
import org.BJ.Food4All.utils.ImageUploadItem;
import android.app.ListActivity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.util.Log;
import android.view.ContextMenu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.EditText;
public class Instructions extends ListActivity implements OnClickListener
{
private final static String mTAG = "Instructions";
private EditText mInstructionEditText = null;
private RecipeInstructionsListViewAdapter mListViewAdapter = null;
private Recipe mEditRecipe = PrivateResources.GetRecipe();
private CameraUtil mCameraUtil = new CameraUtil(this);
private int mSelectedEntryIndex = -1;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.new_recipe_instruction_tab);
mInstructionEditText = (EditText)findViewById(R.id.newRecipeInstructionEditTextId);
View addInstructionButton = findViewById(R.id.naddInstructionButtonId);
// Sanity check
if(mInstructionEditText == null || addInstructionButton == null)
{
Log.e(mTAG, "NULL pointers");
// secure exit
finish();
}
// Set up click listeners for all the buttons
addInstructionButton.setOnClickListener(this);
mListViewAdapter = new RecipeInstructionsListViewAdapter(this, R.layout.recipes_instruction_list_single_view_entry, mEditRecipe.GetInstructions());
setListAdapter(mListViewAdapter);
registerForContextMenu(getListView());
}
public void onClick(View v)
{
switch(v.getId())
{
case R.id.naddInstructionButtonId:
AddInstructionToRecipe(v);
break;
default:
Log.e(mTAG, "Invalid ID:" + v.getId());
// secure exit
finish();
}
}
private void AddInstructionToRecipe(View v)
{
String instructionText = mInstructionEditText.getText().toString();
if(instructionText == null)
{
return;
}
Instruction newInstruction = new Instruction( mEditRecipe.GetInstructions().size() + 1, // Index
instructionText, // The instruction
null,
true);
if( mEditRecipe.AddInstruction(newInstruction) != true)
{
// TODO - ERROR
}
else
{
mListViewAdapter.notifyDataSetChanged();
}
}
/*
* (non-Javadoc)
* #see android.app.Activity#onCreateContextMenu(android.view.ContextMenu, android.view.View, android.view.ContextMenu.ContextMenuInfo)
*/
#Override
public void onCreateContextMenu(ContextMenu menu,
View v,
ContextMenuInfo menuInfo)
{
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.instructions_ctx_menu, menu);
super.onCreateContextMenu(menu, v, menuInfo);
}
/*
* (non-Javadoc)
* #see android.app.Activity#onContextItemSelected(android.view.MenuItem)
*/
#Override
public boolean onContextItemSelected(MenuItem item)
{
super.onContextItemSelected(item);
AdapterView.AdapterContextMenuInfo menuInfo;
menuInfo = (AdapterView.AdapterContextMenuInfo)item.getMenuInfo();
mSelectedEntryIndex = menuInfo.position;
switch(item.getItemId())
{
case R.id.deleteId:
mEditRecipe.RemoveInstruction(mSelectedEntryIndex);
mListViewAdapter.notifyDataSetChanged();
return true;
case R.id.takePictureId:
mCameraUtil.TakePicture();
return true;
}
return false;
}
/*
* (non-Javadoc)
* #see android.app.Activity#onActivityResult(int, int, android.content.Intent)
*/
#Override
protected void onActivityResult(int requestCode,
int resultCode,
Intent data)
{
// String imageLocation = mCameraUtil.onActivityResult(requestCode, resultCode, data);
Bitmap imageBitmap = mCameraUtil.onActivityResult(requestCode, resultCode, data);
// TODO - switch to parameter passed in the intent!!!! like TakePicture(index);
// mEditRecipe.GetInstructions().get( mSelectedEntryIndex ).SetBitmap( imageBitmap ); //SetInstructionImageLocation(imageLocation);
mSelectedEntryIndex = -1;
// Update the listviewitem with the picture
mListViewAdapter.notifyDataSetChanged();
}
}
The adapter class
package org.BJ.Food4All.Activities.RecipeBook;
import java.util.ArrayList;
import org.BJ.Food4All.R;
import org.BJ.Food4All.Recipe.Instruction;
import org.BJ.Food4All.utils.GlobalDefs;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Color;
import android.graphics.Typeface;
import android.net.Uri;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
public class RecipeInstructionsListViewAdapter extends ArrayAdapter<Instruction>
{
private Context mContext;
private ArrayList<Instruction> mItems;
private LayoutInflater mInflater;
public RecipeInstructionsListViewAdapter(Context context, int textViewResourceId, ArrayList<Instruction>items)
{
super(context, textViewResourceId, items);
mContext = context;
mItems = items;
mInflater = (LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public View getView(int position,
View convertView,
ViewGroup parent)
{
ViewHolder holder = new ViewHolder();
if (convertView == null)
{
convertView = mInflater.inflate(R.layout.recipes_instruction_list_single_view_entry, null);
}
if(super.getItem(position) != null)
{
holder.instructionIndex = (TextView) convertView.findViewById( R.id.listUp_RecipeInstructionNumberTextBoxId);
holder.instructionText = (TextView) convertView.findViewById( R.id.listUp_RecipeInstructionTextTextBoxId);
holder.instructionImage = (ImageView)convertView.findViewById( R.id.listUp_RecipeInstructionImageViewId);
Typeface tf = Typeface.createFromAsset(mContext.getAssets(), "Eras_Bold.ttf");
holder.instructionIndex.setTypeface(tf);
holder.instructionIndex.setTextSize(30);
holder.instructionIndex.setTextColor(GlobalDefs.GetHeadlineColor());
holder.instructionIndex.setText( Integer.toString(mItems.get(position).getIndex()));
tf = Typeface.createFromAsset(mContext.getAssets(), "Arial.ttf");
holder.instructionText.setTypeface(tf);
holder.instructionText.setTextSize(14);
holder.instructionText.setTextColor(Color.BLACK);
holder.instructionText.setText(mItems.get(position).getText());
Bitmap imageBitmap = mItems.get(position).GetBitmap();
// String imageLocation = mItems.get(position).GetInstructionImageLocation();
if(imageBitmap != null)
{
holder.instructionImage.setImageBitmap(imageBitmap);// setImageURI( Uri.parse(imageLocation ));
holder.instructionImage.setVisibility(View.VISIBLE);
}
else
{
holder.instructionImage.setVisibility(View.GONE);
}
convertView.setTag(holder);
convertView.setLayoutParams(new ListView.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
}
else
{
}
return convertView;
}
#Override
public boolean isEnabled(int position)
{
return true;
}
static class ViewHolder
{
TextView instructionIndex;
TextView instructionText;
ImageView instructionImage;
}
}
I'm not sure if it is correct to classify this as a bug, but every time you use Typeface.createFromAsset if creates a new font asset and does not release it. See this.
What you can do is load the typefaces when you load your app and reference them statically. I put my typefaces in Application.
public class YourApp extends android.app.Application {
public void onCreate() {
super.onCreate();
// typeface caching
initializeTypefaces();
}
public static class Fonts {
public static Typeface THEOREM;
}
private void initializeTypefaces(){
Fonts.THEOREM = Typeface.createFromAsset(getAssets(), "fonts/theorem.otf");
}
}
And then I do this in my adapter:
textView.setTypeface(YourApp.Fonts.THEOREM);
You can go here to see how to use Application in Android.
Lastly, it looks like your still creating your ViewHolder every time instead of only when convertView is null. I would review this video to get the whole picture. http://www.google.com/events/io/2010/sessions/world-of-listview-android.html
Here is an example of how I use the ViewHolder method:
#Override
public View getView(int pos, View convertView, ViewGroup parent) {
ViewHolder holder;
if(convertView == null || convertView.getTag() == null){
convertView = inflater.inflate(R.layout.list_item, parent, false);
holder = new ViewHolder();
holder.text1 = (TextView)convertView.findViewById(R.id.list_item_text1);
holder.text2 = (TextView)convertView.findViewById(R.id.list_item_text2);
holder.text1.setTypeface(YourApp.Fonts.THEOREM); // only happens once when recycling!
convertView.setTag(holder);
}else{
holder = (ViewHolder) convertView.getTag();
}
holder.text1.setText("someText");
holder.text2.setText("someText");
return convertView;
}
You can try to free the resources if convertView != null. if it is you could find your Views and null them. You could also try to get the Bitmap of your ImageView and recycle it.
you could also add your ViewHolder as a member to your RecipeInstructionsListViewAdapter and instantiate it once in constructor.
Related
I am trying to create a grid view that loads images using an adapter.
I used Universal Image Loader for this purpose. When I run this, I get the error, "java.lang.IllegalStateException: Same jobid in systemuid."
I am unable to figure out as to what is the reason for this error. I am new to android development. Thanks in advance!
GridImageAdapter.java
package com.example.android.tabswithswipes.Utils;
import android.content.Context;
import android.graphics.Bitmap;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ProgressBar;
import com.example.android.tabswithswipes.R;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.assist.FailReason;
import com.nostra13.universalimageloader.core.listener.ImageLoadingListener;
import java.util.ArrayList;
/**
* Created by Chaitanya Shiva on 12-05-2018.
*/
public class GridImageAdapter extends ArrayAdapter<String>{
private Context mContext;
private LayoutInflater mInflater;
private int layoutResource;
private String mAppend;
private ArrayList<String> imgURLs;
public GridImageAdapter(Context context, int layoutResource, String append, ArrayList<String> imgURLs) {
super(context, layoutResource, imgURLs);
mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
mContext = context;
this.layoutResource = layoutResource;
mAppend = append;
this.imgURLs = imgURLs;
}
private static class ViewHolder{
ImageView image;
ProgressBar mProgressBar;
}
#NonNull
#Override
public View getView(int position, #Nullable View convertView, #NonNull ViewGroup parent) {
/*
Viewholder build pattern (Similar to recyclerview)
*/
final ViewHolder holder;
if(convertView == null){
convertView = mInflater.inflate(layoutResource, parent, false);
holder = new ViewHolder();
holder.mProgressBar = (ProgressBar) convertView.findViewById(R.id.gridImageProgressBar);
holder.image = (ImageView) convertView.findViewById(R.id.gridImageView);
convertView.setTag(holder);
}
else{
holder = (ViewHolder) convertView.getTag();
}
String imgURL = getItem(position);
ImageLoader imageLoader = ImageLoader.getInstance();
imageLoader.displayImage(mAppend + imgURL, holder.image, new ImageLoadingListener() {
#Override
public void onLoadingStarted(String imageUri, View view) {
if(holder.mProgressBar != null){
holder.mProgressBar.setVisibility(View.VISIBLE);
}
}
#Override
public void onLoadingFailed(String imageUri, View view, FailReason failReason) {
if(holder.mProgressBar != null){
holder.mProgressBar.setVisibility(View.GONE);
}
}
#Override
public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
if(holder.mProgressBar != null){
holder.mProgressBar.setVisibility(View.GONE);
}
}
#Override
public void onLoadingCancelled(String imageUri, View view) {
if(holder.mProgressBar != null){
holder.mProgressBar.setVisibility(View.GONE);
}
}
});
return convertView;
}
}
The activity that uses gridView,
GalleryActivity.java
package com.example.android.tabswithswipes;
import android.app.ActionBar;
import android.app.Activity;
import android.content.Context;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.Spinner;
import android.widget.TextView;
import com.example.android.tabswithswipes.Utils.GridImageAdapter;
import com.example.android.tabswithswipes.Utils.UniversalImageLoader;
import com.nostra13.universalimageloader.core.ImageLoader;
import java.util.ArrayList;
/**
* Created by Chaitanya Shiva on 08-05-2018.
*/
public class GalleryFragment extends Activity {
private GridView gridView;
private ImageView galleryImage;
private ProgressBar mProgressBar;
private Spinner directorySpinner;
private Context mContext = GalleryFragment.this;
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_gallery);
galleryImage = (ImageView)findViewById(R.id.galleryImageView);
gridView = (GridView)findViewById(R.id.gridView);
directorySpinner = (Spinner)findViewById(R.id.spinnerDirectory);
mProgressBar = (ProgressBar)findViewById(R.id.progressBar);
mProgressBar.setVisibility(View.GONE);
ImageView closeGallery = (ImageView)findViewById(R.id.closeGallery);
closeGallery.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
finish();
}
});
TextView nextScreen = (TextView) findViewById(R.id.tvNext);
nextScreen.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
}
});
tempGridSetup();
}
private void setUpImageGrid(ArrayList<String> imgURLs){
GridView gridView = (GridView)findViewById(R.id.gridView);
GridImageAdapter adapter = new GridImageAdapter(mContext, R.layout.layout_grid_imageview,"", imgURLs);
gridView.setAdapter(adapter);
}
private void tempGridSetup(){
ArrayList<String> imgURLs = new ArrayList<>();
imgURLs.add("https://www.gstatic.com/webp/gallery/4.sm.jpg");
imgURLs.add("https://www.gstatic.com/webp/gallery3/1.sm.png");
imgURLs.add("https://cdn.pixabay.com/photo/2018/05/10/09/07/bleeding-heart-3387085_1280.jpg");
imgURLs.add("https://images.idgesg.net/images/article/2017/08/android_robot_logo_by_ornecolorada_cc0_via_pixabay1904852_wide-100732483-large.jpg");
imgURLs.add("https://www.androidcentral.com/sites/androidcentral.com/files/styles/xlarge_wm_brw/public/article_images/2018/03/android-p-logo-pixel-2-xl-5.jpg?itok=DB93lUGS");
imgURLs.add("https://www.androidcentral.com/sites/androidcentral.com/files/styles/xlarge_wm_brw/public/article_images/2018/03/android-p-virtual-notch.jpg?itok=EnKJzDgF");
imgURLs.add("https://www.androidcentral.com/sites/androidcentral.com/files/styles/xlarge_wm_brw/public/article_images/2018/03/samsung-galaxy-s9-plus-black-4.jpg?itok=bTitZlS_");
imgURLs.add("https://www.extremetech.com/wp-content/uploads/2017/03/smiling-android.jpg");
imgURLs.add("https://rimblogs.files.wordpress.com/2016/04/marshmallowman.png?w=800");
imgURLs.add("https://www.androidcentral.com/sites/androidcentral.com/files/topic_images/2015/android-apps-topic.png");
imgURLs.add("https://images.idgesg.net/images/article/2017/11/android-security-100741557-large.jpg");
setUpImageGrid(imgURLs);
}
}
I have a fragment of installed apps in a listview with a switch button next to it.
What I am trying to do is when the user hits the button and it is on, I want it to stay on when the user goes back, exits the app or restarts the activity.
I have done research and I know this is implementable but I am not sure how to achieve this.
Listview : How to remain highlighted/selected after press back button?
I tried following this but it was not successful.
Here is my adapter class:
package com.ibc.android.demo.appslist.app;
import android.app.Activity;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.graphics.drawable.Drawable;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Switch;
import android.widget.TextView;
import com.spicycurryman.getdisciplined10.app.R;
import java.util.List;
public class ApkAdapter extends BaseAdapter {
List<PackageInfo> packageList;
Activity context;
PackageManager packageManager;
boolean[] itemChecked;
SharedPreferences sharedPrefs;
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;
Switch ck1;
}
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.ck1= (Switch)convertView
.findViewById(R.id.checkBox1);
convertView.setTag(holder);
//holder.ck1.setTag(packageList.get(position));
} else {
holder = (ViewHolder) convertView.getTag();
}
// ViewHolder holder = (ViewHolder) convertView.getTag();
PackageInfo packageInfo = (PackageInfo) getItem(position);
Drawable appIcon = packageManager
.getApplicationIcon(packageInfo.applicationInfo);
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.ck1.setChecked(false);
//What would I put here!?!?
if (itemChecked[position])
holder.ck1.setChecked(true);
else
holder.ck1.setChecked(false);
holder.ck1.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (holder.ck1.isChecked()) {
itemChecked[position] = true;
Log.i("This is", " checked: " + position);
}
else {
itemChecked[position] = false;
Log.i("This is", " not checked: " + position);
}
}
});
return convertView;
}
}
Here is my InstalledAppActivity fragment class:
package com.spicycurryman.getdisciplined10.app;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageItemInfo;
import android.content.pm.PackageManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import com.ibc.android.demo.appslist.app.ApkAdapter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
public class InstalledAppActivity extends Fragment
implements OnItemClickListener {
PackageManager packageManager;
ListView apkList;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
setHasOptionsMenu(true);
View rootView = inflater.inflate(R.layout.user_installed, container, false);
packageManager = getActivity().getPackageManager();
/*To filter out System apps*/
apkList = (ListView) rootView.findViewById(R.id.applist);
new LoadApplications(getActivity().getApplicationContext()).execute();
return rootView;
}
/**
* Return whether the given PackageInfo represents a system package or not.
* User-installed packages (Market or otherwise) should not be denoted as
* system packages.
*
* #param pkgInfo
* #return boolean
*/
private boolean isSystemPackage(PackageInfo pkgInfo) {
return ((pkgInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) ? true
: false;
}
private boolean isSystemPackage1(PackageInfo pkgInfo) {
return ((pkgInfo.applicationInfo.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) != 0) ? false
: true;
}
// Don't need in Fragment
/*#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.block, menu);
// super.onCreateOptionsMenu(menu,inflater);
}*/
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
//ApkAdapter apkAdapter=(ApkAdapter)apkList.getAdapter();
}
private class LoadApplications extends AsyncTask<Void, Void, Void> {
Context mContext;
private ProgressDialog pDialog;
List<PackageInfo> packageList1 = new ArrayList<PackageInfo>();
public LoadApplications(Context context){
Context mContext = context;
}
#Override
protected Void doInBackground(Void... params) {
List<PackageInfo> packageList = packageManager
.getInstalledPackages(PackageManager.GET_PERMISSIONS);
/* List<ApplicationInfo> list = mContext.getPackageManager().getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES);
for(int n = 0;n<list.size();n++){
if ((list.get(n).flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP))
}*/
for(PackageInfo pi : packageList) {
boolean b = isSystemPackage(pi);
boolean c = isSystemPackage1(pi);
if(!b || !c ) {
packageList1.add(pi);
}
}
//sort by application name
final PackageItemInfo.DisplayNameComparator comparator = new PackageItemInfo.DisplayNameComparator(packageManager);
Collections.sort(packageList1, new Comparator<PackageInfo>() {
#Override
public int compare(PackageInfo lhs, PackageInfo rhs) {
return comparator.compare(lhs.applicationInfo, rhs.applicationInfo);
}
});
return null;
}
#Override
protected void onCancelled() {
super.onCancelled();
}
#Override
protected void onPreExecute() {
pDialog = new ProgressDialog(InstalledAppActivity.this.getActivity());
pDialog.setMessage("Loading your apps...");
pDialog.show();
}
#Override
protected void onPostExecute(Void result) {
apkList.setAdapter(new ApkAdapter(getActivity(), packageList1, packageManager));
if (pDialog.isShowing()){
pDialog.dismiss();
}
super.onPostExecute(result);
}
#Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
}
}
}
I am trying to figure out what modifications I need to make in order to keeping the switch buttons checked when after back button is hit, when app is closed/restarted etc.
EDIT:
I am getting an error in
holder.ck1.setChecked(sharedPrefs.getBoolean("NameOfThingToSave", true));
#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.ck1= (Switch)convertView
.findViewById(R.id.checkBox1);
convertView.setTag(holder);
//holder.ck1.setTag(packageList.get(position));
} else {
holder = (ViewHolder) convertView.getTag();
}
// ViewHolder holder = (ViewHolder) convertView.getTag();
PackageInfo packageInfo = (PackageInfo) getItem(position);
Drawable appIcon = packageManager
.getApplicationIcon(packageInfo.applicationInfo);
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.ck1.setChecked(false);
if (itemChecked[position])
holder.ck1.setChecked(true);
else
holder.ck1.setChecked(false);
holder.ck1.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (holder.ck1.isChecked()) {
itemChecked[position] = true;
Log.i("This is", " checked: " + position);
SharedPreferences.Editor editor = context.getSharedPreferences("com.ibc.android.demo.appslist.app", Context.MODE_PRIVATE).edit();
editor.putBoolean("checkBox1", true);
editor.commit();
}
else {
itemChecked[position] = false;
Log.i("This is", " not checked: " + position);
SharedPreferences.Editor editor = context.getSharedPreferences("com.ibc.android.demo.appslist.app", Context.MODE_PRIVATE).edit();
editor.putBoolean("checkBox1", false);
editor.commit();
}
}
});
sharedPrefs = getSharedPreferences("com.example.xyle", Context.MODE_PRIVATE);
holder.ck1.setChecked(sharedPrefs.getBoolean("NameOfThingToSave", true));
return convertView;
}
A common way of storing the state of certain objects in android is related to SharedPreferences. You basically store key-value pair in a dedicated file for your application. Within your activity most reasonably on its onDestroy() method you may store the state of a button as follows:
SharedPreferences prefs = getSharedPreferences(
"file_name", Context.MODE_PRIVATE);
Editor editor = prefs.edit();
editor.putBoolean("BUTTON_SELECTED", true);
editor.commit();
you can persist the state of the same button similarly reasonably within the onCreate() method of your activity as follows:
SharedPreferences prefs = getSharedPreferences(
"file_name", Context.MODE_PRIVATE);
boolean isButtonSelected = prefs.getBoolean("BUTTON_SELECTED", false);
and you can then set the last state of that particular button;
In my android app, I have two fragments one with installed apps and one that is blank. Both are listviews. I have a plus sign next to each item in the installed app listview. I am trying to make it so that when the user clicks the plus button. The listview app item goes to the blank fragment.
What I am trying to do is use create a public string array in the activity which is holding the tabs and when I click on the plus button add the packagename to the array.
And then in the blank fragment I am trying to check if it is found in the string array using the index.
In my BlockActivity class with holds the actionbar tabs I made this:
public static List<String> blacklist = new ArrayList<String>();
And here is my blank fragment condition to retrieve the app:
if(!b || !c ) {
if (BlockActivity.blacklist.contains(pi.packageName))
{
packageList1.add(pi);
}
}
Now I think I have to you will have to reference to the position of the item the button was clicked from listview. Doing this, I will probably have to reference a method from my adapter class, but I am not sure how to implement that and the method.
I am trying to follow something similar to this:
http://androidexample.com/How_To_Create_A_Custom_Listview_-_Android_Example/index.php?view=article_discription&aid=67&aaid=92
Here is my adapter class:
package com.ibc.android.demo.appslist.app;
import android.app.Activity;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.graphics.drawable.Drawable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageButton;
import android.widget.TextView;
import com.spicycurryman.getdisciplined10.app.R;
import java.util.List;
public class ApkAdapter extends BaseAdapter {
List<PackageInfo> packageList;
Activity context;
PackageManager packageManager;
boolean[] itemChecked;
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;
ImageButton ck1;
}
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.ck1 = (ImageButton) convertView
.findViewById(R.id.plus1);
convertView.setTag(holder);
//holder.ck1.setTag(packageList.get(position));
} else {
holder = (ViewHolder) convertView.getTag();
}
// ViewHolder holder = (ViewHolder) convertView.getTag();
PackageInfo packageInfo = (PackageInfo) getItem(position);
Drawable appIcon = packageManager
.getApplicationIcon(packageInfo.applicationInfo);
String appName = packageManager.getApplicationLabel(
packageInfo.applicationInfo).toString();
appIcon.setBounds(0, 0, 75, 75);
holder.apkName.setCompoundDrawables(appIcon, null, null, null);
holder.apkName.setCompoundDrawablePadding(15);
holder.apkName.setText(appName);
// I guess the onClickListener would go here??!?!? Not sure how to do it in this case and reference it to the Fragment??
return convertView;
}
}
And here is my blank fragment:
package com.spicycurryman.getdisciplined10.app;
import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageItemInfo;
import android.content.pm.PackageManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
public class CustomList_Activity extends Fragment
implements OnItemClickListener {
PackageManager packageManager;
ListView apkList;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
setHasOptionsMenu(true);
View rootView = inflater.inflate(R.layout.user_installed, container, false);
packageManager = getActivity().getPackageManager();
/*To filter out System apps*/
apkList = (ListView) rootView.findViewById(R.id.applist);
new LoadApplications(getActivity().getApplicationContext()).execute();
return rootView;
}
/**
* Return whether the given PackageInfo represents a system package or not.
* User-installed packages (Market or otherwise) should not be denoted as
* system packages.
*
* #param pkgInfo
* #return boolean
*/
private boolean isSystemPackage(PackageInfo pkgInfo) {
return ((pkgInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) ? true
: false;
}
private boolean isSystemPackage1(PackageInfo pkgInfo) {
return ((pkgInfo.applicationInfo.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) != 0) ? false
: true;
}
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
}
private class LoadApplications extends AsyncTask<Void, Void, Void> {
List<PackageInfo> packageList1 = new ArrayList<PackageInfo>();
public LoadApplications(Context context){
Context mContext = context;
}
#Override
protected Void doInBackground(Void... params) {
List<PackageInfo> packageList = packageManager
.getInstalledPackages(PackageManager.GET_PERMISSIONS);
for(PackageInfo pi : packageList) {
boolean b = isSystemPackage(pi);
boolean c = isSystemPackage1(pi);
if(!b || !c ) {
if (BlockActivity.blacklist.contains(pi.packageName))
{
packageList1.add(pi);
}
}
}
//sort by application name
final PackageItemInfo.DisplayNameComparator comparator = new PackageItemInfo.DisplayNameComparator(packageManager);
Collections.sort(packageList1, new Comparator<PackageInfo>() {
#Override
public int compare(PackageInfo lhs, PackageInfo rhs) {
return comparator.compare(lhs.applicationInfo, rhs.applicationInfo);
}
});
return null;
}
#Override
protected void onCancelled() {
super.onCancelled();
}
#Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
}
}
}
Edit: Here is the fragment with the installedapps
http://pastebin.com/L7dYfp3n
In my Android project, I am trying to return a list of user-installed and system apps alphabetically in two fragments within an actionbaractivity in scrollable tabs
I used an custom adapter class to get the list of apps and have code to return either user-installed or pre-installed apps in the listview. However, I am trying to return them in both alphabetical order.
I am trying to follow these but no luck.
http://www.androprogrammer.com/2013/10/list-view-with-check-box-using-custom.html
Alphabetize List of Installed Apps
Right now I have this as my Adapter Class:
package com.ibc.android.demo.appslist.app;
import android.app.Activity;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.graphics.drawable.Drawable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.TextView;
import android.view.View.OnClickListener;
import com.spicycurryman.getdisciplined10.app.R;
import java.util.List;
public class ApkAdapter extends BaseAdapter {
List<PackageInfo> packageList;
Activity context;
PackageManager packageManager;
boolean[] itemChecked;
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;
}
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.ck1 = (CheckBox) convertView
.findViewById(R.id.checkBox1);
convertView.setTag(holder);
//holder.ck1.setTag(packageList.get(position));
} else {
holder = (ViewHolder) convertView.getTag();
}
// ViewHolder holder = (ViewHolder) convertView.getTag();
PackageInfo packageInfo = (PackageInfo) getItem(position);
Drawable appIcon = packageManager
.getApplicationIcon(packageInfo.applicationInfo);
String appName = packageManager.getApplicationLabel(
packageInfo.applicationInfo).toString();
appIcon.setBounds(0, 0, 75, 75);
holder.apkName.setCompoundDrawables(appIcon, null, null, null);
holder.apkName.setCompoundDrawablePadding(15);
holder.apkName.setText(appName);
holder.ck1.setChecked(false);
if (itemChecked[position])
holder.ck1.setChecked(true);
else
holder.ck1.setChecked(false);
holder.ck1.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (holder.ck1.isChecked())
itemChecked[position] = true;
else
itemChecked[position] = false;
}
});
return convertView;
}
}
And here is one of my java classes. This one is for returning the user-installed apps:
package com.spicycurryman.getdisciplined10.app;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import com.ibc.android.demo.appslist.app.ApkAdapter;
import java.util.ArrayList;
import java.util.List;
public class InstalledAppActivity extends Fragment
implements OnItemClickListener {
PackageManager packageManager;
ListView apkList;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
setHasOptionsMenu(true);
View rootView = inflater.inflate(R.layout.user_installed, container, false);
packageManager = getActivity().getPackageManager();
List<PackageInfo> packageList = packageManager
.getInstalledPackages(PackageManager.GET_PERMISSIONS);
List<PackageInfo> packageList1 = new ArrayList<PackageInfo>();
/*To filter out System apps*/
for(PackageInfo pi : packageList) {
boolean b = isSystemPackage(pi);
if(!b) {
packageList1.add(pi);
}
}
apkList = (ListView) rootView.findViewById(R.id.applist);
apkList.setAdapter(new ApkAdapter(getActivity(), packageList1, packageManager));
apkList.setOnItemClickListener(this);
return rootView;
}
/**
* Return whether the given PackgeInfo represents a system package or not.
* User-installed packages (Market or otherwise) should not be denoted as
* system packages.
*
* #param pkgInfo
* #return boolean
*/
private boolean isSystemPackage(PackageInfo pkgInfo) {
return ((pkgInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) ? true
: false;
}
// Don't need in Fragment
/*#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.block, menu);
// super.onCreateOptionsMenu(menu,inflater);
}*/
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
}
}
To sort lists in Java, the simplest way is to use Collections.sort(). You just need an appropriate Comparator<?>.
I assume you want to sort by application name. In that case you can use something like this:
final PackageItemInfo.DisplayNameComparator comparator = new PackageItemInfo.DisplayNameComparator(packageManager);
Collections.sort(packageList1, new Comparator<PackageInfo>()
{
#Override
public int compare(PackageInfo lhs, PackageInfo rhs)
{
return comparator.compare(lhs.applicationInfo, rhs.applicationInfo);
}
});
If you want to sort by package name, it's even simpler:
Collections.sort(packageList1, new Comparator<PackageInfo>()
{
#Override
public int compare(PackageInfo lhs, PackageInfo rhs)
{
return String.CASE_INSENSITIVE_ORDER.compare(lhs.packageName, rhs.packageName);
}
});
I got a problem in gridview scroll. I have make one custom gridview and insert widget in raw file and inflate them through view. I got proper result and proper data and everything is gone well but when I scroll gridview 3-4 times up down speedy it raises an OutOfMemoryException.
This app contain list of installed app list and icon
Here is my custome adapter's code:
package com.AppFavorits;
import java.util.ArrayList;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.AsyncTask;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import com.AppFavorits.ImageLoad.ImageLoader;
public class GridViewAdapter extends BaseAdapter {
private Context activit;
LayoutInflater inflator;
public RelativeLayout imgvGridItem;
public TextView txtGridItemlabel;
public CheckBox chkbxGridItem;
ArrayList<PInfo> lstpinfo = new ArrayList<PInfo>();
public ImageLoader imageLoader;
public GridViewAdapter(Context m1, ArrayList<PInfo> lstpinfo) {
activit = m1;
inflator = LayoutInflater.from(m1);
this.lstpinfo = lstpinfo;
imageLoader=new ImageLoader(m1.getApplicationContext());
}
public static class ViewHolder {
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
ViewHolder view;
// LayoutInflater inflator = activit.getLayoutInflater();
view = new ViewHolder();
convertView = inflator.inflate(R.layout.gridviewrow, null);
imgvGridItem = (RelativeLayout) convertView
.findViewById(R.id.rlGreidItemicon);
txtGridItemlabel = (TextView) convertView
.findViewById(R.id.txtGridItemlabel);
chkbxGridItem = (CheckBox) convertView
.findViewWithTag(R.id.chkbxGridItem);
if ((lstpinfo.get(position).appname.toString()) != null){
Drawable d = lstpinfo.get(position).icon;
//new ImageLoad().execute();
imgvGridItem.addView(getimageviewimage(lstpinfo.get(position).icon));
txtGridItemlabel.setText(lstpinfo.get(position).appname.toString());
// convertView.setTag(view);
}
return convertView;
}
#Override
public int getCount() {
return lstpinfo.size();
}
#Override
public Object getItem(int position) {
return lstpinfo.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
public RelativeLayout getimageviewimage(Drawable d) {
RelativeLayout seprator = new RelativeLayout(activit);
seprator.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT));
seprator.setGravity(Gravity.LEFT | Gravity.CENTER);
ImageView imgmap = new ImageView(activit);
imgmap.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT));
// imgmap.setBackgroundResource(R.drawable.a13);
Bitmap bitmap = ((BitmapDrawable)d).getBitmap();
imageLoader.DisplayImage(bitmap, imgmap);
//imgmap.setImageBitmap(bitmap);
seprator.setPadding(5, 5, 15, 5);
seprator.addView(imgmap);
return seprator;
}
private class ImageLoad extends AsyncTask<Void, Void, Void> {
// private final ProgressDialog dialog = new ProgressDialog(tranning.this);
protected void onPreExecute() {
// this.dialog.setMessage("Please Wait...");
// this.dialog.show();
// put your code which preload with processDialog
}
#Override
protected Void doInBackground(Void... arg0) {
// put your code here
return null;
}
#Override
protected void onPostExecute(final Void unused) {
/*if (this.dialog.isShowing()) {
this.dialog.dismiss();
} */
}
}
}
I think there are something wrong with getview.
In getView() you are not reusing convertView, but always inflating new one with inflator. This requires more memory and makes your code slower. Also, check that you are not leaking images with imageLoader.
out of memory usually means that there is not enough memory to load the file. try closing everything else (or atleast a few other apps) and trying again.
Download code From Following link and use gridview instead of listview
Lazy Loading Example