This is not spam please help
I’m new to Android programming and I can’t pinpoint which triggers the error.
Can someone please explain to me the error and how to get rid of
I have this errors:
2024-05-12 14:02:52.733 1333-1364 AndroidRuntime com.jeffcheasey.bookmaster E FATAL EXCEPTION: AsyncTask #1
Process: com.jeffcheasey.bookmaster, PID: 1333
java.lang.RuntimeException: An error occurred while executing doInBackground()
at android.os.AsyncTask$4.done(AsyncTask.java:415)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:381)
at java.util.concurrent.FutureTask.setException(FutureTask.java:250)
at java.util.concurrent.FutureTask.run(FutureTask.java:269)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:305)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:644)
at java.lang.Thread.run(Thread.java:1012)
Caused by: java.lang.NullPointerException: fileName
at java.util.Objects.requireNonNull(Objects.java:232)
at android.content.res.AssetManager.open(AssetManager.java:901)
at android.content.res.AssetManager.open(AssetManager.java:881)
at com.jeffcheasey.bookmaster.Favourite$main_parse.doInBackground(Favourite.java:93)
at com.jeffcheasey.bookmaster.Favourite$main_parse.doInBackground(Favourite.java:79)
at android.os.AsyncTask$3.call(AsyncTask.java:394)
at java.util.concurrent.FutureTask.run(FutureTask.java:264)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:305)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:644)
at java.lang.Thread.run(Thread.java:1012)
2024-05-12 14:02:52.735 1333-1364 MainActivity com.jeffcheasey.bookmaster E Приложение завершилось из-за необработанного исключения:
java.lang.RuntimeException: An error occurred while executing doInBackground()
at android.os.AsyncTask$4.done(AsyncTask.java:415)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:381)
at java.util.concurrent.FutureTask.setException(FutureTask.java:250)
at java.util.concurrent.FutureTask.run(FutureTask.java:269)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:305)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:644)
at java.lang.Thread.run(Thread.java:1012)
Caused by: java.lang.NullPointerException: fileName
at java.util.Objects.requireNonNull(Objects.java:232)
at android.content.res.AssetManager.open(AssetManager.java:901)
at android.content.res.AssetManager.open(AssetManager.java:881)
at com.jeffcheasey.bookmaster.Favourite$main_parse.doInBackground(Favourite.java:93)
at com.jeffcheasey.bookmaster.Favourite$main_parse.doInBackground(Favourite.java:79)
at android.os.AsyncTask$3.call(AsyncTask.java:394)
at java.util.concurrent.FutureTask.run(FutureTask.java:264)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:305)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:644)
at java.lang.Thread.run(Thread.java:1012)
2024-05-12 14:02:52.741 1333-1364 asey.bookmaster com.jeffcheasey.bookmaster I System.exit called, status: 1
2024-05-12 14:02:52.741 1333-1364 AndroidRuntime com.jeffcheasey.bookmaster I VM exiting with result code 1, cleanup skipped.
And this code:
package com.jeffcheasey.bookmaster;
import android.annotation.TargetApi;
import android.app.SearchManager;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.graphics.PorterDuff;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Parcelable;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import androidx.appcompat.widget.SearchView;
import androidx.appcompat.widget.Toolbar;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TabHost;
import com.jeffcheasey.bookmaster.R;
import com.jeffcheasey.bookmaster.RV_Adapter.Info;
import com.jeffcheasey.bookmaster.RV_Adapter.Listener;
import com.jeffcheasey.bookmaster.RV_Adapter.Rec_Adap;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class Favourite extends AppCompatActivity implements Listener {
TabHost tabHost;
private List<Info> data;
private RecyclerView rv;
Rec_Adap adapter;
Db databaseHelper;
SQLiteDatabase db;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_favourite);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
toolbar.setTitle("BookMaster");
toolbar.setTitleTextColor(getResources().getColor(R.color.Opaque));
setSupportActionBar(toolbar);
tabHost = (TabHost) getParent().findViewById(android.R.id.tabhost);
rv= (RecyclerView) findViewById(R.id.rv);
databaseHelper = new Db(getApplicationContext());
databaseHelper.create_db();
(new main_parse() ).execute();
// создаем базу данных
data=new ArrayList<>();
LinearLayoutManager llm = new LinearLayoutManager(this);
rv.setLayoutManager(llm);
rv.setHasFixedSize(true);
adapter = new Rec_Adap(data);
adapter.setclick(this);
rv.setAdapter(adapter);
}
@Override
public void onRecyclerViewItemClicked(int position) {
Intent intent=new Intent(this,More.class);
intent.putExtra("id",data.get(position).getId());
startActivity(intent);
}
private class main_parse extends AsyncTask<Void, String, List<Info>> {
@Override
protected List<Info> doInBackground(Void... params) {
List<Info> data=new ArrayList<>();
db = databaseHelper.open();
Cursor query = db.rawQuery("SELECT * FROM book;", null);
int i=0;
while(query.moveToNext()){
String a = query.getString(5);
Bitmap bmp = null;
try {
String fileName = query.getString(5);
bmp = BitmapFactory.decodeStream(getAssets().open(fileName));
bmp=Bitmap.createScaledBitmap(bmp,100,100,true);
} catch (IOException e) {
e.printStackTrace();
Log.e("Image Loading Error", "Error loading image for item at position " + i + ": " + e.getMessage());
}
data.add(i,new Info(query.getInt(0),query.getString(1),query.getString(2),query.getString(6), bmp));
bmp=null;
}
query.close();
db.close();
return data;
}
protected void onPostExecute(List<Info> ts) {
super.onPostExecute(ts);
try {
if (data == null)
data = new ArrayList<>();
data.addAll(ts);
adapter.notifyDataSetChanged();
} catch (Exception e) {
}
}
}
@TargetApi(Build.VERSION_CODES.M)
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
SearchManager searchManager =
(SearchManager) getSystemService(Context.SEARCH_SERVICE);
SearchView searchView =
(SearchView) menu.findItem(R.id.search).getActionView();
searchView.setSearchableInfo(
searchManager.getSearchableInfo(getComponentName()));
searchView.setOnCloseListener(new SearchView.OnCloseListener() {
@Override
public boolean onClose() {
tabHost.getTabWidget().setVisibility(View.VISIBLE);
return false;
}
});
EditText txtSearch = searchView.findViewById(androidx.appcompat.R.id.search_src_text);
txtSearch.setHintTextColor(Color.LTGRAY);
txtSearch.setTextColor(Color.WHITE);
ImageView searchClose = searchView.findViewById(androidx.appcompat.R.id.search_close_btn);
searchClose.setColorFilter(Color.WHITE);
View searchplate = searchView.findViewById(androidx.appcompat.R.id.search_plate);
searchplate.getBackground().setColorFilter(Color.WHITE, PorterDuff.Mode.MULTIPLY);
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query)
{
int index=0;
tabHost.getTabWidget().setVisibility(View.VISIBLE);
int [] array=new int[data.size()];
for(int i=0;i<data.size();i++){
if(data.get(i).getName().toLowerCase().contains(query.toLowerCase())) {
db = databaseHelper.open();
Cursor query1 = db.rawQuery("SELECT * FROM book where name=" + "'" + data.get(i).getName() + "';", null);
while(query1.moveToNext()){
array[index]=query1.getInt(0);
index+=1;
}
query1.close();
db.close();
}
}
System.out.println(array.length);
Intent intent=new Intent(Favourite.this,Open_Search.class);
intent.putExtra("array",array);
startActivity(intent);
// adapter = new Rec_Adap(data2);
// rv.setAdapter(adapter);
// System.out.println("fuck");
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
tabHost.getTabWidget().setVisibility(View.INVISIBLE);
return false;
}
});
return true;
}
}
I’m writing a global mobile application for the first time, so it’s hard. The database has all the columns clearly, the problem is getting images from the assets folder whose name is indicated in the database itself
How can I fix It?
I dont know how to fix it.
i check file directories and image names all is correct
Plese explain me why is this?
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