When i am trying to display the contacts in card view when i click on Button it shows fatal exception error it doesnot display cardview anyone can solve this programming with brillliance and another error is it show only one cardview when i click on again the app will be strucked?
Showcontacts.java
public class ShowContacts extends Activity
{
private SQLiteDatabase db;
DbOperations doo;
private List<Contacts> contactsList;
private RecyclerView rv;
private Cursor c;
String names,email,address;
int phone;
String read_query = "select * from"+ ContactsTask.ContactsEntry.TABLE_NAME;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.recycle_layout);
doo = new DbOperations(this);
openDatabase();
rv = (RecyclerView)findViewById(R.id.recyclerview);
initializeData();
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
rv.setLayoutManager(linearLayoutManager);
rv.setHasFixedSize(true);
ContactAdapter cc = new ContactAdapter(contactsList);
rv.setAdapter(cc);
}
public void initializeData() {
contactsList = new ArrayList<>();
c = db.rawQuery(read_query,null);
c.moveToFirst();
while (!c.isLast())
{
names = c.getString(0);
phone = c.getInt(1);
email = c.getString(2);
address = c.getString(3);
contactsList.add(new Contacts(names,phone,email,address));
}
c.isLast();
names = c.getString(0);
phone = c.getInt(1);
email = c.getString(2);
address = c.getString(3);
contactsList.add(new Contacts(names,phone,email,address));
}
private void openDatabase() {
db = openOrCreateDatabase("contactDB", Context.MODE_PRIVATE,null);
}
}
Logacat error
06-28 08:57:43.107 568-568/com.example.anilkumar.contactstask E/AndroidRuntime: FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.anilkumar.contactstask/com.example.anilkumar.contactstask.ShowContacts}: android.database.sqlite.SQLiteException: near "fromcontacts": syntax error: , while compiling: select * fromcontacts
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
at android.app.ActivityThread.access$600(ActivityThread.java:123)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4424)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)
Caused by: android.database.sqlite.SQLiteException: near "fromcontacts": syntax error: , while compiling: select * fromcontacts
at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method)
at android.database.sqlite.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:68)
at android.database.sqlite.SQLiteProgram.compileSql(SQLiteProgram.java:143)
at android.database.sqlite.SQLiteProgram.compileAndbindAllArgs(SQLiteProgram.java:361)
at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:127)
at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:94)
at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:53)
at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:47)
at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1564)
at android.database.sqlite.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1538)
at com.example.anilkumar.contactstask.ShowContacts.initializeData(ShowContacts.java:44)
at com.example.anilkumar.contactstask.ShowContacts.onCreate(ShowContacts.java:34)
at android.app.Activity.performCreate(Activity.java:4466)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
at android.app.ActivityThread.access$600(ActivityThread.java:123)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4424)
at java.lang.reflect.Method.invokeNative(Native Method)
Another logact error
06-28 13:14:40.552 11252-11261/com.example.anilkumar.contactstask E/SQLiteDatabase: close() was never explicitly called on database '/data/data/com.example.anilkumar.contactstask/databases/contactDB'
android.database.sqlite.DatabaseObjectNotClosedException: Application did not close the cursor or database object that was opened here
at android.database.sqlite.SQLiteDatabase.<init>(SQLiteDatabase.java:1943)
at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:1007)
at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:986)
at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:962)
at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:1043)
at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:1036)
at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:761)
at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:215)
at com.example.anilkumar.contactstask.ShowContacts.openDatabase(ShowContacts.java:66)
at com.example.anilkumar.contactstask.ShowContacts.onCreate(ShowContacts.java:33)
at android.app.Activity.performCreate(Activity.java:4466)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
at android.app.ActivityThread.access$600(ActivityThread.java:123)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4424)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
Just update
String read_query = "select * from"+ ContactsTask.ContactsEntry.TABLE_NAME;
to
String read_query = "select * from "+ ContactsTask.ContactsEntry.TABLE_NAME;
Always close cursor. update your initializeData method
public void initializeData() {
try {
contactsList = new ArrayList<>();
try{
c = db.rawQuery(read_query,null);
c.moveToFirst();
while (!c.isLast())
{
names = c.getString(0);
phone = c.getInt(1);
email = c.getString(2);
address = c.getString(3);
contactsList.add(new Contacts(names,phone,email,address));
}
c.isLast();
names = c.getString(0);
phone = c.getInt(1);
email = c.getString(2);
address = c.getString(3);
contactsList.add(new Contacts(names,phone,email,address));
} catch (Exception e) {
// exception handling
} finally {
if(c != null){
c.close();
}
}
}
Related
My app when installed on my relatively new Huawei running Oreo 8.0 is able to launch and run the app smoothly. The app also runs fine on the Nexus Emulator running Lollipop. However, on my other phone running KitKat 4.4 the app crashes when launched.
I think the problem occured when I added a default NavigationDrawerActivity.
09-05 14:05:57.285 30968-30968/? E/AndroidRuntime: FATAL EXCEPTION:
main
Process: com.example.a_phi.myapplication, PID: 30968
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.a_phi.myapplication/com.example.a_phi.myapplication.LoginActivity}:
android.view.InflateException: Binary XML file line #2: Error
inflating class
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2264)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2313)
at android.app.ActivityThread.access$1100(ActivityThread.java:141)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1238)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5333)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:895)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:711)
at dalvik.system.NativeStart.main(Native Method)
Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class
at android.view.LayoutInflater.createView(LayoutInflater.java:620)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:669)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:694)
at android.view.LayoutInflater.inflate(LayoutInflater.java:469)
at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:290)
at android.app.Activity.setContentView(Activity.java:1958)
at com.example.a_phi.myapplication.LoginActivity.onCreate(LoginActivity.java:44)
at android.app.Activity.performCreate(Activity.java:5340)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2228)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2313)
at android.app.ActivityThread.access$1100(ActivityThread.java:141)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1238)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5333)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:895)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:711)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at android.view.LayoutInflater.createView(LayoutInflater.java:594)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:669)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:694)
at android.view.LayoutInflater.inflate(LayoutInflater.java:469)
at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:290)
at android.app.Activity.setContentView(Activity.java:1958)
at com.example.a_phi.myapplication.LoginActivity.onCreate(LoginActivity.java:44)
at android.app.Activity.performCreate(Activity.java:5340)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2228)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2313)
at android.app.ActivityThread.access$1100(ActivityThread.java:141)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1238)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5333)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:895)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:711)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.huawei.android.content.res.ResourcesEx.getThemeDrawable(ResourcesEx.java:655)
at com.huawei.android.content.res.ResourcesEx.loadDrawable(ResourcesEx.java:623)
at android.content.res.TypedArray.getDrawable(TypedArray.java:616)
at android.view.View.(View.java:3573)
at android.view.ViewGroup.(ViewGroup.java:470)
at android.widget.LinearLayout.(LinearLayout.java:179)
at android.widget.LinearLayout.(LinearLayout.java:175)
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at android.view.LayoutInflater.createView(LayoutInflater.java:594)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:669)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:694)
at android.view.LayoutInflater.inflate(LayoutInflater.java:469)
at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:290)
at android.app.Activity.setContentView(Activity.java:1958)
at com.example.a_phi.myapplication.LoginActivity.onCreate(LoginActivity.java:44)
at android.app.Activity.performCreate(Activity.java:5340)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2228)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2313)
at android.app.ActivityThread.access$1100(ActivityThread.java:141)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1238)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5333)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:895)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:711)
at dalvik.system.NativeStart.main(Native Method)
LoginActvity
public class LoginActivity extends Activity {
private UserLoginTask mAuthTask = null;
// UI references.
private EditText mEmailView;
private EditText mPasswordView;
private TextView mRegistrationScreen;
private View mProgressView;
private View mLoginFormView;
public String id;
#Override
#TargetApi(19)
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_PAN);
ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1);
setContentView(R.layout.activity_login_registration);
// Set up the login form.
mEmailView = (EditText) findViewById(R.id.email);
mPasswordView = (EditText) findViewById(R.id.password);
Button mEmailSignInButton = (Button) findViewById(R.id.email_sign_in_button);
mLoginFormView = findViewById(R.id.login_form);
mProgressView = findViewById(R.id.login_progress);
mRegistrationScreen = findViewById(R.id.registerLink);
mEmailSignInButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
String emailAddress = mEmailView.getText().toString().trim();
String password = mPasswordView.getText().toString().trim();
UserLoginTask callDOIB = new UserLoginTask();
try {
String loginSuccessFail = callDOIB.execute(emailAddress, password).get();
try {
JSONObject jsonObject = new JSONObject(loginSuccessFail);
id = jsonObject.getString("id");
//JSONObject id = jArray.getJSONObject(0);
System.out.println("json object at LoginActivity id is "+id);
authoriseLogin(loginSuccessFail, id);
}catch (JSONException e){
e.printStackTrace();
}
}catch(InterruptedException e){
e.printStackTrace();
}
catch (ExecutionException e){
e.printStackTrace();
}
}
});
mRegistrationScreen.setOnClickListener(new OnClickListener(){
public void onClick(View v){
Intent loadRegistration = new Intent(LoginActivity.this, RegisterActivity.class);
startActivity(loadRegistration);
}
});
}
public void authoriseLogin(String authorise, String id){
if (authorise.contains("id")) {
System.out.println(" accessLRA.authoriseLogin login has been called");
Session session = new Session(getApplicationContext());
session.setId(id);
Intent loadPersonal = new Intent(LoginActivity.this, MainActivity.class);
startActivity(loadPersonal);
System.out.println("Login has been authorised");
}
else{
System.out.println("Incorrect username or password");
}
}
}
It is giving me an inflate exception when loading the layout file using setContentView()
java.lang.RuntimeException: Unable to start activity
ComponentInfo{com.example.a_phi.myapplication/com.example.a_phi.myapplication.LoginActivity}:
android.view.InflateException: Binary XML file line #2: Error
inflating class
As suggested in the comments section, I was actually missing some other res -v21 folders which support API level 21 for Android KitKat. For some reason I didn't move them into my new project. It is working now, thank you.
I try to open another activity by pressing a button in mainactivity but the program crashed when button is pressed and I don't know why.
FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.shitapps.howtolosedignity/com.shitapps.howtolosedignity.ActivityQuiz}: java.lang.IllegalStateException: attempt to re-open an already-closed object: SQLiteDatabase: /data/data/com.shitapps.howtolosedignity/databases/masterblaster
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
at android.app.ActivityThread.access$600(ActivityThread.java:141)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5103)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalStateException: attempt to re-open an already-closed object: SQLiteDatabase: /data/data/com.shitapps.howtolosedignity/databases/masterblaster
at android.database.sqlite.SQLiteClosable.acquireReference(SQLiteClosable.java:55)
at android.database.sqlite.SQLiteDatabase.endTransaction(SQLiteDatabase.java:520)
at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:263)
at android.database.sqlite.SQLiteOpenHelper.getReadableDatabase(SQLiteOpenHelper.java:188)
at com.shitapps.howtolosedignity.DbHelper.getAllQuestions(DbHelper.java:104)
at com.shitapps.howtolosedignity.ActivityQuiz.onCreate(ActivityQuiz.java:32)
at android.app.Activity.performCreate(Activity.java:5133)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
at android.app.ActivityThread.access$600(ActivityThread.java:141)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5103)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
here is my code:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
saakt = (Button)findViewById(R.id.button2);
saakt.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, SecondActivity.class);
startActivity(intent);
}
;
});
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
}
I use Android Studio.
edit:
public List<Question> getAllQuestions() {
List<Question> quesList = new ArrayList<Question>();
String selectQuery = "SELECT * FROM " + TABLE_QUEST;
dbase=this.getReadableDatabase();
Cursor cursor = dbase.rawQuery(selectQuery, null);
if (cursor.moveToFirst()) {
do {
Question quest = new Question();
quest.setId(cursor.getInt(0));
quest.setJautajums(cursor.getString(1));
quest.setAtbilde(cursor.getString(2));
quest.setOpcijaA(cursor.getString(3));
quest.setOpcijaB(cursor.getString(4));
quest.setOpcijaC(cursor.getString(5));
quesList.add(quest);
} while (cursor.moveToNext());
}
return quesList;
}
dbase is already closed and can't be used. Try with a local instance.
Change
dbase=this.getReadableDatabase();
Cursor cursor = dbase.rawQuery(selectQuery, null);
with
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
You shouldn't close your database after each query. You can just keep reference to it as a singleton. You can find more info by the references :
Android SQLite DB When to Close
Best place to close database connection
I am having an issue with my college project. I am trying to delete a row from my one of my tables using the following query.
//---deletes a particular match---
public boolean deleteMatch(String name) {
SQLiteDatabase sqLiteDatabase = getWritableDatabase();
return sqLiteDatabase.delete(TABLE_FIXTURES, MATCH_OPPONENT + " = " + name, null) > 0;
}
Here I am trying to delete a record based upon the match_opponent and passing the String value name.
I am then calling this method in my EditSchedule activity below:
public class EditSchedule extends AppCompatActivity {
public Button fixtureSearch;
public EditText opponentName;
public String searchTerm;
ListView editMatch;
DBHelper dbHelper = new DBHelper(this);
SQLiteDatabase sqLiteDatabase;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_editfixture);
editMatch = (ListView) findViewById(R.id.listViewEditMatch);
opponentName = (EditText) findViewById(R.id.fixtureOpponentDelete);
searchTerm = opponentName.getText().toString();
fixtureSearch = (Button) findViewById(R.id.fixtureSearchButton);
fixtureSearch.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
dbHelper.deleteMatch(searchTerm);
}
}
);
}
}
So when I test my application by typing in a name of an opponent that I have in the fixture table and clicking on the delete button, I get the following error:
01-06 07:49:42.476 25778-25778/com.example.myacer.clubhub E/AndroidRuntime﹕ FATAL EXCEPTION: main
android.database.sqlite.SQLiteException: near "=": syntax error (code 1): , while compiling: DELETE FROM fixtures WHERE match_opponent =
at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:889)
at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:500)
at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
at android.database.sqlite.SQLiteDatabase.delete(SQLiteDatabase.java:1494)
at com.example.myacer.clubhub.database.DBHelper.deleteMatch(DBHelper.java:243)
at com.example.myacer.clubhub.manager.EditSchedule$1.onClick(EditSchedule.java:47)
at android.view.View.performClick(View.java:4240)
at android.view.View$PerformClick.run(View.java:17721)
at android.os.Handler.handleCallback(Handler.java:730)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5103)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
Can anyone see where I am going wrong? All help greatly appreciated.
You are passing blank value in deleteMatch(), put searchTerm = opponentName.getText().toString(); inside onClick()
fixtureSearch.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
searchTerm = opponentName.getText().toString();
dbHelper.deleteMatch(searchTerm);
}
}
);
As well as change your deleteMatch() method
sqLiteDatabase.delete(TABLE_FIXTURES, MATCH_OPPONENT + " = ?",new String[]{name});
try this:
sqLiteDatabase.delete(TABLE_FIXTURES, MATCH_OPPONENT + " = ?", new String[]{name})
I am having a few issues running my custom CursorAdapter in my application. According to my logcat, the error I get:
11-08 06:41:03.228 6109-6109/? W/System.err? java.lang.RuntimeException: Unable to start activity ComponentInfo{com.app.name/com.app.name.MyActivity}: java.lang.NullPointerException
11-08 06:41:03.229 6109-6109/? W/System.err? at com.app.name.MyActivity.onCreate(MyActivity.java:71)
11-08 06:41:03.231 6109-6109/? E/AndroidRuntime? FATAL EXCEPTION: main
occurs at line 71 which sets the adapter (obj.setAdapter(myAdapter)). Initially I thought my database data retrieve function (Cursor chatCursor = mydb.selectConversation(msgId);) did not return any data but after testing it with the chatCursor.getCount() function, I realized that was not the case. Kindly assist me in solving this issue. Below are the codes for my activity, adapter and logcat. Thanks in advance.
MyAdapter.java
public class MyAdapter extends CursorAdapter {
#TargetApi(Build.VERSION_CODES.HONEYCOMB)
public MyAdapter(Context context, Cursor cursor) {
super(context, cursor, 0);
}
#Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
return LayoutInflater.from(context).inflate(R.layout.chat_left, parent, false);
}
#Override
public void bindView(View view, Context context, Cursor cursor) {
TextView user = (TextView) view.findViewById(R.id.reply_user);
TextView msg = (TextView) view.findViewById(R.id.reply_msg);
String theTime = cursor.getString(cursor.getColumnIndexOrThrow("message_id"));
String theMessage = cursor.getString(cursor.getColumnIndexOrThrow("message"));
user.setText(theTime);
msg.setText(String.valueOf(theMessage));
}
}
MyActivity.java
public class MyActivity extends ListActivity {
//Utils Class
Utils util;
final Context context = this;
private ProgressBar dialog;
ListView obj;
DBHelper mydb;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_view);
util = new Utils(this);
mydb = new DBHelper(this);
Bundle extras = getIntent().getExtras();
final Integer msgId = extras.getInt("id");
obj = (ListView) findViewById(R.id.list);
Cursor chatCursor = mydb.selectConversation(msgId);
MyAdapter myAdapter = new MyAdapter(this, chatCursor);
obj.setAdapter(myAdapter);
}
}
logcat
11-08 06:41:03.228 6109-6109/? W/System.err? java.lang.RuntimeException: Unable to start activity ComponentInfo{com.app.name/com.app.name.MyActivity}: java.lang.NullPointerException
11-08 06:41:03.229 6109-6109/? W/System.err? at com.app.name.MyActivity.onCreate(MyActivity.java:71)
11-08 06:41:03.231 6109-6109/? E/AndroidRuntime? FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.app.name/com.app.name.MyActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2351)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2403)
at android.app.ActivityThread.access$600(ActivityThread.java:165)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1373)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5370)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.app.name.MyActivity.onCreate(MyActivity.java:71)
at android.app.Activity.performCreate(Activity.java:5122)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1150)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2315)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2403)
at android.app.ActivityThread.access$600(ActivityThread.java:165)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1373)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5370)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
at dalvik.system.NativeStart.main(Native Method)
11-08 06:41:03.238 559-832/? W/ActivityManager? Force finishing activity com.app.name/.MyActivity
11-08 06:41:03.742 559-574/? W/ActivityManager? Activity pause timeout for ActivityRecord{42e71938 u0 com.app.name/.MyActivity}
Take a look to your activity_view.xml. Probably the listview ID isn't "list" as you state when you try to find it with findViewById(R.layout.list).
My app closes when i insert this sample records for testing, i tried it in many ways. from activity class im sending string values to insert to the database.
My MainInvoiceActivity Class
public class MainInvoiceActivity extends Activity {
private DBHelper mydb ;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_invoice);
if ( mydb.insertsample( "one" , "two" , "3" )){ // LINE NO 67
Toast.makeText(getApplicationContext(), "Insert Success!", Toast.LENGTH_SHORT).show();
}
else{
Toast.makeText(getApplicationContext(), "not done", Toast.LENGTH_SHORT).show();
}
}
}
My database SQLiteOpenHelper class
public class DBHelper extends SQLiteOpenHelper {
public static final String DATABASE_NAME = "MyDBName.db";
public static final String TABLE_SAMPLE = "sample";
public DBHelper(Context context)
{
super(context, DATABASE_NAME , null, 1);
}
public void onCreate(SQLiteDatabase db) {
String CREATE_SAMPLE_TABLE = "CREATE TABLE sample ( " +
"id INTEGER PRIMARY KEY AUTOINCREMENT, " +
"one TEXT, "+
"two TEXT, "+
"three TEXT )";
db.execSQL(CREATE_SAMPLE_TABLE);
}
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS sample");
onCreate(db);
}
public boolean insertsample (String one, String two, String three)
{
SQLiteDatabase db = this.getWritableDatabase();
ContentValues myValues = new ContentValues();
myValues.put(one, one);
myValues.put(two, two);
myValues.put(three, three);
db.insert(TABLE_SAMPLE, null, myValues);
return true;
}
}
LOG message
E/AndroidRuntime(1153): FATAL EXCEPTION: main
E/AndroidRuntime(1153): Process: com.ezycode.pos, PID: 1153
E/AndroidRuntime(1153): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.ezycode.pos/com.ezycode.pos.MainInvoiceActivity}: java.lang.NullPointerException
E/AndroidRuntime(1153): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
E/AndroidRuntime(1153): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
E/AndroidRuntime(1153): at android.app.ActivityThread.access$800(ActivityThread.java:135)
E/AndroidRuntime(1153): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
E/AndroidRuntime(1153): at android.os.Handler.dispatchMessage(Handler.java:102)
E/AndroidRuntime(1153): at android.os.Looper.loop(Looper.java:136)
E/AndroidRuntime(1153): at android.app.ActivityThread.main(ActivityThread.java:5017)
E/AndroidRuntime(1153): at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(1153): at java.lang.reflect.Method.invoke(Method.java:515)
E/AndroidRuntime(1153): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
E/AndroidRuntime(1153): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
E/AndroidRuntime(1153): at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime(1153): Caused by: java.lang.NullPointerException
E/AndroidRuntime(1153): at com.ezycode.pos.MainInvoiceActivity.onCreate(MainInvoiceActivity.java:67)
E/AndroidRuntime(1153): at android.app.Activity.performCreate(Activity.java:5231)
E/AndroidRuntime(1153): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
E/AndroidRuntime(1153): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
Correct code will be like something below
public class MainInvoiceActivity extends Activity {
private DBHelper mydb ;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_invoice);
mydb = new DBHelper(this); //This is missing your code.
if ( mydb.insertsample( "one" , "two" , "3" )){ // LINE NO 67
Toast.makeText(getApplicationContext(), "Insert Success!", Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(getApplicationContext(), "not done", Toast.LENGTH_SHORT).show();
}
}