I follow this quide at http://stacktips.com/tutorials/android/android-gridview-example-building-image-gallery-in-android
i have to make a app with a gallery inbuilt.
i wanted to customize it so i did this and now its showing this error
package com.example.hakdows.anandraoadsul;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.GridView;
import java.util.ArrayList;
public class Gallery extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
private GridView gridView;
private GridViewAdapter gridAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_gallery);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
gridView = (GridView) findViewById(R.id.gridView);
gridAdapter = new GridViewAdapter( this,R.layout.grid_item_layout.getData());
gridView.setAdapter(gridAdapter);
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.gallery, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
// Handle the camera action
} else if (id == R.id.nav_gallery) {
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
this is my gallery class file
please help. It says Cannot resolve method 'getData()'
sorry if it was a silly question
Add this method to you Galler Activity, you forgot to add method.
I copy that from where you shared a tutorial link
// Prepare some dummy data for gridview
private ArrayList<ImageItem> getData() {
final ArrayList<ImageItem> imageItems = new ArrayList<>();
TypedArray imgs = getResources().obtainTypedArray(R.array.image_ids);
for (int i = 0; i < imgs.length(); i++) {
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), imgs.getResourceId(i, -1));
imageItems.add(new ImageItem(bitmap, "Image#" + i));
}
return imageItems;
}
}
First, there should be comma instead of dot:
this,R.layout.grid_item_layout , getData()
Second, you should have method getData() in your Gallery class, which will provide you with data for adapter.
Import Array list in GridViewAdapter.java class
Related
This question already has answers here:
What is a NullPointerException, and how do I fix it?
(12 answers)
Closed 1 year ago.
**Logcat
at com.example.appkhushveehoreca.MainActivity.setFragment(MainActivity.java:174)
at com.example.appkhushveehoreca.MainActivity.onCreate(MainActivity.java:55)
The app crashes on start can anyone please suggest me what to do.
I looked around on both Google and StackOverflow and I have found some information. However, I have not got it to work. Now I hope that I can get help with my code.
I'm relatively inexperienced in Android development.
package com.example.appkhushveehoreca;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.view.MenuItem;
import android.view.Menu;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.ImageView;
import com.bumptech.glide.Glide;
import com.google.android.material.navigation.NavigationView;
import androidx.annotation.NonNull;
import androidx.appcompat.app.ActionBarDrawerToggle;
import androidx.core.view.GravityCompat;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentTransaction;
import androidx.navigation.ui.AppBarConfiguration;
import androidx.drawerlayout.widget.DrawerLayout;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
private static final int HOME_FRAGMENT = 0;
private static final int REWARDS_FRAGMENT = 1;
private static final int ACCOUNT_FRAGMENT = 2;
private static final int WISHLIST_FRAGMENT = 3;
private FrameLayout frameLayout;
private ImageView actionBarLogo;
private int currentFragment = -1;
private NavigationView navigationView;
private Toolbar toolbar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.toolbar);
actionBarLogo = findViewById(R.id.actionBarLogo);
setSupportActionBar(toolbar);
DrawerLayout drawer = findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this,drawer,toolbar,R.string.navigation_drawer_open,
R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
setFragment(new HomeFragment(),HOME_FRAGMENT);
navigationView = findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
navigationView.getMenu().getItem(0).setChecked(true);
frameLayout = findViewById(R.id.main_frame_layout);
}
#Override
public void onBackPressed(){
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if(drawer.isDrawerOpen(GravityCompat.START)){
drawer.closeDrawer(GravityCompat.START);
}else{
if(currentFragment == HOME_FRAGMENT){
currentFragment = -1;
super.onBackPressed();
}else{
actionBarLogo.setVisibility(View.VISIBLE);
invalidateOptionsMenu();
setFragment(new HomeFragment(),HOME_FRAGMENT);
navigationView.getMenu().getItem(0).setChecked(true);
}
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
if(currentFragment == HOME_FRAGMENT) {
getMenuInflater().inflate(R.menu.main, menu);
getSupportActionBar().setDisplayShowTitleEnabled(false);
}
// else{
// getSupportActionBar().setDisplayShowTitleEnabled(true);
// }
return true;
}
#Override
public boolean onOptionsItemSelected(#NonNull MenuItem item) {
int id = item.getItemId();
if(id == R.id.main_search_icon){
/// todo: search
return true;
}else if(id == R.id.main_notification_icon){
/// todo: notification
return true;
}else if (id == R.id.main_cart_icon){
/// todo: cart
return true;
}
return super.onOptionsItemSelected(item);
}
public void goToFragment(String title,Fragment fragment, int fragmentNo){
actionBarLogo.setVisibility(View.GONE);
getSupportActionBar().setDisplayShowTitleEnabled(true);
getSupportActionBar().setTitle(title);
invalidateOptionsMenu();
setFragment(fragment,fragmentNo);
// if(fragmentNo == REWARDS_FRAGMENT){
// navigationView.getMenu().getItem(1).setChecked(true);
// }
}
#Override
public boolean onNavigationItemSelected(MenuItem item) {
////// Handle navigation view clicks here ///////
int id = item.getItemId();
if(id == R.id.nav_my_khushveeHoreca){
actionBarLogo.setVisibility(View.VISIBLE);
invalidateOptionsMenu();
setFragment(new HomeFragment(),HOME_FRAGMENT);
}else if(id == R.id.nav_my_account){
goToFragment("My Account",new MyAccountFragment(),ACCOUNT_FRAGMENT);
}else if(id == R.id.nav_my_offers){
goToFragment("My Rewards",new MyRewardsFragment(),REWARDS_FRAGMENT);
}else if(id == R.id.nav_my_wishlist){
goToFragment("My WishList",new MyWishlistFragment(),WISHLIST_FRAGMENT);
}else if(id == R.id.nav_sign_out) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
private void setFragment(Fragment fragment,int fragmentNo){
if(fragmentNo != currentFragment) {
currentFragment = fragmentNo;
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(frameLayout.getId(),fragment);
fragmentTransaction.commit();
}
}
}
First call frameLayout = findViewById(R.id.main_frame_layout);
then call setFragment(new HomeFragment(),HOME_FRAGMENT);
While building my app I noticed that my app force closes when I import any Java util in my MainActivity(.java).
The original one is this one:
package com.ivancristina.navigazione;
import android.content.Context;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.NavigationView;
import android.support.design.widget.Snackbar;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.LinearLayout;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setTitle("");
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();
}
});
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_formule) {
LinearLayout mainLayout = (LinearLayout) findViewById(R.id. main_container);
LayoutInflater inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.content_formule, null);
mainLayout.removeAllViews();
mainLayout.addView(layout);
} else if (id == R.id.nav_esempi) {
LinearLayout mainLayout = (LinearLayout) findViewById(R.id. main_container);
LayoutInflater inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.content_esempi, null);
mainLayout.removeAllViews();
mainLayout.addView(layout);
} else if (id == R.id.nav_home) {
LinearLayout mainLayout = (LinearLayout) findViewById(R.id. main_container);
LayoutInflater inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.content_main, null);
mainLayout.removeAllViews();
mainLayout.addView(layout);
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
while the that one with java is this one:
package com.ivancristina.navigazione;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.NavigationView;
import android.support.design.widget.Snackbar;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.SparseBooleanArray;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.Toast;
import java.util.*;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
private ImageView logo;
private Button github;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
initialize();
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setTitle("");
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();
}
});
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
private void initialize() {
logo = (ImageView) findViewById(R.id.logo);
github = (Button) findViewById(R.id.github);
logo.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View _v) {
showMessage("OnClick");
}
});
github.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View _v) {
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.github.com/ivancristina")));
}
});
}
// created automatically
private void showMessage(String _s) {
Toast.makeText(getApplicationContext(), _s, Toast.LENGTH_SHORT).show();
}
private int getRandom(int _minValue ,int _maxValue){
Random random = new Random();
return random.nextInt(_maxValue - _minValue + 1) + _minValue;
}
public ArrayList<Double> getCheckedItemPositionsToArray(ListView _list) {
ArrayList<Double> _result = new ArrayList<Double>();
SparseBooleanArray _arr = _list.getCheckedItemPositions();
for (int _iIdx = 0; _iIdx < _arr.size(); _iIdx++) {
if (_arr.valueAt(_iIdx))
_result.add((double)_arr.keyAt(_iIdx));
}
return _result;
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_formule) {
LinearLayout mainLayout = (LinearLayout) findViewById(R.id. main_container);
LayoutInflater inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.content_formule, null);
mainLayout.removeAllViews();
mainLayout.addView(layout);
} else if (id == R.id.nav_esempi) {
LinearLayout mainLayout = (LinearLayout) findViewById(R.id. main_container);
LayoutInflater inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.content_esempi, null);
mainLayout.removeAllViews();
mainLayout.addView(layout);
} else if (id == R.id.nav_home) {
LinearLayout mainLayout = (LinearLayout) findViewById(R.id. main_container);
LayoutInflater inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.content_main, null);
mainLayout.removeAllViews();
mainLayout.addView(layout);
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
I'm sure I made something wrong with some activity, anyway if anyone would like to get a look to the rest of the project, here there are my
content_main and content_formule, which as I said work fine without Java, but in this way are useless.
(Posted on behalf of the OP).
The mistake was mine.
I put initialize(); right after super.onCreate(savedInstanceState);. Moving it right before
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
solved my problem.
How can I change content to display after selecting an item in a NavigationDrawer?
I mean, for example, I selected LogIn option in NavigationDrawer, and now I want to change the content that is displayed to another in an XML file.
MainActivity (LauncherActivity) Java file:
package com.dotapps.sosgram;
import android.os.Bundle;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import net.hockeyapp.android.UpdateManager;
import net.hockeyapp.android.CrashManager;
import net.hockeyapp.android.LoginManager;
public class LauncherActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.navbar);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
LoginManager.register(this, "SECRET", LoginManager.LOGIN_MODE_EMAIL_PASSWORD);
LoginManager.verifyLogin(this, getIntent());
checkForUpdates();
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.launcher, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_login) {
// Here I want to change the layout
} else if (id == R.id.nav_signup) {
} else if (id == R.id.nav_fastsos) {
} else if (id == R.id.nav_about) {
} else if (id == R.id.nav_about) {
} else if (id == R.id.nav_settings) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_exit){
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
// HockeyApp
#Override
public void onResume() {
super.onResume();
checkForCrashes();
}
#Override
public void onPause() {
super.onPause();
unregisterManagers();
}
#Override
public void onDestroy() {
super.onDestroy();
unregisterManagers();
}
private void checkForCrashes() {
CrashManager.register(this);
}
private void checkForUpdates() {
UpdateManager.register(this);
}
private void unregisterManagers() {
UpdateManager.unregister();
}
}
Content:
Google Drive - (Due to my few rep, I have to share it via Drive)
Anyone know how to do it?
PD: I've tryed with setContentView(R.layout.login)but the app crashes
you can do it with fragments. for more check this links :
http://chrisrisner.com/Using-Fragments-with-the-Navigation-Drawer-Activity
https://www.simplifiedcoding.net/android-navigation-drawer-example-using-fragments/
This question already has answers here:
Start an activity from a fragment
(7 answers)
Closed 6 years ago.
SecondFragment.java
package com.hci.acer.heroesunite;
import android.app.Fragment;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
public class SecondFragment extends Fragment {
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.trivia, container, false);
Button button = (Button) view.findViewById(R.id.button1);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent i;
i = new Intent(SecondFragment.this, jrizal_trivia.class);
startActivity(i);
}
});
return view;
}
}
jrizal_trivia.java
package com.hci.acer.heroesunite;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
public class jrizal_trivia extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_jrizal_trivia);
}
}
MainActivity.java
package com.hci.acer.heroesunite;
import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v4.app.FragmentManager;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
android.app.FragmentManager fragmentManager = getFragmentManager();
if (id == R.id.nav_home) {
fragmentManager.beginTransaction()
.replace(R.id.content_frame
,new FirstFragment())
.commit();
} else if (id == R.id.nav_dyk) {
fragmentManager.beginTransaction()
.replace(R.id.content_frame
,new SecondFragment())
.commit();
} else if (id == R.id.nav_about) {
fragmentManager.beginTransaction()
.replace(R.id.content_frame
,new ThirdFragment())
.commit();
} else if (id == R.id.nav_hero1) {
startActivity(new Intent(this, jose_rizal.class));
} else if (id == R.id.nav_hero2) {
startActivity(new Intent(this, andres_bonifacio.class));
} else if (id == R.id.nav_hero3) {
startActivity(new Intent(this, emilio_aguinaldo.class));
} else if (id == R.id.nav_hero4) {
startActivity(new Intent(this, apolinario_mabini.class));
} else if (id == R.id.nav_hero5) {
} else if (id == R.id.nav_hero6) {
startActivity(new Intent(this, juan_luna.class));
} else if (id == R.id.nav_hero7) {
} else if (id == R.id.nav_hero8) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
And this is the error
Error:(28, 31) error: no suitable constructor found for
Intent(,Class) constructor
Intent.Intent(String,Uri) is not applicable (argument mismatch;
cannot be converted to String) constructor
Intent.Intent(Context,Class) is not applicable (argument mismatch;
cannot be converted to Context)
under (SecondFragment.this, jrizal_trivia.class);
error says. "Cannot resolve constructor'intent(com.hci.acer.heroesunite.SecondFragment,java.lang.Class)'
Help anyone ? i want to call another activity in my button here in SecondFragment. Thanks
i = new Intent(SecondFragment.this, jrizal_trivia.class);
the first param need a Context, so you can get Context from fragment by getActivity()/getContext().
so should be like this:
i = new Intent(getActivity(), jrizal_trivia.class);
now i'm pretty new to android development. i created a simple webview app successfully that loads a gta V map using gmap features and maptiler.
see here: https://youtu.be/qUNEpZbfRDM
but it had no navigation etc. so i decided t add a navigation drawer.
so that means all i need for this app to be complete are a webview function and nav drawer.
i tried this way: create a new app and activity using the standard nav drawer layout, then i tried to add the assets folder with the map files and ad the webview codes to the .java and .xml files.although i got it to work at first adding the webview code gives a duplicate. i searched here and on the web for examples but they confused me. can i just delete the duplicate oncreatebundle function and leave it like that. please check the code and tell me where i made errors in the code below:
package com.example.serdox.myapplication;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
WebView browser = (WebView) findViewById(R.id.webview);
WebSettings webSettings = browser.getSettings();
webSettings.setJavaScriptEnabled(true);
browser.loadUrl("file:///android_asset/interactive/map.html");
}
private class MyBrowser extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
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();
}
});
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) b findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
// Handle the camera action
} else if (id == R.id.nav_gallery) {
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
Try using this code : You have declared on create twice
package com.example.serdox.myapplication;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
private class MyBrowser extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
WebView browser = (WebView) findViewById(R.id.webview);
WebSettings webSettings = browser.getSettings();
webSettings.setJavaScriptEnabled(true);
browser.loadUrl("file:///android_asset/interactive/map.html");
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
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();
}
});
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) b findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
// Handle the camera action
} else if (id == R.id.nav_gallery) {
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
You have protected void onCreate() defined twice on the same class.
Remove one of them.