Not to repeat the code several times by extending the activities from a basic root file (BaseActivity). I have two menus for activities: one main and one drawer menu. Is it possible to write the java code on a single page so as not to have to repeat it every time?
public class MyListSiteActivity extends BaseActivity implements NavigationView.OnNavigationItemSelectedListener {
// other code
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my_list_site);
// Drawer menu
drawerLayout = (DrawerLayout) findViewById(R.id.dlMenu);
toggle = new ActionBarDrawerToggle(this, drawerLayout, R.string.open, R.string.close);
drawerLayout.addDrawerListener(toggle);
toggle.syncState();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
NavigationView navigationView = (NavigationView) findViewById(R.id.nvMenu);
navigationView.setNavigationItemSelectedListener(this);
// other code
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
//primary menu
if (id == R.id.login) {
Intent intentLogin = new Intent(this, Login.class);
this.startActivity(intentLogin);
return true;
} else if (id == R.id.setting){
return true;
}
// drawer menu
if (toggle.onOptionsItemSelected(item)){
return true;
}
return super.onOptionsItemSelected(item);
}
// drawer menu
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
switch(item.getItemId()) {
case R.id.insertSite:
Intent intentSiteActivity = new Intent(this, InsertSiteActivity.class);
startActivity(intentSiteActivity);
return true;
case R.id.myListSite:
Intent intentMyListSite = new Intent(this, MyListSiteActivity.class);
startActivity(intentMyListSite);
return true;
default:
return false;
}
}
}
BaseActivity:
public class BaseActivity extends AppCompatActivity {
public DrawerLayout drawerLayout;
public ActionBarDrawerToggle toggle;
// other code
// other code
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_base);
// other code
}
}
When I try to put the menu code on the file on BaseActivity, it always marks me error.
Related
I'm trying to open file.txt from my raw folder through a fragment.
here is my code on KonsumerFragment.java
public class KonsumerFragment extends Fragment implements View.OnClickListener{
public KonsumerFragment() {
// Required empty public constructor
}
float marginValue;
Spinner spinnerProduct;
Spinner spinnerType;
EditText pengajuan;
EditText tenor;
TextView tvAngsuran;
String[] arrayMargin;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_konsumer, container, false);
//Define Variables
spinnerProduct = (Spinner) v.findViewById(R.id.spinnerProduct) ;
spinnerType = (Spinner) v.findViewById(R.id.spinnerType);
pengajuan = (EditText) v.findViewById(R.id.etPengajuan);
tenor = (EditText) v.findViewById(R.id.etTenor);
// Inflate the layout for this fragment
Button hitung = (Button) v.findViewById(R.id.btnHitung);
hitung.setOnClickListener(this);
return v;
}
#Override
public void onClick(View view) {
try {
switch (view.getId()){
case R.id.btnHitung :
//simulate();
readMargin();
break;
}
} catch (Exception e){
e.getCause();
e.printStackTrace();
}
}
public void readMargin() throws FileNotFoundException {
try {
InputStream in = getContext().getResources().openRawResource(R.raw.margingriyafix);
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
String line = reader.readLine();
String result = "";
while(line !=null){
result += line + "\n";
}
arrayMargin = result.split("\\n");
for (int i=0 ; i<arrayMargin.length ; i++){
System.out.println(arrayMargin[i]);
}
System.out.println(arrayMargin);
} catch (Exception e){
System.out.println(e);
e.getCause();
}
}
}
MainActivity.java
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);
KonsumerFragment konsFragment = new KonsumerFragment();
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.frameLayout, konsFragment);
transaction.commit();
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_konsumer) {
KonsumerFragment konsFragment = new KonsumerFragment();
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.frameLayout, konsFragment);
transaction.commit();
} else if (id == R.id.nav_produktif) {
ProduktifFragment prodFragment = new ProduktifFragment();
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.frameLayout, prodFragment);
transaction.commit();
} 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;
}
the part of the reading file has been in the right way. I tested it running on MainAcivity directly. but it won't run on Fragment. it has been successfully running on an Activity, I believe that the problem comes from the InputStream, but anyway I've tried doing like
getActivity().getResources().openRawResource(R.raw.margingriyafix);
and also
getContext().getResources().openRawResource(R.raw.margingriyafix);
still not working.
please anyone help me.
I am new to android and I have implemented android studios drawerlayout. I designed the main page of my app in content_main. But now I want to switch pages by using the DrawerLayout to connect me to my CurrentSongsFragment that I created. Here is the code that is in my MainActivity.java class:
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();
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) {
setContentView(R.layout.fragment_current_song);
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
Here is what's in my CurrentSongsFragment.java class:
public class CurrentSongFragment extends android.app.Fragment
{
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
return inflater.inflate(R.layout.activity_main, container, false);
}
}
I am really struggling on how to switch the screens to show different content when I click on the fragment in the DrawerLayout. Help on this would be excellent(Let me know if I need to provide other code to be able to solve the solution) :D
Put this layout in your activity_main
<RelativeLayout
android:id="#+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent" />
and to add different fragment
public void addYourFragment(){
YourFragment myFragment = new YourFragment();
FragmentManager fragmentManager = this.getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.fragment_container, myFragment, tagToUniqlyIdentifiedFramgent);
fragmentTransaction.addToBackStack(tagToUniqlyIdentifiedFramgent);
fragmentTransaction.commit();
}
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
int id = item.getItemId();
Intent nextIntent;
switch (id){
case R.id.item1:
addYourFragment();
break;
case R.id.item2:
addYourFragmentTwo()
break;
case R.id.item3:
addYourFragmentThree()
break;
}
drawer.closeDrawer(GravityCompat.START);
return true;
}
in my main activity I initialized a class with a method which download data from my server.
I want to show a Progress Dialog until the download. But it doesn't show the Progress Dialog.
My Main Activity:
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);
setFragmentManager(new MainActivityFragment());
Updater updater = new Updater(this,(ViewGroup) findViewById(R.id.fragment));
updater.check();
}
public void setFragmentManager(Fragment fragment){
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.fragment, fragment);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.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();
switch (id){
case R.id.action_settings:
return true;
case R.id.medi_calc_item:
setFragmentManager(new MediCalcFragment());
default:
return super.onOptionsItemSelected(item);
}
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
switch (id){
case R.id.nav_start:
setFragmentManager(new MainActivityFragment());
break;
case R.id.nav_medis:
setFragmentManager(new MediAbcFragment());
break;
case R.id.nav_bos:
setFragmentManager(new BosAbcFragment());
break;
default:
break;
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
}
My Class:
public class Updater {
private Context context;
private ViewGroup viewGroup;
private VersionsDAO versionsDAO;
private MediDAO mediDAO;
private RegioDAO regioDAO;
private HashMap<String,Integer> onlineVersions;
private HashMap<String,Integer> versions;
private ProgressDialog progressDialog;
public Updater(Context context, ViewGroup viewGroup) {
this.context = context;
this.versionsDAO = new VersionsDAO(context);
this.mediDAO = new MediDAO(context);
this.viewGroup = viewGroup;
this.onlineVersions = new HashMap<>();
this.regioDAO = new RegioDAO(context);
this.progressDialog = new ProgressDialog(context);
}
public void check(){
progressDialog.setMessage(context.getString(R.string.update_cities));
progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
progressDialog.setIndeterminate(true);
progressDialog.show();
RequestQueue queue = Volley.newRequestQueue(this.context);
String url ="http://resper.de/resperApi.php?cmd=deStadt";
StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
try {
JSONArray jArray = new JSONArray(response);
for(int i = 0; i < jArray.length(); i++){
JSONObject jObject = jArray.getJSONObject(i);
regioDAO.insertDeStadt(jObject.getInt("id"), jObject.getString("name"), jObject.getInt("bl"), jObject.getInt("rb"), jObject.getInt("kreis"), jObject.getInt("lk"));
}
versionsDAO.updateVersion("deStadt", onlineVersions.get("deStadt"));
progressDialog.cancel();
}catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
serverNotAvailable();
}
});
queue.add(stringRequest);
progressDialog.cancel();
}
}
Remove progressDialog.cancel(); from last line. That is after queue.add(stringRequest); and try again.
I've implemented the following code , but when I run the app and click on an item in Drawer nothing happened. I guess it's a problem related to the Listener but I couldn't grasp how to fix it. or maybe other problem!
once I click on one item the only thing happen is the following two lines in the logcat :
01-12 03:14:26.606 1565-1565/? I/LatinIME: Starting input. Cursor position = -1,-1
01-12 03:14:29.601 1565-1565/? I/LatinIME: Starting input. Cursor position = 0,0
here is the code:
public class Welcome extends AppCompatActivity {
private DrawerLayout mDrawer,dlDrawer;
private NavigationView nvDrawer;
private ActionBarDrawerToggle drawerToggle;
private Toolbar toolbar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.welcome);
// Set a Toolbar to replace the ActionBar.
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
// Find our drawer view
dlDrawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawerToggle = setupDrawerToggle();
// Tie DrawerLayout events to the ActionBarToggle
dlDrawer.setDrawerListener(drawerToggle);
nvDrawer = (NavigationView) findViewById(R.id.nvView);
// Setup drawer view
setupDrawerContent(nvDrawer);
FragmentTransaction tx = getSupportFragmentManager().beginTransaction();
tx.replace(R.id.drawer_layout, new EditPersonal());
tx.commit();
}
private void setupDrawerContent(NavigationView navigationView) {
navigationView.setNavigationItemSelectedListener(
new NavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
selectDrawerItem(menuItem);
return true;
}
});
}
private ActionBarDrawerToggle setupDrawerToggle() {
return new ActionBarDrawerToggle(this, dlDrawer, toolbar, R.string.drawer_open, R.string.drawer_close);
}
public void selectDrawerItem(MenuItem menuItem) {
// Create a new fragment and specify the planet to show based on
// position
Fragment fragment = null;
Class fragmentClass;
switch(menuItem.getItemId()) {
case R.id.nav_first_fragment:
fragmentClass = EditPersonal.class;
break;
case R.id.nav_second_fragment:
fragmentClass = Chronogram.class;
break;
case R.id.nav_third_fragment:
fragmentClass = BloodTest.class;
break;
case R.id.nav_forth_fragment:
fragmentClass = GlucoseTest.class;
break;
case R.id.nav_fifth_fragment:
fragmentClass = SendRecord.class;
break;
case R.id.nav_sixth_fragment:
fragmentClass = ReviewLogin.class;
break;
case R.id.nav_seventh_fragment:
fragmentClass = SignOut.class;
break;
default:
fragmentClass = EditPersonal.class;
}
try {
fragment = (Fragment) fragmentClass.newInstance();
} catch (Exception e) {
e.printStackTrace();
}
// Insert the fragment by replacing any existing fragment
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.flContent,fragment).commit();
// Highlight the selected item, update the title, and close the drawer
menuItem.setChecked(true);
setTitle(menuItem.getTitle());
mDrawer.closeDrawers();
}
// ...
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (drawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
// Make sure this is the method with just `Bundle` as the signature
#Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
drawerToggle.syncState();
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Pass any configuration change to the drawer toggles
drawerToggle.onConfigurationChanged(newConfig);
}
}
the app screen shot:
On your switch case, try something like this:
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
case R.id.nav_first_fragment:
EditPersonal editPersonal= new EditPersonal();
fragmentTransaction.replace(R.id.flContent, editPersonal);
fragmentTransaction.commit();
break;
Do this on other cases too.
Have you tried putting logs into your code to see where the logic flows to or fails to flow to?
For example inside your switch statement, try seeing if menuItem.getItemId() actually matches your case statements. It'd help to see if your listener is actually the problem or if it's just not matching the cases. Or it could be a problem with your fragment manager.
Check out http://developer.android.com/reference/android/util/Log.html. You should be able to see the logs in logcat. Good luck!
Basically I have changed the code using the Activity (Navigation Drawer Activity) of Android studio itself. so here is the code :
public class Welcome extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
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.drawer_open, R.string.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.review_login_listview, 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.menu_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();
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
if (id == R.id.nav_first_fragment) {
// Handle the camera action
}
else {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
Every time I open my Activity from Navigation Drawer, a blank screen appears. I am trying to open a fragment from my Navigation:
public class MainActivity extends ActionBarActivity {
private ListView mDrawerList;
private DrawerLayout mDrawerLayout;
private ArrayAdapter<String> mAdapter;
private ActionBarDrawerToggle mDrawerToggle;
private String mActivityTitle;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mDrawerList = (ListView)findViewById(R.id.navList);mDrawerLayout = (DrawerLayout)findViewById(R.id.drawer_layout);
mActivityTitle = getTitle().toString();
addDrawerItems();
setupDrawer();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
}
private void addDrawerItems() {
String[] osArray = {"Math", "Physics", "Chemistry"};
mAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, osArray);
mDrawerList.setAdapter(mAdapter);
mDrawerList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
switch(position) {
case 0:
Intent a = new Intent(MainActivity.this, MathActivity.class);
startActivity(a);
break;
case 1:
Intent b = new Intent(MainActivity.this, PhysicsActivity.class);
startActivity(b);
break;
case 2:
Intent c = new Intent(MainActivity.this, ChemistryActivity.class );
startActivity(c);
break;
default:
}
}
});
}
private void setupDrawer() {
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.string.drawer_open, R.string.drawer_close) {
/** Called when a drawer has settled in a completely open state. */
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
getSupportActionBar().setTitle("Navigation!");
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
/** Called when a drawer has settled in a completely closed state. */
public void onDrawerClosed(View view) {
super.onDrawerClosed(view);
getSupportActionBar().setTitle(mActivityTitle);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
};
mDrawerToggle.setDrawerIndicatorEnabled(true);
mDrawerLayout.setDrawerListener(mDrawerToggle);
}
#Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
mDrawerToggle.syncState();
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
mDrawerToggle.onConfigurationChanged(newConfig);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.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;
}
// Activate the navigation drawer toggle
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
To open Activity like this:
public class MathActivity extends Activity{
protected void onCreate(Bundle bundle) {
setContentView(R.layout.math_fragment_activity);
super.onCreate(bundle);
}
}
Every time I do so, a blank screen appears. Why is this happening and can anyone help me solve this problem?
UPDATE:
Here is my layout file:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ListView
android:id="#+id/listViewAnimals"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:dividerHeight="0.1dp"
android:divider="#0000CC"/> </RelativeLayout>
Try switching your setContentiew to be after the super.onCreate call.