I can post to Facebook using their sharDialog() pop-up. However, if I want to post a set message on a button click, without having the dialog pop up, how do I go about doing that?
public class MainActivity extends AppCompatActivity {
private ShareDialog share;
private ShareLinkContent content;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FacebookSdk.sdkInitialize(getApplicationContext());
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
content = new ShareLinkContent.Builder().setContentTitle("CURRENT LOCATION").build();
share = new ShareDialog(this);
ImageButton fbBut = (ImageButton) findViewById(R.id.facebook_button);
fbBut.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
share.show(content);
}
});
}
#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) {
//Opens the settings preferences
Intent settings = new Intent(MainActivity.this, SettingsActivity.class);
MainActivity.this.startActivity(settings);
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
protected void onResume() {
super.onResume();
// Logs 'install' and 'app activate' App Events.
AppEventsLogger.activateApp(this);
}
#Override
protected void onPause() {
super.onPause();
// Logs 'app deactivate' App Event.
AppEventsLogger.deactivateApp(this);
}
}
This is the code that I have so far.
Related
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar maintoolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(maintoolbar);
Button button =(Button)findViewById(R.id.login);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
EditText e1=(EditText)findViewById(R.id.user);
EditText e2=(EditText)findViewById(R.id.paswrd);
String s1=e1.getText().toString();
String s2=e2.getText().toString();
MySync sync=new MySync();
sync.execute(s1,s2);
}
});
}
#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;
}
return super.onOptionsItemSelected(item);
}
class MySync extends AsyncTask<String,Void,Integer>{
ProgressDialog mProgressDialog;
protected void onPreExecute(){
//mProgressDialog = ProgressDialog.show(MainActivity.this, "Loading...", "Data is Loading...");
}
#Override
protected Integer doInBackground(String... params) {
int result =0;
if(params[0].equals("Mayank") && params[1].equals("1234")) result=1;
else result=2;
return result;
}
protected void onPostExecute(Integer... result){
if(result[0]== 1) startActivity(new Intent(MainActivity.this,Home.class));
// mProgressDialog.dismiss();
}
}
}
this doesnt lead me to home activity when username and password is correct that is mayank and 1234 why?
sorry i am newbie to android this is for learning purpose only.when i click login button and enter correct information that is mayank and 1234 is doest lead me to new activity.
Try,
protected void onPostExecute(Integer result){
if(result== 1)
startActivity(new Intent(MainActivity.this,Home.class));
// mProgressDialog.dismiss();
}
EDIT:
Integer... result means it is expecting varags.You are returning "Integer" from doInBackground. I never used varags in return type of doInBackground (I use AsyncTasks alot), but I would use an array like protected Integer[] doInBackground(String... params) { if I were to return multiple values. See this post.
I have an main activity that opens a child activity:
startActivity(new Intent(this, ChildActivity.class));
From within the child activity, I press the Back button to return back to the main activity. I also have this code in the main activity:
#Override
protected void onResume() {
super.onResume();
dosomething();
}
However, onResume is never reached.
Am I missing something?
This way, it's calling onResume() when you go back from child Activity to parent: Activity:
MainActivity.java
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView mTextView = (TextView)findViewById(R.id.mTextView);
mTextView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this,ChildActivity.class);
startActivity(intent);
}
});
}
#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
protected void onResume() {
super.onResume();
Toast.makeText(this,"Yes calling",Toast.LENGTH_LONG).show();
}
#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);
}
}
ChildActivity.java
public class ChildActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_child);
Toolbar mtooToolbar= (Toolbar)findViewById(R.id.mtoolBar);
setSupportActionBar(mtooToolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}
#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_child, 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;
}
if(id==android.R.id.home){
onBackPressed();
}
return super.onOptionsItemSelected(item);
}
#Override
public void onBackPressed() {
super.onBackPressed();
}
}
onResume() is called when the activity will start interacting with the user. At this point your activity is at the top of the activity stack, with user input going to it.
Always followed by onPause().
Check this link to understand the relationship:
Activity Lifecycle
you can use finish() method to finish your activity.
I have a first activity ("Home"), with two buttons: one is called About and leads to activity About and the second is named List and leads to the activity List.
Manifest.xml should be fine, but I get a load of tiny petty errors I can't fix up by myself, regrettably.
Home.class is the following
Public class Home extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
Button AboutButton = (Button)findViewById(R.id.About);
AboutButton.setOnClickListener(new View.OnClickListener()){
#Override
public void onClick(View view); {
Intent openAbout = new Intent(Home.this, About.class);
startActivity(openAbout);
}
}
Button ListButton = (Button)findViewById(R.id.List);
ListButton.setOnClickListener(new View.onClickListener());{
#Override
public void onClick(View view); {
Intent openList = new Intent(Home.this, List.class);
startActivity(openList);
}
}
}
#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_home, 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);
}
}
while About.class is like this
public class About extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_about);
Button ReturnButton = (Button)findViewById(R.id.Return);
ReturnButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent returnhome = new Intent(About.this, Home.class);
startActivity(returnhome);
}
public void onClick(View view); {
Intent returnhome = new Intent(About.this, Home.class);
startActivity(returnhome);
}
}
}
#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_about, 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);
}
}
and List is like this:
public class List extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list);
Button ReturnButton = (Button)findViewById(R.id.Return);
ReturnButton.setOnClickListener(new View.OnClickListener()){
#Override
public void onClick(View view) {
Intent returnhome = new Intent(About.this, Home.class);
startActivity(returnhome);
}
}
}
#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_list, 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);
}
}
I get lot of red light bulbs, saying, for instance that ")" or ";" is expected or (worse) onClickListener cannot be resolved
Last but not least: I copied this code online and I was wondering why after "View" there is a "view"; what does it mean?
I copied your code and I see fails everywhere... let me explain you what's going on ...
HOME CLASS
1.- You have to remove the ")"
2.- You don't have to ";" when you call onClick()
3.- When you are don on your onClick() NOW you have to close it, you missed the ");"
AboutButton.setOnClickListener(new View.OnClickListener()){ //<-- Just remove one
#Override
public void onClick(View view); { //<-- Remove this ";"
Intent openAbout = new Intent(Home.this, About.class);
startActivity(openAbout);
}
}//Here goes ");"
4.- The ListButton has the same issues so just fix it as you will fix the first one.
ABOUT CLASS
1.-On this case you have the setOnClickListener() ok, BUT why you have two onClick(View view)? It's not necessary just remove one of them.
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_about);
Button ReturnButton = (Button) findViewById(R.id.Return);
ReturnButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent returnhome = new Intent(About.this, Home.class);
startActivity(returnhome);
}
});
}
LIST CLASS
1.-Well in your List class you have made the same error as the first one... Your onClickListener() it's wrong.
2.-Once again you included an unnecessary ")" on new View.OnClickListener() just remove it,
3.-Another fail that I'm seeing is that you are trying to make an Intent but you are refering that you are on About.this and you are NOT. You are on List class so you have ot put List.this because the first parameter refers :
A Context as its first parameter (this is used because the Activity class is a subclass of Context)
More information about Intents
4.- You need to close again the setOnClickListener()
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list);
Button ReturnButton = (Button)findViewById(R.id.Return);
ReturnButton.setOnClickListener(new View.OnClickListener()){ //<-- remove one ")"
#Override
public void onClick(View view) {
Intent returnhome = new Intent(About.this, Home.class); //<-- Remove About.this and put List.this
startActivity(returnhome);
}
}//<-- Close the setOnClickListener() with ");"
}
It's okay guy, this is your first question and I'll answer it, but NOW as I've made the favor to take my time and explain to you what was wrong on your code take your time to :
How do I as a question on StackOverflow
Learn some Android basics
And the most IMPORTANT THING
DO NOT COPY PASTE AN INTERNET CODE if you don't know the basics, I mean you can copy paste the code, but you'll face with this problem every time you do this, so first of all read the tutorial, make an examples, and you'll improve every day.
I have created my dialog when I press one of the menu buttons:
#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_first__window, 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:
About_us aboutus = new About_us(this);
aboutus.show();
return true;
case R.id.close: System.exit(0); return true;
}
return super.onOptionsItemSelected(item);
}
My Dialog layout
<Button
android:layout_marginTop="10dp"
android:layout_width="match_parent"
android:layout_height="40dp"
android:text="Close"
android:onClick="ext_btn"/>
My Dialog Class
public class mydialog extends Dialog
{
public About_us(Context context) {
super(context);
}
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.about_us);
}
public void ext_btn(View view) {
About_us.this.dismiss();
}
}
I Have tried a lot of codes to make the close button dismiss the dialog.
My app always crashes.
Where is the mistake ?
Try this one.
Button btn_ext = (Button) findViewById(R.id.btn_ext);
btn_ext.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
dismiss();
}
});
i don't know what's wrong with my code. As long as i know my code is right, but i still got java.lang.null.pointer in
friendPickerFragment.loadData(false);
i already defined friendPickerFragment like this but still, i got error
friendPickerFragment = (FriendPickerFragment) fragmentManager.findFragmentById(R.id.friend_picker_fragment);
Here is my whole code and i think it's the same as facebook sdk sample friendpicker
public class PickFriends extends FragmentActivity {
FriendPickerFragment friendPickerFragment;
public static void populateParameters(Intent intent, String userId, boolean multiSelect, boolean showTitleBar){
intent.putExtra(FriendPickerFragment.USER_ID_BUNDLE_KEY,userId);
intent.putExtra(FriendPickerFragment.MULTI_SELECT_BUNDLE_KEY, multiSelect);
intent.putExtra(FriendPickerFragment.SHOW_TITLE_BAR_BUNDLE_KEY,showTitleBar);
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_pick_friends);
FragmentManager fragmentManager = getSupportFragmentManager();
if(savedInstanceState == null){
final Bundle args = getIntent().getExtras();
friendPickerFragment = new FriendPickerFragment(args);
fragmentManager.beginTransaction()
.add(R.id.friend_picker_fragment, friendPickerFragment);
//friendPickerFragment = (FriendPickerFragment) fragmentManager.findFragmentById(R.id.friend_picker_fragment);
} else {
friendPickerFragment = (FriendPickerFragment) fragmentManager.findFragmentById(R.id.friend_picker_fragment);
}
friendPickerFragment.setOnErrorListener(new PickerFragment.OnErrorListener() {
#Override
public void onError(PickerFragment<?> fragment, FacebookException error) {
PickFriends.this.onError(error);
}
});
friendPickerFragment.setOnDoneButtonClickedListener(new PickerFragment.OnDoneButtonClickedListener() {
#Override
public void onDoneButtonClicked(PickerFragment<?> fragment) {
SelectFriend application = (SelectFriend) getApplication();
application.setSelectedUsers(friendPickerFragment.getSelection());
setResult(RESULT_OK,null);
finish();
}
});
}
private void onError(Exception error){
String text = "Error Exception";
Toast toast = Toast.makeText(this,text,Toast.LENGTH_SHORT);
toast.show();
}
#Override
protected void onStart(){
super.onStart();
friendPickerFragment.loadData(false);
}
#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_pick_friends, 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);
}
}
Please help me. Thank you