I am trying to move from one activity to another activity by clicking to the ImageButton. But when I click to button, it doesn't move to the activity which I specify in the code, and even it does not throw an error. I'm not getting where is problem
Here is my code which calls next activity :
package com.birthdayreminder;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.TextView;
public class Reminder extends Activity {
ImageButton view, add, edit;
TextView tvadd, tvedit, tvview;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_reminder);
}
public void innicialize() {
// assigning buttons
view = (ImageButton) findViewById(R.id.bView);
add = (ImageButton) findViewById(R.id.bAdd);
edit = (ImageButton) findViewById(R.id.bEdit);
// assign textview
tvadd = (TextView) findViewById(R.id.tvAdd);
tvedit = (TextView) findViewById(R.id.tvEdit);
tvview = (TextView) findViewById(R.id.tvView);
add.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent i=new Intent(Reminder.this, Addreminder.class);
startActivity(i);
}
});
edit.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// enter the code for bEditBtn click here
}
});
view.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// enter the code for bViewBtn click here
}
});
}
}
I have also declared the class name in the manifest.xml but it does not working
Logcat Log file : 5 lines of last logcat file after clicking the button :
05-15 18:19:25.495: W/AudioFlinger(33): write blocked for 69 msecs, 1245 delayed
writes, thread 0xc658
05-15 18:19:28.964: I/ActivityManager(60): Starting: Intent {
act=com.birthdayreminder.REMINDER cmp=com.birthdayreminder/.Reminder } from pid 548
05-15 18:19:29.409: I/ActivityManager(60): Displayed
com.birthdayreminder/.Reminder: +426ms
try using getApplicationContext() in place of Remainder.this
check if you have a click listener on you imagebutton, you have declared what to do on click, but if you don't have any listener on the imagebutton, it won't work anyway.
You can try something like this :
yourImageButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(Reminder.this, Addreminder.class);
startActivity(intent);
}
});
After doing this, you must have declared in your XML file the activity
<activity android:name="packageName.className" />
Finally, check if the new class is working well too but it must be ok!
==================================================================================
You mustn't declare a function or procedure in a function (like you did in onCreate), you can simply do what you do in initialize in your onCreate function like this :
package com.birthdayreminder;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.TextView;
public class Reminder extends Activity {
private ImageButton view;
private ImageButton add;
private ImageButton edit;
private TextView tvadd;
private TextView tvedit;
private TextView tvview;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_reminder);
// Instantiating Buttons
view = (ImageButton) findViewById(R.id.bView);
add = (ImageButton) findViewById(R.id.bAdd);
edit = (ImageButton) findViewById(R.id.bEdit);
// Instantiating Views
tvadd = (TextView) findViewById(R.id.tvAdd);
tvedit = (TextView) findViewById(R.id.tvEdit);
tvview = (TextView) findViewById(R.id.tvView);
// Adding a clickListener on add button
add.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent i=new Intent(Reminder.this, Addreminder.class);
startActivity(i);
}
});
// Adding a clickListener on edit button
edit.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// enter the code for bEditBtn click here
}
});
// Adding a clickListener on view button
view.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// enter the code for bViewBtn click here
}
});
}
}
If you still have a problem, check your XML files, and look if you have well declared your buttons.
Problem Fixed: Never define a function in a function, because everytime you call the first function you'll define again the second function.
What you did which is wrong :
onCreate { //WRONG VERSION
bla bla bla bla
initialisation {
bla bla bla
}
}
What you have to do :
onCreate { //GOOD VERSION
initialisation();
bla bla bla
}
initialisation {
bla bla bla
}
you can call a function in a function, but you can't define a function in a function.
Moreover, you never call your initialisation function, you must call it now in your onCreate function or nothing will happen.
have you set onClickListener on add button.
btnAdd.setOnClickListener(this);
also check the
is your v.getId() and case R.id.bAdd: same?
debug and check that your case R.id.bAdd: is getting executed..
Seperately initialize the buttons in the first activity as
Button bAddbutton= (Button) findViewById(R.id.bAdd);
Button bEditBtn= (Button) findViewById(R.id.bEdit);
Button bViewBtn= (Button) findViewById(R.id.bView);
Then add seperate onClick listeners for each button as given below,
bAddbutton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent i=new Intent(Reminder.this, Addreminder.class);
startActivity(i);
}
});
bEditBtn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// enter the code for bEditBtn click here
}
});
bViewBtn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// enter the code for bViewBtn click here
}
});
initialize the button and add listener first in oncreate()
Button btnAdd = (Button) findViewById(R.id.bAdd);
btnAdd.setOnClickListener(this);
Related
I am new to coding.I want to code
in order to go to second activity using a button,
an editText and a pasdword in case it maches.
But it does n`t work.Please help me.Following is my code:
package com.mycompany.myapp;
import android.app.*;
import android.os.*;
import android.content.*;
import android.view.*;
import android.view.View.*;
import android.widget.*;
public class MainActivity extends Activity
{
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
EditText eText= (EditText)findViewById(R.id.mainEditText1);
String myCode=eText.getText().toString();
Button nextPage= (Button)findViewById(R.id.mainButton1);
if(myCode.equals("Titan")){
nextPage.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v){
startActivity(new Intent(MainActivity.
this,actor.class));
}
});
}
}
}
Move your condition and getText() call in listener
nextPage.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v){
String myCode=eText.getText().toString();
if(myCode.equals("Titan")){
startActivity(new Intent(MainActivity.
this,actor.class));
}
}
}
So, here's what's happening:
You have an EditText field in your app, where the user types their password.
You capture that EditText in your code using EditText eText = ...
You then check to see if eText.equals("Titan");
If it matches Titan, you see the onClick listener.
But, when this code is ran, the EditText is always empty, so you never set the onClick listener!
The fix is fairly straightforward:
nextPage.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v) {
String myCode=eText.getText().toString();
if(myCode.equals("Titan")) {
startActivity(new Intent(MainActivity.this,actor.class));
}
}
});
Now, when the button is clicked:
You capture the value of eText as myCode.
You check if myCode is equal to Titan
If true (ie it matches), you then run startActivity(new Intent(MainActivity.this,actor.class));
You have written class name actor.class starting with a smaller case. Make it starts with uppercase Actor.class. Bellow is the answer to your questions.
Button nextPage = (Button)findViewById(R.id.mainButton1);
nextPage.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v){
String myCode=eText.getText().toString();
if(myCode.equals("Titan"))
{
startActivity(new Intent(MainActivity.
this,Actor.class));
}else{
//password not matching
}
});
before posting my question , i wanna clarify that is my first post on stackoverflow and let's the story beggin.
as the title said , i'm making my first app on android and i found myself blocked with an issue .
there is 3 button on my app :
button1 : give textview2 "hello world again " and make it VISIBLE
// button2 : make textView2 INVISIBLE
// button3 : make textView1 INVISIBLE
this is the code freom main_activity :
package com.example.ismail.app_test_1;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends ActionBarActivity {
Button button_aff;
Button button_hide;
Button button_hide_hw;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button_aff = (Button) findViewById(R.id.button);
button_hide = (Button) findViewById(R.id.button2);
button_hide_hw = (Button) findViewById(R.id.button3);
button_aff.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Show("hello world again");
}
});
button_hide.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Hide();
}
});
button_hide_hw.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Hide_hw();
}
});
}
public void Show(String str)
{
TextView text;
text = (TextView) findViewById(R.id.textView2);
text.setVisibility(View.VISIBLE);
text.setText(str);
setContentView(text);
}
public void Hide()
{
TextView text;
text = (TextView) findViewById(R.id.textView2);
text.setVisibility(View.INVISIBLE);
setContentView(text);
}
public void Hide_hw()
{
TextView text;
text = (TextView) findViewById(R.id.textView);
text.setVisibility(View.INVISIBLE);
setContentView(text);
}
}
after getting it on my phone , when i touch any button : "Unfortunatly,app_test_1 has stopped !
can someone help me ?
Edit : i removed the setContentView and it works , thanks a lot guys. if someone has a good tuto that will help me to improve my android programming skills i'm a taker
Do not use setContentView() method outside of the onCreate()
just delete it in show and hide functions. Should work probably
Remove setContentView(text); and it will work. You don't need to call it.
package com.purelymean.earnings;
import android.app.Activity;
import android.os.Bundle;
import android.widget.Button;
import android.widget.TextView;
public class Main extends Activity{
/**Called when activity is first created. */
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button b = (Button) findViewById(R.id.button);
TextView tx = (TextView) findViewById(R.id.textView1);
}
}
What do I need to put so that when the button is clicked it will change the textview to whatever i put?
You should add an OnClickListener to your button and override onClick function to set your desire text in your TextView
Button b = (Button) findViewById(R.id.button);
b.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
TextView tx = (TextView) findViewById(R.id.textView1);
tx.setText("yourtext");
}
});
Add an OnClickListener to your button and thats all you need.
b.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
tx.setText("It Works!");
}
});
I tried to make a signup page in android where I use a reset button that should clear all fields in the page. Please see the code below and correct it as my code is not working.
Button btnreset = (Button) findViewById(R.id.btnreset);
btnreset.setOnClickListener(new View.OnClickListener() {
public void restartActivity(Activity act){
Intent intent=new Intent();
act.finish();
intent.setClass(act, act.getClass());
act.startActivity(intent);
}
}
this is an signup page and fields are first name,last name,user id,password.when user click on reset button it clear all the fields who's filled the user.I'm give a complete source code to you please check this:
package com.boyzcorn.android.fyp;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import android.content.Intent;
public class signup extends Activity{
public void onCreate(Bundle icicle)
{
super.onCreate(icicle);
setContentView(R.layout.signup);
Button b = (Button) findViewById(R.id.btnClick2);
Button btnreset = (Button) findViewById(R.id.btnreset);
final EditText eText1 = (EditText)findViewById(R.id.firstname);
final EditText eText2 = (EditText)findViewById(R.id.lastname);
final EditText eText3 = (EditText)findViewById(R.id.userid);
final EditText eText4 = (EditText)findViewById(R.id.password);
b.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
{
if(eText1.getText().toString().equals("") ||eText2.getText().toString().equals("") || eText3.getText().toString().equals("") ||eText4.getText().toString().equals(""))
{
Toast.makeText( getApplicationContext(),"Fill Empty Fields",Toast.LENGTH_SHORT ).show();
}
else
{
Intent i = new Intent(signup.this,login.class);
startActivity(i);
}
}
}
});
}
btnreset.setOnClickListener(new View.OnClickListener() {
public void restartActivity(Activity act){
Intent intent=new Intent();
act.finish();
intent.setClass(act, act.getClass());
act.startActivity(intent);
}
}
public void onClick(View arg0) {
}
}
You've only defined the function; you're not calling it. You will need to execute restartActivity(signup.this) from the OnClickListener.
Also, your intent will likely not execute, because its parent has been finished. Perhaps rearranging the lines of code might help, but a better solution would be having the parent activity start it. Try replacing the click listener with:
btnreset.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Activity act = signup.this;
Intent intent = new Intent(act, act.getClass());
act.startActivity(intent);
act.finish();
}
}
I have an activity class with many buttons. If i click one button then it will go to next page then go back to main class.If I click another button in main class, it will go to next page together with data. Do anyone know how to write the function in activity class?
Can I write like this in a class? But when i run it only one button is working , when i clicked other i get error. I am new to android ,so please give me suggestion.
public class MyClass extends Activity {
private Button button,button1,button2;
public void onCreate(){.... initControl();}
public void initControl() { button=(Button)findViewById(R.id.button); .....
button.SetonClickListener(new View.onClickListener(){ public void onClick(View view)})
button1.SetonClickListener(new View.onClickListener(){ public void onClick(View view)})
button2.SetonClickListener(new View.onClickListener(){ public void onClick(View view)})
}
thanks for help.
First initialize button1, button2 before overriding onCreate(). Then assign the values in oncreateMethod call initializemthod
Have a look on the following code
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class WebViewTest extends Activity {
Button button1 = null;
Button button2 = null;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
button1 = (Button) findViewById(R.id.firstbutton);
button2 = (Button) findViewById(R.id.secondbutton);
initControl();
}
public void initControl() {
button1.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
// TODO Auto-generated method stub
}
});
button2.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
// TODO Auto-generated method stub
}
});
}
}
Thanks
Deepak
You have to add on click method