I have two java files Main and New. In main i have a number methods from oncreate to surface destroyed. on clicking one of the button it goes to New. There i have called the same xml file. But no methods are working there. i want to call the oncreate method including all methods from New. Please help
public class Main extends Activity implements SurfaceHolder.Callback {
#Override
protected void onCreate(Bundle savedInstanceState)
{ super.onCreate(savedInstanceState);
setContentView(R.layout.main);
...............}
buttonStartCameraPreview.setOnClickListener(new Button.OnClickListener()
{
#Override
public void onClick(View v)
{......}
});
testButton.setOnClickListener(new Button.OnClickListener(){
#Override
public void onClick(View v)
{
Intent nextIntent=new Intent(getApplicationContext(),New.class);
startActivityForResult(nextIntent,301);
}
});
Second class
public class New extends Activity
{
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
}
Your second class name is NewActivity
but Your intent is calling different class.
->Intent nextIntent=new Intent(getApplicationContext(),New.class);
replace to
Intent nextIntent=new Intent(getApplicationContext(),NewActivity.class);
You can also create a base activity that both MainActivity and NewActivity extends and put methods in it.
For ex:
public class BaseActivity extends Activity{
protected void onCreate(Bundle savedInstanceState)
{ super.onCreate(savedInstanceState);
setContentView(R.layout.main);
...............}
buttonStartCameraPreview.setOnClickListener(new Button.OnClickListener()
{
#Override
public void onClick(View v)
{......}
});
testButton.setOnClickListener(new Button.OnClickListener(){
#Override
public void onClick(View v)
{
Intent nextIntent=new Intent(getApplicationContext(),NewActivity.class);
startActivityForResult(nextIntent,301);
}
});
}
public class MainActivity extends BaseActivity{
onCreate..
{
...
}
}
public class NewActivity extends BaseActivity{
onCreate..
{
...
}
}
Related
I'm having an Issue that I have two Activities A and B when I clicked on Button to change an Activity from A to B . It Restart my Application I don't know what going wrong Please help me
public class Login_Choice_Activity extends AppCompatActivity{
private Button d_btn,p_btn;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login__choice);
FindAllView();
p_btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// startActivity(new
Intent(Login_Choice_Activity.this,Patient_SignIn_Activity.class));
Toast.makeText(getApplicationContext(),"CLICKED",Toast.LENGTH_LONG).show();
}
});
}
private void FindAllView(){
d_btn = findViewById(R.id.choice_doctor_btn);
p_btn = findViewById(R.id.choice_patient_btn);
}
}
https://i.stack.imgur.com/KcgAh.gif
It could be better if you create a method for opening the new Activity and call it from onClick(View v) method. Example
private void openActivity() {
startActivity(new Intent(this,Patient_SignIn_Activity.class));
}
In your onClick call:
#Override
public void onClick(View v) {
openActivity()
}
I devised some activities with its relationships between each other after I pass any acttivity from Main Actvity. But I couldn't succeed to pass another activity from any activity.
Here is the code below.
public class A extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_istanbul);
TextView attractivePlaces = (TextView) findViewById(R.id.a_category_attractive_places);
attractivePlaces.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(),"A",Toast.LENGTH_SHORT).show();
Intent intent = new Intent(A.this,B.class); // Here the issue is.
startActivity(intent);
}
});
}
}
How can I solve the problem.
Try changing View.OnClickListener() to TextView.OnClickListener()
final code would be like this:
public class A extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_istanbul);
TextView attractivePlaces = (TextView) findViewById(R.id.a_category_attractive_places);
attractivePlaces.setOnClickListener(new TextView.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(),"A",Toast.LENGTH_SHORT).show();
Intent intent = new Intent(A.this,B.class); // Here the issue is.
startActivity(intent);
}
});
}
}
Maybe this will help.
I have made successfully my Imagebutton to open anther activity but the issue is by using the same method on another ImageButton it comes up with an error saying the method is already used in "Main Activity".
public class MainActivity extends ActionBarActivity {
private static ImageButton ImageButton_sbm;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
OnClickImageButtonListener();
}
public void OnClickImageButtonListener() {
ImageButton_sbm = (ImageButton)findViewById(R.id.imageButton);
ImageButton_sbm.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent("saintbedeslytham.saintbedes.event");
startActivity(intent);
}
}
);
}
private static ImageButton ImageButton2_sbm;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
OnClickImageButtonListener();
}
public void OnClickImageButtonListener() {
ImageButton_sbm = (ImageButton)findViewById(R.id.imageButton2);
ImageButton_sbm.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent("saintbedeslytham.saintbedes.news");
startActivity(intent);
}
}
);
}
How, if anything, can I apply another method for the "saintbedeslytham.saintbedes.news"
Your problem here is that you cannot create two method with the same definition.
You have two:
protected void onCreate(Bundle savedInstanceState);
and two:
public void OnClickImageButtonListener();
You can't have 2 methods with the same definition for 2 simple reasons.Imagine 2 people with the same name, call for their name.
Who will answer?
Who are you calling?
Edit:
So you can:
public class MainActivity extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
prepareClicks();
}
private void prepareClicks() {
findViewById(R.id.imageButton).setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent("saintbedeslytham.saintbedes.event");
startActivity(intent);
}
}
);
findViewById(R.id.imageButton2).setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent("saintbedeslytham.saintbedes.news");
startActivity(intent);
}
}
);
}
}
public class MainActivity extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
prepareClicks();
}
private void prepareClicks() {
findViewById(R.id.imageButton).setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent("saintbedeslytham.saintbedes.event");
startActivity(intent);
}
}
);
findViewById(R.id.imageButton2).setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent("saintbedeslytham.saintbedes.news");
startActivity(intent);
}
}
);
}
}
Yup the method worked.
Thanks for the replies,
(Done by Gorcyn)
I have a button which I am assigning an OnClickListener to. I want to start a new intent as a result of this. In order to do that, I have to reference the activity. The only one I know how to do this is via something like the following code. Is this the best way to start an intent from a button click? Also, what kind of memory implications will there be for this?
public class SomeActivity extends FragmentActivity {
private final FragmentActivity self=this;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
findViewById(R.id.startButton).setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
Intent intent=new Intent(self,someClass.class);
startActivity(intent);
}
});
}
The best way to do this is to simply pass ActtivityName.this, like this:
public class SomeActivity extends FragmentActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
findViewById(R.id.startButton).setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
Intent intent=new Intent(SomeActivity.this,someClass.class);
startActivity(intent);
}
});
}
Another way to do this will be calling :
findViewById(R.id.startButton).setOnClickListener(this);
Then make your Activity implement View.OnClickListener and implement the methods onClick(View v) in this way :
public void onClick(View v) {
switch(v.getId()) {
case R.id.startButton:
Intent intent=new Intent(self,someClass.class);
startActivity(intent);
break;
// Handle click on other views
}
}
It prevents from instantiating a listener and should be a bit better for memory consumption.
I have an Android App That requires a button to open up a new xml page. This is what it's like now, could someone add the necessary code to make it open Page2Activity when I click on the button? Code:
public class MainActivity extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Void onClick;View arg0; {
// TODO Auto-generated method stub
}
};
}
I figured this out using this method : http://stackoverflow.com/questions/4094103/linking-xml-pages-with-layout ,but I will try All of yours as well.
Try this code:
public void handleClick(View v){
//Create an intent to start the new activity.
Intent intent = new Intent();
intent.setClass(this,Page2Activity.class);
startActivity(intent);
}
Then create a new cLass called Page2Activity.
Hope this helps and don't forget to add your activity to the manifest file.
i think you mean something like this:
public class MyClass extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button button1 = (Button)findViewById(R.id.button1);
button1.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent("com.myaction");
startActivity(i);
}
});
}
}