How to bring activity to front using finish from another activity

Question

i have two activities: A and B.

from A to B:

onCreate

Context context = this;

onClick

Intent i = new Intent(context,B.class);
startActivity(i);

from B to A: (if B has a button to return to A)

button.setOnClickListener(new View.OnClickListener(){
   public void onClick(View v){
      finish();
   }
});

But if the flow is like:

A call B, the user that is watching B clicks Home button and click again B from launched activities and clicks the button to call finish(), it goes to Home and not to my first activity A. How can i do it?

EDIT:

flow

A->B // with startActivity(Intent);
B->Home // clicking home button on device
Home->B // clicking my app from launched activities
B.finish() -> Home and not A // finish or onBackPressed do the same

you can use activity single task and use intent to start the activity then only the last instance will be brought to front if an instance exists(and on create wont be executed) — Athul Harikumar, Mar 29 '13 at 11:26
yes.. so startActivity will bring that activity to the front instead creating new one — Jayyrus, Mar 30 '13 at 10:08

Monty · Accepted Answer · 2013-03-29T10:34:07.087

1

can you try this :-

WHY ARE YOUR USING getApplicationContext() instead of use this or Activity A name.

A ->B

 Intent i = new Intent(yourcurrentActivity,B.class);
 startActivty(i);

B ->A

call finish()

update if you are using this:- remove it

android:noHistory="true";

edited Mar 29 '13 at 10:34

answered Mar 29 '13 at 10:02

Monty

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i don't want to start again my A class.. i don't need to execute code inside onCreate – Jayyrus Mar 29 '13 at 10:05
u want to come at home or FirstActivity after finish() – Monty Mar 29 '13 at 10:07
FirstActivity.. but i don't need to create again FirstActivity but just bring it to front hiding the Second one – Jayyrus Mar 29 '13 at 10:08
no way.. (see edit) with myApplication instead getApplicationContext() it goes to home and not in firstActivity – Jayyrus Mar 29 '13 at 10:18
android:noHistory="false" in your manifest file with in your first activity or remove this....if u r using it. – Monty Mar 29 '13 at 10:21
i solved simply: Intent i = new Intent(getActivity(),MyFirstClass.class); getActivity().startActivity(i); getActivity().finish(); – Jayyrus Mar 29 '13 at 10:30
did you use this keyword or your activtity name instead of getApplicationContext..try this once because getActivity not a good idea. – Monty Mar 29 '13 at 10:33
that is a PreferenceFragment, i need to call getActivity :) – Jayyrus Mar 29 '13 at 10:43

score 0 · Answer 2 · answered Mar 29 '13 at 10:03

0

call

onBackPressed();

instead of

finish();

answered Mar 29 '13 at 10:03

Ercan

3,705
1
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sorry... but onBackPressed() do the same as finish() -> A->B, B->Home,Home->B,(B.onBackPressed() || B.finish()) -> Home and not A – Jayyrus Mar 29 '13 at 10:09

Linga · Answer 3 · 2013-03-29T10:20:57.973

0

Try this:

startActivity(new Intent(B.this,B.class));

and finish() in activity A as

// in your activity A
Intent i = new Intent(getApplicationContext(),B.class);
startActivity(i);
finish();

and

public void OnBackPressed()
{
finish();
}

edited Mar 29 '13 at 10:20

answered Mar 29 '13 at 10:04

Linga

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i don't want to start again A class – Jayyrus Mar 29 '13 at 10:04
sorry, but why i have to execute finish() on activity A? – Jayyrus Mar 29 '13 at 10:12
you say i don't want to start again A class. so it will finish activity A. otherwise when you press back button it will goto activity A – Linga Mar 29 '13 at 10:19

score 0 · Answer 4 · answered Mar 29 '13 at 10:04

0

Try this:

public void startActivityForResult (Intent intent, int requestCode)

answered Mar 29 '13 at 10:04

stefan

1

When posting code as your answer, also explain why and how it works. – Lukas Knuth Mar 31 '13 at 17:32

Dhaval Parmar · Answer 5 · 2013-03-29T10:42:29.873

check below code: i have 3 activity : MainActivity, A_Acvitiy, B_actiivty (Hope its worked as per your req..)

package com.example.androidtest;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;

public class MainActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

    public void callActivity(View v) {
        if (v.getId() == R.id.button1) {
            // A
            startActivity(new Intent(MainActivity.this, A_activity.class));
        }

        if (v.getId() == R.id.button2) {
            // B
            startActivity(new Intent(MainActivity.this, B_activity.class));
            if (GeneraClass.isFormB) {
                            GeneraClass.isFormB = false;
                finish();
            }
        }
    }
}

A_activity:

package com.example.androidtest;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;

public class A_activity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.a_layout);
    }

    public void callActivity(View v) {
        if (v.getId() == R.id.button1) {
            // B
            startActivity(new Intent(A_activity.this, B_activity.class));
                 finish();
        }

    }

}

b_activity:

package com.example.androidtest;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;

public class B_activity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);

        setContentView(R.layout.b_layout);
    }

    public void callActivity(View v) {
        if (v.getId() == R.id.home) {
            // home
            GeneraClass.isFormB = true;
            startActivity(new Intent(B_activity.this, MainActivity.class));
            finish();
        }

    }
}

my extra class:

package com.example.androidtest;

public class GeneraClass {

    public static boolean isFormB = false;
}

So, Home-->A(finish)-->B--->Home(if from b then finish)-->B-->Back--> Home --->Back--> exit App

How to bring activity to front using finish from another activity

5 Answers5