Starting Activity in android

Question

I want to make an app which has two activities the first activity has a button to start the second activity. How do i create this this is my code which i want to execute for second activity.

public class Numbers extends Activity {
public static MediaPlayer mp = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_numbers);
ViewPager viewPager = (ViewPager)findViewById(R.id.view_pager);
ImagePagerAdapter adapter = new ImagePagerAdapter();
viewPager.setAdapter(adapter);
}

private class ImagePagerAdapter extends PagerAdapter {
private int[] mImages = new int[]  {R.drawable.no1,R.drawable.no2,R.drawable.no3,R.drawable.no4,R.drawable.no5,R.drawable.no6,R.drawable.no7,R.drawable.no8,R.drawable.no9,};
private int[] mAudio= new int[]{R.raw.one,R.raw.two,R.raw.three,R.raw.four,R.raw.five,R.raw.six,R.raw.seven,R.raw.eight,R.raw.nine,};
@Override
public int getCount() {
return mImages.length;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view == ((ImageView) object);
       }
     @Override
     public Object instantiateItem(ViewGroup container, int position) {
     Context context = Numbers.this;
     ImageView imageView = new ImageView(context);
     int padding =context.getResources().  
     getDimensionPixelSize(R.dimen.activity_vertical_margin);
     imageView.setPadding(padding, padding, padding, padding);
     imageView.setScaleType(ImageView.ScaleType.CENTER);
     imageView.setImageResource(mImages[position]);
     ((ViewPager) container).addView(imageView, 0);

if (mp != null) {mp.reset();
mp.release();
}
mp = MediaPlayer.create(Numbers.this,mAudio[position]);
mp.start();
return imageView;
            }

@Override
public void destroyItem(ViewGroup container, int position, Object object) {
((ViewPager) container).removeView((ImageView) object);
}
}
}

do i need to create two different layout activity in xml?

Hariharan · Accepted Answer · 2014-01-10T09:04:05.147

Try this..

    Button bt= (Button) findViewById(R.id.yourbtn_id);
    bt.setOnClickListener(new OnClickListener(){
        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
                Intent intent = new Intent(FirstActivity.this, Numbers.class);
                startActivity(intent);
        }           
    });

Or

XML:

 <Button 
    android:id="@+id/yourbtn_id"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:onClick="BtnClick"
    android:text="Button" />

JAVA:

    public void BtnClick(View view) {
                Intent intent = new Intent(FirstActivity.this, Numbers.class);
                startActivity(intent);
    }

don't forget to add in manifest.

    <activity
        android:name=".Numbers"/>

score 0 · Answer 2 · answered Jan 10 '14 at 08:56

0

add this to your 1st class:

public void goTo(View view) {
    Intent intent = new Intent();
    intent.setClass(this, 2ndClassActivity.class);
    startActivity(intent);
}

and in xml design add this line to the button:

android:onClick="goTo"

answered Jan 10 '14 at 08:56

lantonis

143
14

i have added this code properly but my first activity is not getting launched after making changes in mainfest.xml... it just launch & displaying black window nothin else :( – SuRaj Creator Jan 10 '14 at 11:26

score 0 · Answer 3 · answered Jan 10 '14 at 08:56

0

In your first Activity, when button is pressed, do:

Intent intent = new Intent(this, Numbers.class);
startActivity(intent);

You need to have Numbers Activity in AndroidManifest too:

<activity android:name=".Numbers"></activity>

answered Jan 10 '14 at 08:56

Melquiades

8,496
1
31
46

score 0 · Answer 4 · answered Jan 10 '14 at 08:57

0

Add the following to the onClick method or Listener of the button.

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

answered Jan 10 '14 at 08:57

stefana

2,606
3
29
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Note :`this` does not refer to activity context in annonymous inner class. should be `ActivityName.this` – Raghunandan Jan 10 '14 at 08:59
If a Listener is used, then yes. – stefana Jan 10 '14 at 08:59

score 0 · Answer 5 · edited Jan 10 '14 at 09:03

0

yourButton.setOnClickListener( new OnClickListener() {

   @Override
   public void onClick(View v) {

   Intent intent = new Intent(getApplicationContext() , NextActivity.class);

   startActivity(intent);

   }
});

edited Jan 10 '14 at 09:03

wenincode

376
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answered Jan 10 '14 at 08:57

Nitesh Tiwari

4,742
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score 0 · Answer 6 · answered Jan 10 '14 at 09:07

0

yes you have to create two layouts..one for first activity which have your button and second layout for another activity in which you execute

refer to : http://theopentutorials.com/tutorials/android/android-sending-data-from-one-activity-to-another/

answered Jan 10 '14 at 09:07

krishna

235
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Starting Activity in android

6 Answers6