Moving from one activity to another Activity in Android

Question

I want to move from one activity to another  using virtual device   When I click on button to move  My emulator ones a dialog box showing unfortunately SMS1 has stopped working  SMS1 is my app name     Can anybody help me in correcting my code   MainActivity java   package com example sms1    import android os Bundle   import android app Activity   import android content Intent   import android view Menu   import android view View   import android view View OnClickListener   import android widget Button   import android widget TextView    public class MainActivity extends Activity implements OnClickListener     Button b1  TextView tv1    Override  protected void onCreate Bundle savedInstanceState         super onCreate savedInstanceState       setContentView R layout activity main       b1    Button  findViewById R id button1       tv1    TextView  findViewById R id textView1        b1 setOnClickListener this         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 void onClick View v           TODO Auto-generated method stub     Intent i   new Intent getApplicationContext   NextActivity class       startActivity i       setContentView R layout avtivity next            Here is the NextActivity  package com example sms1   import android os Bundle  import android app Activity  import android view Menu  import android widget TextView   public class NextActivity extends Activity    TextView tv1   Override protected void onCreate Bundle savedInstanceState        super onCreate savedInstanceState       setContentView R layout avtivity next       tv1    TextView  findViewById R id textView1        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         Manifest XML   lt  xml version  1 0  encoding  utf-8   gt   lt manifest xmlns android  http   schemas android com apk res android  package  com example sms1  android versionCode  1  android versionName  1 0   gt    lt uses-sdk     android minSdkVersion  8      android targetSdkVersion  17    gt    lt application     android allowBackup  true      android icon   drawable ic launcher      android label   string app name      android theme   style AppTheme   gt       lt activity         android name  com example sms1 MainActivity          android label   string app name   gt           lt intent-filter gt               lt action android name  android intent action MAIN    gt                lt category android name  android intent category LAUNCHER    gt           lt  intent-filter gt       lt  activity gt   lt  application gt    lt  manifest gt    NextActivityLayout   lt RelativeLayout xmlns android  http   schemas android com apk res android  xmlns tools  http   schemas android com tools  android layout width  match parent  android layout height  match parent  android paddingBottom   dimen activity vertical margin  android paddingLeft   dimen activity horizontal margin  android paddingRight   dimen activity horizontal margin  android paddingTop   dimen activity vertical margin  tools context   NextActivity   gt    lt TextView     android id    id textView1      android layout width  wrap content      android layout height  wrap content      android text  next activity    gt      lt  RelativeLayout gt    MainActivity Layout   lt RelativeLayout xmlns android  http   schemas android com apk res android  xmlns tools  http   schemas android com tools  android layout width  match parent  android layout height  match parent  android paddingBottom   dimen activity vertical margin  android paddingLeft   dimen activity horizontal margin  android paddingRight   dimen activity horizontal margin  android paddingTop   dimen activity vertical margin  tools context   MainActivity   gt    lt TextView     android id    id textView1      android layout width  wrap content      android layout height  wrap content      android text   string hello world    gt    lt Button     android id    id button1      android layout width  wrap content      android layout height  wrap content      android layout below    id textView1      android layout marginTop  80dp      android layout toRightOf    id textView1      android text  Button    gt    lt  RelativeLayout gt

User · Answer

public void onClick View v     startActivity new Intent getApplicationContext    Next class         it is direct way to move second activity and there is no need for call intent

User · Answer

First you have to declare the activity in Manifest  It is important  You can add this inside application like this

User · Answer

First You have to use this code in MainActivity java class   Override public void onClick View v           TODO Auto-generated method stub     Intent i   new Intent getApplicationContext   NextActivity class       startActivity i        You can pass intent this way   Second  add proper entry into manifest xml file    lt activity android name   NextActivity    gt    Now see what happens

User · Answer

Register your java class on Android manifest file   After that write this code on button click  startActivity new intent MainActivity this NextActivity class

User · Answer

Override public void onClick View v           TODO Auto-generated method stub     Intent intent   new Intent Activity1 this Activity2 class       startActivity intent

User · Answer

setContentView R layout avtivity next    I think this line of code should be moved to the next activity

User · Answer

button1 in activity2  code written in activity 2  button1 setOnClickListener new View OnClickListener                      public void onClick View v                           starting background task to update product                            Intent fp new Intent getApplicationContext   activity1 class                             startActivity fp                                     This might help

User · Answer

You can do  Intent i   new Intent classname this   targetclass class   startActivity i

User · Answer

Below code is working fine with Android 4 3   Intent i   new Intent this MainActivity2 class   startActivity i

User · Answer

You haven t defined NextActivity in the AndroidManifest xml file   Add these lines in android manifest after lt  activity gt  tag  It should work    lt activity     android name   NextActivity   gt   lt  activity gt    final code will be   lt application     android allowBackup  true      android icon   drawable app icon      android label   string app name   gt       lt activity         android name   MainActivity          android label  Main Activity   gt           lt intent-filter gt               lt action android name  android intent action MAIN    gt                lt category android name  android intent category LAUNCHER    gt           lt  intent-filter gt       lt  activity gt       lt activity         android name   NextActivity   gt       lt  activity gt   lt  application gt

User · Answer

When you have to go from one page to another page in android changes made in 2 files  Intent intentSignUP   new Intent this SignUpActivity class      startActivity intentSignUP     add activity in androidManifest file also like    lt activity android name   SignUpActivity  gt  lt  activity gt

User · Answer

Simply add your NextActivity in the Manifest XML file   lt activity             android name  com example sms1 NextActivity  gt               lt intent-filter gt                   lt action android name  android intent action MAIN    gt               lt  intent-filter gt           lt  activity gt

User · Answer

It is mainly due to unregistered activity in manifest file as  NextActivity  Firstly register NextActivity in Manifest like   lt activity android name   NextActivity  gt    then use the code in the where you want  Intent intent new Intent MainActivity this NextActivity class   startActivity intent     where you have to call the NextActivity

User · Answer

1  place setContentView R layout avtivity next   to the next-activity s onCreate   method just like this  main  activity s onCreate    2  if you have not defined the next-activity in your-apps manifest file then do this also  like    lt application         android allowBackup  true          android icon   drawable app icon          android label   string app name   gt           lt activity             android name   MainActivity              android label  Main Activity   gt               lt intent-filter gt                   lt action android name  android intent action MAIN    gt                    lt category android name  android intent category LAUNCHER    gt               lt  intent-filter gt           lt  activity gt           lt activity             android name   NextActivity              android label  Next Activity   gt           lt  activity gt       lt  application gt    You must have to perform the 2nd step every time you create a new activity  otherwise your app will crash

[android] Moving from one activity to another Activity in Android

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