Android Button Onclick

Question

OK I m new to android dev s and Java  so I m having problems with on click method here s my code  I know I ve gotta be close  thanks in advance  All I want my button to do is  when its clicked on the phone to switch the layout view from main xml to xx xml  package my project   import android app Activity  import android os Bundle   import android view View  import android view View OnClickListener  import android widget Button   public class ExperiencerlActivity extends Activity           Called when the activ enter code here ity is first created          Override     public void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           setContentView R layout main                 Button button    Button  findViewById R id button1            button setOnClickListener new OnClickListener                 public void onClick View v                       TODO Auto-generated method stub                                     Here is my button code   lt Button     android id    id button1      android layout width  wrap content      android layout height  wrap content      android layout above    id linearLayout1      android layout centerHorizontal  true      android layout marginBottom  56dp      android onClick  setLogin      android text  Login    gt

User · Answer

It would be helpful to know what code you are trying to execute when the button is pressed. You've got the onClick property set in your xml file to a method called setLogin. For clarity, I'd delete this line android:onClick="setLogin" and call the method directly from inside your onClick() method.

Also you can't just set the display to a new XML, you need to start a new activity with an Intent, a method something like this would be appropriate

 private void setLogin() {

 Intent i = new Intent(currentActivity.this, newActivity.class);
 startActivty(i);

 }

Then set the new Activity to have the new layout.

User · Answer

You need to make the same method name both in layout XML and java code   If you use android onClick  setLogin  then you need to make a method with the same name  setLogin      Please be noted that you need to add the  View v  parameter public void setLogin View v         ADVICE  Do not mix layout with code by using android onClick tag in your XML  Instead  move the click method to your class with OnClickListener method like   Button button    Button  findViewById R id button1   button setOnClickListener new OnClickListener       public void onClick View v           TODO Auto-generated method stub            Make a layout just for layout and no more  It will save your precious time when you need to refactoring for Supporting Multiple Screens

User · Answer

Method 1   public void onClick View v              Intent i   new Intent currentActivity this  SecondActivity class            startActivty i               Method 2   Button button    Button  findViewById R id mybutton    button setOnClickListener new OnClickListener          public void onClick View v             Toast makeText this   Button Clicked   Toast LENGTH LONG  show

User · Answer

Use something like this       public void onClick View v                   TODO Auto-generated method stub            startActivity new Intent  com droidnova android splashscreen MyApp

User · Answer

Here is some sample code of how to add a button named Add  You should declare the variable as a member variable  and the naming convention for member variables is to start with the letter  m    Hit Alt Enter on the classes to add the missing references   Add this to your activity main xml     lt Button         android id    id buttonAdd          android layout width  wrap content          android layout height  wrap content          android text  ADD         gt    Add this to your MainActivity java   public class MainActivity extends AppCompatActivity        Button mButtonAdd         Override     protected void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           setContentView R layout activity main           mButtonAdd   findViewById R id buttonAdd            mButtonAdd setOnClickListener new View OnClickListener                 public void onClick View v                       do something here

User · Answer

this will sort it for you   Override protected void onCreate Bundle savedInstanceState        super onCreate savedInstanceState       setContentView R layout activity main        Button but1  Button findViewById R id button1        but1 setOnClickListener new View OnClickListener              Override         public void onClick View v                 Intent int1  new Intent MainActivity this xxactivity class               startActivity int1                         You just need to amend the xxactivity to the name of your second activity

User · Answer

There are two solutions for this are  -   1  do not put onClick in xml   2  remove   button setOnClickListener new OnClickListener         public void onClick View v                   TODO Auto-generated method stub             and put  public void setLogin View v           Your code here

User · Answer

If you write like this in Button tag in xml file     android onClick  setLogin  then   Do like this    lt  xml version  1 0  encoding  utf-8   gt   lt LinearLayout xmlns android  http   schemas android com apk res android  android layout width  fill parent  android layout height  fill parent  android orientation  vertical   gt    lt Button     android id    id button1      android layout width  fill parent      android layout height  wrap content      android text   string btn      android onClick  onClickBtn    gt    lt  LinearLayout gt    and in Code part   public class StartUpActivity extends Activity        public void onCreate Bundle savedInstanceState                super onCreate savedInstanceState          setContentView R layout main                  public void onClickBtn View v                Toast makeText this   Clicked on Button   Toast LENGTH LONG  show               and no need all this    Button button    Button  findViewById R id button1    button setOnClickListener new OnClickListener          public void onClick View v               TODO Auto-generated method stub               Check it once

User · Answer

Use Layout inflater method in your button click  it will change your current  xml to targeted  xml file   Google for layout inflater code

[java] Android Button Onclick

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