Android Multiple Intents - One Form
Solution 1:
@Meryl2 When u are using ""android:onClick="btnLogout"""
Then you should have corresponding method public void btnLogout(View view{ //your code here }
Same applies for all buttons in your code
Solution 2:
Your Mistakes ->
You have not used setcontentView() nor you overridden onCreate() method. One more thing, you are not sending intent correctly.
Here is how you can send intent
Intent intent = newIntent(getApplicationContext(), DestinationActivity.class);
startActivity(intent);
Solution 3:
I have modified the class and the layout. You need to create the other classes for each action.
publicclassMainActivityextendsActivityimplementsButton.OnClickListener{
@OverrideprotectedvoidonCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
}
@OverridepublicvoidonClick(View v) {
    intid= v.getId();
    Intentintent=null;
    if(id == R.id.btnHockey) {
        intent = newIntent(MainActivity.this, Hockey.class);
    } elseif(id == R.id.btnCurling) {
        intent = newIntent(MainActivity.this, Curling.class);
    } elseif(id == R.id.btnFootball) {
        intent = newIntent(MainActivity.this, Football.class);
    } elseif(id == R.id.btnLogout) {
        intent = newIntent(MainActivity.this, Logout.class);
    } elseif(id == R.id.btnLacrosse) {
        intent = newIntent(MainActivity.this, Lacrosse.class);
    }
    startActivity(intent);
}
}
<RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"><ImageViewandroid:id="@+id/imageView1"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_alignParentTop="true"android:layout_centerHorizontal="true"/><Buttonandroid:id="@+id/btnFootball"android:layout_below="@id/imageView1"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_marginTop="25dp"android:text="Football"android:onClick="onClick" /><Buttonandroid:id="@+id/btnHockey"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_below="@+id/btnFootball"android:layout_marginTop="25dp"android:text="Hockey"android:onClick="onClick" /><Buttonandroid:id="@+id/btnLacrosse"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_below="@+id/btnHockey"android:layout_marginTop="25dp"android:text="Lacrosse"android:onClick="onClick" /><Buttonandroid:id="@+id/btnCurling"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_below="@+id/btnLacrosse"android:layout_centerHorizontal="true"android:layout_marginTop="25dp"android:text="Curling"android:onClick="onClick" /><Buttonandroid:id="@+id/btnLogout"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_below="@+id/btnCurling"android:layout_centerHorizontal="true"android:layout_marginTop="25dp"android:text="Logout"android:onClick="onClick" />Solution 4:
I think i got your problem. In each Button you set the name of the method that will be used when you click on it :
android:onClick="btnCurling"
android:onClick="btnHockey"
...
But you only have one method here which is :
publicvoidButtonOnClick(View v){
    ...
}
One solution is to define each method like so :
publicclassMainMenuextendsActivity {
    protectedvoidonCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // here you tell your activity what layout he will display
        setContentView(R.layout.TheNameOfYourLayout);
    }
    // it will get there when you click on the "@+id/btnHockey" ButtonpublicvoidbtnHockey(View v) {
        Intentintent=newIntent(this, NameOfTheActivityToLaunch.class);
        startActivity(intent);
    }
    // then you add the other ones btnCurling, ...
}
Another solution is to set the Listener of each button programmatically :
publicclassMainMenuextendsActivityimplementsView.OnClickListener {
    protectedvoidonCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Here you tell your activity what layout he will display
        setContentView(R.layout.TheNameOfYourLayout);
        // This will find your button in the layout you just set // and then set this Class as your Listener
        findViewById(R.id.btnFootball).setOnClickListener(this);
        
        // Then set the listener of all your other buttons
    }
    @OverridepublicvoidonClick(View v) {
        
        switch (v.getId()) {
            case R.id.btnFootball:
                Intentintent=newIntent(this, NameOfTheActivityToLaunch.class);
                startActivity(intent);
                break;
            case R.id.btnHockey:
                Intentintent=newIntent(this, NameOfTheActivityToLaunch.class);
                startActivity(intent);
                break;
            
            // ...
        }   
    }
}
You also have to remove all the android:onClick="btnCurling" line in your XML Layout file for this solution to work.
Hope it helps cheers :)
Solution 5:
Try this code;
publicclassMainMenuextendsActivityimplementsOnClickListener {
Button btn_football,btn_hokey,btn_something; // add another button here@OverrideprotectedvoidonCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stubsuper.onCreate(savedInstanceState);
    setContentView(R.layout.yourlayout);
    btn_football = (Button)findViewById(R.id.btnFootball);
    // add another button here same way
    btn_football.setOnClickListener(this); 
    // add another button here same way @OverridepublicvoidonClick(View v) {
    // TODO Auto-generated method stubswitch(v.getId()){
    case R.id.btnFootball:
        Intentintent=newIntent(MainMenu.this,(nextclass_addhere).class);
        startActivity(intent);
        break;
    case R.id.another button:
      Intentintent=newIntent(MainMenu.this,(nextclass_addhere).class);
       startActivity(intent);  
    break;
    //.......add here another button with same way
 }
}
}
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