CODEWITHSUNDEEP
androidbuttonandroid-activity
Crazyfool
Crazyfool

Reputation: 15

Linking buttons on android

I cant seem to link more than one button on a page. The page basically has a heading, and 3 buttons below that which link to 3 different topics The code that i have tried (which i found on this site) was:

   package com.ICTrevisionapp;

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

    public class topicstoquiz extends Activity {
        /** Called when the activity is first created. */
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.topics);}
        public void onClick(View v) {
        {
            Button clickedButton = (Button) v;
            setContentView(0);
            switch(clickedButton.getId())
            {
            case R.id.button2:
                    setContentView(R.layout.topic1);
                Intent myIntent = new Intent (v.getContext(),topicstotopicone.class);
                startActivityForResult(myIntent, 0);
                break;
            case R.id.button3:
                setContentView(R.layout.topic2);
                break;
            }
        }
    }

The case part.

I have also tried the code:

        Intent myIntent = new Intent (view.getContext(),topicstoquiz.class);
        startActivityForResult(myIntent, 0);

but I can only seem to get It to link to one activity and only from one button.

Im probably doing this completely wrong, so how would I link each button on the page, to a seperate activity so I can link them to other pages. (If that makes sense)

Upvotes: 1

Views: 2876

Answers (4)

sherif
sherif

Reputation: 2332

Button myButton = (Button) findViewById(R.id.my_button);
myButton.setOnClickListener ( or something like that)

Upvotes: 0

bschultz
bschultz

Reputation: 4254

I prefer to go "the long way" about this:

In your onCreate:
Button button2 = (Button)findViewById(R.id.button2);
button2.setOnClickListener(yourListener);

Then create the listener method:
private OnClickListener yourListener = new OnClickListener(){
public void onClick(View v){
Intent yourIntent = new Intent(yourCurrentActivity.this, classYoureNavigatingToo.class);
startActivity(yourIntent);
}
};

So you can set up separate listeners for each button, pointing to a different class. If it helps don't forget to mark as answer!

Update:

public class topicstoquiz extends Activity {
/** Called when the activity is first created. */
@Override protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.topics);
Button button2 = (Button)findViewById(R.id.button2);
Button button3 = (Button)findViewById(R.id.button3);
Button button4 = (Button)findViewById(R.id.button4);
button2.setOnClickListener(button2Listener);
button3.setOnClickListener(button3Listener);
button4.setOnClickListener(button4Listener);
}

Set up your click listeners like I showed above. You are specifing your activity in your AndroidManifest.xml correct? Post stack trace result when you get the force close please.

Upvotes: 2

mseo
mseo

Reputation: 3911

You could also user the android:onClick Attribute which you set in your xml-layout for the corresponding buttons. This eliminates the need for switch-case completely.

android:onClick="onClickYourFirstButton"

In your activity class add the onClick method

public void onClickYouFirstButton(View v) {

http://developer.android.com/reference/android/view/View.html#attr_android%3aonClick

Upvotes: 1

Richard Lewin
Richard Lewin

Reputation: 1870

For multiple buttons I personally prefer a switch statement method similar to what you have done. First, impliment the OnClickListner into your activity then impliment the switch.

    public class MainActivity extends Activity implements OnClickListener {...

then inside the activity:

    public void onClick(View view) {
        Intent i;

        switch(view.getId()) {

        case R.id.buttonOneId:

            i = new Intent(getApplicationContext(), Activity1.class);
                    startActivity(i);   
            break;

        case R.id.buttonTwoId:

            i = new Intent(getApplicationContext(), Activity2.class);
                    startActivity(i);   
            break;
        }
    }

To enable that function to work with the buttons in the activity do this for each button:

 Button button = (Button) findViewById(R.id.buttonId);
   button.setOnClickListener(this);

alternative, the OnClickListner can be set in-line like so:

   Button button = (Button) findViewById(R.id.buttonId);
   button.setOnClickListener(new OnClickListener(){
        @Override
        public void onClick(View v){
            Intent i = new Intent(getApplicationContext(), Activity.class);
            startActivity(i);
        }
    });

if using the in-line method, repeat the code for the other buttons.

Upvotes: 1

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