Move from One Tab to Another Tab on click event

Question

I have created an app with 5 tabs, in my 1st tab I am having a button on click of which I want to go to tab3. This is my code of button event --

moreButton3.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        Intent intent = new Intent(view.getContext(), Tab3_Image.class);
        view.getContext().startActivity(intent);
    }
});

But while clicking the button the app crash, below is the logcat error --

E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.s2s.doupnow, PID: 22481
java.lang.NullPointerException
    at com.s2s.doupnow.Tab1_Home$6.onClick(Tab1_Home.java:313)
    at android.view.View.performClick(View.java:4444)
    at android.view.View$PerformClick.run(View.java:18457)
    at android.os.Handler.handleCallback(Handler.java:733)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:136)
    at android.app.ActivityThread.main(ActivityThread.java:5113)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:515)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:796)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:612)
    at dalvik.system.NativeStart.main(Native Method)

Shivam Oberoi · Answer 1 · 2018-01-12T08:20:06.977

0

Change this -:

moreButton3.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                Intent intent = new Intent(view.getContext(), Tab3_Image.class);
                view.getContext().startActivity(intent);
            }
        });

To-:

private Context context=this;   //make it global

Button moreButton3=(Button)findViewById(R.id.buttoninxml);
moreButton3.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                Intent intent = new Intent(context, Tab3_Image.class);
                startActivity(intent);
            }
        });

edited Jan 12 '18 at 08:20

answered Jan 12 '18 at 08:08

Shivam Oberoi

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why 2 times setOnClickListener() is called? – Dinesh Kumar Jan 12 '18 at 08:18
check now its edited... – Shivam Oberoi Jan 12 '18 at 08:20
tried, but getting the same problem – Dinesh Kumar Jan 12 '18 at 08:20
Have you initialized the button and same as referred in xml file. – Shivam Oberoi Jan 12 '18 at 08:21
ya initialized the button – Dinesh Kumar Jan 12 '18 at 09:10

Move from One Tab to Another Tab on click event

1 Answers1