startActivity in onclick

Question

have a simple Activity with a onClick method - it works but Android Studio marks startActivity red says cannot resolve method - so why?

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.lyt_start);
}

public void onClick(View v) {
    switch (v.getId()) {

        case R.id.btn1:

            Intent int_Update = new Intent(v.getContext(), aty_Update.class);

            startActivity(int_Update);

            break;

        case R.id.btn2:

            Intent int_Start = new Intent(v.getContext(), aty_Main.class);
            startActivity(int_Start);

            break;
    }
}

if startActivity is underlined red that means you project isn't configured correctly or building correctly. nothing is wrong with the code. Try to do a gradle sync, and i bet it will show you some errors or something. — Tomer Shemesh, Jul 08 '16 at 18:58
Hey you are my man - you're right - after doing it ... all errors are gone - it's magic - no ist Shemesh ;)) — Chad White, Jul 08 '16 at 19:28

score 0 · Answer 1 · edited May 23 '17 at 11:51

0

Don't use v.getContext(), use:

Intent int_Update = new Intent(this, aty_Update.class);

Or MyActivity.this instead.

Also, you're not setting a onClickListener correctly. Take a look at this link to learn how to do it properly.

edited May 23 '17 at 11:51

Community

1
1

answered Jul 08 '16 at 18:24

Vucko

7,371
2
27
45

I've done "this" before but Studio marks it red - error cannot resolve constructor – Chad White Jul 08 '16 at 18:31
have u used `getApplicationContext()` – Sahaj Rana Jul 08 '16 at 18:36
>Or `MyActivity.this` instead.< just replace with your activity name. – Vucko Jul 08 '16 at 18:37
You've replaced MyActivity with your activity's name? Man, did you change the way you tried to implement the onClick? Your way is wrong. – Vucko Jul 08 '16 at 18:53
sure I replaced it – Chad White Jul 08 '16 at 19:01
used it like here http://stackoverflow.com/questions/19464100/starting-intent-from-onclicklistener – Chad White Jul 08 '16 at 19:09

score 0 · Answer 2 · answered Jul 08 '16 at 18:51

Use the following code:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.lyt_start);
}

public void onClick(View v) {
    switch (v.getId()) {

        case R.id.btn1:

            activityStarter(aty_Update.class);

            break;

        case R.id.btn2:

            activityStarter(aty_Main.class);

            break;
}


       Intent int_Update;

public void activityStarter(Class<?> cls){
        int_Update = new Intent(getApplicationContext(), cls);
        startActivity(int_Update);
    }

activity starter app Inventor? – Chad White Jul 08 '16 at 18:57 — Chad White, Jul 08 '16 at 18:57
what error does it show in the app and android studio – Saini Jul 09 '16 at 09:45 — Saini, Jul 09 '16 at 09:45

startActivity in onclick

2 Answers2