Hi all,
Hopefully one of you can minus and divide my problem by enlightening me.

I have an java file with a button inside, what it does is ( setContentView(R.layout.main2); )
in main2, i also have another button.
And i want that button to link it back to the first page.

Code: Select all


button2.setOnClickListener(new View.OnClickListener() {
public void onClick(View view){
setContentView(R.layout.main)}



But apparently i keep getting null pointer exception error in logcat.

The question is, if i have a java file, and i need to change layout, where do i code the 2nd button ?
( there is 1 button in main , and 1 button in main2)
Pls revert asap. Million Thanks !!

You may try to use Intents to switch between activities or try using a ViewFlipper

Is your NPE on button2?

Did you use findViewById(R.id.button2); ?

vengeance is right would probably be better to switch activities but this is dependant on what you want to achieve

Thanks i sorta got it fixed with some help from ppl!!!

Anyone knows where i can go to read about proxy, cause i m currently doing a location base service which requires the pulling of data from a server. The emulator is able to pull out the results, but apparently on the phone , due to security issues there are some issues with the results.
Please Advice,







Anyone here plays FrontierVille???? message me for invite
Lvl 12