在活动之间切换时,我不断在 Android 4.1 中抛出 NullPointer 异常。关于为什么的任何想法?
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_launch);
Button login = (Button)findViewById(R.id.login_button);
Button join = (Button)findViewById(R.id.join_button);
login.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent i = new Intent(LaunchActivity.this, LoginActivity.class);
startActivity(i);
}});//END OF CLICK
join.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent i = new Intent(LaunchActivity.this, JoinActivity.class);
startActivity(i);
}});//END OF CLICK
}