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我一直在Android 4.1中引發NullPointer異常,同時在活動之間切換。任何想法爲什麼?Android 4.1 NullPointerException在活動之間
@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
}
粘貼NullPointerException的Logcat。 –
是否發生在JoinActivity和LoginActivity? – FoamyGuy
向我們展示堆棧跟蹤。幾乎總是會指向確切的路線。 –