Button btnEditor;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
btnEditor = (Button) findViewById(R.id.btnEditor);
//some code
btnEditor.setOnClickListener(new View.OnClickListener(){
public void onClick(View arg0) {
}
});
}
btnEditor.setOnClickListener(new View.OnClickListener()
gives me a Null Pointer Exception . btnEditor is earlier connecter to XML Button by: btnEditor = (Button) findViewById(R.id.btnEditor);
In my main.xml file:
<Button
android:id="@+id/btnEditor"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="16dp"
android:text="Editor"
android:textSize="48dp"
android:textStyle="bold"
android:typeface="normal" android:layout_gravity="bottom"/>
Seriously, I have no idea what to do...
RESOLVED
I forgot that I had two main.xml
files:
One of them (in large dir) didn't contain a Button inside, so I got an error while running application on device using large layout.
Most likely you haven't called setContentView()
with the layout
that this Button
is in or else you haven't called setContentView()
before this line
btnEditor = (Button) findViewById(R.id.btnEditor);
either of these situations would give a NPE
at that line and would be the only reason for it. If you think you are then please post how you are doing this.
try to do next:
write this as global variable
Button btnEditor ;
in your on create() write
btnEditor = (Button) findViewById(R.id.btnEditor);
btnEditor.setOnClickListener(new View.OnClickListener(){
public void onClick(View arg0) {
}
});
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