I am getting a nullpointerexception error on this line
btn10.setOnClickListener(this);
this is the entire java
package com.james.helloandroid2;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;
//** activity
public class HelloAndroid2 extends Activity implements OnClickListener, ColorPickerDialog.OnColorChangedListener {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.pokertable);
//** imagebuttons
ImageView button10 = (ImageView) findViewById(R.id.button10);
button10.setOnClickListener(this);
View btn9 = (View) findViewById(R.id.button9);
//btn9.setOnClickListener(this);
View btn8 = (View) findViewById(R.id.button8);
//btn8.setOnClickListener(this);
View btn7 = (View) findViewById(R.id.button7);
//btn7.setOnClickListener(this);
View btn6 = (View) findViewById(R.id.button6);
//btn6.setOnClickListener(this);
View btn5 = (View) findViewById(R.id.button5);
//btn5.setOnClickListener(this);
View btn4 = (View) findViewById(R.id.button4);
//btn4.setOnClickListener(this);
View btn3 = (View) findViewById(R.id.button3);
//btn3.setOnClickListener(this);
View btn2 = (View) findViewById(R.id.button2);
//btn2.setOnClickListener(this);
View btn1 = (View) findViewById(R.id.button1);
//btn1.setOnClickListener(this); {
}
//** not in use yet.
public void colorChanged(int color) {
// TODO Auto-generated method stub
}
public void onClick(View v) {
// TODO Auto-generated method stub
ColorPickerDialog dialog = new ColorPickerDialog(this, null, 0);
dialog.show();
}
}
im not sure why if anyone could help.
also just a ps. i have certain things forward slashed so they are exempt in my code.. more of notes for me or code im waiting to actually use.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/relativeLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="clip_horizontal"
android:layout_weight="0.20"
android:background="@drawable/tablebackground"
android:gravity="top" >
<ImageView
android:id="@+id/button8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:text="@string/seat5"
android:src="@drawable/shapebutton5" />
<ImageView
android:id="@+id/button10"
android:layout_width="55dp"
android:layout_height="40dp"
android:layout_marginTop="5dp"
android:layout_centerHorizontal="true"
android:src="@drawable/shapebutton10" />
<ImageView
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:layout_marginLeft="31dp"
android:layout_toRightOf="@+id/button10"
android:onClick="onMyButtonClick"
android:src="@drawable/shapebutton1" />
<ImageView
android:id="@+id/button7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:layout_marginRight="30dp"
android:layout_toLeftOf="@+id/button10"
android:src="@drawable/shapebutton9" />
<ImageView
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/button7"
android:layout_alignParentBottom="true"
android:src="@drawable/shapebutton6" />
<ImageView
android:id="@+id/button6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/button3"
android:layout_alignParentBottom="true"
android:src="@drawable/shapebutton4" />
<ImageView
android:id="@+id/button5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/button6"
android:layout_alignParentRight="true"
android:layout_marginRight="25dp"
android:src="@drawable/shapebutton3" />
<ImageView
android:id="@+id/button4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/button5"
android:layout_below="@+id/button3"
android:src="@drawable/shapebutton2" />
<ImageView
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/button5"
android:layout_alignBottom="@+id/button5"
android:layout_alignParentLeft="true"
android:layout_marginLeft="19dp"
android:src="@drawable/shapebutton7" />
<ImageView
android:id="@+id/button9"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/button4"
android:layout_alignBottom="@+id/button4"
android:layout_alignLeft="@+id/button1"
android:src="@drawable/shapebutton8" />
</RelativeLayout>
01-18 23:09:31.842: D/AndroidRuntime(810): Shutting down VM
01-18 23:09:31.842: W/dalvikvm(810): threadid=1: thread exiting with uncaught exception (group=0x40015560)
01-18 23:09:31.852: E/AndroidRuntime(810): FATAL EXCEPTION: main
01-18 23:09:31.852: E/AndroidRuntime(810): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.james.helloandroid2/com.james.helloandroid2.HelloAndroid2}: java.lang.NullPointerException
01-18 23:09:31.852: E/AndroidRuntime(810): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
01-18 23:09:31.852: E/AndroidRuntime(810): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
01-18 23:09:31.852: E/AndroidRuntime(810): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
01-18 23:09:31.852: E/AndroidRuntime(810): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
01-18 23:09:31.852: E/AndroidRuntime(810): at android.os.Handler.dispatchMessage(Handler.java:99)
01-18 23:09:31.852: E/AndroidRuntime(810): at android.os.Looper.loop(Looper.java:123)
01-18 23:09:31.852: E/AndroidRuntime(810): at android.app.ActivityThread.main(ActivityThread.java:3683)
01-18 23:09:31.852: E/AndroidRuntime(810): at java.lang.reflect.Method.invokeNative(Native Method)
01-18 23:09:31.852: E/AndroidRuntime(810): at java.lang.reflect.Method.invoke(Method.java:507)
01-18 23:09:31.852: E/AndroidRuntime(810): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
01-18 23:09:31.852: E/AndroidRuntime(810): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
01-18 23:09:31.852: E/AndroidRuntime(810): at dalvik.system.NativeStart.main(Native Method)
01-18 23:09:31.852: E/AndroidRuntime(810): Caused by: java.lang.NullPointerException
01-18 23:09:31.852: E/AndroidRuntime(810): at com.james.helloandroid2.HelloAndroid2.onCreate(HelloAndroid2.java:23)
01-18 23:09:31.852: E/AndroidRuntime(810): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
01-18 23:09:31.852: E/AndroidRuntime(810): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
01-18 23:09:31.852: E/AndroidRuntime(810): ... 11 more
Are you defining your
ImageViews inR.layout.pokertable?Activity.findViewByIdisn’t magical, it simply performs a recursive search down the view hierarchy attached to an activity’s current window. If you haven’t attached these views by usingsetContentViewyet,findViewByIdwill return null because there were no matching views present to find.Maybe posting your Activity’s XML layout file will help us pin-point the problem.