NullPointerException when creating ImageButton

Question

I have an ImageButton I just added in my layout, but when I call setContentView on the layout my program is now crashing. Looking at logcat, it seems to give me a NullPointerException when trying to create this ImageButton. ic_menu_send.png is in the appropriate drawable folders. Here's the xml for the ImageButton:

<ImageButton
    android:id="@+id/imageButton1"
    android:src="@drawable/ic_menu_send"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignBottom="@id/enterPassword2"
    android:layout_alignRight="@id/enterPassword1"
    android:layout_alignTop="@id/enterPassword2"
    android:background="@style/AppTheme"
    android:contentDescription="@string/submit_button" />

And here is the onCreate for this Activity:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.first_time); // causes nullpointerexception
    EditText enterPassword1 = (EditText)findViewById(R.id.enterPassword1);
    enterPassword1.setOnEditorActionListener(new TextView.OnEditorActionListener() {
        @Override
        public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
            return onEditAction(v);
        }
    });
    EditText enterPassword2 = (EditText)findViewById(R.id.enterPassword2);
    enterPassword2.setOnEditorActionListener(new TextView.OnEditorActionListener() {
        @Override
        public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
            return onEditAction(v);
        }
    });
    /*ImageButton submit1 = (ImageButton)findViewById(R.id.imageButton1);
    submit1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            EditText enterPassword1 = (EditText)findViewById(R.id.enterPassword1);
            onEditAction(enterPassword1);
        }
    });*/

The ImageButton part of the code was only commented out for testing, but the program crashes much earlier. Does anyone have an idea of what may be causing this? Thank you for your assistance.

Edit: Here are the logcat logs:

01-27 15:52:11.264: E/AndroidRuntime(31195): FATAL EXCEPTION: main
01-27 15:52:11.264: E/AndroidRuntime(31195): java.lang.RuntimeException: Unable to start activity ComponentInfo{us.securecow.nearfieldunlock/us.securecow.nearfieldunlock.FirstTimeActivity}: android.view.InflateException: Binary XML file line #50: Error inflating class android.widget.ImageButton
01-27 15:52:11.264: E/AndroidRuntime(31195):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at android.app.ActivityThread.access$600(ActivityThread.java:141)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at android.os.Handler.dispatchMessage(Handler.java:99)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at android.os.Looper.loop(Looper.java:137)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at android.app.ActivityThread.main(ActivityThread.java:5039)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at java.lang.reflect.Method.invokeNative(Native Method)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at java.lang.reflect.Method.invoke(Method.java:511)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at dalvik.system.NativeStart.main(Native Method)
01-27 15:52:11.264: E/AndroidRuntime(31195): Caused by: android.view.InflateException: Binary XML file line #50: Error inflating class android.widget.ImageButton
01-27 15:52:11.264: E/AndroidRuntime(31195):    at android.view.LayoutInflater.createView(LayoutInflater.java:613)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at android.view.LayoutInflater.onCreateView(LayoutInflater.java:660)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:685)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:270)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at android.app.Activity.setContentView(Activity.java:1881)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at us.securecow.nearfieldunlock.FirstTimeActivity.onCreate(FirstTimeActivity.java:19)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at android.app.Activity.performCreate(Activity.java:5104)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
01-27 15:52:11.264: E/AndroidRuntime(31195):    ... 11 more
01-27 15:52:11.264: E/AndroidRuntime(31195): Caused by: java.lang.reflect.InvocationTargetException
01-27 15:52:11.264: E/AndroidRuntime(31195):    at java.lang.reflect.Constructor.constructNative(Native Method)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at android.view.LayoutInflater.createView(LayoutInflater.java:587)
01-27 15:52:11.264: E/AndroidRuntime(31195):    ... 24 more
01-27 15:52:11.264: E/AndroidRuntime(31195): Caused by: android.content.res.Resources$NotFoundException: Resource is not a Drawable (color or path): TypedValue{t=0x1/d=0x7f050001 a=-1 r=0x7f050001}
01-27 15:52:11.264: E/AndroidRuntime(31195):    at android.content.res.Resources.loadDrawable(Resources.java:1927)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at android.content.res.TypedArray.getDrawable(TypedArray.java:601)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at android.view.View.<init>(View.java:3328)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at android.widget.ImageView.<init>(ImageView.java:114)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at android.widget.ImageButton.<init>(ImageButton.java:87)
01-27 15:52:11.264: E/AndroidRuntime(31195):    at android.widget.ImageButton.<init>(ImageButton.java:83)
01-27 15:52:11.264: E/AndroidRuntime(31195):    ... 27 more

Are you familiar with debugging? Null Pointer crashes are fairly easy to find if you just step through your code. Also the LogCat usually tells you the exact line it happens at. Posting the logcat output will help. — Nathan
– Nathan, Commented Jan 27, 2013 at 21:57
@nathan No, unfortunately I'm teaching myself all of this stuff. I'll edit my post to include logcat logs. — Nathan
– Nathan, Commented Jan 27, 2013 at 22:00
I don't think that android:background="@style/AppTheme" is valid. Try taking it out for testing. — A--C
– A--C, Commented Jan 27, 2013 at 22:08
@A--C That did it. If you'd like to post that as an answer then it yours. Thank you! — Nathan
– Nathan, Commented Jan 27, 2013 at 22:14
@derekwolf Posted, and now I'll know better than to leave a comment once the stack trace is added ;) — A--C
– A--C, Commented Jan 27, 2013 at 22:19

A--C · Accepted Answer · 2013-01-27 22:18:08Z

1

Stack trace says it all:

Resource is not a Drawable (color or path):

According to the Android documentation, the background attribute needs either A drawable or a color.

Full quote:

A drawable to use as the background. This can be either a reference to a full drawable resource (such as a PNG image, 9-patch, XML state list description, etc), or a solid color such as "#ff000000" (black).

Style doesn't fit any of those criteria, and so, your app crashes at runtime.

answered Jan 27, 2013 at 22:18

A--C

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Comments

Hakan Serce · Accepted Answer · 2013-01-27 22:12:10Z

1

The problem is related with one of the following:

android:src="@drawable/ic_menu_send"
android:background="@style/AppTheme"

and most probably the second one. These parameters require a drawable type of resource and one of them is not a drawable (as the stack trace suggests).

answered Jan 27, 2013 at 22:12

Hakan Serce

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Nathan · Accepted Answer · 2013-01-27 22:12:21Z

1

Remove "android:background="@style/AppTheme" from the layout xml.

answered Jan 27, 2013 at 22:12

Nathan

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Cristian Holdunu · Accepted Answer · 2013-01-27 22:14:20Z

1

this is what you should look for:

01-27 15:52:11.264: E/AndroidRuntime(31195): Caused by: android.content.res.Resources$NotFoundException: Resource is not a Drawable (color or path): TypedValue{t=0x1/d=0x7f050001 a=-1 r=0x7f050001}

try to remove the @style line and see what happens than, because you said the other resources are in place

answered Jan 27, 2013 at 22:14

Cristian Holdunu

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Bogdan Zurac · Accepted Answer · 2013-01-27 22:11:57Z

0

Caused by: android.content.res.Resources$NotFoundException: Resource is not a Drawable (color or path): TypedValue{t=0x1/d=0x7f050001 a=-1 r=0x7f050001}

Well... dhoo...

answered Jan 27, 2013 at 22:11

Bogdan Zurac

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Comments

bujji8389 · Accepted Answer · 2013-05-10 20:09:23Z

0

Check your images(ic_menu_send) are there in your project under drawable folder.

I have same situation, but my images are corrupted and they are not visible when I check them.

After I copied all my images under drawable forlder, its all working fine.

answered May 10, 2013 at 20:09

bujji8389

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