Clickable image - android

How do i make a image clickable? I have tried some ways, but without success. Here's the last code i tried (it's clickable but gets error):

    ImageView btnNew = (ImageView) findViewById(R.id.newbutton);
    btnNew.setOnClickListener(new View.OnClickListener() {

          @Override
          public void onClick(View v) {

            // do stuff
          }

        });      

and here's the part from xml:

    <ImageView 
    android:src="@drawable/tbnewbutton" 
    android:text="@string/hello"
    android:layout_width="wrap_content"
    an开发者_如何学JAVAdroid:layout_alignParentRight="true"
    android:id="@+id/newbutton"
    android:clickable="true"
    android:onClick="clickImage"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true" />

When running this code, and clicking the image i get this error:

01-24 19:14:09.534: ERROR/AndroidRuntime(1461): java.lang.IllegalStateException: Could not find a method clickImage(View) in the activity

HERE'S THE SOLUTION:

The XML:

    <ImageButton
    android:src="@drawable/tbnewbutton" 
    android:text="@string/hello"
    android:layout_width="wrap_content"
    android:layout_alignParentRight="true"
    android:id="@+id/newbutton"
    android:clickable="true"
    android:onClick="clickNew"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:background="@null" />

The code :

    public void clickNew(View v)
{
    Toast.makeText(this, "Show some text on the screen.", Toast.LENGTH_LONG).show();
}

As other said: make this an ImageButton and define its onClick attribute

<ImageButton
     android:layout_height="wrap_content"
     android:layout_width="wrap_content"
     android:layout_gravity="left"
     android:onClick="scrollToTop"
     android:src="@drawable/to_top_button"
/>

The image is here encoded in a file res/drawable/to_top_button.png. If the user clicks on the button, the method scrollToTop() is called. This method needs to be declared in the class that sets the Layout with the ImageButton as its content layout.

public void scrollToTop(View v) {
    ...
}

Defining the OnClick handler this way saves you a lot of typing and also prevents the need to anonymous inner classes, which is beneficial for the memory footprint.

Does an ImageButton do what you want?

The error message you get implies that you do not have a method in your activity that matches your onClick handler.

You should have something like clickImage(View view) in your activity with the click handling implementation.

You could just use the ImageButton class... http://developer.android.com/reference/android/widget/ImageButton.html

Use a ImageButton ;)

You've set the onclick method to call "clickImage" when the image is clicked in your XML, but you haven't created a clickImage method in your code. You shouldn't need to set the onclick listener at all. Just implement the method from your XML and you should be set.