空区域-Android XML布局和Mac OS X 10.7

Question

I've been using the ADT release from developers.android.com that comes with SDK and Eclipse in one package. I have some code that gives me a Empty Region exception upon drawing the XML file in the graphical layout tab.

Exception raised during rendering: Empty region! Exception details are logged in Window > Show View > Error Log

java.lang.IllegalArgumentException: Empty region! at javax.imageio.ImageReader.computeRegions(ImageReader.java:2689) at com.sun.imageio.plugins.wbmp.WBMPImageReader.read(WBMPImageReader.java:184) at javax.imageio.ImageIO.read(ImageIO.java:1422) at javax.imageio.ImageIO.read(ImageIO.java:1282) at android.graphics.Bitmap_Delegate.createBitmap(Bitmap_Delegate.java:96) at com.android.layoutlib.bridge.impl.ResourceHelper.getDrawable(ResourceHelper.java:233) at com.android.layoutlib.bridge.bars.CustomBar.loadIcon(CustomBar.java:196) at com.android.layoutlib.bridge.bars.CustomBar.loadIconById(CustomBar.java:188) at com.android.layoutlib.bridge.bars.CustomBar.loadIconById(CustomBar.java:155) at com.android.layoutlib.bridge.bars.FakeActionBar.(FakeActionBar.java:38)

This came on suddenly and shows a null pointer exception on Windows version of eclipse with the SDK.

I've checked for all images, as someone somewhere said something about corrupted images. Programs can view them just fine. I've fixed the project settings and reloaded eclipse, failed to resolve.

  <com.demortes.controller.DualJoystickView android:id="@+id/dualjoystickView" android:layout_gravity="center_horizontal" android:layout_width="fill_parent" android:layout_height="175dp" android:layout_marginLeft="10dp" android:layout_marginRight="10dp"/> 

  <Button android:id="@+id/button_A" android:layout_width="90dp" android:text="@string/a_button" android:textSize="24sp" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:layout_marginRight="10dp" /> <Button android:id="@+id/button_B" android:text="@string/b_button" android:textSize="24sp" android:layout_width="90dp" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" /> </LinearLayout> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" > <Button android:id="@+id/button_Y" android:text="@string/y_button" android:textSize="24sp" android:layout_width="90dp" android:layout_height="wrap_content" android:layout_marginRight="10dp" /> <Button android:id="@+id/button_X" android:text="@string/x_button" android:textSize="24sp" android:layout_width="90dp" android:layout_height="wrap_content" /> </LinearLayout> 

There's my XML file.

Now here's where it gets weird. When I switch the API from 17 to 8 in the graphical layout tab, it draws it... but incorrectly. It's completely strange to me.

Any insight you can think of is greatly appreciated! TIA.

Answer 1

check Manifest.xml like this

 <application
    android:label="@string/app_name"
    android:icon="@drawable/logo"/>

make sure "drawable_hdpi" "drawable_ldpi" "drawable_mdpi" have file logo.png and the image resolution is correct.