Fix potential NPE in manifest editor when switching SDKs

The UiElementNode depends on the target to compute the
description and it's entirely possible for the target to
be null while the SDK is being unloaded/reloaded.

SDK BUG 2196260

Change-Id: I4151529ea3b6a65eade47d03e55fc93cad8596d9

1 files changed, 13 insertions, 7 deletions

diff --git a/tools/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/manifest/model/UiManifestElementNode.java b/tools/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/manifest/model/UiManifestElementNode.java
index 62b6d9d1d..5dc85447b 100644
--- a/tools/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/manifest/model/UiManifestElementNode.java
+++ b/tools/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/manifest/model/UiManifestElementNode.java
@@ -21,6 +21,7 @@ import com.android.ide.eclipse.adt.internal.editors.manifest.descriptors.Android
 import com.android.ide.eclipse.adt.internal.editors.manifest.descriptors.ManifestElementDescriptor;
 import com.android.ide.eclipse.adt.internal.editors.uimodel.UiAttributeNode;
 import com.android.ide.eclipse.adt.internal.editors.uimodel.UiElementNode;
+import com.android.ide.eclipse.adt.internal.sdk.AndroidTargetData;
 import com.android.sdklib.SdkConstants;
 
 import org.w3c.dom.Element;
@@ -41,10 +42,10 @@ import org.w3c.dom.Element;
  * {@link ElementDescriptor}.
  */
 public final class UiManifestElementNode extends UiElementNode {
-    
+
     /**
      * Creates a new {@link UiElementNode} described by a given {@link ElementDescriptor}.
-     * 
+     *
      * @param elementDescriptor The {@link ElementDescriptor} for the XML node. Cannot be null.
      */
     public UiManifestElementNode(ManifestElementDescriptor elementDescriptor) {
@@ -55,18 +56,23 @@ public final class UiManifestElementNode extends UiElementNode {
      * Computes a short string describing the UI node suitable for tree views.
      * Uses the element's attribute "android:name" if present, or the "android:label" one
      * followed by the element's name.
-     * 
+     *
      * @return A short string describing the UI node suitable for tree views.
      */
     @Override
     public String getShortDescription() {
-        if (getXmlNode() != null &&
+        AndroidTargetData target = getAndroidTarget();
+        AndroidManifestDescriptors manifestDescriptors = null;
+        if (target != null) {
+            manifestDescriptors = target.getManifestDescriptors();
+        }
+
+        if (manifestDescriptors != null &&
+                getXmlNode() != null &&
                 getXmlNode() instanceof Element &&
                 getXmlNode().hasAttributes()) {
 
-            AndroidManifestDescriptors manifestDescriptors =
-                    getAndroidTarget().getManifestDescriptors();
-            
+
             // Application and Manifest nodes have a special treatment: they are unique nodes
             // so we don't bother trying to differentiate their strings and we fall back to
             // just using the UI name below.