Add Emacs icon for Android package

* java/AndroidManifest.xml.in: Add new icon.
* java/Makefile.in (srcdir): New variable.
(JAVA_FILES, RESOURCE_FILES): Update variables.
(emacs.apk-in): Apply resources.
* java/README: Describe directory tree.

java/AndroidManifest.xml.in

@@ -62,6 +62,7 @@ along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>. -->
 
   <application android:name="org.gnu.emacs.EmacsApplication"
 	       android:label="Emacs"
+	       android:icon="@drawable/emacs"
 	       android:hardwareAccelerated="true"
 	       android:supportsRtl="true"
 	       android:theme="@android:style/Theme"

java/Makefile.in

@@ -19,6 +19,7 @@
 
 top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
+srcdir = @srcdir@
 version = @version@
 
 # This is the host lib-src and lib, not the cross compiler's lib-src.
@@ -56,7 +57,8 @@ SIGN_EMACS = -keystore emacs.keystore -storepass emacs1 $(JARSIGNER_FLAGS)
 SIGN_EMACS_V2 = sign --v2-signing-enabled --ks emacs.keystore \
 	--debuggable-apk-permitted --ks-pass pass:emacs1
 
-JAVA_FILES = $(shell find . -type f -name *.java)
+JAVA_FILES = $(wildcard $(srcdir)/org/gnu/emacs/*.java)
+RESOURCE_FILES = $(wildcard $(srcdir)/res/drawable/*)
 CLASS_FILES = $(foreach file,$(JAVA_FILES),$(basename $(file)).class)
 
 # Compute the name for the Emacs application package.  This should be:
@@ -112,7 +114,7 @@ $(libsrc)/asset-directory-tool:
 	$(MAKE) -C $(libsrc) $(notdir $@)
 
 emacs.apk-in: $(CROSS_BINS) $(CROSS_LIBS) $(libsrc)/asset-directory-tool \
-  AndroidManifest.xml $(NDK_BUILD_SHARED)
+  AndroidManifest.xml $(NDK_BUILD_SHARED) $(RESOURCE_FILES)
 # Make the working directory for this stuff
 	rm -rf install_temp
 	mkdir -p install_temp/lib/$(ANDROID_ABI)
@@ -158,9 +160,11 @@ ifneq ($(NDK_BUILD_SHARED),)
 endif
 # Package everything.  Specifying the assets on this command line is
 # necessary for AAssetManager_getNextFileName to work on old versions
-# of Android.
-	$(AAPT) package -I "$(ANDROID_JAR)" -F $@ -f \
-	  -M AndroidManifest.xml -A install_temp/assets
+# of Android.  Make sure not to generate R.java, as it's not required
+# by Emacs.
+	$(AAPT) package -I "$(ANDROID_JAR)" -F $@ -f	\
+	  -M AndroidManifest.xml -A install_temp/assets \
+	  -S res -J install_temp
 	pushd install_temp; $(AAPT) add ../$@ `find lib -type f`; popd
 	rm -rf install_temp
 

java/README

@@ -2,6 +2,11 @@ This directory holds the Java sources of the port of GNU Emacs to
 Android-like systems, along with files needed to create an application
 package out of them.
 
+The ``org/gnu/emacs'' subdirectory contains the Java sources under the
+``org.gnu.emacs'' package identifier.
+
+The ``res'' directory contains resources, mainly the Emacs icon.
+
 `emacs.keystore' is the signing key used to build Emacs.  It is kept
 here, and we encourage all people redistributing Emacs to use this
 key.  It holds no security value, and otherwise it will be impossible