Android code refactorig and hacking

Sorry for the large unstructured commit. But hey, the Android code is
experimental so far.

Extract the native lo-bootstrap code into a fairly normal library
built in sal. (Previously it was the JNI part of the "Bootstrap" app.)
Just linkink normally to liblo-bootstrap from C++ code that uses it
works fine, no need to do a dlsym lookup.

Bootstrap is still a subclass of NativeActivity and can thus still be
used as an "app" (to start unit tests, or whatever), but can also be
used from some other app's Java code to just get access to the
lo-bootstrap native methods.

Introduce a new top-level "module", android, for Bootstrap and the
experiments with DocumentLoader.

Note that the experimental DocumentLoader app still crashes. It can't
create the com.sun.star.frame.Desktop instance.

I spent lots of time debugging in the painfully inadequate
ndk-gdb. (Even the newer gdb build from the "mingw-and-ndk" project is
quite crappy in many ways.) I should really experiment with
corresponding code on a normal platform first before even trying on
Android. Basically, I think that if I just can get the concept of Java
code that instantiates and uses LO components *in-process* working on
a normal desktop platform, it should work on Android, too.

26 files changed, 292 insertions, 39 deletions

diff --git a/sal/osl/android/.gitignore b/android/Bootstrap/.gitignore
index 9034b9895557..9034b9895557 100644
--- a/sal/osl/android/.gitignore
+++ b/android/Bootstrap/.gitignore
diff --git a/sal/osl/android/AndroidManifest.xml b/android/Bootstrap/AndroidManifest.xml
index 159bbf105d75..159bbf105d75 100644
--- a/sal/osl/android/AndroidManifest.xml
+++ b/android/Bootstrap/AndroidManifest.xml
diff --git a/sal/osl/android/Makefile b/android/Bootstrap/Makefile
index b0368e7d3627..d8a7004579c7 100644
--- a/sal/osl/android/Makefile
+++ b/android/Bootstrap/Makefile
@@ -17,13 +17,9 @@ endef
 
 # The default target just builds.
 
-# lo-bootstrap.jar is used from other LO apps than the test ones we
-# include in the .apk here.
-
 all: build-ant lo-bootstrap.jar
 
-build-ndk:
-	ndk-build V=1
+copy-stuff:
 #
 # Copy shared libraries we need to libs/armeabi-v7a so that ant will
 # include them in the .apk.
@@ -31,16 +27,21 @@ build-ndk:
 # Copy them to obj/local/armeabi-v7a, too, where gdb will look for
 # them.
 #
-# First the cppunittester "program" from here, which as all "program"
+	mkdir -p $(SODEST) $(OBJLOCAL)
+#
+# First the most important one, liblo-bootstrap.so
+	$(call COPY,$(OUTDIR)/lib/liblo-bootstrap.so)
+#
+# Then the cppunittester "program". As all "program"
 # files we build for Android actually is a shared object.
-	$(call COPY,../../$(INPATH)/bin/cppunittester,libcppunittester.so)
+	$(call COPY,$(OUTDIR)/bin/cppunit/cppunittester,libcppunittester.so)
 #
 # The cppunit library
 	$(call COPY,$(OUTDIR)/lib/libcppunit-1.12.so)
 #
 # cppunit "plug-ins", first ones from sal
 #
-	$(call COPY,../../$(INPATH)/lib/*.so)
+	$(call COPY,../../sal/$(INPATH)/lib/*.so)
 #
 # and ones from other modules. Note that depending on when you try
 # this, these might not have been built yet.
@@ -101,26 +102,28 @@ build-ndk:
 		sed -e 's!uri="./!uri="$(APP_DATA_PATH)/lib/!g' <$(SRC_ROOT)/testtools/$(INPATH)/lib/$${F}.rdb >assets/lib/$${F}.rdb; \
 	done
 
-build-ant: build-ndk
+build-ant: copy-stuff
 	unset JAVA_HOME && ant debug
 
-install: build-ndk
+lo-bootstrap.jar: build-ant
+	cd bin/classes && jar cvf ../../lo-bootstrap.jar fi/iki/tml org/libreoffice/android/Bootstrap.class
+
+install: copy-stuff lo-bootstrap.jar
+	cp lo-bootstrap.jar $(OUTDIR)bin
 	unset JAVA_HOME && ant debug install
 	@echo
 	@echo 'Run it with something like what "make run" does (see Makefile)'
 	@echo
 
-lo-bootstrap.jar: build-ant
-	cd bin/classes && jar cvf ../../lo-bootstrap.jar fi/iki/tml org/libreoffice/android/Bootstrap.class
-
-run: install
+run:
 # Note: these are just examples. 
 #
 	adb shell am start -n org.libreoffice.android/.Bootstrap -e lo-main-library libcppunittester -e lo-main-cmdline "$(APP_DATA_PATH)/lib/libqa_sal_types.so"
 #
+	sleep 10
 	adb shell am start -n org.libreoffice.android/.Bootstrap -e lo-main-library libcppunittester -e lo-main-cmdline "$(APP_DATA_PATH)/lib/libtest_i18npool_test_breakiterator.so --protector libunoexceptionprotector.so unoexceptionprotector '-env:UNO_TYPES=file:///assets/bin/udkapi.rdb file:///assets/bin/types.rdb'  '-env:UNO_SERVICES=file:///assets/xml/ure/services.rdb  file:///assets/ComponentTarget/i18npool/util/i18npool.component' -env:LO_LIB_DIR=file://$(APP_DATA_PATH)/lib" 
 #
-	adb shell am start -n org.libreoffice.android/.Bootstrap -e lo-main-library libunoexe -e lo-main-cmdline "-ro /assets/lib/uno_services.rdb -ro /assets/lib/uno_types.rdb -s com.sun.star.test.bridge.BridgeTest -- com.sun.star.test.bridge.CppTestObject" -e lo-main-delay 2
+#	adb shell am start -n org.libreoffice.android/.Bootstrap -e lo-main-library libunoexe -e lo-main-cmdline "-ro /assets/lib/uno_services.rdb -ro /assets/lib/uno_types.rdb -s com.sun.star.test.bridge.BridgeTest -- com.sun.star.test.bridge.CppTestObject" -e lo-main-delay 2
 
 clean:
 	rm -rf bin assets
diff --git a/sal/osl/android/ant.properties b/android/Bootstrap/ant.properties
index ee52d86d94a4..ee52d86d94a4 100644
--- a/sal/osl/android/ant.properties
+++ b/android/Bootstrap/ant.properties
diff --git a/sal/osl/android/build.xml b/android/Bootstrap/build.xml
index 6b091c49c2bd..6b091c49c2bd 100644
--- a/sal/osl/android/build.xml
+++ b/android/Bootstrap/build.xml
diff --git a/sal/osl/android/project.properties b/android/Bootstrap/project.properties
index 730e911f2f9e..730e911f2f9e 100644
--- a/sal/osl/android/project.properties
+++ b/android/Bootstrap/project.properties
diff --git a/sal/osl/android/res/layout/main.xml b/android/Bootstrap/res/layout/main.xml
index 5839d8cda704..5839d8cda704 100644
--- a/sal/osl/android/res/layout/main.xml
+++ b/android/Bootstrap/res/layout/main.xml
diff --git a/sal/osl/android/res/values/strings.xml b/android/Bootstrap/res/values/strings.xml
index f296dd4b137d..f296dd4b137d 100644
--- a/sal/osl/android/res/values/strings.xml
+++ b/android/Bootstrap/res/values/strings.xml
diff --git a/sal/osl/android/src/fi/iki/tml/CommandLine.java b/android/Bootstrap/src/fi/iki/tml/CommandLine.java
index fb5adec2acf5..fb5adec2acf5 100644
--- a/sal/osl/android/src/fi/iki/tml/CommandLine.java
+++ b/android/Bootstrap/src/fi/iki/tml/CommandLine.java
diff --git a/sal/osl/android/src/org/libreoffice/android/Bootstrap.java b/android/Bootstrap/src/org/libreoffice/android/Bootstrap.java
index 5e377b27b02e..46ce235d3ad4 100644
--- a/sal/osl/android/src/org/libreoffice/android/Bootstrap.java
+++ b/android/Bootstrap/src/org/libreoffice/android/Bootstrap.java
@@ -72,6 +72,9 @@ public class Bootstrap extends NativeActivity
     // Wrapper for system()
     public static native void system(String cmdline);
 
+    // Wrapper for putenv()
+    public static native void putenv(String string);
+
     public static void setup(Activity activity)
     {
         String dataDir = null;
diff --git a/android/examples/DocumentLoader/AndroidManifest.xml b/android/experiments/DocumentLoader/AndroidManifest.xml
index c137311155d1..c137311155d1 100644
--- a/android/examples/DocumentLoader/AndroidManifest.xml
+++ b/android/experiments/DocumentLoader/AndroidManifest.xml
diff --git a/android/experiments/DocumentLoader/Makefile b/android/experiments/DocumentLoader/Makefile
new file mode 100644
index 000000000000..7db82ae1a43a
--- /dev/null
+++ b/android/experiments/DocumentLoader/Makefile
@@ -0,0 +1,120 @@
+NDK_HOME:=$(shell type -p ndk-build)
+NDK_HOME:=$(shell dirname $(NDK_HOME))
+
+SODEST=libs/armeabi-v7a
+OBJLOCAL=obj/local/armeabi-v7a
+
+define COPYSO
+cp $(1) $(SODEST)$(if $(2),/$(2)) && \
+arm-linux-androideabi-strip --strip-debug $(SODEST)$(if $(2),/$(2),/$(notdir $(1))) && \
+cp $(1) $(OBJLOCAL)$(if $(2),/$(2))
+endef
+
+define COPYJAR
+cp $(1) libs
+endef
+
+# The default target just builds.
+
+all: build-ant
+
+copy-stuff:
+# First always clean 
+	rm -rf libs $(OBJLOCAL)
+	mkdir -p $(SODEST) $(OBJLOCAL)
+#
+# Copy jar files we need, and even construct one.
+#
+	for F in $(strip \
+		   java_uno \
+		   juh \
+		   jurt \
+		   ridl \
+		   unoloader \
+		  ); do \
+	    $(call COPYJAR,$(OUTDIR)/bin/$${F}.jar); \
+	done
+#
+# lo-bootstrap.jar from ../../Bootstrap
+#
+	cp ../../Bootstrap/lo-bootstrap.jar libs
+#
+# com.sun.star.frame.XComponentLoader is not in any jar
+#
+	cd libs && \
+	    LD_LIBRARY_PATH=$(OUTDIR_FOR_BUILD)/lib \
+	    DYLD_LIBRARY_PATH=$(OUTDIR_FOR_BUILD)/lib \
+	    $(OUTDIR_FOR_BUILD)/bin/javamaker -BUCR -nD \
+		$(OUTDIR)/bin/udkapi.rdb $(OUTDIR)/bin/offapi.rdb \
+		-Tcom.sun.star.frame.XComponentLoader && \
+	    jar cvf more.jar com
+#
+# Copy shared libraries (including UNO components) we need to
+# libs/armeabi-v7a so that ant will include them in the .apk.
+#
+# Copy them to obj/local/armeabi-v7a, too, where gdb will look for
+# them.
+#
+	for F in $(strip \
+		   comphelpgcc3 \
+		   gcc3_uno \
+		   i18nisolang1gcc3 \
+		   i18nutilgcc3 \
+		   icudatalo \
+		   icui18nlo \
+		   icuuclo \
+		   java_uno \
+		   juh \
+		   juhx \
+		   jvmaccessgcc3 \
+		   lo-bootstrap \
+		   localedata_en \
+		   localedata_others \
+		   reg \
+		   sal_textenc \
+		   store \
+		   ucbhelper4gcc3 \
+		   uno_cppu \
+		   uno_sal \
+		   uno_salhelpergcc3 \
+		   uno_cppuhelpergcc3 \
+		   xml2 \
+		   xmlreader \
+		   bootstrap.uno \
+		   i18npool.uno \
+		  ); do \
+	    $(call COPYSO,$(OUTDIR)/lib/lib$${F}.so); \
+	done
+#
+# Then the shared GNU C++ library
+	$(call COPYSO,$(NDK_HOME)/sources/cxx-stl/gnu-libstdc++/libs/armeabi-v7a/libgnustl_shared.so)
+#
+# Then other "assets". Let the directory structure under assets mimic
+# that under solver for now.
+	mkdir -p assets/bin assets/lib assets/xml/ure assets/ComponentTarget/i18npool/util
+	cp $(OUTDIR)/bin/udkapi.rdb assets/bin
+	cp $(OUTDIR)/bin/types.rdb assets/bin
+	cp $(OUTDIR)/bin/uno.ini assets
+	cp $(OUTDIR)/xml/ure/services.rdb assets/xml/ure
+	cp $(SRC_ROOT)/odk/examples/java/DocumentHandling/test/test1.odt assets
+	cp $(WORKDIR)/ComponentTarget/i18npool/util/i18npool.component assets/ComponentTarget/i18npool/util
+#
+# Then gdbserver and gdb.setup so that we can debug with ndk-gdb.
+#
+	cp $(NDK_HOME)/toolchains/arm-linux-androideabi-4.4.3/prebuilt/gdbserver $(SODEST)
+	echo set solib-search-path ./obj/local/armeabi-v7a >$(SODEST)/gdb.setup
+
+build-ant: copy-stuff
+	unset JAVA_HOME && ant debug
+
+install: copy-stuff
+	unset JAVA_HOME && ant debug install
+	@echo
+	@echo 'Run it with something like what "make run" does (see Makefile)'
+	@echo
+
+run: install
+	adb shell am start -n org.libreoffice.android.examples/.DocumentLoader -e input /assets/test1.odt
+
+clean:
+	rm -rf bin assets
diff --git a/android/examples/DocumentLoader/src/org/libreoffice/android/examples/DocumentLoader.java b/android/experiments/DocumentLoader/src/org/libreoffice/android/examples/DocumentLoader.java
index 41f69dd019b0..819cf82ccaba 100644
--- a/android/examples/DocumentLoader/src/org/libreoffice/android/examples/DocumentLoader.java
+++ b/android/experiments/DocumentLoader/src/org/libreoffice/android/examples/DocumentLoader.java
@@ -30,13 +30,7 @@ package org.libreoffice.android.examples;
 
 import android.app.Activity;
 import android.os.Bundle;
-import android.view.KeyEvent;
-import android.view.Menu;
-import android.view.MenuItem;
-import android.view.View;
-import android.view.View.OnClickListener;
-import android.widget.Button;
-import android.widget.EditText;
+import android.util.Log;
 
 import com.sun.star.uno.UnoRuntime;
 
@@ -45,6 +39,8 @@ import org.libreoffice.android.Bootstrap;
 public class DocumentLoader
     extends Activity {
 
+    private static String TAG = "DocumentLoader";
+
     @Override
     public void onCreate(Bundle savedInstanceState)
     {
@@ -52,29 +48,49 @@ public class DocumentLoader
 
         try {
 
-            Thread.sleep(20000);
-
             Bootstrap.setup(this);
 
             Bootstrap.dlopen("libjuh.so");
 
+            // Load more shlibs here explicitly in advance because
+            // that makes debugging work better, sigh
+            Bootstrap.dlopen("libuno_cppu.so");
+            Bootstrap.dlopen("libuno_salhelpergcc3.so");
+            Bootstrap.dlopen("libuno_cppuhelpergcc3.so");
+            Bootstrap.dlopen("libbootstrap.uno.so");
+            Bootstrap.dlopen("libgcc3_uno.so");
+            Bootstrap.dlopen("libjava_uno.so");
+            
+            Bootstrap.putenv("UNO_TYPES=file:///assets/bin/udkapi.rdb file:///assets/bin/types.rdb");
+            Bootstrap.putenv("UNO_SERVICES=file:///assets/xml/ure/services.rdb");
+            // Bootstrap.putenv("INIFILENAME=vnd.sun.star.pathname:/assets/uno.ini");
+
             com.sun.star.uno.XComponentContext xContext = null;
 
             xContext = com.sun.star.comp.helper.Bootstrap.defaultBootstrap_InitialComponentContext();
 
+            Log.i(TAG, "xContext is" + (xContext!=null ? " not" : "") + " null");
+
             com.sun.star.lang.XMultiComponentFactory xMCF =
                 xContext.getServiceManager();
 
             Object oDesktop = xMCF.createInstanceWithContext(
                 "com.sun.star.frame.Desktop", xContext);
 
+            Log.i(TAG, "oDesktop is" + (oDesktop!=null ? " not" : "") + " null");
+
             com.sun.star.frame.XComponentLoader xCompLoader =
                 (com.sun.star.frame.XComponentLoader)
                      UnoRuntime.queryInterface(
                          com.sun.star.frame.XComponentLoader.class, oDesktop);
 
-            // Getting the given starting directory
-            String sUrl = "file:///assets/inputfile.doc";
+            Log.i(TAG, "xCompLoader is" + (xCompLoader!=null ? " not" : "") + " null");
+
+            String input = getIntent().getStringExtra("input");
+            if (input == null)
+                input = "/assets/test1.odt";
+
+            String sUrl = "file://" + input;
 
             // Loading the wanted document
             com.sun.star.beans.PropertyValue propertyValues[] =
diff --git a/jvmfwk/plugins/sunmajor/pluginlib/makefile.mk b/jvmfwk/plugins/sunmajor/pluginlib/makefile.mk
index 78f1457e49d0..03c4f58e37d8 100644
--- a/jvmfwk/plugins/sunmajor/pluginlib/makefile.mk
+++ b/jvmfwk/plugins/sunmajor/pluginlib/makefile.mk
@@ -69,6 +69,9 @@ SHL1STDLIBS= \
         $(SALHELPERLIB) \
         $(SALLIB)
         
+.IF "$(OS)" == "ANDROID"
+SHL1STDLIBS+=-llo-bootstrap
+.ENDIF
 
 .IF "$(GUI)" == "WNT"
 .IF "$(COM)"!="GCC"
diff --git a/jvmfwk/plugins/sunmajor/pluginlib/sunjavaplugin.cxx b/jvmfwk/plugins/sunmajor/pluginlib/sunjavaplugin.cxx
index 7a54b4452865..0af05d923087 100644
--- a/jvmfwk/plugins/sunmajor/pluginlib/sunjavaplugin.cxx
+++ b/jvmfwk/plugins/sunmajor/pluginlib/sunjavaplugin.cxx
@@ -64,6 +64,10 @@
 #include "vendorlist.hxx"
 #include "diagnostics.h"
 
+#ifdef ANDROID
+#include <lo-bootstrap.h>
+#endif
+
 #if defined HAVE_VALGRIND_H
 #include <valgrind.h>
 #else
@@ -758,10 +762,8 @@ javaPluginError jfw_plugin_startJavaVirtualMachine(
     (void) cOptions;
     // On Android we always have a Java VM as we only expect this code
     // to be run in an Android app anyway.
-    struct JNIInvokeInterface* * (*lo_get_javavm)(void) = (struct JNIInvokeInterface* * (*)(void)) dlsym(RTLD_DEFAULT, "lo_get_javavm");
-    fprintf(stderr, "Got lo_get_javavm = %p", lo_get_javavm);
-    *ppVm = (JavaVM *) (*lo_get_javavm)();
-    fprintf(stderr, "lo_get_javavm returns %p", (*lo_get_javavm)());
+    *ppVm = lo_get_javavm();
+    fprintf(stderr, "lo_get_javavm returns %p", *ppVm);
 #endif
 
    return errcode;
diff --git a/sal/osl/android/jni/android_native_app_glue.c b/sal/android/android_native_app_glue.c
index 8ff9f69d9946..8ff9f69d9946 100644
--- a/sal/osl/android/jni/android_native_app_glue.c
+++ b/sal/android/android_native_app_glue.c
diff --git a/sal/osl/android/jni/android_native_app_glue.h b/sal/android/android_native_app_glue.h
index 1b8c1f10725d..1b8c1f10725d 100644
--- a/sal/osl/android/jni/android_native_app_glue.h
+++ b/sal/android/android_native_app_glue.h
diff --git a/sal/osl/android/jni/lo-bootstrap.c b/sal/android/lo-bootstrap.c
index d9c1e32958ab..6ac285d498d1 100644
--- a/sal/osl/android/jni/lo-bootstrap.c
+++ b/sal/android/lo-bootstrap.c
@@ -434,6 +434,22 @@ Java_org_libreoffice_android_Bootstrap_system(JNIEnv* env,
     (*env)->ReleaseStringUTFChars(env, cmdline, s);
 }
 
+// public static native void putenv(String string);
+
+void
+Java_org_libreoffice_android_Bootstrap_putenv(JNIEnv* env,
+                                              jobject clazz,
+                                              jstring string)
+{
+    const jbyte *s = (*env)->GetStringUTFChars(env, string, NULL);
+
+    LOGI("putenv(%s)", s);
+
+    putenv(s);
+
+    (*env)->ReleaseStringUTFChars(env, string, s);
+}
+
 char **
 lo_dlneeds(const char *library)
 {
diff --git a/sal/android/makefile.mk b/sal/android/makefile.mk
new file mode 100644
index 000000000000..74de4ee1997a
--- /dev/null
+++ b/sal/android/makefile.mk
@@ -0,0 +1,59 @@
+# Version: MPL 1.1 / GPLv3+ / LGPLv3+
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License or as specified alternatively below. You may obtain a copy of
+# the License at http:#www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# Major Contributor(s):
+# Copyright (C) 2011 Tor Lillqvist <tml@iki.fi> (initial developer)
+# Copyright (C) 2011 SUSE Linux http://suse.com (initial developer's employer)
+#
+# Zip parsing code lifted from Mozilla's other-licenses/android/APKOpen.cpp,
+# by Michael Wu <mwu@mozilla.com>.
+#
+# All Rights Reserved.
+#
+# For minor contributions see the git repository.
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 3 or later (the "GPLv3+"), or
+# the GNU Lesser General Public License Version 3 or later (the "LGPLv3+"),
+# in which case the provisions of the GPLv3+ or the LGPLv3+ are applicable
+# instead of those above.
+
+PRJ = ..
+PRJNAME = sal
+TARGET = lo-bootstrap
+
+# Too many warnings from android_native_app_glue.[ch]
+EXTERNAL_WARNINGS_NOT_ERRORS = TRUE
+
+.INCLUDE :  settings.mk
+
+.IF "$(OS)" != "ANDROID"
+ALL:
+	@: do nothing
+.ENDIF
+
+SHL1TARGET = $(TARGET)
+
+SHL1OBJS = \
+    $(SLO)$/lo-bootstrap.obj
+
+# We don't want to link liblo-bootstrap.so against
+# libgnustl_shared.so. The Android dynamic linker won't find it
+# anyway. One very point of liblo-bootstrap is its wrapper for
+# dlopen() that searches also in the app's lib folder for needed
+# shared libraries. So just re-define STDSHLCUIMT.
+
+STDSHLCUIMT := -llog -landroid
+
+# Also don't pointless
+
+.INCLUDE :  target.mk
diff --git a/sal/osl/unx/file.cxx b/sal/osl/unx/file.cxx
index ccc87e3ed7b7..1bf76a81f08e 100644
--- a/sal/osl/unx/file.cxx
+++ b/sal/osl/unx/file.cxx
@@ -56,6 +56,10 @@
 
 #endif /* MACOSX */
 
+#ifdef ANDROID
+#include <lo-bootstrap.h>
+#endif
+
 #ifdef DEBUG_OSL_FILE
 #   define OSL_FILE_TRACE osl_trace
 #   define PERROR( a, b ) perror( a ); fprintf( stderr, b )
@@ -917,8 +921,7 @@ SAL_CALL osl_openFile( rtl_uString* ustrFileURL, oslFileHandle* pHandle, sal_uIn
     {
         void *address;
         size_t size;
-        void *(*lo_apkentry)(const char *, size_t *) = (void *(*)(const char *, size_t *)) dlsym(RTLD_DEFAULT, "lo_apkentry");
-        address = (*lo_apkentry)(buffer, &size);
+        address = lo_apkentry(buffer, &size);
         return osl_openMemoryAsFile(address, size, pHandle);
     }
 #endif
diff --git a/sal/osl/unx/module.c b/sal/osl/unx/module.c
index 952449db8ed2..38a49b7e4744 100644
--- a/sal/osl/unx/module.c
+++ b/sal/osl/unx/module.c
@@ -43,6 +43,10 @@
 #include <sys/ldr.h>
 #endif
 
+#ifdef ANDROID
+#include <lo-bootstrap.h>
+#endif
+
 /* implemented in file.c */
 extern int UnicodeToText(char *, size_t, const sal_Unicode *, sal_Int32);
 
@@ -96,8 +100,7 @@ static sal_Bool getModulePathFromAddress(void * address, rtl_String ** path) {
     Dl_info dl_info;
 
 #ifdef ANDROID
-    int (*lo_dladdr)(void *, Dl_info *) = dlsym(RTLD_DEFAULT, "lo_dladdr");
-    result = (*lo_dladdr)(address, &dl_info);
+    result = lo_dladdr(address, &dl_info);
 #else
     result = dladdr(address, &dl_info);
 #endif
diff --git a/sal/osl/unx/process_impl.cxx b/sal/osl/unx/process_impl.cxx
index 1edbf898f891..83c5c8872dbe 100644
--- a/sal/osl/unx/process_impl.cxx
+++ b/sal/osl/unx/process_impl.cxx
@@ -59,6 +59,10 @@
 
 #include "uunxapi.h"
 
+#ifdef ANDROID
+#include <lo-bootstrap.h>
+#endif
+
 /***************************************
   osl_bootstrap_getExecutableFile_Impl().
 
@@ -129,11 +133,25 @@ oslProcessError SAL_CALL osl_bootstrap_getExecutableFile_Impl (
     oslProcessError result = osl_Process_E_NotFound;
 
 #ifdef ANDROID
-    /* On Android we want the address of the "lo_main()" function, as
-     * that is what corresponds to "main()" in LibreOffice programs on
-     * normal desktop OSes.
+    /* On Android we in theory want the address of the "lo_main()"
+     * function, as that is what corresponds to "main()" in
+     * LibreOffice programs on normal desktop OSes.
+     *
+     * But that is true only for apps with a "native activity", using
+     * <sal/main.h> and the org.libreoffice.android.Bootstrap
+     * mechanism. For more normal (?) Android apps that just use
+     * LibreOffice libraries (components) where the main program is in
+     * Java, that just use LibreOffice libraries, there is no
+     * lo_main(). (Note that we don't know for sure yet how
+     * complicated it might be to write such Android apps...)
+     *
+     * Maybe best to just pick some function in liblo-bootstrap.so
+     * which also such Java apps *must* load as the very first
+     * LibreOffice native library. We store all LibreOffice native
+     * shared libraries an app uses in the same folder anyway, so it
+     * doesn't really matter.
      */
-    void * addr = dlsym (RTLD_DEFAULT, "lo_main");
+    void * addr = (void *) &lo_dlopen;
 #else
     /* Determine address of "main()" function. */
     void * addr = dlsym (RTLD_DEFAULT, "main");
diff --git a/sal/prj/build.lst b/sal/prj/build.lst
index 47b8f58ecac9..f7f16ad12796 100644
--- a/sal/prj/build.lst
+++ b/sal/prj/build.lst
@@ -3,13 +3,14 @@ sa	sal										usr1	-	all	sa_mkout NULL
 sa	sal\inc									nmake	-	all	sa_inc NULL
 sa	sal\typesconfig							nmake	-	all	sa_tc sa_inc NULL
 sa	sal\cpprt								nmake	-	u	sa_cpprt sa_util sa_inc NULL
+sa	sal\android								nmake	-	u	sa_android NULL
 sa	sal\rtl\source							nmake	-	all	sa_rtl sa_tc.u sa_inc NULL
 sa	sal\textenc								nmake	-	all	sa_textenc sa_tc.u sa_inc NULL
 sa	sal\systools\win32\uwinapi				nmake	-	n	sa_uwinapi sa_inc NULL
 sa	sal\systools\win32\onlineupdate			nmake	-	n	sa_onlineupdate sa_uwinapi.n sa_inc NULL
 sa	sal\osl\w32								nmake	-	n	sa_osln sa_inc NULL
 sa  sal\qa                                  nmake   -   all sa_qa sa_util NULL
-sa	sal\osl\unx								nmake	-	u	sa_oslu sa_tc.u sa_inc NULL
+sa	sal\osl\unx								nmake	-	u	sa_oslu sa_android.u sa_tc.u sa_inc NULL
 sa	sal\osl\all								nmake	-	all	sa_oslall sa_tc.u sa_inc NULL
 sa	sal\util								nmake	-	all	sa_util sa_tc.u sa_oslall sa_uwinapi.n sa_onlineupdate.n sa_osln.n sa_oslu.u sa_rtl sa_textenc NULL
 sa sal\util\sal_textenc nmake - all sa_util_saltextenc sa_util NULL
diff --git a/sal/prj/d.lst b/sal/prj/d.lst
index c7f93ed06309..1d73422d2fae 100644
--- a/sal/prj/d.lst
+++ b/sal/prj/d.lst
@@ -31,6 +31,8 @@ symlink: %_DEST%\lib\libuno_sal.dylib.3 %_DEST%\lib\libuno_sal.dylib
 ..\%__SRC%\lib\*.sl %_DEST%\lib\*.sl
 ..\%__SRC%\lib\*.a %_DEST%\lib\*.a
 
+..\%__SRC%\lib\liblo-bootstrap.so %_DEST%\lib\liblo-bootstrap.so
+
 ..\%__SRC%\slb\sal.lib %_DEST%\lib\xsal.lib
 
 ..\%__SRC%\bin\*.dll %_DEST%\bin\*.dll
diff --git a/sal/util/makefile.mk b/sal/util/makefile.mk
index 981f3cbbe632..d81780a9bf79 100644
--- a/sal/util/makefile.mk
+++ b/sal/util/makefile.mk
@@ -113,6 +113,10 @@ SHL1STDLIBS+= -z allextract -staticlib=Crun -z defaultextract
 SHL1STDLIBS+=-framework CoreFoundation -framework Carbon
 .ENDIF
 
+.IF "$(OS)" == "ANDROID"
+SHL1STDLIBS+=-llo-bootstrap
+.ENDIF
+
 SHL1LIBS+=$(SLB)$/$(TARGET).lib
 
 .IF "$(linkinc)" != ""
diff --git a/sal/osl/android/jni/lo-bootstrap.h b/solenv/inc/unxandr/lo-bootstrap.h
index 258d9d28850c..258d9d28850c 100644
--- a/sal/osl/android/jni/lo-bootstrap.h
+++ b/solenv/inc/unxandr/lo-bootstrap.h