android: fix loading documents from doc browser's about dialog

- LibreOfficeUIActivity needs to start a new activity
- LibreOfficeMainActivity is enough to send a new event

Change-Id: I3a7532a07b37a16bdb49f81072132aa57c2c52e8

android/experimental/LOAndroid3/src/java/org/libreoffice/LOAbout.java

@@ -3,6 +3,7 @@ package org.libreoffice;
 import android.app.Activity;
 import android.app.AlertDialog;
 import android.content.DialogInterface;
+import android.content.ComponentName;
 import android.os.Bundle;
 import android.os.Handler;
 import android.support.v4.widget.DrawerLayout;
@@ -16,14 +17,37 @@ import android.widget.AdapterView;
 import android.widget.ListView;
 import android.widget.RelativeLayout;
 import android.widget.TextView;
+import android.content.Intent;
+import android.net.Uri;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.io.File;
 
 public abstract class LOAbout extends Activity {
 
     private static final String DEFAULT_DOC_PATH = "/assets/example.odt";
 
+    private boolean mNewActivity;
+
+    public LOAbout(boolean newActivity) {
+        super();
+        mNewActivity = newActivity;
+    }
+
+    private void loadFromAbout(String input) {
+        if (mNewActivity) {
+            Intent i = new Intent(Intent.ACTION_VIEW, Uri.fromFile(new File(input)));
+            i.setComponent(new ComponentName(
+                        "org.libreoffice",
+                        "org.libreoffice.LibreOfficeMainActivity"));
+            startActivity(i);
+        } else {
+            LOKitShell.sendEvent(LOEventFactory.close());
+            LOKitShell.sendEvent(LOEventFactory.load(input));
+        }
+    }
+
     protected void showAbout() {
         // Inflate the about message contents
         View messageView = getLayoutInflater().inflate(R.layout.about, null, false);
@@ -42,8 +66,7 @@ public abstract class LOAbout extends Activity {
         builder.setNegativeButton(R.string.about_license, new DialogInterface.OnClickListener() {
             @Override
             public void onClick(DialogInterface dialog, int id) {
-                LOKitShell.sendEvent(LOEventFactory.close());
-                LOKitShell.sendEvent(LOEventFactory.load("/assets/license.txt"));
+                loadFromAbout("/assets/license.txt");
                 dialog.dismiss();
             }
         });
@@ -51,8 +74,7 @@ public abstract class LOAbout extends Activity {
         builder.setPositiveButton(R.string.about_notice, new DialogInterface.OnClickListener() {
             @Override
             public void onClick(DialogInterface dialog, int id) {
-                LOKitShell.sendEvent(LOEventFactory.close());
-                LOKitShell.sendEvent(LOEventFactory.load("/assets/notice.txt"));
+                loadFromAbout("/assets/notice.txt");
                 dialog.dismiss();
             }
         });
@@ -60,8 +82,7 @@ public abstract class LOAbout extends Activity {
         builder.setNeutralButton(R.string.about_moreinfo, new DialogInterface.OnClickListener() {
             @Override
             public void onClick(DialogInterface dialog, int id) {
-                LOKitShell.sendEvent(LOEventFactory.close());
-                LOKitShell.sendEvent(LOEventFactory.load(DEFAULT_DOC_PATH));
+                loadFromAbout(DEFAULT_DOC_PATH);
                 dialog.dismiss();
             }
         });

android/experimental/LOAndroid3/src/java/org/libreoffice/LibreOfficeMainActivity.java

@@ -43,6 +43,10 @@ public class LibreOfficeMainActivity extends LOAbout {
     private DocumentPartViewListAdapter mDocumentPartViewListAdapter;
     private String mInputFile;
 
+    public LibreOfficeMainActivity() {
+        super(/*newActivity=*/false);
+    }
+
     public static GeckoLayerClient getLayerClient() {
         return mLayerClient;
     }

android/experimental/LOAndroid3/src/java/org/libreoffice/ui/LibreOfficeUIActivity.java

@@ -125,6 +125,10 @@ public class LibreOfficeUIActivity extends LOAbout implements ActionBar.OnNaviga
     int currentPage;
     XRenderable renderable;
 
+    public LibreOfficeUIActivity() {
+        super(/*newActivity=*/true);
+    }
+
     @Override
     public void onCreate(Bundle savedInstanceState) {