Android: Make it possible to open documents from Android

Include ad-hoc code to open files on Android.

mobile/android/AndroidManifest.xml

@@ -1,43 +1,16 @@
 <?xml version='1.0' encoding='utf-8'?>
 <manifest package="org.kde.okularkirigami" xmlns:android="http://schemas.android.com/apk/res/android" android:versionName="1.3.0" android:versionCode="9" android:installLocation="auto">
     <application android:name="org.qtproject.qt5.android.bindings.QtApplication" android:label="Okular" android:icon="@drawable/icon">
-        <activity android:configChanges="orientation|uiMode|screenLayout|screenSize|smallestScreenSize|locale|fontScale|keyboard|keyboardHidden|navigation"
-                  android:name="org.qtproject.qt5.android.bindings.QtActivity"
-                  android:label="Okular"
-                  android:hardwareAccelerated="true"
-                  android:screenOrientation="unspecified">
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN"/>
-                <category android:name="android.intent.category.LAUNCHER"/>
-            </intent-filter>
-
-            <meta-data android:name="android.app.lib_name" android:value="okularkirigami"/>
-            <meta-data android:name="android.app.qt_sources_resource_id" android:resource="@array/qt_sources"/>
-            <meta-data android:name="android.app.repository" android:value="default"/>
-            <meta-data android:name="android.app.qt_libs_resource_id" android:resource="@array/qt_libs"/>
-            <meta-data android:name="android.app.bundled_libs_resource_id" android:resource="@array/bundled_libs"/>
-            <!-- Deploy Qt libs as part of package -->
-            <meta-data android:name="android.app.bundle_local_qt_libs" android:value="1"/>
-            <meta-data android:name="android.app.bundled_in_lib_resource_id" android:resource="@array/bundled_in_lib"/>
-            <meta-data android:name="android.app.bundled_in_assets_resource_id" android:resource="@array/bundled_in_assets"/>
-            <!-- Run with local libs -->
-            <meta-data android:name="android.app.use_local_qt_libs" android:value="1"/>
-            <meta-data android:name="android.app.libs_prefix" android:value="/data/local/tmp/qt/"/>
-            <meta-data android:name="android.app.load_local_libs" android:value="plugins/platforms/android/libqtforandroid.so:plugins/bearer/libqandroidbearer.so"/>
-            <meta-data android:name="android.app.load_local_jars" android:value="jar/QtAndroid.jar:jar/QtAndroidAccessibility.jar:jar/QtAndroid-bundled.jar:jar/QtAndroidAccessibility-bundled.jar:jar/QtAndroidBearer.jar:jar/QtAndroidBearer-bundled.jar"/>
-            <meta-data android:name="android.app.static_init_classes" android:value=""/>
-            <!--  Messages maps -->
-            <meta-data android:value="@string/ministro_not_found_msg" android:name="android.app.ministro_not_found_msg"/>
-            <meta-data android:value="@string/ministro_needed_msg" android:name="android.app.ministro_needed_msg"/>
-            <meta-data android:value="@string/fatal_error_msg" android:name="android.app.fatal_error_msg"/>
-            <!--  Messages maps -->
-        </activity>
         <activity android:configChanges="orientation|uiMode|screenLayout|screenSize|smallestScreenSize|locale|fontScale|keyboard|keyboardHidden|navigation"
                   android:name="org.kde.something.OpenFileActivity"
                   android:label="Okular"
                   android:hardwareAccelerated="true"
                   android:screenOrientation="unspecified">
 
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
             <intent-filter android:label="Okular">
                 <action android:name="android.intent.action.VIEW"/>
                 <category android:name="android.intent.category.DEFAULT"/>

mobile/android/src/OpenFileActivity.java

@@ -6,6 +6,7 @@ import android.util.Log;
 import android.os.Bundle;
 import android.os.ParcelFileDescriptor;
 import android.net.Uri;
+import android.app.Activity;
 
 import org.qtproject.qt5.android.bindings.QtActivity;
 
@@ -14,16 +15,13 @@ class FileClass
     public static native void openUri(String uri);
 }
 
-public class OpenFileActivity extends QtActivity {
-    @Override
-    public void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        final Intent bundleIntent = getIntent();
-        if (bundleIntent == null)
+public class OpenFileActivity extends QtActivity
+{
+    private void displayUri(Uri uri)
+    {
+        if (uri == null)
             return;
 
-        final String action = bundleIntent.getAction();
-        Uri uri = bundleIntent.getData();
         if (!uri.getScheme().equals("file")) {
             try {
                 ContentResolver resolver = getBaseContext().getContentResolver();
@@ -33,11 +31,49 @@ public class OpenFileActivity extends QtActivity {
                 e.printStackTrace();
 
                 //TODO: emit warning that couldn't be opened
-                Log.v("Okular", "failed to open");
+                Log.e("Okular", "failed to open");
                 return;
             }
         }
 
+        Log.e("Okular", "opening url: " + uri.toString());
         FileClass.openUri(uri.toString());
     }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        final Intent bundleIntent = getIntent();
+        if (bundleIntent == null)
+            return;
+
+        final String action = bundleIntent.getAction();
+        Log.v("Okular", "Starting action: " + action);
+        if (action == "android.intent.action.VIEW") {
+            displayUri(bundleIntent.getData());
+        }
+    }
+
+    private static int OpenDocumentRequest = 42;
+
+    public static void openFile(Activity context, String title, String mimes)
+    {
+        Intent intent = new Intent();
+        intent.setAction(Intent.ACTION_GET_CONTENT);
+        intent.setType("application/pdf");
+        Log.v("Okular", "opening: " + mimes);
+        intent.putExtra(Intent.EXTRA_MIME_TYPES, mimes.split(";"));
+
+        context.startActivityForResult(intent, OpenDocumentRequest);
+    }
+
+    @Override
+    public void onActivityResult(int requestCode, int resultCode, Intent intent) {
+        Log.v("Okular", "Activity Result: " + String.valueOf(requestCode) + " with code: " + String.valueOf(resultCode));
+        if (requestCode == OpenDocumentRequest) {
+            Uri uri = intent.getData();
+            Log.v("Okular", "Opening document: " + uri.toString());
+            displayUri(uri);
+        }
+    }
 }

mobile/app/CMakeLists.txt

@@ -2,7 +2,9 @@ set(CMAKE_AUTORCC ON)
 add_executable(okularkirigami main.cpp app.qrc)
 target_link_libraries(okularkirigami Qt5::Widgets Qt5::Qml KF5::I18n)
 if (ANDROID)
+    find_package(Qt5 COMPONENTS AndroidExtras)
     target_sources(okularkirigami PRIVATE android.cpp)
+    target_link_libraries(okularkirigami Qt5::AndroidExtras)
 endif()
 
 install(TARGETS okularkirigami ${KDE_INSTALL_TARGETS_DEFAULT_ARGS})

mobile/app/android.cpp

@@ -17,6 +17,32 @@
  *************************************************************************************/
 
 #include "android.h"
+#include <QAndroidJniObject>
+#include <QAndroidJniEnvironment>
+#include <QStringList>
+#include <QDebug>
+
+static AndroidInstance* s_instance = nullptr;
+
+void AndroidInstance::openFile(const QString &title, const QStringList &mimes)
+{
+    s_instance = this;
+    QAndroidJniObject activity = QAndroidJniObject::callStaticObjectMethod("org/qtproject/qt5/android/QtNative", "activity", "()Landroid/app/Activity;");   //activity is valid
+    Q_ASSERT ( activity.isValid() );
+
+    QAndroidJniEnvironment _env;
+    QAndroidJniObject::callStaticMethod<void>("org/kde/something/OpenFileActivity",
+                                                "openFile",
+                                                "(Landroid/app/Activity;Ljava/lang/String;Ljava/lang/String;)V",
+                                                activity.object<jobject>(),
+                                                QAndroidJniObject::fromString(title).object<jstring>(),
+                                                QAndroidJniObject::fromString(mimes.join(';')).object<jstring>()
+                                             );
+    if (_env->ExceptionCheck()) {
+        _env->ExceptionClear();
+        qWarning() << "couldn't launch intent";
+    }
+}
 
 void Java_org_kde_something_FileClass_openUri(JNIEnv *env,
                                                     jobject /*obj*/,
@@ -24,7 +50,11 @@ void Java_org_kde_something_FileClass_openUri(JNIEnv *env,
 {
     jboolean isCopy = false;
     const char* utf = env->GetStringUTFChars(uri, &isCopy);
-    handler.openUri(QString::fromUtf8(utf));
+    const QString uriString = QString::fromUtf8(utf);
+    if (s_instance)
+        s_instance->openUri(QUrl(uriString));
+    else
+        handler.openUri(uriString);
     env->ReleaseStringUTFChars(uri, utf);
 
 }

mobile/app/android.h

@@ -19,7 +19,8 @@
 #ifndef ANDROID_H
 #define ANDROID_H
 
-#include <QString>
+#include <QObject>
+#include <QUrl>
 #include <jni.h>
 
 class URIHandler {
@@ -33,6 +34,16 @@ public:
 
 static URIHandler handler;
 
+class AndroidInstance : public QObject
+{
+    Q_OBJECT
+public:
+    Q_SCRIPTABLE void openFile(const QString &title, const QStringList &mimes);
+
+Q_SIGNALS:
+    void openUri(const QUrl &uri);
+};
+
 extern "C" {
 
 JNIEXPORT void JNICALL

mobile/app/main.cpp

@@ -49,8 +49,10 @@ int main(int argc, char *argv[])
     QQmlApplicationEngine engine;
 
 #ifdef __ANDROID__
+    qmlRegisterSingletonType<QObject>("org.kde.okular.app", 2, 0, "AndroidInstance", [](QQmlEngine*, QJSEngine*) -> QObject* { return new AndroidInstance; });
     const QString uri = handler.m_lastUrl;
 #else
+    qmlRegisterSingletonType<QObject>("org.kde.okular.app", 2, 0, "AndroidInstance", [](QQmlEngine*, QJSEngine*) -> QObject* { return new QObject; });
     const QString uri = parser.positionalArguments().count() == 1
                       ? QUrl::fromUserInput(parser.positionalArguments().constFirst(), {}, QUrl::AssumeLocalFile).toString()
                       : QString();

mobile/app/package/contents/ui/main.qml

@@ -21,6 +21,7 @@ import QtQuick 2.1
 import QtQuick.Dialogs 1.3 as QQD
 import org.kde.okular 2.0 as Okular
 import org.kde.kirigami 2.0 as Kirigami
+import org.kde.okular.app 2.0
 
 Kirigami.AbstractApplicationWindow {
     id: fileBrowserRoot
@@ -47,6 +48,22 @@ Kirigami.AbstractApplicationWindow {
                 onTriggered: {
                     fileDialog.open()
                 }
+            },
+            Kirigami.Action {
+                text: i18n("Open Android...")
+                icon.name: "document-open"
+                readonly property var p0: Connections {
+                    target: AndroidInstance
+                    enabled: AndroidInstance.hasOwnProperty("openFile")
+                    onOpenUri: {
+                        console.log("open uri!", uri)
+                        documentItem.url = uri
+                    }
+                }
+                onTriggered: {
+//                     var mimetypes = Okular.Okular.mimeTypes.join(",")
+                    AndroidInstance.openFile(i18n("Document to open..."), "*/*")
+                }
             }
         ]
     }