[Android] Support opening search page with shared text. Close #261

android/app/src/main/AndroidManifest.xml

@@ -47,6 +47,11 @@
                 <category android:name="android.intent.category.BROWSABLE" />
                 <data android:scheme="https" android:host="exhentai.org" android:pathPrefix="/g" />
             </intent-filter>
+            <intent-filter android:label="@string/share_text">
+                <action android:name="android.intent.action.SEND" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <data android:mimeType="text/plain" />
+            </intent-filter>
         </activity>
         <!-- Don't delete the meta-data below.
              This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->

android/app/src/main/kotlin/com/github/wgh136/venera/MainActivity.kt

@@ -7,6 +7,7 @@ import android.content.Intent
 import android.content.pm.PackageManager
 import android.net.Uri
 import android.os.Build
+import android.os.Bundle
 import android.os.Environment
 import android.provider.Settings
 import android.util.Log
@@ -40,6 +41,41 @@ class MainActivity : FlutterFragmentActivity() {
 
     private val nextLocalRequestCode = AtomicInteger()
 
+    private val sharedTexts = ArrayList<String>()
+
+    private var textShareHandler: ((String) -> Unit)? = null
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        if (intent?.action == Intent.ACTION_SEND) {
+            if (intent.type == "text/plain") {
+                val text = intent.getStringExtra(Intent.EXTRA_TEXT)
+                if (text != null)
+                    handleSharedText(text)
+            }
+        }
+    }
+
+    override fun onNewIntent(intent: Intent) {
+        super.onNewIntent(intent)
+        if (intent.action == Intent.ACTION_SEND) {
+            if (intent.type == "text/plain") {
+                val text = intent.getStringExtra(Intent.EXTRA_TEXT)
+                if (text != null)
+                    handleSharedText(text)
+            }
+        }
+    }
+
+    private fun handleSharedText(text: String) {
+        if (textShareHandler != null) {
+            textShareHandler?.invoke(text)
+        } else {
+            sharedTexts.add(text)
+        }
+    }
+
     private fun <I, O> startContractForResult(
         contract: ActivityResultContract<I, O>,
         input: I,
@@ -134,6 +170,26 @@ class MainActivity : FlutterFragmentActivity() {
             val mimeType = req.arguments<String>()
             openFile(res, mimeType!!)
         }
+
+        val shareTextChannel = EventChannel(flutterEngine.dartExecutor.binaryMessenger, "venera/text_share")
+        shareTextChannel.setStreamHandler(
+            object : EventChannel.StreamHandler {
+                override fun onListen(arguments: Any?, events: EventChannel.EventSink) {
+                    textShareHandler = {text ->
+                        events.success(text)
+                    }
+                    if (sharedTexts.isNotEmpty()) {
+                        for (text in sharedTexts) {
+                            events.success(text)
+                        }
+                        sharedTexts.clear()
+                    }
+                }
+
+                override fun onCancel(arguments: Any?) {
+                    textShareHandler = null
+                }
+            })
     }
 
     private fun getProxy(): String {

android/app/src/main/res/values-zh-rCN/strings.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="share_text">搜索</string>
+</resources>

android/app/src/main/res/values-zh/strings.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="share_text">搜尋</string>
+</resources>

android/app/src/main/res/values/strings.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="share_text">Search</string>
+</resources>

lib/init.dart

@@ -11,6 +11,7 @@ import 'package:venera/pages/comic_source_page.dart';
 import 'package:venera/pages/follow_updates_page.dart';
 import 'package:venera/pages/settings/settings_page.dart';
 import 'package:venera/utils/app_links.dart';
+import 'package:venera/utils/handle_text_share.dart';
 import 'package:venera/utils/tags_translation.dart';
 import 'package:venera/utils/translations.dart';
 import 'foundation/appdata.dart';
@@ -45,6 +46,7 @@ Future<void> init() async {
   _checkOldConfigs();
   if (App.isAndroid) {
     handleLinks();
+    handleTextShare();
   }
   FlutterError.onError = (details) {
     Log.error("Unhandled Exception", "${details.exception}\n${details.stack}");

lib/utils/handle_text_share.dart

@@ -0,0 +1,22 @@
+import 'package:flutter/services.dart';
+import 'package:venera/foundation/app.dart';
+import 'package:venera/pages/aggregated_search_page.dart';
+
+bool _isHandling = false;
+
+/// Handle text share event.
+/// App will navigate to [AggregatedSearchPage] with the shared text as keyword.
+void handleTextShare() async {
+  if (_isHandling) return;
+  _isHandling = true;
+
+  var channel = EventChannel('venera/text_share');
+  await for (var event in channel.receiveBroadcastStream()) {
+    if (App.mainNavigatorKey == null) {
+      await Future.delayed(const Duration(milliseconds: 200));
+    }
+    if (event is String) {
+      App.rootContext.to(() => AggregatedSearchPage(keyword: event));
+    }
+  }
+}