UPDATE: Migrate to SDK v2.

Author: oasisfeng

build.gradle

@@ -5,7 +5,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.3.2'
+        classpath 'com.android.tools.build:gradle:3.5.0-rc01'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
@@ -20,7 +20,7 @@ repositories {
 if (! project.plugins.hasPlugin("com.android.feature")) apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 28
+    compileSdkVersion 29
 
     defaultConfig {
         minSdkVersion 23
@@ -41,7 +41,7 @@ android {
 }
 
 dependencies {
-    implementation 'com.oasisfeng.nevo:sdk:1.2.0'
+    implementation 'com.oasisfeng.nevo:sdk:2.0.0-rc01'
     implementation 'androidx.core:core:1.0.1'
 
     androidTestImplementation 'androidx.test:runner:1.1.1'

src/main/java/com/oasisfeng/nevo/decorators/wechat/WeChatDecorator.java

@@ -87,14 +87,14 @@ public class WeChatDecorator extends NevoDecoratorService {
 	static final String ACTION_SETTINGS_CHANGED = "SETTINGS_CHANGED";
 	static final String ACTION_DEBUG_NOTIFICATION = "DEBUG";
 
-	@Override public void apply(final MutableStatusBarNotification evolving) {
+	@Override public boolean apply(final MutableStatusBarNotification evolving) {
 		final MutableNotification n = evolving.getNotification();
 		final Bundle extras = n.extras;
 
 		CharSequence title = extras.getCharSequence(EXTRA_TITLE);
 		if (title == null || title.length() == 0) {
 			Log.e(TAG, "Title is missing: " + evolving);
-			return;
+			return false;
 		}
 		if (title != (title = EmojiTranslator.translate(title))) extras.putCharSequence(EXTRA_TITLE, title);
 		n.color = PRIMARY_COLOR;        // Tint the small icon
@@ -105,10 +105,10 @@ public class WeChatDecorator extends NevoDecoratorService {
 			n.setGroup(GROUP_MISC);		// Avoid being auto-grouped
 			if (! mOngoingCallTweaker.apply(this, evolving.getOriginalKey(), n))
 				Log.d(TAG, "Skip further process for non-conversation notification: " + title);    // E.g. web login confirmation notification.
-			return;
+			return true;
 		}
 		final CharSequence content_text = extras.getCharSequence(EXTRA_TEXT);
-		if (content_text == null) return;
+		if (content_text == null) return true;
 
 		// WeChat previously uses dynamic counter starting from 4097 as notification ID, which is reused after cancelled by WeChat itself,
 		//   causing conversation duplicate or overwritten notifications.
@@ -140,16 +140,17 @@ public class WeChatDecorator extends NevoDecoratorService {
 		MessagingStyle messaging = mMessagingBuilder.buildFromExtender(conversation, evolving);
 		if (messaging == null)	// EXTRA_TEXT will be written in buildFromArchive()
 			messaging = mMessagingBuilder.buildFromArchive(conversation, n, title, getArchivedNotifications(evolving.getOriginalKey(), MAX_NUM_ARCHIVED));
-		if (messaging == null) return;
+		if (messaging == null) return true;
 		final List<MessagingStyle.Message> messages = messaging.getMessages();
-		if (messages.isEmpty()) return;
+		if (messages.isEmpty()) return true;
 
 		if (is_group_chat) messaging.setGroupConversation(true).setConversationTitle(title);
 		MessagingBuilder.flatIntoExtras(messaging, extras);
 		extras.putString(Notification.EXTRA_TEMPLATE, TEMPLATE_MESSAGING);
 
 		if (SDK_INT >= N && extras.getCharSequenceArray(Notification.EXTRA_REMOTE_INPUT_HISTORY) != null)
 			n.flags |= Notification.FLAG_ONLY_ALERT_ONCE;		// No more alert for direct-replied notification.
+		return true;
 	}
 
 	private boolean isDistinctId(final Notification n, final String pkg) {
@@ -168,15 +169,16 @@ private boolean isDistinctId(final Notification n, final String pkg) {
 	}
 	private Boolean mDistinctIdSupported;
 
-	@Override protected void onNotificationRemoved(final String key, final int reason) {
-		if (reason == REASON_APP_CANCEL) {		// Only if "Removal-Aware" of Nevolution is activated
+	@Override protected boolean onNotificationRemoved(final String key, final int reason) {
+		if (reason == REASON_APP_CANCEL) {		// For ongoing notification, or if "Removal-Aware" of Nevolution is activated
 			Log.d(TAG, "Cancel notification: " + key);
 			mOngoingCallTweaker.onNotificationRemoved(key);
 		} else if (reason == REASON_CHANNEL_BANNED) {	// In case WeChat deleted our notification channel for group conversation in Insider delivery mode
 			mHandler.post(() -> reviveNotification(key));
 		} else if (SDK_INT < O || reason == REASON_CANCEL) {	// Exclude the removal request by us in above case. (Removal-Aware is only supported on Android 8+)
 			mMessagingBuilder.markRead(key);
 		}
+		return false;
 	}
 
 	@Override protected void onConnected() {