add a back button

FCL/src/main/java/com/tungsten/fcl/activity/MainActivity.java

@@ -85,6 +85,7 @@ public class MainActivity extends FCLActivity implements FCLMenuView.OnSelectLis
     private FCLImageView icon;
     private FCLTextView versionName;
     private FCLTextView versionHint;
+    private FCLButton back;
     private FCLButton launch;
 
     private ObjectProperty<Account> currentAccount;
@@ -164,12 +165,14 @@ public class MainActivity extends FCLActivity implements FCLMenuView.OnSelectLis
             icon = findViewById(R.id.icon);
             versionName = findViewById(R.id.version_name);
             versionHint = findViewById(R.id.version_hint);
+            back = findViewById(R.id.back);
             launch = findViewById(R.id.launch);
             account.setOnClickListener(this);
             version.setOnClickListener(this);
+            back.setOnClickListener(this);
             launch.setOnClickListener(this);
-            launch.setOnLongClickListener(view ->{
-                startActivity(new Intent(MainActivity.this,ShellActivity.class));
+            launch.setOnLongClickListener(view -> {
+                startActivity(new Intent(MainActivity.this, ShellActivity.class));
                 return true;
             });
 
@@ -298,6 +301,11 @@ public class MainActivity extends FCLActivity implements FCLMenuView.OnSelectLis
             titleView.setTextWithAnim(getString(R.string.version));
             uiManager.switchUI(uiManager.getVersionUI());
         }
+        if (view == back) {
+            if (uiManager != null) {
+                uiManager.onBackPressed();
+            }
+        }
         if (view == launch) {
             Versions.launch(this, Profiles.getSelectedProfile());
         }

FCL/src/main/res/layout/activity_main.xml

@@ -233,9 +233,18 @@
             android:layout_width="0dp"
             android:layout_height="0dp"
             android:layout_weight="1"/>
+
+        <com.tungsten.fcllibrary.component.view.FCLButton
+            android:id="@+id/back"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/button_back"
+            android:layout_marginTop="10dp"
+            app:ripple="true"/>
         
         <com.tungsten.fcllibrary.component.view.FCLButton
             android:id="@+id/launch"
+            android:layout_marginTop="10dp"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:text="@string/launch"

FCL/src/main/res/values-zh/strings.xml

@@ -92,6 +92,7 @@
     <string name="assets_download_all">检查资源文件完整性</string>
     <string name="assets_index_malformed">资源文件的索引文件损坏。</string>
 
+    <string name="button_back">返回</string>
     <string name="button_cancel">取消</string>
     <string name="button_download">下载</string>
     <string name="button_export">导出</string>

FCL/src/main/res/values/strings.xml

@@ -104,6 +104,7 @@
     <string name="assets_download_all">Validating assets integrity</string>
     <string name="assets_index_malformed">Index files of downloaded assets were corrupted.</string>
 
+    <string name="button_back">Back</string>
     <string name="button_cancel">Cancel</string>
     <string name="button_download">Download</string>
     <string name="button_export">Export</string>