Lombok/Bug fix/DLC(in progress)

.idea/compiler.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <annotationProcessing>
+      <profile default="true" name="Default" enabled="true" />
+    </annotationProcessing>
+  </component>
+</project>

app/build.gradle

@@ -47,6 +47,7 @@ dependencies {
     implementation 'com.afollestad.material-dialogs:core:0.9.6.0'
     // https://mvnrepository.com/artifact/com.jakewharton/butterknife
     implementation 'com.jakewharton:butterknife:10.2.1'
+    implementation 'androidx.recyclerview:recyclerview:1.1.0'
     annotationProcessor 'com.jakewharton:butterknife-compiler:10.2.1'
     // https://mvnrepository.com/artifact/com.google.guava/guava
     implementation group: 'com.google.guava', name: 'guava', version: '28.2-android'
@@ -54,9 +55,15 @@ dependencies {
     implementation group: 'org.zeroturnaround', name: 'zt-zip', version: '1.14'
     // https://mvnrepository.com/artifact/com.google.code.gson/gson
     implementation group: 'com.google.code.gson', name: 'gson', version: '2.8.6'
+    // https://mvnrepository.com/artifact/org.apache.commons/commons-lang3
+    implementation group: 'org.apache.commons', name: 'commons-lang3', version: '3.9'
+    implementation 'com.lzy.net:okgo:3.0.4'
 
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
     implementation 'com.android.support:multidex:1.0.3'
+
+    compileOnly 'org.projectlombok:lombok:1.18.12'
+    annotationProcessor 'org.projectlombok:lombok:1.18.12'
 }

app/proguard-rules.pro

@@ -146,6 +146,13 @@
 }
 
 ##---------------End: proguard configuration for Gson  ----------
+#okhttp
+-dontwarn okhttp3.**
+-keep class okhttp3.**{*;}
+
+#okio
+-dontwarn okio.**
+-keep class okio.**{*;}
 
 -keep class com.zane.** { *; }
 -keep class pxb.android.** { *; }

app/src/main/AndroidManifest.xml

@@ -2,12 +2,14 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.zane.smapiinstaller">
 
+    <uses-permission android:name="android.permission.INTERNET"/>
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
     <uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES"/>
     <uses-permission android:name="android.permission.REQUEST_DELETE_PACKAGES"/>
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
 
     <application
+        android:name=".MainApplication"
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"

app/src/main/assets/apk_files_manifest.json

@@ -1,4 +1,8 @@
-[
+{
+  "minBuildCode": 138,
+  "maxBuildCode": null,
+  "withMonoMod": true,
+  "manifestEntries": [
     {
       "targetPath": "classes.dex",
       "assetPath": "apk/classes.dex",
@@ -59,4 +63,5 @@
       "assetPath": "apk/System.Numerics.dll",
       "compression": 0
     }
-]
+  ]
+}

app/src/main/assets/downloadable_content_list.json

@@ -0,0 +1,17 @@
+{
+  "version": 1,
+  "contents": [
+    {
+      "type": "COMPAT",
+      "name": "SMAPI for 1.4.5.135",
+      "description": "SMAPI compat package pack for game 1.4.5.135 - 1.4.5.137",
+      "url": "http://dl.zaneyork.cn"
+    },
+    {
+      "type": "COMPAT",
+      "name": "SMAPI for 1.4.4.122",
+      "description": "SMAPI compat package pack for game 1.4.4.122 - 1.4.4.128",
+      "url": "http://dl.zaneyork.cn"
+    }
+  ]
+}

app/src/main/assets/mods_manifest.json

@@ -2,7 +2,7 @@
   {
     "assetPath":"mods/virtual-keyboard.zip",
     "Name": "VirtualKeyboard",
-    "UniqueID": "SMAPI.VirtualKeyboard"
+    "UniqueID": "VirtualKeyboard"
   },
   {
     "assetPath":"mods/custom-localization.zip",

app/src/main/java/com/zane/smapiinstaller/MainApplication.java

@@ -0,0 +1,13 @@
+package com.zane.smapiinstaller;
+
+import android.app.Application;
+
+import com.lzy.okgo.OkGo;
+
+public class MainApplication extends Application {
+    @Override
+    public void onCreate() {
+        super.onCreate();
+        OkGo.getInstance().init(this);
+    }
+}

app/src/main/java/com/zane/smapiinstaller/entity/ApkFilesManifest.java

@@ -0,0 +1,12 @@
+package com.zane.smapiinstaller.entity;
+
+import java.util.List;
+
+import lombok.Data;
+
+@Data
+public class ApkFilesManifest {
+    private Long minBuildCode;
+    private Long maxBuildCode;
+    private List<ManifestEntry> manifestEntries;
+}

app/src/main/java/com/zane/smapiinstaller/entity/DownloadableContent.java

@@ -0,0 +1,11 @@
+package com.zane.smapiinstaller.entity;
+
+import lombok.Data;
+
+@Data
+public class DownloadableContent {
+    private String type;
+    private String name;
+    private String url;
+    private String description;
+}

app/src/main/java/com/zane/smapiinstaller/entity/DownloadableContentList.java

@@ -0,0 +1,11 @@
+package com.zane.smapiinstaller.entity;
+
+import java.util.List;
+
+import lombok.Data;
+
+@Data
+public class DownloadableContentList {
+    private int version;
+    List<DownloadableContent> contents;
+}

app/src/main/java/com/zane/smapiinstaller/entity/ManifestEntry.java

@@ -1,40 +1,11 @@
 package com.zane.smapiinstaller.entity;
 
+import lombok.Data;
+
+@Data
 public class ManifestEntry {
     private String targetPath;
     private String assetPath;
     private int compression;
     private int origin;
-
-    public String getTargetPath() {
-        return targetPath;
-    }
-
-    public void setTargetPath(String targetPath) {
-        this.targetPath = targetPath;
-    }
-
-    public String getAssetPath() {
-        return assetPath;
-    }
-
-    public void setAssetPath(String assetPath) {
-        this.assetPath = assetPath;
-    }
-
-    public int getCompression() {
-        return compression;
-    }
-
-    public void setCompression(int compression) {
-        this.compression = compression;
-    }
-
-    public int getOrigin() {
-        return origin;
-    }
-
-    public void setOrigin(int origin) {
-        this.origin = origin;
-    }
 }

app/src/main/java/com/zane/smapiinstaller/entity/ModManifestEntry.java

@@ -1,41 +1,12 @@
 package com.zane.smapiinstaller.entity;
 
+import lombok.Data;
+
+@Data
 public class ModManifestEntry {
     private String assetPath;
     private String Name;
     private String UniqueID;
     private String Description;
     private ModManifestEntry ContentPackFor;
-
-    public String getAssetPath() {
-        return assetPath;
-    }
-
-    public void setAssetPath(String assetPath) {
-        this.assetPath = assetPath;
-    }
-
-    public String getName() {
-        return Name;
-    }
-
-    public void setName(String name) {
-        Name = name;
-    }
-
-    public String getUniqueID() {
-        return UniqueID;
-    }
-
-    public void setUniqueID(String uniqueID) {
-        UniqueID = uniqueID;
-    }
-
-    public String getDescription() {
-        return Description;
-    }
-
-    public void setDescription(String description) {
-        Description = description;
-    }
 }

app/src/main/java/com/zane/smapiinstaller/logic/ApkPatcher.java

@@ -11,16 +11,20 @@ import android.os.Environment;
 import android.util.Log;
 
 import com.google.common.base.Predicate;
+import com.google.common.collect.Iterables;
+import com.google.common.collect.Lists;
 import com.google.common.io.Files;
 import com.google.gson.reflect.TypeToken;
 import com.zane.smapiinstaller.BuildConfig;
 import com.zane.smapiinstaller.R;
 import com.zane.smapiinstaller.constant.Constants;
+import com.zane.smapiinstaller.entity.ApkFilesManifest;
 import com.zane.smapiinstaller.entity.ManifestEntry;
 
 import net.fornwall.apksigner.KeyStoreFileManager;
 import net.fornwall.apksigner.ZipSigner;
 
+import org.apache.commons.lang3.StringUtils;
 import org.zeroturnaround.zip.ByteSource;
 import org.zeroturnaround.zip.ZipEntrySource;
 import org.zeroturnaround.zip.ZipUtil;
@@ -29,7 +33,6 @@ import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import java.security.KeyStore;
-import java.security.NoSuchAlgorithmException;
 import java.security.PrivateKey;
 import java.security.cert.X509Certificate;
 import java.util.ArrayList;
@@ -48,6 +51,8 @@ public class ApkPatcher {
 
     private static final String TAG = "PATCHER";
 
+    private AtomicReference<String> errorMessage = new AtomicReference<>();
+
     public ApkPatcher(Context context) {
         this.context = context;
     }
@@ -56,8 +61,10 @@ public class ApkPatcher {
         PackageManager packageManager = context.getPackageManager();
         List<String> packageNames = CommonLogic.getAssetJson(context, "package_names.json", new TypeToken<List<String>>() {
         }.getType());
-        if (packageNames == null)
+        if (packageNames == null) {
+            errorMessage.set(context.getString(R.string.error_game_not_found));
             return null;
+        }
         for (String packageName : packageNames) {
             try {
                 PackageInfo packageInfo = packageManager.getPackageInfo(packageName, 0);
@@ -69,6 +76,7 @@ public class ApkPatcher {
                     File dest = new File(externalFilesDir.getAbsolutePath() + "/SMAPI Installer/");
                     if (!dest.exists()) {
                         if (!dest.mkdir()) {
+                            errorMessage.set(String.format(context.getString(R.string.error_failed_to_create_file), dest.getAbsolutePath()));
                             return null;
                         }
                     }
@@ -78,6 +86,7 @@ public class ApkPatcher {
                 }
             } catch (PackageManager.NameNotFoundException | IOException e) {
                 Log.e(TAG, "Extract error", e);
+                errorMessage.set(e.getLocalizedMessage());
             }
         }
         return null;
@@ -90,29 +99,36 @@ public class ApkPatcher {
         if (!file.exists())
             return false;
         try {
-            List<ManifestEntry> manifestEntries = CommonLogic.getAssetJson(context, "apk_files_manifest.json", new TypeToken<List<ManifestEntry>>() {
+            ApkFilesManifest apkFilesManifest = CommonLogic.getAssetJson(context, "apk_files_manifest.json", ApkFilesManifest.class);
-            }.getType());
+            if (apkFilesManifest == null)
-            if (manifestEntries == null)
                 return false;
+            List<ManifestEntry> manifestEntries = apkFilesManifest.getManifestEntries();
             List<ZipEntrySource> zipEntrySourceList = new ArrayList<>();
-            for (ManifestEntry entry : manifestEntries) {
-                zipEntrySourceList.add(new ByteSource(entry.getTargetPath(), CommonLogic.getAssetBytes(context, entry.getAssetPath()), entry.getCompression()));
-            }
             byte[] manifest = ZipUtil.unpackEntry(file, "AndroidManifest.xml");
-            byte[] modifiedManifest = modifyManifest(manifest);
+            List<ApkFilesManifest> apkFilesManifests = Lists.newArrayList(apkFilesManifest);
+            byte[] modifiedManifest = modifyManifest(manifest, apkFilesManifests);
+            if(apkFilesManifests.size() == 0) {
+                errorMessage.set(context.getString(R.string.error_no_supported_game_version));
+                return false;
+            }
             if(modifiedManifest == null) {
+                errorMessage.set(context.getString(R.string.failed_to_process_manifest));
                 return false;
             }
             zipEntrySourceList.add(new ByteSource("AndroidManifest.xml", modifiedManifest, Deflater.DEFLATED));
+            for (ManifestEntry entry : manifestEntries) {
+                zipEntrySourceList.add(new ByteSource(entry.getTargetPath(), CommonLogic.getAssetBytes(context, entry.getAssetPath()), entry.getCompression()));
+            }
             ZipUtil.addOrReplaceEntries(file, zipEntrySourceList.toArray(new ZipEntrySource[0]));
             return true;
         } catch (Exception e) {
             Log.e(TAG, "Patch error", e);
+            errorMessage.set(e.getLocalizedMessage());
         }
         return false;
     }
 
-    private byte[] modifyManifest(byte[] bytes) {
+    private byte[] modifyManifest(byte[] bytes, List<ApkFilesManifest> manifests) {
         AtomicReference<String> packageName = new AtomicReference<>();
         Predicate<ManifestTagVisitor.AttrArgs> processLogic = (attr) -> {
             if (attr.type == NodeVisitor.TYPE_STRING) {
@@ -140,9 +156,32 @@ public class ApkPatcher {
                         break;
                 }
             }
+            else if(attr.type == NodeVisitor.TYPE_FIRST_INT) {
+                if(StringUtils.equals(attr.name, "versionCode")){
+                    long versionCode = (int) attr.obj;
+                    Iterables.removeIf(manifests, manifest -> {
+                        if (manifest.getMinBuildCode() != null) {
+                            if (versionCode < manifest.getMinBuildCode()) {
+                                return true;
+                            }
+                        }
+                        if (manifest.getMaxBuildCode() != null) {
+                            if (versionCode > manifest.getMinBuildCode()) {
+                                return true;
+                            }
+                        }
+                        return false;
+                    });
+                }
+            }
             return true;
         };
+        try {
             return CommonLogic.modifyManifest(bytes, processLogic);
+        }catch (Exception e) {
+            errorMessage.set(e.getLocalizedMessage());
+            return null;
+        }
     }
 
     public String sign(String apkPath) {
@@ -156,16 +195,14 @@ public class ApkPatcher {
                 }
                 String alias = ks.aliases().nextElement();
                 X509Certificate publicKey = (X509Certificate) ks.getCertificate(alias);
-                try {
                 PrivateKey privateKey = (PrivateKey) ks.getKey(alias, "android".toCharArray());
                 ZipSigner.signZip(publicKey, privateKey, "SHA1withRSA", apkPath, signApkPath);
                 new File(apkPath).delete();
                 return signApkPath;
-                } catch (NoSuchAlgorithmException ignored) {
-                }
             }
         } catch (Exception e) {
             Log.e(TAG, "Sign error", e);
+            errorMessage.set(e.getLocalizedMessage());
         }
         return null;
     }
@@ -179,6 +216,7 @@ public class ApkPatcher {
             context.startActivity(intent);
         } catch (ActivityNotFoundException e) {
             Log.e(TAG, "Install error", e);
+            errorMessage.set(e.getLocalizedMessage());
         }
     }
 
@@ -196,4 +234,7 @@ public class ApkPatcher {
             return Uri.fromFile(file);
     }
 
+    public AtomicReference<String> getErrorMessage() {
+        return errorMessage;
+    }
 }

app/src/main/java/com/zane/smapiinstaller/logic/CommonLogic.java

@@ -59,6 +59,17 @@ public class CommonLogic {
         return null;
     }
 
+    public static <T> T getAssetJson(Context context, String filename, Class<T> tClass) {
+        try {
+            InputStream inputStream = context.getAssets().open(filename);
+            try (InputStreamReader reader = new InputStreamReader(inputStream, StandardCharsets.UTF_8)) {
+                return new Gson().fromJson(CharStreams.toString(reader), tClass);
+            }
+        } catch (IOException ignored) {
+        }
+        return null;
+    }
+
     public static <T> T getAssetJson(Context context, String filename, Type type) {
         try {
             InputStream inputStream = context.getAssets().open(filename);
@@ -177,10 +188,9 @@ public class CommonLogic {
         context.startActivity(intent);
     }
 
-    public static byte[] modifyManifest(byte[] bytes, Predicate<ManifestTagVisitor.AttrArgs> processLogic) {
+    public static byte[] modifyManifest(byte[] bytes, Predicate<ManifestTagVisitor.AttrArgs> processLogic) throws IOException {
         AxmlReader reader = new AxmlReader(bytes);
         AxmlWriter writer = new AxmlWriter();
-        try {
         reader.accept(new AxmlVisitor(writer) {
             @Override
             public NodeVisitor child(String ns, String name) {
@@ -188,14 +198,6 @@ public class CommonLogic {
                 return new ManifestTagVisitor(child, processLogic);
             }
         });
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
-        try {
         return writer.toByteArray();
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
-        return null;
     }
 }

app/src/main/java/com/zane/smapiinstaller/logic/GameLauncher.java

@@ -26,8 +26,11 @@ public class GameLauncher {
                 CommonLogic.showAlertDialog(root, R.string.error, R.string.error_failed_to_repair);
                 return;
             }
+            ModAssetsManager modAssetsManager = new ModAssetsManager(root);
+            if(modAssetsManager.checkModEnvironment()) {
                 Intent intent = packageManager.getLaunchIntentForPackage(Constants.TARGET_PACKAGE_NAME);
                 context.startActivity(intent);
+            }
         } catch (PackageManager.NameNotFoundException ignored) {
             CommonLogic.showAlertDialog(root, R.string.error, R.string.error_smapi_not_installed);
         }

app/src/main/java/com/zane/smapiinstaller/logic/ModAssetsManager.java

@@ -16,6 +16,8 @@ import com.zane.smapiinstaller.R;
 import com.zane.smapiinstaller.constant.Constants;
 import com.zane.smapiinstaller.entity.ModManifestEntry;
 
+import org.apache.commons.lang3.StringUtils;
+import org.zeroturnaround.zip.NameMapper;
 import org.zeroturnaround.zip.ZipUtil;
 
 import java.io.File;
@@ -23,6 +25,7 @@ import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.ConcurrentLinkedQueue;
+import java.util.concurrent.atomic.AtomicLong;
 
 public class ModAssetsManager {
 
@@ -43,7 +46,7 @@ public class ModAssetsManager {
             if(currentFile != null && currentFile.exists()) {
                 boolean foundManifest = false;
                 for(File file : currentFile.listFiles(File::isFile)) {
-                    if(file.getName().equalsIgnoreCase("manifest.json")) {
+                    if(StringUtils.equalsIgnoreCase(file.getName(), "manifest.json")) {
                         ModManifestEntry manifest = CommonLogic.getFileJson(file, new TypeToken<ModManifestEntry>(){}.getType());
                         foundManifest = true;
                         if(manifest != null) {
@@ -70,7 +73,7 @@ public class ModAssetsManager {
         File modFolder = new File(Environment.getExternalStorageDirectory(), Constants.MOD_PATH);
         ImmutableListMultimap<String, ModManifestEntry> installedModMap = Multimaps.index(findAllInstalledMods(), ModManifestEntry::getUniqueID);
         for (ModManifestEntry mod : modManifestEntries) {
-            if(installedModMap.containsKey(mod.getUniqueID())) {
+            if(installedModMap.containsKey(mod.getUniqueID()) || installedModMap.containsKey(mod.getUniqueID().replace("ZaneYork.CustomLocalization", "SMAPI.CustomLocalization"))) {
                 ImmutableList<ModManifestEntry> installedMods = installedModMap.get(mod.getUniqueID());
                 if(installedMods.size() > 1) {
                     CommonLogic.showAlertDialog(root, R.string.error,
@@ -79,7 +82,7 @@ public class ModAssetsManager {
                     return false;
                 }
                 try {
-                    ZipUtil.unpackEntry(context.getAssets().open(mod.getAssetPath()), mod.getName(), new File(installedMods.get(0).getAssetPath()));
+                    ZipUtil.unpack(context.getAssets().open(mod.getAssetPath()), new File(installedMods.get(0).getAssetPath()), (name)-> StringUtils.removeStart(name, mod.getName() + "/"));
                 } catch (IOException e) {
                     Log.e(TAG, "Install Mod Error", e);
                 }
@@ -94,4 +97,8 @@ public class ModAssetsManager {
         }
         return true;
     }
+
+    public boolean checkModEnvironment() {
+        return true;
+    }
 }

app/src/main/java/com/zane/smapiinstaller/ui/config/ConfigEditFragment.java

@@ -61,7 +61,7 @@ public class ConfigEditFragment extends Fragment {
             }
         }
         catch (Exception e) {
-            CommonLogic.showAlertDialog(getView(), R.string.error, e.getMessage());
+            CommonLogic.showAlertDialog(getView(), R.string.error, e.getLocalizedMessage());
         }
     }
 

app/src/main/java/com/zane/smapiinstaller/ui/config/ConfigFragment.java

@@ -17,7 +17,6 @@ import com.zane.smapiinstaller.R;
 
 public class ConfigFragment extends Fragment {
 
-    private ConfigViewModel configViewModel;
 
     @BindView(R.id.view_mod_list)
     RecyclerView recyclerView;
@@ -26,13 +25,11 @@ public class ConfigFragment extends Fragment {
                              ViewGroup container, Bundle savedInstanceState) {
         View root = inflater.inflate(R.layout.fragment_config, container, false);
         ButterKnife.bind(this, root);
-        configViewModel = new ConfigViewModel(root);
         recyclerView.setLayoutManager(new LinearLayoutManager(this.getContext()));
-        recyclerView.setAdapter(new ModManifestAdapter(configViewModel.getModList().getValue()));
+        ConfigViewModel configViewModel = new ConfigViewModel(root);
-        recyclerView.addItemDecoration(new DividerItemDecoration(this.getContext(), DividerItemDecoration.VERTICAL));
+        ModManifestAdapter modManifestAdapter = new ModManifestAdapter(configViewModel);
-        configViewModel.getModList().observe(getViewLifecycleOwner(), modList -> {
+        recyclerView.setAdapter(modManifestAdapter);
-            recyclerView.getAdapter().notifyDataSetChanged();
+        recyclerView.addItemDecoration(new DividerItemDecoration(recyclerView.getContext(), DividerItemDecoration.VERTICAL));
-        });
         return root;
     }
 }

app/src/main/java/com/zane/smapiinstaller/ui/config/ConfigViewModel.java

@@ -1,29 +1,55 @@
 package com.zane.smapiinstaller.ui.config;
 
+import android.os.FileObserver;
 import android.view.View;
 
+import com.google.common.base.Predicate;
+import com.google.common.collect.Collections2;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Iterables;
+import com.google.common.collect.Lists;
 import com.zane.smapiinstaller.entity.ModManifestEntry;
 import com.zane.smapiinstaller.logic.ModAssetsManager;
 
+import java.io.File;
+import java.nio.file.Path;
+import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 
+import androidx.annotation.NonNull;
 import androidx.lifecycle.MutableLiveData;
 import androidx.lifecycle.ViewModel;
+import androidx.recyclerview.widget.RecyclerView;
 
 class ConfigViewModel extends ViewModel {
 
-    private MutableLiveData<List<ModManifestEntry>> modList;
+    @NonNull
+    private List<ModManifestEntry> modList;
 
-    public ConfigViewModel(View root) {
+    private RecyclerView view;
+
+    ConfigViewModel(View root) {
         ModAssetsManager manager = new ModAssetsManager(root);
-        this.modList = new MutableLiveData<>();
+        this.modList = manager.findAllInstalledMods();
-        List<ModManifestEntry> entryList = manager.findAllInstalledMods();
+        Collections.sort(this.modList, (a, b)-> a.getName().compareTo(b.getName()));
-        Collections.sort(entryList, (a, b)-> a.getName().compareTo(b.getName()));
-        this.modList.setValue(entryList);
     }
 
-    public MutableLiveData<List<ModManifestEntry>> getModList() {
+    @NonNull
+    public List<ModManifestEntry> getModList() {
         return modList;
     }
+
+    public List<Integer> removeAll(Predicate<ModManifestEntry> predicate) {
+        List<Integer> deletedId = new ArrayList<>();
+        for (int i = modList.size() - 1; i >=0 ; i--) {
+            if(predicate.apply(modList.get(i))) {
+                modList.remove(i);
+                deletedId.add(i);
+            }
+        }
+        return deletedId;
+    }
+
 }

app/src/main/java/com/zane/smapiinstaller/ui/config/ModManifestAdapter.java

@@ -7,11 +7,16 @@ import android.widget.Button;
 import android.widget.TextView;
 
 import com.afollestad.materialdialogs.DialogAction;
+import com.google.common.collect.Iterables;
 import com.zane.smapiinstaller.R;
 import com.zane.smapiinstaller.entity.ModManifestEntry;
 import com.zane.smapiinstaller.logic.CommonLogic;
 
+import org.apache.commons.lang3.StringUtils;
+import org.zeroturnaround.zip.commons.FileUtils;
+
 import java.io.File;
+import java.io.IOException;
 import java.util.List;
 
 import androidx.annotation.NonNull;
@@ -23,21 +28,22 @@ import butterknife.ButterKnife;
 import butterknife.OnClick;
 
 public class ModManifestAdapter extends RecyclerView.Adapter<ModManifestAdapter.ViewHolder> {
-    private List<ModManifestEntry> modList;
+    private ConfigViewModel model;
 
-    public ModManifestAdapter(List<ModManifestEntry> modList){
+    public ModManifestAdapter(ConfigViewModel model){
-        this.modList=modList;
+        this.model=model;
     }
+
     @NonNull
     @Override
     public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
-        View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.mod_list_item,null);
+        View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.mod_list_item,parent, false);
         return new ViewHolder(view);
     }
 
     @Override
     public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
-        ModManifestEntry mod = modList.get(position);
+        ModManifestEntry mod = model.getModList().get(position);
         holder.modName.setText(mod.getName());
         holder.modDescription.setText(mod.getDescription());
         holder.setModPath(mod.getAssetPath());
@@ -45,10 +51,10 @@ public class ModManifestAdapter extends RecyclerView.Adapter<ModManifestAdapter.
 
     @Override
     public int getItemCount() {
-        return modList.size();
+        return model.getModList().size();
     }
 
-    static class ViewHolder extends RecyclerView.ViewHolder{
+    class ViewHolder extends RecyclerView.ViewHolder{
         private String modPath;
         void setModPath(String modPath) {
             this.modPath = modPath;
@@ -75,7 +81,15 @@ public class ModManifestAdapter extends RecyclerView.Adapter<ModManifestAdapter.
                 if (which == DialogAction.POSITIVE) {
                     File file = new File(modPath);
                     if (file.exists()) {
-                        file.delete();
+                        try {
+                            FileUtils.forceDelete(file);
+                            List<Integer> removed = model.removeAll(entry -> StringUtils.equals(entry.getAssetPath(), modPath));
+                            for (int idx : removed) {
+                                notifyItemRemoved(idx);
+                            }
+                        } catch (IOException e) {
+                            CommonLogic.showAlertDialog(itemView, R.string.error, e.getMessage());
+                        }
                     }
                 }
             });

app/src/main/java/com/zane/smapiinstaller/ui/download/DownloadableContentAdapter.java

@@ -0,0 +1,69 @@
+package com.zane.smapiinstaller.ui.download;
+
+import androidx.recyclerview.widget.RecyclerView;
+import butterknife.BindView;
+import butterknife.ButterKnife;
+import butterknife.OnClick;
+
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import com.zane.smapiinstaller.R;
+import com.zane.smapiinstaller.entity.DownloadableContent;
+
+import java.util.List;
+
+/**
+ * {@link RecyclerView.Adapter} that can display a {@link DownloadableContent}
+ */
+public class DownloadableContentAdapter extends RecyclerView.Adapter<DownloadableContentAdapter.ViewHolder> {
+
+    private final List<DownloadableContent> downloadableContentList;
+
+    public DownloadableContentAdapter(List<DownloadableContent> items) {
+        downloadableContentList = items;
+    }
+
+    @Override
+    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+        View view = LayoutInflater.from(parent.getContext())
+                .inflate(R.layout.download_content_item, parent, false);
+        return new ViewHolder(view);
+    }
+
+    @Override
+    public void onBindViewHolder(final ViewHolder holder, int position) {
+        holder.downloadableContent = downloadableContentList.get(position);
+        holder.typeTextView.setText(holder.downloadableContent.getType());
+        holder.nameTextView.setText(holder.downloadableContent.getName());
+        holder.descriptionTextView.setText(holder.downloadableContent.getDescription());
+    }
+
+    @Override
+    public int getItemCount() {
+        return downloadableContentList.size();
+    }
+
+    public class ViewHolder extends RecyclerView.ViewHolder {
+        @BindView(R.id.text_item_type)
+        TextView typeTextView;
+        @BindView(R.id.text_item_name)
+        TextView nameTextView;
+        @BindView(R.id.text_item_description)
+        TextView descriptionTextView;
+        public DownloadableContent downloadableContent;
+
+        public ViewHolder(View view) {
+            super(view);
+            ButterKnife.bind(this, itemView);
+        }
+        @OnClick(R.id.button_remove_content) void removeContent() {
+
+        }
+        @OnClick(R.id.button_download_content) void downloadContent() {
+
+        }
+    }
+}

app/src/main/java/com/zane/smapiinstaller/ui/download/DownloadableContentFragment.java

@@ -0,0 +1,47 @@
+package com.zane.smapiinstaller.ui.download;
+
+import android.content.Context;
+import android.os.Bundle;
+
+import androidx.fragment.app.Fragment;
+import androidx.recyclerview.widget.DividerItemDecoration;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import com.zane.smapiinstaller.R;
+import com.zane.smapiinstaller.entity.DownloadableContentList;
+import com.zane.smapiinstaller.logic.CommonLogic;
+
+/**
+ * A fragment representing a list of Items.
+ */
+public class DownloadableContentFragment extends Fragment {
+
+    /**
+     * Mandatory empty constructor for the fragment manager to instantiate the
+     * fragment (e.g. upon screen orientation changes).
+     */
+    public DownloadableContentFragment() {
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                             Bundle savedInstanceState) {
+        View view = inflater.inflate(R.layout.fragment_download_content_list, container, false);
+
+        // Set the adapter
+        if (view instanceof RecyclerView) {
+            Context context = view.getContext();
+            RecyclerView recyclerView = (RecyclerView) view;
+            recyclerView.setLayoutManager(new LinearLayoutManager(context));
+            DownloadableContentList contentList = CommonLogic.getAssetJson(context, "downloadable_content_list.json", DownloadableContentList.class);
+            recyclerView.setAdapter(new DownloadableContentAdapter(contentList.getContents()));
+            recyclerView.addItemDecoration(new DividerItemDecoration(recyclerView.getContext(), DividerItemDecoration.VERTICAL));
+        }
+        return view;
+    }
+}

app/src/main/java/com/zane/smapiinstaller/ui/install/InstallFragment.java

@@ -13,6 +13,8 @@ import com.zane.smapiinstaller.logic.ApkPatcher;
 import com.zane.smapiinstaller.logic.CommonLogic;
 import com.zane.smapiinstaller.logic.ModAssetsManager;
 
+import org.apache.commons.lang3.StringUtils;
+
 import androidx.annotation.NonNull;
 import androidx.fragment.app.Fragment;
 import butterknife.ButterKnife;
@@ -52,12 +54,12 @@ public class InstallFragment extends Fragment {
                     CommonLogic.setProgressDialogState(root, dialog, R.string.extracting_package, 0);
                     String path = patcher.extract();
                     if (path == null) {
-                        CommonLogic.showAlertDialog(root, R.string.error, R.string.error_game_not_found);
+                        CommonLogic.showAlertDialog(root, R.string.error, StringUtils.firstNonBlank(patcher.getErrorMessage().get(), context.getString(R.string.error_game_not_found)));
                         return;
                     }
                     CommonLogic.setProgressDialogState(root, dialog, R.string.unpacking_smapi_files, 10);
                     if (!CommonLogic.unpackSmapiFiles(context, path, false)) {
-                        CommonLogic.showAlertDialog(root, R.string.error, R.string.failed_to_unpack_smapi_files);
+                        CommonLogic.showAlertDialog(root, R.string.error, StringUtils.firstNonBlank(patcher.getErrorMessage().get(), context.getString(R.string.failed_to_unpack_smapi_files)));
                         return;
                     }
                     ModAssetsManager modAssetsManager = new ModAssetsManager(root);
@@ -65,13 +67,13 @@ public class InstallFragment extends Fragment {
                     modAssetsManager.installDefaultMods();
                     CommonLogic.setProgressDialogState(root, dialog, R.string.patching_package, 25);
                     if (!patcher.patch(path)) {
-                        CommonLogic.showAlertDialog(root, R.string.error, R.string.failed_to_patch_game);
+                        CommonLogic.showAlertDialog(root, R.string.error, StringUtils.firstNonBlank(patcher.getErrorMessage().get(), context.getString(R.string.failed_to_patch_game)));
                         return;
                     }
                     CommonLogic.setProgressDialogState(root, dialog, R.string.signing_package, 55);
                     String signPath = patcher.sign(path);
                     if (signPath == null) {
-                        CommonLogic.showAlertDialog(root, R.string.error, R.string.failed_to_sign_game);
+                        CommonLogic.showAlertDialog(root, R.string.error, StringUtils.firstNonBlank(patcher.getErrorMessage().get(), context.getString(R.string.failed_to_sign_game)));
                         return;
                     }
                     CommonLogic.setProgressDialogState(root, dialog, R.string.installing_package, 99);

app/src/main/res/drawable/vertical_divider.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android">
+    <solid android:color="#eee"/>
+    <size android:width="1dp"/>
+</shape>

app/src/main/res/layout/download_content_item.xml

@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content">
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_alignParentStart="true"
+        android:layout_marginEnd="40dp"
+        android:divider="@drawable/horizontal_divider"
+        android:showDividers="middle"
+        android:orientation="vertical">
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:divider="@drawable/vertical_divider"
+            android:showDividers="middle"
+            android:orientation="horizontal">
+            <TextView
+                android:id="@+id/text_item_type"
+                android:textSize="20sp"
+                android:paddingRight="5dp"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"/>
+
+            <TextView
+                android:id="@+id/text_item_name"
+                android:textSize="20sp"
+                android:paddingLeft="5dp"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"/>
+        </LinearLayout>
+
+        <TextView
+            android:id="@+id/text_item_description"
+            android:textSize="16sp"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"/>
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignParentEnd="true"
+        android:orientation="vertical">
+        <Button
+            android:id="@+id/button_remove_content"
+            android:layout_width="32dp"
+            android:layout_height="32dp"
+            android:background="@android:drawable/ic_menu_delete" />
+        <Button
+            android:id="@+id/button_download_content"
+            android:layout_width="32dp"
+            android:layout_height="32dp"
+            android:background="@android:drawable/ic_menu_add" />
+    </LinearLayout>
+</RelativeLayout>

app/src/main/res/layout/fragment_download_content_list.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.recyclerview.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/list"
+    android:name="com.zane.smapiinstaller.ui.download.DownloadContentFragment"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:layout_marginLeft="16dp"
+    android:layout_marginRight="16dp"
+    app:layoutManager="LinearLayoutManager"
+    tools:context=".ui.download.DownloadableContentFragment"
+    tools:listitem="@layout/download_content_item" />

app/src/main/res/layout/mod_list_item.xml

@@ -3,13 +3,13 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="wrap_content">
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_alignParentStart="true"
-        android:layout_marginEnd="80dp"
+        android:layout_marginEnd="40dp"
-        android:divider="@drawable/divider"
+        android:divider="@drawable/horizontal_divider"
         android:showDividers="middle"
         android:orientation="vertical">
         <TextView
@@ -30,7 +30,8 @@
     <LinearLayout
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_alignParentEnd="true">
+        android:layout_alignParentEnd="true"
+        android:orientation="vertical">
         <Button
             android:id="@+id/button_remove_mod"
             android:layout_width="32dp"

app/src/main/res/menu/activity_main_drawer.xml

@@ -12,6 +12,10 @@
             android:id="@+id/nav_config"
             android:icon="@android:drawable/ic_menu_edit"
             android:title="@string/menu_config" />
+        <item
+            android:id="@+id/nav_download"
+            android:icon="@android:drawable/ic_dialog_dialer"
+            android:title="@string/menu_download" />
         <item
             android:id="@+id/nav_help"
             android:icon="@android:drawable/ic_menu_help"

app/src/main/res/navigation/mobile_navigation.xml

@@ -39,4 +39,9 @@
             <argument android:name="editable" android:defaultValue="true" app:argType="boolean"/>
         </action>
     </fragment>
+    <fragment
+        android:id="@+id/nav_download"
+        android:name="com.zane.smapiinstaller.ui.download.DownloadableContentFragment"
+        android:label="@string/menu_download"
+        tools:layout="@layout/fragment_download_content_list" />
 </navigation>

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

@@ -40,4 +40,8 @@
     <string name="test_message">暂处于内测阶段, Q群：860453392</string>
     <string name="button_logs">日志</string>
     <string name="smapi_game_name">SMAPI星露谷物语</string>
+    <string name="error_failed_to_create_file">无法创建以下文件: %s</string>
+    <string name="failed_to_process_manifest">无法处理AndroidManifest.xml文件</string>
+    <string name="error_no_supported_game_version">游戏版本不支持，请更新版本或者下载兼容包</string>
+    <string name="menu_download">下载</string>
 </resources>

app/src/main/res/values/dimens.xml

@@ -5,4 +5,5 @@
     <dimen name="nav_header_vertical_spacing">8dp</dimen>
     <dimen name="nav_header_height">176dp</dimen>
     <dimen name="fab_margin">16dp</dimen>
+    <dimen name="text_margin">16dp</dimen>
 </resources>

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

@@ -40,4 +40,8 @@
     <string name="test_message">Still at test stage now, not release yet.</string>
     <string name="button_logs">Logs</string>
     <string name="smapi_game_name">SMAPI Stardew Valley</string>
+    <string name="error_failed_to_create_file">Failed to create target file : %s</string>
+    <string name="failed_to_process_manifest">Failed to process AndroidManifest.xml file</string>
+    <string name="error_no_supported_game_version">Game version not supported, upgrade or download compat package first</string>
+    <string name="menu_download">Download</string>
 </resources>