feat(gui): support project (#526) (PR #543)

jadx-cli/src/main/java/jadx/cli/JadxCLIArgs.java

@@ -231,10 +231,6 @@ public class JadxCLIArgs {
 		return deobfuscationUseSourceNameAsAlias;
 	}
 
-	public boolean escapeUnicode() {
-		return escapeUnicode;
-	}
-
 	public boolean isEscapeUnicode() {
 		return escapeUnicode;
 	}

jadx-gui/src/main/java/jadx/gui/JadxGUI.java

@@ -26,7 +26,7 @@ public class JadxGUI {
 				UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
 			}
 			NLS.setLocale(settings.getLangLocale());
-			SwingUtilities.invokeLater(new MainWindow(settings)::open);
+			SwingUtilities.invokeLater(new MainWindow(settings)::init);
 		} catch (Exception e) {
 			LOG.error("Error: {}", e.getMessage(), e);
 			System.exit(1);

jadx-gui/src/main/java/jadx/gui/JadxWrapper.java

@@ -47,27 +47,24 @@ public class JadxWrapper {
 	}
 
 	public void saveAll(final File dir, final ProgressMonitor progressMonitor) {
-		Runnable save = new Runnable() {
-			@Override
-			public void run() {
-				try {
-					decompiler.getArgs().setRootDir(dir);
-					ThreadPoolExecutor ex = (ThreadPoolExecutor) decompiler.getSaveExecutor();
-					ex.shutdown();
-					while (ex.isTerminating()) {
-						long total = ex.getTaskCount();
-						long done = ex.getCompletedTaskCount();
-						progressMonitor.setProgress((int) (done * 100.0 / total));
-						Thread.sleep(500);
-					}
-					progressMonitor.close();
-					LOG.info("decompilation complete, freeing memory ...");
-					decompiler.getClasses().forEach(JavaClass::unload);
-					LOG.info("done");
-				} catch (InterruptedException e) {
-					LOG.error("Save interrupted", e);
-					Thread.currentThread().interrupt();
+		Runnable save = () -> {
+			try {
+				decompiler.getArgs().setRootDir(dir);
+				ThreadPoolExecutor ex = (ThreadPoolExecutor) decompiler.getSaveExecutor();
+				ex.shutdown();
+				while (ex.isTerminating()) {
+					long total = ex.getTaskCount();
+					long done = ex.getCompletedTaskCount();
+					progressMonitor.setProgress((int) (done * 100.0 / total));
+					Thread.sleep(500);
 				}
+				progressMonitor.close();
+				LOG.info("decompilation complete, freeing memory ...");
+				decompiler.getClasses().forEach(JavaClass::unload);
+				LOG.info("done");
+			} catch (InterruptedException e) {
+				LOG.error("Save interrupted", e);
+				Thread.currentThread().interrupt();
 			}
 		};
 		new Thread(save).start();

jadx-gui/src/main/java/jadx/gui/jobs/BackgroundWorker.java

@@ -58,8 +58,7 @@ public class BackgroundWorker extends SwingWorker<Void, Void> {
 			if (searchIndex != null && searchIndex.getSkippedCount() > 0) {
 				LOG.warn("Indexing of some classes skipped, count: {}, low memory: {}",
 						searchIndex.getSkippedCount(), Utils.memoryInfo());
-				String msg = NLS.str("message.indexingClassesSkipped");
-				msg = String.format(msg, searchIndex.getSkippedCount());
+				String msg = NLS.str("message.indexingClassesSkipped", searchIndex.getSkippedCount());
 				JOptionPane.showMessageDialog(null, msg);
 			}
 		} catch (Exception e) {

jadx-gui/src/main/java/jadx/gui/settings/JadxProject.java

+package jadx.gui.settings;
+
+import java.io.BufferedWriter;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Arrays;
+import java.util.List;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+
+import jadx.gui.utils.PathTypeAdapter;
+
+public class JadxProject {
+
+	private static final Logger LOG = LoggerFactory.getLogger(JadxProject.class);
+	private static final int CURRENT_SETTINGS_VERSION = 0;
+
+	public static final String PROJECT_EXTENSION = "jadx";
+
+	private static final Gson GSON = new GsonBuilder()
+			.registerTypeHierarchyAdapter(Path.class, PathTypeAdapter.singleton())
+			.create();
+
+	private transient JadxSettings settings;
+	private transient String name = "New Project";
+	private transient Path projectPath;
+	private List<Path> filesPath;
+	private transient boolean saved;
+	private transient boolean initial = true;
+
+	private int projectVersion = 0;
+
+	public JadxProject(JadxSettings settings) {
+		this.settings = settings;
+	}
+
+	public Path getProjectPath() {
+		return projectPath;
+	}
+
+	private void setProjectPath(Path projectPath) {
+		this.projectPath = projectPath;
+		if (projectVersion != CURRENT_SETTINGS_VERSION) {
+			upgradeSettings(projectVersion);
+		}
+		name = projectPath.getFileName().toString();
+		name = name.substring(0, name.lastIndexOf('.'));
+		changed();
+	}
+
+	public Path getFilePath() {
+		return filesPath == null ? null : filesPath.get(0);
+	}
+
+	public void setFilePath(Path filePath) {
+		if (!filePath.equals(getFilePath())) {
+			this.filesPath = Arrays.asList(filePath);
+			changed();
+		}
+	}
+
+	private void changed() {
+		if (settings.isAutoSaveProject()) {
+			save();
+		}
+		else {
+			saved = false;
+		}
+		initial = false;
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public boolean isSaved() {
+		return saved;
+	}
+
+	public boolean isInitial() {
+		return initial;
+	}
+
+	public void saveAs(Path path) {
+		setProjectPath(path);
+		save();
+	}
+
+	public void save() {
+		try (BufferedWriter writer = Files.newBufferedWriter(getProjectPath())) {
+			writer.write(GSON.toJson(this));
+			saved = true;
+		} catch (Exception e) {
+			LOG.error("Error saving project", e);
+		}
+	}
+
+	public static JadxProject from(Path path, JadxSettings settings) {
+		try {
+			List<String> lines = Files.readAllLines(path);
+
+			if (!lines.isEmpty()) {
+				JadxProject project = GSON.fromJson(lines.get(0), JadxProject.class);
+				project.settings = settings;
+				project.setProjectPath(path);
+				project.saved = true;
+				return project;
+			}
+		} catch (Exception e) {
+			LOG.error("Error loading project", e);
+		}
+		return null;
+	}
+
+	private void upgradeSettings(int fromVersion) {
+		LOG.debug("upgrade settings from version: {} to {}", fromVersion, CURRENT_SETTINGS_VERSION);
+		if (fromVersion == 0) {
+			fromVersion++;
+		}
+		projectVersion = CURRENT_SETTINGS_VERSION;
+		save();
+	}
+}

jadx-gui/src/main/java/jadx/gui/settings/JadxSettings.java

@@ -4,6 +4,8 @@ import java.awt.Font;
 import java.awt.GraphicsDevice;
 import java.awt.GraphicsEnvironment;
 import java.awt.Window;
+import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashMap;
@@ -27,25 +29,27 @@ import jadx.gui.utils.Utils;
 public class JadxSettings extends JadxCLIArgs {
 	private static final Logger LOG = LoggerFactory.getLogger(JadxSettings.class);
 
-	private static final String USER_HOME = System.getProperty("user.home");
-	private static final int RECENT_FILES_COUNT = 15;
-	private static final int CURRENT_SETTINGS_VERSION = 8;
+	private static final Path USER_HOME = Paths.get(System.getProperty("user.home"));
+	private static final int RECENT_PROJECTS_COUNT = 15;
+	private static final int CURRENT_SETTINGS_VERSION = 9;
 
 	private static final Font DEFAULT_FONT = new RSyntaxTextArea().getFont();
 
 	static final Set<String> SKIP_FIELDS = new HashSet<>(Arrays.asList(
 			"files", "input", "outDir", "outDirSrc", "outDirRes", "verbose", "printVersion", "printHelp"
 	));
-	private String lastOpenFilePath = USER_HOME;
-	private String lastSaveFilePath = USER_HOME;
+	private Path lastSaveProjectPath = USER_HOME;
+	private Path lastOpenFilePath = USER_HOME;
+	private Path lastSaveFilePath = USER_HOME;
 	private boolean flattenPackage = false;
 	private boolean checkForUpdates = false;
-	private List<String> recentFiles = new ArrayList<>();
+	private List<Path> recentProjects = new ArrayList<>();
 	private String fontStr = "";
 	private String editorThemePath = "";
 	private LangLocale langLocale = NLS.defaultLocale();
 	private boolean autoStartJobs = false;
 	protected String excludedPackages = "";
+	private boolean autoSaveProject = false;
 
 	private boolean showHeapUsageBar = true;
 
@@ -84,20 +88,29 @@ public class JadxSettings extends JadxCLIArgs {
 		}
 	}
 
-	public String getLastOpenFilePath() {
+	public Path getLastOpenFilePath() {
 		return lastOpenFilePath;
 	}
 
-	public void setLastOpenFilePath(String lastOpenFilePath) {
+	public void setLastOpenFilePath(Path lastOpenFilePath) {
 		this.lastOpenFilePath = lastOpenFilePath;
 		partialSync(settings -> settings.lastOpenFilePath = JadxSettings.this.lastOpenFilePath);
 	}
 
-	public String getLastSaveFilePath() {
+	public Path getLastSaveProjectPath() {
+		return lastSaveProjectPath;
+	}
+
+	public Path getLastSaveFilePath() {
 		return lastSaveFilePath;
 	}
 
-	public void setLastSaveFilePath(String lastSaveFilePath) {
+	public void setLastSaveProjectPath(Path lastSaveProjectPath) {
+		this.lastSaveProjectPath = lastSaveProjectPath;
+		partialSync(settings -> settings.lastSaveProjectPath = JadxSettings.this.lastSaveProjectPath);
+	}
+
+	public void setLastSaveFilePath(Path lastSaveFilePath) {
 		this.lastSaveFilePath = lastSaveFilePath;
 		partialSync(settings -> settings.lastSaveFilePath = JadxSettings.this.lastSaveFilePath);
 	}
@@ -120,18 +133,18 @@ public class JadxSettings extends JadxCLIArgs {
 		sync();
 	}
 
-	public Iterable<String> getRecentFiles() {
-		return recentFiles;
+	public Iterable<Path> getRecentProjects() {
+		return recentProjects;
 	}
 
-	public void addRecentFile(String filePath) {
-		recentFiles.remove(filePath);
-		recentFiles.add(0, filePath);
-		int count = recentFiles.size();
-		if (count > RECENT_FILES_COUNT) {
-			recentFiles.subList(RECENT_FILES_COUNT, count).clear();
+	public void addRecentProject(Path projectPath) {
+		recentProjects.remove(projectPath);
+		recentProjects.add(0, projectPath);
+		int count = recentProjects.size();
+		if (count > RECENT_PROJECTS_COUNT) {
+			recentProjects.subList(RECENT_PROJECTS_COUNT, count).clear();
 		}
-		partialSync(settings -> settings.recentFiles = recentFiles);
+		partialSync(settings -> settings.recentProjects = recentProjects);
 	}
 
 	public void saveWindowPos(Window window) {
@@ -265,6 +278,14 @@ public class JadxSettings extends JadxCLIArgs {
 		this.autoStartJobs = autoStartJobs;
 	}
 
+	public boolean isAutoSaveProject() {
+		return autoSaveProject;
+	}
+
+	public void setAutoSaveProject(boolean autoSaveProject) {
+		this.autoSaveProject = autoSaveProject;
+	}
+
 	public void setExportAsGradleProject(boolean exportAsGradleProject) {
 		this.exportAsGradleProject = exportAsGradleProject;
 	}
@@ -343,6 +364,10 @@ public class JadxSettings extends JadxCLIArgs {
 			outDir = null;
 			outDirSrc = null;
 			outDirRes = null;
+			fromVersion++;
+		}
+		if (fromVersion == 8) {
+			fromVersion++;
 		}
 		settingsVersion = CURRENT_SETTINGS_VERSION;
 		sync();

jadx-gui/src/main/java/jadx/gui/settings/JadxSettingsAdapter.java

 package jadx.gui.settings;
 
 import java.lang.reflect.Modifier;
+import java.nio.file.Path;
 import java.util.prefs.Preferences;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import com.google.gson.ExclusionStrategy;
 import com.google.gson.FieldAttributes;
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
 import com.google.gson.InstanceCreator;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import jadx.gui.JadxGUI;
+import jadx.gui.utils.PathTypeAdapter;
 
 public class JadxSettingsAdapter {
 
@@ -34,7 +37,10 @@ public class JadxSettingsAdapter {
 			return false;
 		}
 	};
-	private static final GsonBuilder GSON_BUILDER = new GsonBuilder().setExclusionStrategies(EXCLUDE_FIELDS);
+	private static final GsonBuilder GSON_BUILDER = new GsonBuilder()
+			.setExclusionStrategies(EXCLUDE_FIELDS)
+			.registerTypeHierarchyAdapter(Path.class, PathTypeAdapter.singleton())
+			;
 	private static final Gson GSON = GSON_BUILDER.create();
 
 	private JadxSettingsAdapter() {

jadx-gui/src/main/java/jadx/gui/settings/JadxSettingsWindow.java

@@ -52,6 +52,7 @@ public class JadxSettingsWindow extends JDialog {
 		panel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
 		panel.add(makeDeobfuscationGroup());
 		panel.add(makeDecompilationGroup());
+		panel.add(makeProjectGroup());
 		panel.add(makeEditorGroup());
 		panel.add(makeOtherGroup());
 
@@ -168,6 +169,18 @@ public class JadxSettingsWindow extends JDialog {
 		connectedComponents.forEach(comp -> comp.setEnabled(enabled));
 	}
 
+	private SettingsGroup makeProjectGroup() {
+		JCheckBox autoSave = new JCheckBox();
+		autoSave.setSelected(settings.isAutoSaveProject());
+		autoSave.addItemListener(e ->
+			settings.setAutoSaveProject(e.getStateChange() == ItemEvent.SELECTED));
+
+		SettingsGroup group = new SettingsGroup(NLS.str("preferences.project"));
+		group.addRow(NLS.str("preferences.autoSave"), autoSave);
+
+		return group;
+	}
+
 	private SettingsGroup makeEditorGroup() {
 		JButton fontBtn = new JButton(NLS.str("preferences.select_font"));
 
@@ -186,9 +199,9 @@ public class JadxSettingsWindow extends JDialog {
 			mainWindow.loadSettings();
 		});
 
-		SettingsGroup other = new SettingsGroup(NLS.str("preferences.editor"));
-		JLabel fontLabel = other.addRow(getFontLabelStr(), fontBtn);
-		other.addRow(NLS.str("preferences.theme"), themesCbx);
+		SettingsGroup group = new SettingsGroup(NLS.str("preferences.editor"));
+		JLabel fontLabel = group.addRow(getFontLabelStr(), fontBtn);
+		group.addRow(NLS.str("preferences.theme"), themesCbx);
 
 		fontBtn.addMouseListener(new MouseAdapter() {
 			@Override
@@ -205,7 +218,7 @@ public class JadxSettingsWindow extends JDialog {
 				}
 			}
 		});
-		return other;
+		return group;
 	}
 
 	private String getFontLabelStr() {
@@ -263,7 +276,7 @@ public class JadxSettingsWindow extends JDialog {
 		autoStartJobs.addItemListener(e -> settings.setAutoStartJobs(e.getStateChange() == ItemEvent.SELECTED));
 
 		JCheckBox escapeUnicode = new JCheckBox();
-		escapeUnicode.setSelected(settings.escapeUnicode());
+		escapeUnicode.setSelected(settings.isEscapeUnicode());
 		escapeUnicode.addItemListener(e -> {
 			settings.setEscapeUnicode(e.getStateChange() == ItemEvent.SELECTED);
 			needReload();
@@ -333,12 +346,12 @@ public class JadxSettingsWindow extends JDialog {
 			needReload();
 		});
 
-		SettingsGroup other = new SettingsGroup(NLS.str("preferences.other"));
-		other.addRow(NLS.str("preferences.language"), languageCbx);
-		other.addRow(NLS.str("preferences.check_for_updates"), update);
-		other.addRow(NLS.str("preferences.cfg"), cfg);
-		other.addRow(NLS.str("preferences.raw_cfg"), rawCfg);
-		return other;
+		SettingsGroup group = new SettingsGroup(NLS.str("preferences.other"));
+		group.addRow(NLS.str("preferences.language"), languageCbx);
+		group.addRow(NLS.str("preferences.check_for_updates"), update);
+		group.addRow(NLS.str("preferences.cfg"), cfg);
+		group.addRow(NLS.str("preferences.raw_cfg"), rawCfg);
+		return group;
 	}
 
 	private void needReload() {

jadx-gui/src/main/java/jadx/gui/treemodel/ApkSignature.java

@@ -77,15 +77,15 @@ public class ApkSignature extends JNode {
 
 			final String err = NLS.str("apkSignature.errors");
 			final String warn = NLS.str("apkSignature.warnings");
-			final String sigSucc = NLS.str("apkSignature.signatureSuccess");
-			final String sigFail = NLS.str("apkSignature.signatureFailed");
+			final String sigSuccKey = "apkSignature.signatureSuccess";
+			final String sigFailKey = "apkSignature.signatureFailed";
 
 			writeIssues(builder, err, result.getErrors());
 			writeIssues(builder, warn, result.getWarnings());
 
 			if (!result.getV1SchemeSigners().isEmpty()) {
 				builder.append("<h2>");
-				builder.escape(String.format(result.isVerifiedUsingV1Scheme() ? sigSucc : sigFail, 1));
+				builder.escape(NLS.str(result.isVerifiedUsingV1Scheme() ? sigSuccKey : sigFailKey, 1));
 				builder.append("</h2>\n");
 
 				builder.append("<blockquote>");
@@ -106,7 +106,7 @@ public class ApkSignature extends JNode {
 			}
 			if (!result.getV2SchemeSigners().isEmpty()) {
 				builder.append("<h2>");
-				builder.escape(String.format(result.isVerifiedUsingV2Scheme() ? sigSucc : sigFail, 2));
+				builder.escape(NLS.str(result.isVerifiedUsingV2Scheme() ? sigSuccKey : sigFailKey, 2));
 				builder.append("</h2>\n");
 
 				builder.append("<blockquote>");

jadx-gui/src/main/java/jadx/gui/ui/CommonSearchDialog.java

@@ -232,11 +232,10 @@ public abstract class CommonSearchDialog extends JDialog {
 	}
 
 	protected void updateProgressLabel() {
-		String statusText = String.format(
-				NLS.str("search_dialog.info_label"),
-				resultsModel.getDisplayedResultsStart(),
-				resultsModel.getDisplayedResultsEnd(),
-				resultsModel.getResultCount()
+		String statusText = NLS.str("search_dialog.info_label",
+			resultsModel.getDisplayedResultsStart(),
+			resultsModel.getDisplayedResultsEnd(),
+			resultsModel.getResultCount()
 		);
 		resultsInfoLabel.setText(statusText);
 	}

jadx-gui/src/main/java/jadx/gui/ui/HeapUsageBar.java

@@ -25,11 +25,9 @@ public class HeapUsageBar extends JProgressBar implements ActionListener {
 	private final transient Runtime runtime = Runtime.getRuntime();
 	private final transient Timer timer;
 
-	private final String textFormat;
 	private final double maxGB;
 
 	public HeapUsageBar() {
-		this.textFormat = NLS.str("heapUsage.text");
 		setBorderPainted(false);
 		setStringPainted(true);
 		setValue(10);
@@ -54,7 +52,7 @@ public class HeapUsageBar extends JProgressBar implements ActionListener {
 		long used = runtime.totalMemory() - runtime.freeMemory();
 		int usedKB = (int) (used / 1024);
 		setValue(usedKB);
-		setString(String.format(textFormat, (usedKB / TWO_TO_20), maxGB));
+		setString(NLS.str("heapUsage.text", (usedKB / TWO_TO_20), maxGB));
 
 		if ((used + Utils.MIN_FREE_MEMORY) > runtime.maxMemory()) {
 			setForeground(RED);

jadx-gui/src/main/java/jadx/gui/ui/MainDropTarget.java

@@ -62,7 +62,7 @@ public class MainDropTarget implements DropTargetListener {
 			if (!transferData.isEmpty()) {
 				dtde.dropComplete(true);
 				// load first file
-				mainWindow.openFile(transferData.get(0));
+				mainWindow.open(transferData.get(0).toPath());
 			}
 		} catch (Exception e) {
 			LOG.error("File drop operation failed", e);

jadx-gui/src/main/java/jadx/gui/ui/MainWindow.java

 package jadx.gui.ui;
 
-import javax.swing.*;
-import javax.swing.event.MenuEvent;
-import javax.swing.event.MenuListener;
-import javax.swing.event.TreeExpansionEvent;
-import javax.swing.event.TreeWillExpandListener;
-import javax.swing.filechooser.FileNameExtensionFilter;
-import javax.swing.tree.DefaultMutableTreeNode;
-import javax.swing.tree.DefaultTreeCellRenderer;
-import javax.swing.tree.DefaultTreeModel;
-import javax.swing.tree.TreeNode;
-import javax.swing.tree.TreePath;
-import javax.swing.tree.TreeSelectionModel;
-import java.awt.*;
+import static javax.swing.KeyStroke.getKeyStroke;
+
+import java.awt.BorderLayout;
+import java.awt.Component;
+import java.awt.DisplayMode;
+import java.awt.Font;
+import java.awt.GraphicsDevice;
+import java.awt.GraphicsEnvironment;
 import java.awt.dnd.DnDConstants;
 import java.awt.dnd.DropTarget;
 import java.awt.event.ActionEvent;
@@ -21,12 +16,51 @@ import java.awt.event.KeyAdapter;
 import java.awt.event.KeyEvent;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
 import java.io.File;
 import java.io.FileInputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.Arrays;
+import java.util.Locale;
 import java.util.Timer;
 import java.util.TimerTask;
 
+import javax.swing.AbstractAction;
+import javax.swing.Action;
+import javax.swing.Box;
+import javax.swing.ImageIcon;
+import javax.swing.JCheckBoxMenuItem;
+import javax.swing.JFileChooser;
+import javax.swing.JFrame;
+import javax.swing.JMenu;
+import javax.swing.JMenuBar;
+import javax.swing.JMenuItem;
+import javax.swing.JOptionPane;
+import javax.swing.JPanel;
+import javax.swing.JPopupMenu;
+import javax.swing.JScrollPane;
+import javax.swing.JSplitPane;
+import javax.swing.JToggleButton;
+import javax.swing.JToolBar;
+import javax.swing.JTree;
+import javax.swing.ProgressMonitor;
+import javax.swing.SwingUtilities;
+import javax.swing.WindowConstants;
+import javax.swing.event.MenuEvent;
+import javax.swing.event.MenuListener;
+import javax.swing.event.TreeExpansionEvent;
+import javax.swing.event.TreeWillExpandListener;
+import javax.swing.filechooser.FileNameExtensionFilter;
+import javax.swing.tree.DefaultMutableTreeNode;
+import javax.swing.tree.DefaultTreeCellRenderer;
+import javax.swing.tree.DefaultTreeModel;
+import javax.swing.tree.TreeNode;
+import javax.swing.tree.TreePath;
+import javax.swing.tree.TreeSelectionModel;
+
 import org.fife.ui.rsyntaxtextarea.Theme;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -37,6 +71,7 @@ import jadx.gui.JadxWrapper;
 import jadx.gui.jobs.BackgroundWorker;
 import jadx.gui.jobs.DecompileJob;
 import jadx.gui.jobs.IndexJob;
+import jadx.gui.settings.JadxProject;
 import jadx.gui.settings.JadxSettings;
 import jadx.gui.settings.JadxSettingsWindow;
 import jadx.gui.treemodel.ApkSignature;
@@ -56,8 +91,6 @@ import jadx.gui.utils.Link;
 import jadx.gui.utils.NLS;
 import jadx.gui.utils.Utils;
 
-import static javax.swing.KeyStroke.getKeyStroke;
-
 @SuppressWarnings("serial")
 public class MainWindow extends JFrame {
 	private static final Logger LOG = LoggerFactory.getLogger(MainWindow.class);
@@ -86,6 +119,9 @@ public class MainWindow extends JFrame {
 	private final transient JadxWrapper wrapper;
 	private final transient JadxSettings settings;
 	private final transient CacheObject cacheObject;
+	private transient JadxProject project;
+	private transient Action newProjectAction;
+	private transient Action saveProjectAction;
 
 	private JPanel mainPanel;
 
@@ -119,20 +155,26 @@ public class MainWindow extends JFrame {
 		Utils.setWindowIcons(this);
 		loadSettings();
 		checkForUpdate();
+		newProject();
 	}
 
-	public void open() {
+	public void init() {
 		pack();
 		setLocationAndPosition();
 		heapUsageBar.setVisible(settings.isShowHeapUsageBar());
 		setVisible(true);
 		setLocationRelativeTo(null);
-		setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
+		setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);
+		addWindowListener(new WindowAdapter() {
+			public void windowClosing(WindowEvent e) {
+				closeWindow();
+			}
+		});
 
 		if (settings.getFiles().isEmpty()) {
-			openFile();
+			openFileOrProject();
 		} else {
-			openFile(new File(settings.getFiles().get(0)));
+			open(Paths.get(settings.getFiles().get(0)));
 		}
 	}
 
@@ -146,7 +188,7 @@ public class MainWindow extends JFrame {
 				SwingUtilities.invokeLater(new Runnable() {
 					@Override
 					public void run() {
-						updateLink.setText(String.format(NLS.str("menu.update_label"), r.getName()));
+						updateLink.setText(NLS.str("menu.update_label", r.getName()));
 						updateLink.setVisible(true);
 					}
 				});
@@ -154,33 +196,160 @@ public class MainWindow extends JFrame {
 		});
 	}
 
-	public void openFile() {
+	public void openFileOrProject() {
 		JFileChooser fileChooser = new JFileChooser();
 		fileChooser.setAcceptAllFileFilterUsed(true);
-		String[] exts = {"apk", "dex", "jar", "class", "zip", "aar", "arsc"};
+		String[] exts = {JadxProject.PROJECT_EXTENSION, "apk", "dex", "jar", "class", "zip", "aar", "arsc"};
 		String description = "supported files: " + Arrays.toString(exts).replace('[', '(').replace(']', ')');
 		fileChooser.setFileFilter(new FileNameExtensionFilter(description, exts));
 		fileChooser.setToolTipText(NLS.str("file.open_action"));
-		String currentDirectory = settings.getLastOpenFilePath();
-		if (!currentDirectory.isEmpty()) {
-			fileChooser.setCurrentDirectory(new File(currentDirectory));
+		Path currentDirectory = settings.getLastOpenFilePath();
+		if (currentDirectory != null) {
+			fileChooser.setCurrentDirectory(currentDirectory.toFile());
 		}
 		int ret = fileChooser.showDialog(mainPanel, NLS.str("file.open_title"));
 		if (ret == JFileChooser.APPROVE_OPTION) {
-			settings.setLastOpenFilePath(fileChooser.getCurrentDirectory().getPath());
-			openFile(fileChooser.getSelectedFile());
+			settings.setLastOpenFilePath(fileChooser.getCurrentDirectory().toPath());
+			open(fileChooser.getSelectedFile().toPath());
+		}
+	}
+
+	private void newProject() {
+		if (!ensureProjectIsSaved()) {
+			return;
 		}
+		project = new JadxProject(settings);
+		update();
+		clearTree();
 	}
 
-	public void openFile(File file) {
+	private void clearTree() {
 		tabbedPane.closeAllTabs();
 		resetCache();
-		wrapper.openFile(file);
-		deobfToggleBtn.setSelected(settings.isDeobfuscationOn());
-		settings.addRecentFile(file.getAbsolutePath());
-		initTree();
-		setTitle(DEFAULT_TITLE + " - " + file.getName());
-		runBackgroundJobs();
+		treeRoot = null;
+		treeModel.setRoot(treeRoot);
+		treeModel.reload();
+	}
+
+	private void saveProject() {
+		if (project.getProjectPath() == null) {
+			saveProjectAs();
+		}
+		else {
+			project.save();
+			update();
+		}
+	}
+
+	private void saveProjectAs() {
+		JFileChooser fileChooser = new JFileChooser();
+		fileChooser.setAcceptAllFileFilterUsed(true);
+		String[] exts = {JadxProject.PROJECT_EXTENSION};
+		String description = "supported files: " + Arrays.toString(exts).replace('[', '(').replace(']', ')');
+		fileChooser.setFileFilter(new FileNameExtensionFilter(description, exts));
+		fileChooser.setToolTipText(NLS.str("file.save_project"));
+		Path currentDirectory = settings.getLastSaveProjectPath();
+		if (currentDirectory != null) {
+			fileChooser.setCurrentDirectory(currentDirectory.toFile());
+		}
+		int ret = fileChooser.showSaveDialog(mainPanel);
+		if (ret == JFileChooser.APPROVE_OPTION) {
+			settings.setLastSaveProjectPath(fileChooser.getCurrentDirectory().toPath());
+
+			Path path = fileChooser.getSelectedFile().toPath();
+			if (!path.getFileName().toString().toLowerCase(Locale.ROOT).endsWith(JadxProject.PROJECT_EXTENSION)) {
+				path = path.resolveSibling(path.getFileName() + "." + JadxProject.PROJECT_EXTENSION);
+			}
+
+			if (Files.exists(path)) {
+				int res = JOptionPane.showConfirmDialog(
+						this,
+						NLS.str("confirm.save_as_message", path.getFileName()),
+						NLS.str("confirm.save_as_title"),
+						JOptionPane.YES_NO_OPTION);
+				if (res == JOptionPane.NO_OPTION) {
+					return;
+				}
+			}
+			project.saveAs(path);
+			update();
+		}
+	}
+
+	void open(Path path) {
+		if (path.getFileName().toString().toLowerCase(Locale.ROOT)
+				.endsWith(JadxProject.PROJECT_EXTENSION)) {
+			openProject(path);
+		}
+		else {
+			project.setFilePath(path);
+			tabbedPane.closeAllTabs();
+			resetCache();
+			wrapper.openFile(path.toFile());
+			deobfToggleBtn.setSelected(settings.isDeobfuscationOn());
+			initTree();
+			update();
+			runBackgroundJobs();
+		}
+	}
+
+	private boolean ensureProjectIsSaved() {
+		if (project != null && !project.isSaved() && !project.isInitial()) {
+			int res = JOptionPane.showConfirmDialog(
+					this,
+					NLS.str("confirm.not_saved_message"),
+					NLS.str("confirm.not_saved_title"),
+					JOptionPane.YES_NO_CANCEL_OPTION);
+			if (res == JOptionPane.CANCEL_OPTION) {
+				return false;
+			}
+			if (res == JOptionPane.YES_OPTION) {
+				project.save();
+			}
+		}
+		return true;
+	}
+
+	private void openProject(Path path) {
+		if (!ensureProjectIsSaved()) {
+			return;
+		}
+		project = JadxProject.from(path, settings);
+		if (project == null) {
+			JOptionPane.showMessageDialog(
+					this,
+					NLS.str("msg.project_error"),
+					NLS.str("msg.project_error_title"),
+					JOptionPane.INFORMATION_MESSAGE
+			);
+			return;
+		}
+		update();
+		settings.addRecentProject(path);
+		Path filePath = project.getFilePath();
+		if (filePath == null) {
+			clearTree();
+		}
+		else {
+			open(filePath);
+		}
+	}
+
+	private void update() {
+		newProjectAction.setEnabled(!project.isInitial());
+		saveProjectAction.setEnabled(!project.isSaved());
+
+		Path projectPath = project.getProjectPath();
+		String pathString;
+		if (projectPath == null) {
+			pathString = "";
+		}
+		else {
+			pathString = " [" + projectPath.getParent().toAbsolutePath() + ']';
+		}
+		setTitle((project.isSaved() ? "" : '*')
+				+ project.getName() + pathString + " - " + DEFAULT_TITLE);
+
 	}
 
 	protected void resetCache() {
@@ -215,7 +384,7 @@ public class MainWindow extends JFrame {
 	public void reOpenFile() {
 		File openedFile = wrapper.getOpenFile();
 		if (openedFile != null) {
-			openFile(openedFile);
+			open(openedFile.toPath());
 		}
 	}
 
@@ -224,12 +393,12 @@ public class MainWindow extends JFrame {
 		fileChooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
 		fileChooser.setToolTipText(NLS.str("file.save_all_msg"));
 
-		String currentDirectory = settings.getLastSaveFilePath();
-		if (!currentDirectory.isEmpty()) {
-			fileChooser.setCurrentDirectory(new File(currentDirectory));
+		Path currentDirectory = settings.getLastSaveFilePath();
+		if (currentDirectory != null) {
+			fileChooser.setCurrentDirectory(currentDirectory.toFile());
 		}
 
-		int ret = fileChooser.showDialog(mainPanel, NLS.str("file.select"));
+		int ret = fileChooser.showSaveDialog(mainPanel);
 		if (ret == JFileChooser.APPROVE_OPTION) {
 			JadxArgs decompilerArgs = wrapper.getArgs();
 			decompilerArgs.setExportAsGradleProject(export);
@@ -240,7 +409,7 @@ public class MainWindow extends JFrame {
 				decompilerArgs.setSkipSources(settings.isSkipSources());
 				decompilerArgs.setSkipResources(settings.isSkipResources());
 			}
-			settings.setLastSaveFilePath(fileChooser.getCurrentDirectory().getPath());
+			settings.setLastSaveFilePath(fileChooser.getCurrentDirectory().toPath());
 			ProgressMonitor progressMonitor = new ProgressMonitor(mainPanel, NLS.str("msg.saving_sources"), "", 0, 100);
 			progressMonitor.setMillisToPopup(0);
 			wrapper.saveAll(fileChooser.getSelectedFile(), progressMonitor);
@@ -351,12 +520,36 @@ public class MainWindow extends JFrame {
 		Action openAction = new AbstractAction(NLS.str("file.open_action"), ICON_OPEN) {
 			@Override
 			public void actionPerformed(ActionEvent e) {
-				openFile();
+				openFileOrProject();
 			}
 		};
 		openAction.putValue(Action.SHORT_DESCRIPTION, NLS.str("file.open_action"));
 		openAction.putValue(Action.ACCELERATOR_KEY, getKeyStroke(KeyEvent.VK_O, KeyEvent.CTRL_DOWN_MASK));
 
+		newProjectAction = new AbstractAction(NLS.str("file.new_project")) {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				newProject();
+			}
+		};
+		newProjectAction.putValue(Action.SHORT_DESCRIPTION, NLS.str("file.new_project"));
+
+		saveProjectAction = new AbstractAction(NLS.str("file.save_project")) {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				saveProject();
+			}
+		};
+		saveProjectAction.putValue(Action.SHORT_DESCRIPTION, NLS.str("file.save_project"));
+
+		Action saveProjectAsAction = new AbstractAction(NLS.str("file.save_project_as")) {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				saveProjectAs();
+			}
+		};
+		saveProjectAsAction.putValue(Action.SHORT_DESCRIPTION, NLS.str("file.save_project_as"));
+
 		Action saveAllAction = new AbstractAction(NLS.str("file.save_all"), ICON_SAVE_ALL) {
 			@Override
 			public void actionPerformed(ActionEvent e) {
@@ -375,8 +568,8 @@ public class MainWindow extends JFrame {
 		exportAction.putValue(Action.SHORT_DESCRIPTION, NLS.str("file.export_gradle"));
 		exportAction.putValue(Action.ACCELERATOR_KEY, getKeyStroke(KeyEvent.VK_E, KeyEvent.CTRL_DOWN_MASK));
 
-		JMenu recentFiles = new JMenu(NLS.str("menu.recent_files"));
-		recentFiles.addMenuListener(new RecentFilesMenuListener(recentFiles));
+		JMenu recentProjects = new JMenu(NLS.str("menu.recent_projects"));
+		recentProjects.addMenuListener(new RecentProjectsMenuListener(recentProjects));
 
 		Action prefsAction = new AbstractAction(NLS.str("menu.preferences"), ICON_PREF) {
 			@Override
@@ -491,10 +684,15 @@ public class MainWindow extends JFrame {
 		JMenu file = new JMenu(NLS.str("menu.file"));
 		file.setMnemonic(KeyEvent.VK_F);
 		file.add(openAction);
+		file.addSeparator();
+		file.add(newProjectAction);
+		file.add(saveProjectAction);
+		file.add(saveProjectAsAction);
+		file.addSeparator();
 		file.add(saveAllAction);
 		file.add(exportAction);
 		file.addSeparator();
-		file.add(recentFiles);
+		file.add(recentProjects);
 		file.addSeparator();
 		file.add(prefsAction);
 		file.addSeparator();
@@ -694,11 +892,13 @@ public class MainWindow extends JFrame {
 		tabbedPane.loadSettings();
 	}
 
-	@Override
-	public void dispose() {
+	private void closeWindow() {
+		if (!ensureProjectIsSaved()) {
+			return;
+		}
 		settings.saveWindowPos(this);
 		cancelBackgroundJobs();
-		super.dispose();
+		dispose();
 	}
 
 	public JadxWrapper getWrapper() {
@@ -721,28 +921,27 @@ public class MainWindow extends JFrame {
 		return backgroundWorker;
 	}
 
-	private class RecentFilesMenuListener implements MenuListener {
-		private final JMenu recentFiles;
+	private class RecentProjectsMenuListener implements MenuListener {
+		private final JMenu recentProjects;
 
-		public RecentFilesMenuListener(JMenu recentFiles) {
-			this.recentFiles = recentFiles;
+		public RecentProjectsMenuListener(JMenu recentProjects) {
+			this.recentProjects = recentProjects;
 		}
 
 		@Override
 		public void menuSelected(MenuEvent menuEvent) {
-			recentFiles.removeAll();
+			recentProjects.removeAll();
 			File openFile = wrapper.getOpenFile();
-			String currentFile = openFile == null ? "" : openFile.getAbsolutePath();
-			for (final String file : settings.getRecentFiles()) {
-				if (file.equals(currentFile)) {
-					continue;
+			Path currentPath = openFile == null ? null : openFile.toPath();
+			for (final Path path : settings.getRecentProjects()) {
+				if (!path.equals(currentPath)) {
+					JMenuItem menuItem = new JMenuItem(path.toAbsolutePath().toString());
+					recentProjects.add(menuItem);
+					menuItem.addActionListener(e -> open(path));
 				}
-				JMenuItem menuItem = new JMenuItem(file);
-				recentFiles.add(menuItem);
-				menuItem.addActionListener(e -> openFile(new File(file)));
 			}
-			if (recentFiles.getItemCount() == 0) {
-				recentFiles.add(new JMenuItem(NLS.str("menu.no_recent_files")));
+			if (recentProjects.getItemCount() == 0) {
+				recentProjects.add(new JMenuItem(NLS.str("menu.no_recent_projects")));
 			}
 		}
 

jadx-gui/src/main/java/jadx/gui/utils/NLS.java

@@ -61,12 +61,14 @@ public class NLS {
 		i18nMessagesMap.put(locale, bundle);
 	}
 
-	public static String str(String key) {
+	public static String str(String key, Object... parameters) {
+		String value;
 		try {
-			return localizedMessagesMap.getString(key);
+			value = localizedMessagesMap.getString(key);
 		} catch (MissingResourceException e) {
-			return fallbackMessagesMap.getString(key); // definitely exists
+			value = fallbackMessagesMap.getString(key); // definitely exists
 		}
+		return String.format(value, parameters);
 	}
 
 	public static String str(String key, LangLocale locale) {

jadx-gui/src/main/java/jadx/gui/utils/PathTypeAdapter.java

+package jadx.gui.utils;
+
+import java.io.IOException;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+import com.google.gson.TypeAdapter;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonToken;
+import com.google.gson.stream.JsonWriter;
+
+public class PathTypeAdapter  {
+
+	private static TypeAdapter<Path> SINGLETON;
+
+	public static TypeAdapter<Path> singleton() {
+		if (SINGLETON == null) {
+			SINGLETON = new TypeAdapter<Path>() {
+
+				@Override
+				public void write(JsonWriter out, Path value) throws IOException {
+					if (value == null) {
+						out.nullValue();
+					} else {
+						out.value(value.toAbsolutePath().toString());
+					}
+				}
+
+				@Override
+				public Path read(JsonReader in) throws IOException {
+					if (in.peek() == JsonToken.NULL) {
+				         in.nextNull();
+				         return null;
+					}
+					return Paths.get(in.nextString());
+				}
+			};
+		}
+		return SINGLETON;
+	}
+
+	private PathTypeAdapter() {
+	}
+}

jadx-gui/src/main/resources/i18n/Messages_en_US.properties

@@ -2,8 +2,8 @@ language.name=English
 
 menu.file=File
 menu.view=View
-menu.recent_files=Recent Files
-menu.no_recent_files=No recent files
+menu.recent_projects=Recent projects
+menu.no_recent_projects=No recent projects
 menu.preferences=Preferences
 menu.sync=Sync with editor
 menu.flatten=Show flatten packages
@@ -20,17 +20,18 @@ menu.update_label=New version %s available!
 
 file.open_action=Open file...
 file.open_title=Open file
+file.new_project=New project
+file.save_project=Save project
+file.save_project_as=Save project as...
 file.save_all=Save all
 file.export_gradle=Save as gradle project
 file.save_all_msg=Select directory for save decompiled sources
-file.select=Select
 file.exit=Exit
 
 tree.sources_title=Source code
 tree.resources_title=Resources
 tree.loading=Loading...
 
-search=Search
 search.previous=Previous
 search.next=Next
 search.mark_all=Mark All
@@ -79,6 +80,7 @@ preferences.title=Preferences
 preferences.deobfuscation=Deobfuscation
 preferences.editor=Editor
 preferences.decompile=Decompilation
+preferences.project=Project
 preferences.other=Other
 preferences.language=Language
 preferences.check_for_updates=Check for updates on startup
@@ -89,6 +91,7 @@ preferences.replaceConsts=Replace constants
 preferences.respectBytecodeAccessModifiers=Respect bytecode access modifiers
 preferences.useImports=Use import statements
 preferences.skipResourcesDecode=Don't decode resources
+preferences.autoSave=Auto save
 preferences.threads=Processing threads count
 preferences.excludedPackages=Excluded packages
 preferences.excludedPackages.tooltip=List of space separated package names that will not be decompiled or indexed (saves RAM)
@@ -116,6 +119,8 @@ msg.saving_sources=Saving sources...
 msg.language_changed_title=Language changed
 msg.language_changed=New language will be displayed the next time application starts.
 msg.index_not_initialized=Index not initialized, search will be disabled!
+msg.project_error_title=Error
+msg.project_error=Project could not be loaded
 
 popup.undo=Undo
 popup.redo=Redo
@@ -127,11 +132,15 @@ popup.select_all=Select All
 popup.find_usage=Find Usage
 popup.exclude=Exclude
 
+confirm.save_as_title=Confirm Save as
+confirm.save_as_message=%s already exists.\nDo you want to replace it?
+confirm.not_saved_title=Save project
+confirm.not_saved_message=Save the current project before opening the new one?
+
 certificate.title=Certificate
 certificate.cert_type=Type
 certificate.serialSigVer=Version
 certificate.serialNumber=Serial number
-certificate.cert_issuer=Issuer
 certificate.cert_subject=Subject
 certificate.serialValidFrom=Valid from
 certificate.serialValidUntil=Valid until

jadx-gui/src/main/resources/i18n/Messages_es_ES.properties

@@ -2,8 +2,8 @@ language.name=Español
 
 menu.file=Archivo
 menu.view=Vista
-menu.recent_files=Archivos recientes
-menu.no_recent_files=No hay archivos recientes
+#menu.recent_projects=
+#menu.no_recent_projects=
 menu.preferences=Preferencias
 menu.sync=Sincronizar con el editor
 menu.flatten=Mostrar paquetes en vista plana
@@ -20,17 +20,18 @@ menu.update_label=¡Nueva versión %s disponible!
 
 file.open_action=Abrir archivo...
 file.open_title=Abrir archivo
+#file.new_project=
+#file.save_project=
+#file.save_project_as=
 file.save_all=Guardar todo
 file.export_gradle=Guardar como proyecto Gradle
 file.save_all_msg=Seleccionar carpeta para guardar fuentes descompiladas
-file.select=Seleccionar
 file.exit=Salir
 
 tree.sources_title=Código fuente
 tree.resources_title=Recursos
 tree.loading=Cargando...
 
-search=Buscar
 search.previous=Anterior
 search.next=Siguiente
 search.mark_all=Marcar todo
@@ -79,6 +80,7 @@ preferences.title=Preferencias
 preferences.deobfuscation=Desofuscación
 preferences.editor=Editor
 preferences.decompile=Descompilación
+#preferences.project=
 preferences.other=Otros
 preferences.language=Idioma
 preferences.check_for_updates=Buscar actualizaciones al iniciar
@@ -89,6 +91,7 @@ preferences.replaceConsts=Reemplazar constantes
 #preferences.respectBytecodeAccessModifiers=
 #preferences.useImports=
 preferences.skipResourcesDecode=No descodificar recursos
+#preferences.autoSave=
 preferences.threads=Número de hilos a procesar
 #preferences.excludedPackages=
 #preferences.excludedPackages.tooltip=
@@ -116,6 +119,8 @@ msg.saving_sources=Guardando fuente...
 msg.language_changed_title=Idioma cambiado
 msg.language_changed=El nuevo idioma se mostrará la próxima vez que la aplicación se inicie.
 msg.index_not_initialized=Índice no inicializado, ¡la bósqueda se desactivará!
+#msg.project_error_title=
+#msg.project_error=
 
 popup.undo=Deshacer
 popup.redo=Rehacer
@@ -127,11 +132,15 @@ popup.select_all=Seleccionar todo
 #popup.find_usage=
 #popup.exclude=
 
+#confirm.save_as_title=
+#confirm.save_as_message=
+#confirm.not_saved_title=
+#confirm.not_saved_message=
+
 certificate.title=Certificado
 certificate.cert_type=Tipo
 certificate.serialSigVer=Versión
 certificate.serialNumber=Número de serial
-certificate.cert_issuer=Issuer
 certificate.cert_subject=Subject
 certificate.serialValidFrom=Válido desde
 certificate.serialValidUntil=Válido hasta

jadx-gui/src/main/resources/i18n/Messages_zh_CN.properties

@@ -2,8 +2,8 @@ language.name=中文（简体）
 
 menu.file=文件
 menu.view=视图
-menu.recent_files=最近打开的文件
-menu.no_recent_files=无最近打开的文件
+#menu.recent_projects=
+#menu.no_recent_projects=
 menu.preferences=首选项
 menu.sync=与编辑器同步
 menu.flatten=展开显示代码包
@@ -20,17 +20,18 @@ menu.update_label=发现新版本 %s！
 
 file.open_action=打开文件...
 file.open_title=打开文件
+#file.new_project=
+#file.save_project=
+#file.save_project_as=
 file.save_all=全部保存
 file.export_gradle=另存为 Gradle 项目
 file.save_all_msg=选择反编译资源路径
-file.select=选择
 file.exit=退出
 
 tree.sources_title=源代码
 tree.resources_title=资源文件
 tree.loading=稍等...
 
-search=搜索
 search.previous=上一个
 search.next=下一个
 search.mark_all=标记全部
@@ -79,6 +80,7 @@ preferences.title=首选项
 preferences.deobfuscation=反混淆
 preferences.editor=编辑器
 preferences.decompile=反编译
+#preferences.project=
 preferences.other=其他
 preferences.language=语言
 preferences.check_for_updates=启动时检查更新
@@ -89,6 +91,7 @@ preferences.replaceConsts=替换常量
 preferences.respectBytecodeAccessModifiers=遵守字节码访问修饰符
 preferences.useImports=使用 import 语句
 preferences.skipResourcesDecode=不反编译资源文件
+#preferences.autoSave=
 preferences.threads=并行线程数
 preferences.excludedPackages=排除的包
 preferences.excludedPackages.tooltip=将不被解压缩或索引的以空格分隔的包名称列表（节省 RAM）
@@ -116,6 +119,8 @@ msg.saving_sources=正在导出源代码...
 msg.language_changed_title=语言已更改
 msg.language_changed=在下次启动时将会显示新的语言。
 msg.index_not_initialized=索引尚未初始化，无法进行搜索！
+#msg.project_error_title=
+#msg.project_error=
 
 popup.undo=撤销
 popup.redo=重做
@@ -127,11 +132,15 @@ popup.select_all=全选
 popup.find_usage=查找用例
 #popup.exclude=
 
+#confirm.save_as_title=
+#confirm.save_as_message=
+#confirm.not_saved_title=
+#confirm.not_saved_message=
+
 certificate.title=证书
 certificate.cert_type=类型
 certificate.serialSigVer=版本
 certificate.serialNumber=序列号
-certificate.cert_issuer=颁发者
 certificate.cert_subject=主题
 certificate.serialValidFrom=有效期始
 certificate.serialValidUntil=有效期至

jadx-gui/src/test/java/jadx/gui/TestI18n.java

 package jadx.gui;
 
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.empty;
 import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.fail;
+
 import java.io.IOException;
+import java.io.Reader;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.util.HashSet;
+import java.util.Iterator;
 import java.util.List;
+import java.util.Properties;
+import java.util.Set;
 
 import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
 
 public class TestI18n {
 
+	private static Path guiJavaPath;
+	private static Path i18nPath;
+
 	private List<String> reference;
 	private String referenceName;
 
+	@BeforeAll
+	public static void init() {
+		i18nPath = Paths.get("src/main/resources/i18n");
+		assertTrue(Files.exists(i18nPath));
+		guiJavaPath = Paths.get("src/main/java");
+		assertTrue(Files.exists(guiJavaPath));
+	}
+
 	@Test
 	public void filesExactlyMatch() throws IOException {
-		Path path = Paths.get("./src/main/resources/i18n");
-		assertTrue(Files.exists(path));
-		Files.list(path).forEach(p -> {
+		Files.list(i18nPath).forEach(p -> {
 			List<String> lines;
 			try {
 				lines = Files.readAllLines(p);
@@ -45,12 +64,12 @@ public class TestI18n {
 			if (p0 != -1) {
 				String prefix = line.substring(0, p0 + 1);
 				if (i >= lines.size() || !trimComment(lines.get(i)).startsWith(prefix)) {
-					fail(path, i + 1);
+					failLine(path, i + 1);
 				}
 			}
 		}
 		if (lines.size() != reference.size()) {
-			fail(path, reference.size());
+			failLine(path, reference.size());
 		}
 	}
 
@@ -58,7 +77,37 @@ public class TestI18n {
 		return string.startsWith("#") ? string.substring(1) : string;
 	}
 
-	private void fail(Path path, int line) {
-		Assertions.fail("I18n files " + path.getFileName() + " and " + referenceName + " differ in line " + line);
+	private void failLine(Path path, int line) {
+		fail("I18n files " + path.getFileName() + " and " + referenceName + " differ in line " + line);
+	}
+
+	@Test
+	public void keyIsUsed() throws IOException {
+		Properties properties = new Properties();
+		try (Reader reader = Files.newBufferedReader(i18nPath.resolve("Messages_en_US.properties"))) {
+			properties.load(reader);
+		}
+
+		Set<String> keys = new HashSet<>();
+		for (Object key : properties.keySet()) {
+			keys.add("\"" + key + '"');
+		}
+
+		Files.walk(guiJavaPath).filter(p -> Files.isRegularFile(p)).forEach(p -> {
+			try {
+				List<String> lines = Files.readAllLines(p);
+				for (String line : lines) {
+					for (Iterator<String> it = keys.iterator(); it.hasNext(); ) {
+						if (line.contains(it.next())) {
+							it.remove();
+						}
+					}
+				}
+			} catch (IOException e) {
+				throw new RuntimeException(e);
+			}
+		});
+
+		assertThat("keys not used", keys, empty());
 	}
 }