Expose APK path from Java

The cleanup process will need to know the APK path to execute the
CleanUp java executable.

server/src/main/java/com/genymobile/scrcpy/Device.java

@@ -7,6 +7,7 @@ import com.genymobile.scrcpy.wrappers.SurfaceControl;
 import com.genymobile.scrcpy.wrappers.WindowManager;
 
 import android.content.IOnPrimaryClipChangedListener;
+import android.content.pm.ApplicationInfo;
 import android.graphics.Rect;
 import android.os.Build;
 import android.os.IBinder;
@@ -21,6 +22,8 @@ import java.util.concurrent.atomic.AtomicBoolean;
 
 public final class Device {
 
+    private static final String SCRCPY_PACKAGE_NAME = "com.genymobile.scrcpy";
+
     public static final int POWER_MODE_OFF = SurfaceControl.POWER_MODE_OFF;
     public static final int POWER_MODE_NORMAL = SurfaceControl.POWER_MODE_NORMAL;
 
@@ -312,4 +315,12 @@ public final class Device {
             wm.thawRotation();
         }
     }
+
+    public static String getInstalledApkPath() {
+        ApplicationInfo info = ServiceManager.getPackageManager().getApplicationInfo(SCRCPY_PACKAGE_NAME);
+        if (info == null) {
+            return null;
+        }
+        return info.sourceDir;
+    }
 }

server/src/main/java/com/genymobile/scrcpy/wrappers/PackageManager.java

@@ -0,0 +1,36 @@
+package com.genymobile.scrcpy.wrappers;
+
+import com.genymobile.scrcpy.Ln;
+
+import android.content.pm.ApplicationInfo;
+import android.os.IInterface;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+public class PackageManager {
+
+    private IInterface manager;
+    private Method getApplicationInfoMethod;
+
+    public PackageManager(IInterface manager) {
+        this.manager = manager;
+    }
+
+    private Method getGetApplicationInfoMethod() throws NoSuchMethodException {
+        if (getApplicationInfoMethod == null) {
+            getApplicationInfoMethod = manager.getClass().getDeclaredMethod("getApplicationInfo", String.class, int.class, int.class);
+        }
+        return getApplicationInfoMethod;
+    }
+
+    public ApplicationInfo getApplicationInfo(String packageName) {
+        try {
+            Method method = getGetApplicationInfoMethod();
+            return (ApplicationInfo) method.invoke(manager, packageName, 0, ServiceManager.USER_ID);
+        } catch (NoSuchMethodException | InvocationTargetException | IllegalAccessException e) {
+            Ln.e("Cannot get application info", e);
+            return null;
+        }
+    }
+}

server/src/main/java/com/genymobile/scrcpy/wrappers/ServiceManager.java

@@ -29,6 +29,7 @@ public final class ServiceManager {
     private static StatusBarManager statusBarManager;
     private static ClipboardManager clipboardManager;
     private static ActivityManager activityManager;
+    private static PackageManager packageManager;
 
     private ServiceManager() {
         /* not instantiable */
@@ -122,4 +123,20 @@ public final class ServiceManager {
 
         return activityManager;
     }
+
+    public static PackageManager getPackageManager() {
+        if (packageManager == null) {
+            try {
+                //IInterface manager = getService("package", "android.content.pm.IPackageManager");
+                Class<?> activityThreadClass = Class.forName("android.app.ActivityThread");
+                Method getPackageManager = activityThreadClass.getDeclaredMethod("getPackageManager");
+                IInterface manager = (IInterface) getPackageManager.invoke(null);
+                return new PackageManager(manager);
+            } catch (Exception e) {
+                throw new AssertionError(e);
+            }
+        }
+
+        return packageManager;
+    }
 }