From 8c6799297b6c84a21509d5847106494b389d0b97 Mon Sep 17 00:00:00 2001 From: Romain Vimont Date: Sun, 17 Nov 2019 15:23:16 +0100 Subject: [PATCH] Implement access to settings without Context Expose methods to access the Android settings using private APIs. This allows to read and write settings values immediately without starting a new process to call "settings". --- .../java/com/genymobile/scrcpy/Device.java | 5 + .../scrcpy/wrappers/ActivityManager.java | 87 ++++++++++++ .../scrcpy/wrappers/ContentProvider.java | 132 ++++++++++++++++++ .../scrcpy/wrappers/ServiceManager.java | 18 +++ 4 files changed, 242 insertions(+) create mode 100644 server/src/main/java/com/genymobile/scrcpy/wrappers/ActivityManager.java create mode 100644 server/src/main/java/com/genymobile/scrcpy/wrappers/ContentProvider.java diff --git a/server/src/main/java/com/genymobile/scrcpy/Device.java b/server/src/main/java/com/genymobile/scrcpy/Device.java index 0c43dd340e..6aa339a161 100644 --- a/server/src/main/java/com/genymobile/scrcpy/Device.java +++ b/server/src/main/java/com/genymobile/scrcpy/Device.java @@ -1,5 +1,6 @@ package com.genymobile.scrcpy; +import com.genymobile.scrcpy.wrappers.ContentProvider; import com.genymobile.scrcpy.wrappers.InputManager; import com.genymobile.scrcpy.wrappers.ServiceManager; import com.genymobile.scrcpy.wrappers.SurfaceControl; @@ -199,4 +200,8 @@ public void rotateDevice() { wm.thawRotation(); } } + + public ContentProvider createSettingsProvider() { + return serviceManager.getActivityManager().createSettingsProvider(); + } } diff --git a/server/src/main/java/com/genymobile/scrcpy/wrappers/ActivityManager.java b/server/src/main/java/com/genymobile/scrcpy/wrappers/ActivityManager.java new file mode 100644 index 0000000000..71967c500c --- /dev/null +++ b/server/src/main/java/com/genymobile/scrcpy/wrappers/ActivityManager.java @@ -0,0 +1,87 @@ +package com.genymobile.scrcpy.wrappers; + +import com.genymobile.scrcpy.Ln; + +import android.os.Binder; +import android.os.IBinder; +import android.os.IInterface; + +import java.lang.reflect.Field; +import java.lang.reflect.InvocationTargetException; +import java.lang.reflect.Method; + +public class ActivityManager { + + private final IInterface manager; + private Method getContentProviderExternalMethod; + private boolean getContentProviderExternalMethodLegacy; + private Method removeContentProviderExternalMethod; + + public ActivityManager(IInterface manager) { + this.manager = manager; + } + + private Method getGetContentProviderExternalMethod() throws NoSuchMethodException { + if (getContentProviderExternalMethod == null) { + try { + getContentProviderExternalMethod = manager.getClass() + .getMethod("getContentProviderExternal", String.class, int.class, IBinder.class, String.class); + } catch (NoSuchMethodException e) { + // old version + getContentProviderExternalMethod = manager.getClass().getMethod("getContentProviderExternal", String.class, int.class, IBinder.class); + getContentProviderExternalMethodLegacy = true; + } + } + return getContentProviderExternalMethod; + } + + private Method getRemoveContentProviderExternalMethod() throws NoSuchMethodException { + if (removeContentProviderExternalMethod == null) { + removeContentProviderExternalMethod = manager.getClass().getMethod("removeContentProviderExternal", String.class, IBinder.class); + } + return removeContentProviderExternalMethod; + } + + private ContentProvider getContentProviderExternal(String name, IBinder token) { + try { + Method method = getGetContentProviderExternalMethod(); + Object[] args; + if (!getContentProviderExternalMethodLegacy) { + // new version + args = new Object[]{name, ServiceManager.USER_ID, token, null}; + } else { + // old version + args = new Object[]{name, ServiceManager.USER_ID, token}; + } + // ContentProviderHolder providerHolder = getContentProviderExternal(...); + Object providerHolder = method.invoke(manager, args); + if (providerHolder == null) { + return null; + } + // IContentProvider provider = providerHolder.provider; + Field providerField = providerHolder.getClass().getDeclaredField("provider"); + providerField.setAccessible(true); + Object provider = providerField.get(providerHolder); + if (provider == null) { + return null; + } + return new ContentProvider(this, provider, name, token); + } catch (InvocationTargetException | IllegalAccessException | NoSuchMethodException | NoSuchFieldException e) { + Ln.e("Could not invoke method", e); + return null; + } + } + + void removeContentProviderExternal(String name, IBinder token) { + try { + Method method = getRemoveContentProviderExternalMethod(); + method.invoke(manager, name, token); + } catch (InvocationTargetException | IllegalAccessException | NoSuchMethodException e) { + Ln.e("Could not invoke method", e); + } + } + + public ContentProvider createSettingsProvider() { + return getContentProviderExternal("settings", new Binder()); + } +} diff --git a/server/src/main/java/com/genymobile/scrcpy/wrappers/ContentProvider.java b/server/src/main/java/com/genymobile/scrcpy/wrappers/ContentProvider.java new file mode 100644 index 0000000000..b43494c77d --- /dev/null +++ b/server/src/main/java/com/genymobile/scrcpy/wrappers/ContentProvider.java @@ -0,0 +1,132 @@ +package com.genymobile.scrcpy.wrappers; + +import com.genymobile.scrcpy.Ln; + +import android.os.Bundle; +import android.os.IBinder; + +import java.io.Closeable; +import java.lang.reflect.InvocationTargetException; +import java.lang.reflect.Method; + +public class ContentProvider implements Closeable { + + public static final String TABLE_SYSTEM = "system"; + public static final String TABLE_SECURE = "secure"; + public static final String TABLE_GLOBAL = "global"; + + // See android/providerHolder/Settings.java + private static final String CALL_METHOD_GET_SYSTEM = "GET_system"; + private static final String CALL_METHOD_GET_SECURE = "GET_secure"; + private static final String CALL_METHOD_GET_GLOBAL = "GET_global"; + + private static final String CALL_METHOD_PUT_SYSTEM = "PUT_system"; + private static final String CALL_METHOD_PUT_SECURE = "PUT_secure"; + private static final String CALL_METHOD_PUT_GLOBAL = "PUT_global"; + + private static final String CALL_METHOD_USER_KEY = "_user"; + + private static final String NAME_VALUE_TABLE_VALUE = "value"; + + private final ActivityManager manager; + // android.content.IContentProvider + private final Object provider; + private final String name; + private final IBinder token; + + private Method callMethod; + private boolean callMethodLegacy; + + ContentProvider(ActivityManager manager, Object provider, String name, IBinder token) { + this.manager = manager; + this.provider = provider; + this.name = name; + this.token = token; + } + + private Method getCallMethod() throws NoSuchMethodException { + if (callMethod == null) { + try { + callMethod = provider.getClass().getMethod("call", String.class, String.class, String.class, String.class, Bundle.class); + } catch (NoSuchMethodException e) { + // old version + callMethod = provider.getClass().getMethod("call", String.class, String.class, String.class, Bundle.class); + callMethodLegacy = true; + } + } + return callMethod; + } + + private Bundle call(String callMethod, String arg, Bundle extras) { + try { + Method method = getCallMethod(); + Object[] args; + if (!callMethodLegacy) { + args = new Object[]{ServiceManager.PACKAGE_NAME, "settings", callMethod, arg, extras}; + } else { + args = new Object[]{ServiceManager.PACKAGE_NAME, callMethod, arg, extras}; + } + return (Bundle) method.invoke(provider, args); + } catch (InvocationTargetException | IllegalAccessException | NoSuchMethodException e) { + Ln.e("Could not invoke method", e); + return null; + } + } + + public void close() { + manager.removeContentProviderExternal(name, token); + } + + private static String getGetMethod(String table) { + switch (table) { + case TABLE_SECURE: + return CALL_METHOD_GET_SECURE; + case TABLE_SYSTEM: + return CALL_METHOD_GET_SYSTEM; + case TABLE_GLOBAL: + return CALL_METHOD_GET_GLOBAL; + default: + throw new IllegalArgumentException("Invalid table: " + table); + } + } + + private static String getPutMethod(String table) { + switch (table) { + case TABLE_SECURE: + return CALL_METHOD_PUT_SECURE; + case TABLE_SYSTEM: + return CALL_METHOD_PUT_SYSTEM; + case TABLE_GLOBAL: + return CALL_METHOD_PUT_GLOBAL; + default: + throw new IllegalArgumentException("Invalid table: " + table); + } + } + + public String getValue(String table, String key) { + String method = getGetMethod(table); + Bundle arg = new Bundle(); + arg.putInt(CALL_METHOD_USER_KEY, ServiceManager.USER_ID); + Bundle bundle = call(method, key, arg); + if (bundle == null) { + return null; + } + return bundle.getString("value"); + } + + public void putValue(String table, String key, String value) { + String method = getPutMethod(table); + Bundle arg = new Bundle(); + arg.putInt(CALL_METHOD_USER_KEY, ServiceManager.USER_ID); + arg.putString(NAME_VALUE_TABLE_VALUE, value); + call(method, key, arg); + } + + public String getAndPutValue(String table, String key, String value) { + String oldValue = getValue(table, key); + if (!value.equals(oldValue)) { + putValue(table, key, value); + } + return oldValue; + } +} diff --git a/server/src/main/java/com/genymobile/scrcpy/wrappers/ServiceManager.java b/server/src/main/java/com/genymobile/scrcpy/wrappers/ServiceManager.java index cc56783792..f7985813ee 100644 --- a/server/src/main/java/com/genymobile/scrcpy/wrappers/ServiceManager.java +++ b/server/src/main/java/com/genymobile/scrcpy/wrappers/ServiceManager.java @@ -16,6 +16,7 @@ public final class ServiceManager { private PowerManager powerManager; private StatusBarManager statusBarManager; private ClipboardManager clipboardManager; + private ActivityManager activityManager; public ServiceManager() { try { @@ -76,4 +77,21 @@ public ClipboardManager getClipboardManager() { } return clipboardManager; } + + public ActivityManager getActivityManager() { + if (activityManager == null) { + try { + // On old Android versions, the ActivityManager is not exposed via AIDL, + // so use ActivityManagerNative.getDefault() + Class cls = Class.forName("android.app.ActivityManagerNative"); + Method getDefaultMethod = cls.getDeclaredMethod("getDefault"); + IInterface am = (IInterface) getDefaultMethod.invoke(null); + activityManager = new ActivityManager(am); + } catch (Exception e) { + throw new AssertionError(e); + } + } + + return activityManager; + } }