lineage-sdk: Add KILL_APP button action

This partially reverts commit 9eca90278d2936b83b420081bbc78d475627ba7e.

Change-Id: I9bfc039540936e4dbd4313c8f368ce3e3e445290

4 files changed, 76 insertions, 13 deletions

diff --git a/lineage/res/res/values/config.xml b/lineage/res/res/values/config.xml
index a902ce5f..659a5ac6 100644
--- a/lineage/res/res/values/config.xml
+++ b/lineage/res/res/values/config.xml
@@ -162,6 +162,7 @@
             7 - Sleep
             8 - Last app
             9 - Toggle split screen
+            10 - Kill foreground app
          This needs to match the enums in
          sdk/src/java/org/lineageos/internal/util/DeviceKeysConstants.java.
     -->
@@ -178,6 +179,7 @@
             7 - Sleep
             8 - Last app
             9 - Toggle split screen
+            10 - Kill foreground app
          This needs to match the enums in
          sdk/src/java/org/lineageos/internal/util/DeviceKeysConstants.java.
     -->
@@ -194,6 +196,7 @@
             7 - Sleep
             8 - Last app
             9 - Toggle split screen
+            10 - Kill foreground app
          This needs to match the enums in
          sdk/src/java/org/lineageos/internal/util/DeviceKeysConstants.java.
     -->
@@ -210,6 +213,7 @@
             7 - Sleep
             8 - Last app
             9 - Toggle split screen
+            10 - Kill foreground app
          This needs to match the enums in
          sdk/src/java/org/lineageos/internal/util/DeviceKeysConstants.java.
     -->
@@ -226,6 +230,7 @@
             7 - Sleep
             8 - Last app
             9 - Toggle split screen
+            10 - Kill foreground app
          This needs to match the enums in
          sdk/src/java/org/lineageos/internal/util/DeviceKeysConstants.java.
     -->
diff --git a/sdk/src/java/lineageos/providers/LineageSettings.java b/sdk/src/java/lineageos/providers/LineageSettings.java
index 4d5a3416..47a59067 100644
--- a/sdk/src/java/lineageos/providers/LineageSettings.java
+++ b/sdk/src/java/lineageos/providers/LineageSettings.java
@@ -1058,12 +1058,13 @@ public final class LineageSettings {
          * 7 - Action Sleep
          * 8 - Last app
          * 9 - Toggle split screen
+         * 10 - Kill foreground app
          */
         public static final String KEY_HOME_LONG_PRESS_ACTION = "key_home_long_press_action";
 
         /** @hide */
         public static final Validator KEY_HOME_LONG_PRESS_ACTION_VALIDATOR =
-                new InclusiveIntegerRangeValidator(0, 9);
+                new InclusiveIntegerRangeValidator(0, 10);
 
         /**
          * Action to perform when the home key is double-tapped.
@@ -1074,7 +1075,7 @@ public final class LineageSettings {
 
         /** @hide */
         public static final Validator KEY_HOME_DOUBLE_TAP_ACTION_VALIDATOR =
-                new InclusiveIntegerRangeValidator(0, 9);
+                new InclusiveIntegerRangeValidator(0, 10);
 
         /**
          * Action to perform when the back key is long-pressed.
@@ -1085,7 +1086,7 @@ public final class LineageSettings {
 
         /** @hide */
         public static final Validator KEY_BACK_LONG_PRESS_ACTION_VALIDATOR =
-                new InclusiveIntegerRangeValidator(0, 9);
+                new InclusiveIntegerRangeValidator(0, 10);
 
         /**
          * Whether to wake the screen with the back key, the value is boolean.
@@ -1134,7 +1135,7 @@ public final class LineageSettings {
 
         /** @hide */
         public static final Validator KEY_MENU_ACTION_VALIDATOR =
-                new InclusiveIntegerRangeValidator(0, 9);
+                new InclusiveIntegerRangeValidator(0, 10);
 
         /**
          * Action to perform when the menu key is long-pressed.
@@ -1145,7 +1146,7 @@ public final class LineageSettings {
 
         /** @hide */
         public static final Validator KEY_MENU_LONG_PRESS_ACTION_VALIDATOR =
-                new InclusiveIntegerRangeValidator(0, 9);
+                new InclusiveIntegerRangeValidator(0, 10);
 
         /**
          * Action to perform when the assistant (search) key is pressed. (Default is 3)
@@ -1155,7 +1156,7 @@ public final class LineageSettings {
 
         /** @hide */
         public static final Validator KEY_ASSIST_ACTION_VALIDATOR =
-                new InclusiveIntegerRangeValidator(0, 9);
+                new InclusiveIntegerRangeValidator(0, 10);
 
         /**
          * Action to perform when the assistant (search) key is long-pressed. (Default is 4)
@@ -1165,7 +1166,7 @@ public final class LineageSettings {
 
         /** @hide */
         public static final Validator KEY_ASSIST_LONG_PRESS_ACTION_VALIDATOR =
-                new InclusiveIntegerRangeValidator(0, 9);
+                new InclusiveIntegerRangeValidator(0, 10);
 
         /**
          * Action to perform when the app switch key is pressed. (Default is 2)
@@ -1175,7 +1176,7 @@ public final class LineageSettings {
 
         /** @hide */
         public static final Validator KEY_APP_SWITCH_ACTION_VALIDATOR =
-                new InclusiveIntegerRangeValidator(0, 9);
+                new InclusiveIntegerRangeValidator(0, 10);
 
         /**
          * Action to perform when the app switch key is long-pressed. (Default is 0)
@@ -1185,7 +1186,7 @@ public final class LineageSettings {
 
         /** @hide */
         public static final Validator KEY_APP_SWITCH_LONG_PRESS_ACTION_VALIDATOR =
-                new InclusiveIntegerRangeValidator(0, 9);
+                new InclusiveIntegerRangeValidator(0, 10);
 
         /**
          * Action to perform when the screen edge is long-swiped. (Default is 0)
@@ -1195,7 +1196,7 @@ public final class LineageSettings {
 
         /** @hide */
         public static final Validator KEY_EDGE_LONG_SWIPE_ACTION_VALIDATOR =
-                new InclusiveIntegerRangeValidator(0, 9);
+                new InclusiveIntegerRangeValidator(0, 10);
 
         /**
          * Whether to wake the screen with the home key, the value is boolean.
diff --git a/sdk/src/java/org/lineageos/internal/util/ActionUtils.java b/sdk/src/java/org/lineageos/internal/util/ActionUtils.java
index 299c4a29..a7955814 100644
--- a/sdk/src/java/org/lineageos/internal/util/ActionUtils.java
+++ b/sdk/src/java/org/lineageos/internal/util/ActionUtils.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018-2020 The LineageOS Project
+ * Copyright (C) 2018-2021 The LineageOS Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,6 +17,7 @@
 package org.lineageos.internal.util;
 
 import android.app.ActivityManager;
+import android.app.ActivityManager.StackInfo;
 import android.app.ActivityManagerNative;
 import android.app.ActivityOptions;
 import android.app.IActivityManager;
@@ -25,7 +26,11 @@ import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
 import android.os.RemoteException;
+import android.os.UserHandle;
 import android.util.Log;
+import android.widget.Toast;
+
+import org.lineageos.platform.internal.R;
 
 import java.util.List;
 
@@ -35,6 +40,38 @@ public class ActionUtils {
     private static final String SYSTEMUI_PACKAGE = "com.android.systemui";
 
     /**
+     * Kills the top most / most recent user application, but leaves out the launcher.
+     *
+     * @param context the current context, used to retrieve the package manager.
+     * @param userId the ID of the currently active user
+     * @return {@code true} when a user application was found and closed.
+     */
+    public static boolean killForegroundApp(Context context, int userId) {
+        try {
+            return killForegroundAppInternal(context, userId);
+        } catch (RemoteException e) {
+            Log.e(TAG, "Could not kill foreground app");
+        }
+        return false;
+    }
+
+    private static boolean killForegroundAppInternal(Context context, int userId)
+            throws RemoteException {
+        final String packageName = getForegroundTaskPackageName(context, userId);
+
+        if (packageName == null) {
+            return false;
+        }
+
+        final IActivityManager am = ActivityManagerNative.getDefault();
+        am.forceStopPackage(packageName, UserHandle.USER_CURRENT);
+
+        Toast.makeText(context, R.string.app_killed_message, Toast.LENGTH_SHORT).show();
+
+        return true;
+    }
+
+    /**
      * Attempt to bring up the last activity in the stack before the current active one.
      *
      * @param context
@@ -92,6 +129,25 @@ public class ActionUtils {
         return null;
     }
 
+    private static String getForegroundTaskPackageName(Context context, int userId)
+            throws RemoteException {
+        final String defaultHomePackage = resolveCurrentLauncherPackage(context, userId);
+        final IActivityManager am = ActivityManager.getService();
+        final StackInfo focusedStack = am.getFocusedStackInfo();
+
+        if (focusedStack == null || focusedStack.topActivity == null) {
+            return null;
+        }
+
+        final String packageName = focusedStack.topActivity.getPackageName();
+        if (!packageName.equals(defaultHomePackage)
+                && !packageName.equals(SYSTEMUI_PACKAGE)) {
+            return packageName;
+        }
+
+        return null;
+    }
+
     private static String resolveCurrentLauncherPackage(Context context, int userId) {
         final Intent launcherIntent = new Intent(Intent.ACTION_MAIN)
                 .addCategory(Intent.CATEGORY_HOME);
diff --git a/sdk/src/java/org/lineageos/internal/util/DeviceKeysConstants.java b/sdk/src/java/org/lineageos/internal/util/DeviceKeysConstants.java
index 29ed678c..8fd7723b 100644
--- a/sdk/src/java/org/lineageos/internal/util/DeviceKeysConstants.java
+++ b/sdk/src/java/org/lineageos/internal/util/DeviceKeysConstants.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2017 The LineageOS Project
+ * Copyright (C) 2018,2021 The LineageOS Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -35,7 +35,8 @@ public class DeviceKeysConstants {
         LAUNCH_CAMERA,
         SLEEP,
         LAST_APP,
-        SPLIT_SCREEN;
+        SPLIT_SCREEN,
+        KILL_APP;
 
         public static Action fromIntSafe(int id) {
             if (id < NOTHING.ordinal() || id > Action.values().length) {