lineage-sdk internal: Import ActionUtils class

Change-Id: Iab14009d7e26064c8c6b732cf22be90da3ef7f04

sdk/src/java/org/lineageos/internal/util/ActionUtils.java

@@ -0,0 +1,149 @@
+package org.lineageos.internal.util;
+
+import android.app.ActivityManager;
+import android.app.ActivityManagerNative;
+import android.app.ActivityOptions;
+import android.app.IActivityManager;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.os.Process;
+import android.os.RemoteException;
+import android.os.UserHandle;
+import android.util.Log;
+import android.view.HapticFeedbackConstants;
+import android.widget.Toast;
+
+import org.lineageos.platform.internal.R;
+
+import java.util.List;
+
+public class ActionUtils {
+    private static final boolean DEBUG = false;
+    private static final String TAG = ActionUtils.class.getSimpleName();
+    private static final String SYSTEMUI_PACKAGE = "com.android.systemui";
+
+    /**
+     * Kills the top most / most recent user application, but leaves out the launcher.
+     * This is function governed by {@link Settings.Secure.KILL_APP_LONGPRESS_BACK}.
+     *
+     * @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 {
+        try {
+            final Intent intent = new Intent(Intent.ACTION_MAIN);
+            String defaultHomePackage = "com.android.launcher";
+            intent.addCategory(Intent.CATEGORY_HOME);
+            final ResolveInfo res = context.getPackageManager().resolveActivity(intent, 0);
+
+            if (res.activityInfo != null && !res.activityInfo.packageName.equals("android")) {
+                defaultHomePackage = res.activityInfo.packageName;
+            }
+
+            IActivityManager am = ActivityManagerNative.getDefault();
+            List<ActivityManager.RunningAppProcessInfo> apps = am.getRunningAppProcesses();
+            for (ActivityManager.RunningAppProcessInfo appInfo : apps) {
+                int uid = appInfo.uid;
+                // Make sure it's a foreground user application (not system,
+                // root, phone, etc.)
+                if (uid >= Process.FIRST_APPLICATION_UID && uid <= Process.LAST_APPLICATION_UID
+                        && appInfo.importance ==
+                        ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
+                    if (appInfo.pkgList != null && (appInfo.pkgList.length > 0)) {
+                        for (String pkg : appInfo.pkgList) {
+                            if (!pkg.equals(SYSTEMUI_PACKAGE)
+                                    && !pkg.equals(defaultHomePackage)) {
+                                am.forceStopPackage(pkg, UserHandle.USER_CURRENT);
+                                return true;
+                            }
+                        }
+                    } else {
+                        Process.killProcess(appInfo.pid);
+                        return true;
+                    }
+                }
+            }
+        } catch (RemoteException remoteException) {
+            // Do nothing; just let it go.
+        }
+        return false;
+    }
+
+    /**
+     * Attempt to bring up the last activity in the stack before the current active one.
+     *
+     * @param context
+     * @return whether an activity was found to switch to
+     */
+    public static boolean switchToLastApp(Context context, int userId) {
+        try {
+            return switchToLastAppInternal(context, userId);
+        } catch (RemoteException e) {
+            Log.e(TAG, "Could not switch to last app");
+        }
+        return false;
+    }
+
+    private static boolean switchToLastAppInternal(Context context, int userId)
+            throws RemoteException {
+        ActivityManager.RecentTaskInfo lastTask = getLastTask(context, userId);
+
+        if (lastTask == null || lastTask.id < 0) {
+            return false;
+        }
+
+        final String packageName = lastTask.baseIntent.getComponent().getPackageName();
+        final IActivityManager am = ActivityManagerNative.getDefault();
+        final ActivityOptions opts = ActivityOptions.makeCustomAnimation(context,
+                org.lineageos.platform.internal.R.anim.last_app_in,
+                org.lineageos.platform.internal.R.anim.last_app_out);
+
+        if (DEBUG) Log.d(TAG, "switching to " + packageName);
+        am.moveTaskToFront(lastTask.id, ActivityManager.MOVE_TASK_NO_USER_ACTION, opts.toBundle());
+
+        return true;
+    }
+
+    private static ActivityManager.RecentTaskInfo getLastTask(Context context, int userId)
+            throws RemoteException {
+        final String defaultHomePackage = resolveCurrentLauncherPackage(context, userId);
+        final ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
+        final List<ActivityManager.RecentTaskInfo> tasks = am.getRecentTasksForUser(5,
+                ActivityManager.RECENT_IGNORE_UNAVAILABLE, userId);
+
+        for (int i = 1; i < tasks.size(); i++) {
+            ActivityManager.RecentTaskInfo task = tasks.get(i);
+            if (task.origActivity != null) {
+                task.baseIntent.setComponent(task.origActivity);
+            }
+            String packageName = task.baseIntent.getComponent().getPackageName();
+            if (!packageName.equals(defaultHomePackage)
+                    && !packageName.equals(SYSTEMUI_PACKAGE)) {
+                return tasks.get(i);
+            }
+        }
+
+        return null;
+    }
+
+    private static String resolveCurrentLauncherPackage(Context context, int userId) {
+        final Intent launcherIntent = new Intent(Intent.ACTION_MAIN)
+                .addCategory(Intent.CATEGORY_HOME);
+        final PackageManager pm = context.getPackageManager();
+        final ResolveInfo launcherInfo = pm.resolveActivityAsUser(launcherIntent, 0, userId);
+        return launcherInfo.activityInfo.packageName;
+    }
+}