1 /* 2 * Copyright (C) 2023 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.internal.accessibility.dialog; 18 19 import static android.view.WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS; 20 21 import android.accessibilityservice.AccessibilityServiceInfo; 22 import android.annotation.SuppressLint; 23 import android.app.AlertDialog; 24 import android.content.Context; 25 import android.graphics.drawable.Drawable; 26 import android.text.BidiFormatter; 27 import android.view.LayoutInflater; 28 import android.view.MotionEvent; 29 import android.view.View; 30 import android.view.Window; 31 import android.view.WindowManager; 32 import android.widget.Button; 33 import android.widget.ImageView; 34 import android.widget.TextView; 35 import android.widget.Toast; 36 37 import androidx.annotation.NonNull; 38 39 import com.android.internal.R; 40 import com.android.internal.annotations.VisibleForTesting; 41 42 import java.util.Locale; 43 44 /** 45 * Utility class for creating the dialog that asks the user for explicit permission 46 * before an accessibility service is enabled. 47 */ 48 public class AccessibilityServiceWarning { 49 50 /** 51 * Returns an {@link AlertDialog} to be shown to confirm that the user 52 * wants to enable an {@link android.accessibilityservice.AccessibilityService}. 53 */ createAccessibilityServiceWarningDialog(@onNull Context context, @NonNull AccessibilityServiceInfo info, @NonNull View.OnClickListener allowListener, @NonNull View.OnClickListener denyListener, @NonNull View.OnClickListener uninstallListener)54 public static AlertDialog createAccessibilityServiceWarningDialog(@NonNull Context context, 55 @NonNull AccessibilityServiceInfo info, 56 @NonNull View.OnClickListener allowListener, 57 @NonNull View.OnClickListener denyListener, 58 @NonNull View.OnClickListener uninstallListener) { 59 final AlertDialog ad = new AlertDialog.Builder(context) 60 .setView(createAccessibilityServiceWarningDialogContentView( 61 context, info, allowListener, denyListener, uninstallListener)) 62 .setCancelable(true) 63 .create(); 64 Window window = ad.getWindow(); 65 WindowManager.LayoutParams params = window.getAttributes(); 66 params.privateFlags |= SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS; 67 window.setAttributes(params); 68 return ad; 69 } 70 71 @VisibleForTesting createAccessibilityServiceWarningDialogContentView(Context context, AccessibilityServiceInfo info, View.OnClickListener allowListener, View.OnClickListener denyListener, View.OnClickListener uninstallListener)72 public static View createAccessibilityServiceWarningDialogContentView(Context context, 73 AccessibilityServiceInfo info, 74 View.OnClickListener allowListener, 75 View.OnClickListener denyListener, 76 View.OnClickListener uninstallListener) { 77 final LayoutInflater inflater = context.getSystemService(LayoutInflater.class); 78 final View content = inflater.inflate(R.layout.accessibility_service_warning, null); 79 80 final Drawable icon; 81 if (info.getResolveInfo().getIconResource() == 0) { 82 icon = context.getDrawable(R.drawable.ic_accessibility_generic); 83 } else { 84 icon = info.getResolveInfo().loadIcon(context.getPackageManager()); 85 } 86 final ImageView permissionDialogIcon = content.findViewById( 87 R.id.accessibility_permissionDialog_icon); 88 permissionDialogIcon.setImageDrawable(icon); 89 90 final TextView permissionDialogTitle = content.findViewById( 91 R.id.accessibility_permissionDialog_title); 92 permissionDialogTitle.setText(context.getString(R.string.accessibility_enable_service_title, 93 getServiceName(context, info))); 94 95 final Button permissionAllowButton = content.findViewById( 96 R.id.accessibility_permission_enable_allow_button); 97 final Button permissionDenyButton = content.findViewById( 98 R.id.accessibility_permission_enable_deny_button); 99 permissionAllowButton.setOnClickListener(allowListener); 100 permissionAllowButton.setOnTouchListener(getTouchConsumingListener()); 101 permissionDenyButton.setOnClickListener(denyListener); 102 103 final Button uninstallButton = content.findViewById( 104 R.id.accessibility_permission_enable_uninstall_button); 105 // Show an uninstall button to help users quickly remove non-preinstalled apps. 106 if (!info.getResolveInfo().serviceInfo.applicationInfo.isSystemApp()) { 107 uninstallButton.setVisibility(View.VISIBLE); 108 uninstallButton.setOnClickListener(uninstallListener); 109 } 110 return content; 111 } 112 113 @VisibleForTesting 114 @SuppressLint("ClickableViewAccessibility") // Touches are intentionally consumed getTouchConsumingListener()115 public static View.OnTouchListener getTouchConsumingListener() { 116 return (view, event) -> { 117 // Filter obscured touches by consuming them. 118 if (((event.getFlags() & MotionEvent.FLAG_WINDOW_IS_OBSCURED) != 0) 119 || ((event.getFlags() & MotionEvent.FLAG_WINDOW_IS_PARTIALLY_OBSCURED) != 0)) { 120 if (event.getAction() == MotionEvent.ACTION_UP) { 121 Toast.makeText(view.getContext(), 122 R.string.accessibility_dialog_touch_filtered_warning, 123 Toast.LENGTH_SHORT).show(); 124 } 125 return true; 126 } 127 return false; 128 }; 129 } 130 131 // Get the service name and bidi wrap it to protect from bidi side effects. 132 private static CharSequence getServiceName(Context context, AccessibilityServiceInfo info) { 133 final Locale locale = context.getResources().getConfiguration().getLocales().get(0); 134 final CharSequence label = 135 info.getResolveInfo().loadLabel(context.getPackageManager()); 136 return BidiFormatter.getInstance(locale).unicodeWrap(label); 137 } 138 } 139