By implementing AccessibilityService (https://developer.android.com/training/accessibility/service.html) you get access to that features.
You can either inspect or perform action on the element lastly interacted by user or inspect whole application which currently active.
Intercept user events by implementing onAccessibilityEvent(AccessibilityEvent event), here you can retrieve virtual view (representing original view) with event.getSource() and then inspect it with getClassName() or getText() or anything you find in the documentation.
Inspect whole application by calling getRootInActiveWindow() and iterate throught tree of virtaul views with getRootInActiveWindow().getChild(index).
Both getRootInActiveWindow() and event.getSource() return AccessibilityNodeInfo, on which you can invoke performAction(action) and do something like Click, Set Text, etc..
Example: Play Store
Search for 'facebook' app and open it's page on play store, once you opened the play store app.
@Override
public void onAccessibilityEvent(final AccessibilityEvent event) {
AccessibilityNodeInfo rootInActiveWindow = getRootInActiveWindow();
//Inspect app elements if ready
if (rootInActiveWindow != null) {
//Search bar is covered with textview which need to be clicked
List<AccessibilityNodeInfo> searchBarIdle = rootInActiveWindow.findAccessibilityNodeInfosByViewId("com.android.vending:id/search_box_idle_text");
if (searchBarIdle.size() > 0) {
AccessibilityNodeInfo searchBar = searchBarIdle.get(0);
searchBar.performAction(AccessibilityNodeInfo.ACTION_CLICK);
}
//Check is search bar is visible
List<AccessibilityNodeInfo> searchBars = rootInActiveWindow.findAccessibilityNodeInfosByViewId("com.android.vending:id/search_box_text_input");
if (searchBars.size() > 0) {
AccessibilityNodeInfo searchBar = searchBars.get(0);
//Check is searchbar have the required text, if not set the text
if (searchBar.getText() == null || !searchBar.getText().toString().equalsIgnoreCase("facebook")) {
Bundle args = new Bundle();
args.putString(AccessibilityNodeInfo.ACTION_ARGUMENT_SET_TEXT_CHARSEQUENCE, "facebook");
searchBar.performAction(AccessibilityNodeInfo.ACTION_SET_TEXT, args);
} else {
//There is no way to press Enter to perform search, so find corresponding suggestion and click
List<AccessibilityNodeInfo> searchSuggestions = rootInActiveWindow.findAccessibilityNodeInfosByViewId("com.android.vending:id/suggest_text");
for (AccessibilityNodeInfo suggestion : searchSuggestions) {
if(suggestion.getText().toString().equals("Facebook")) {
//We found textview, but its not clickable, so we should perform the click on the parent
AccessibilityNodeInfo clickableParent = suggestion.getParent();
clickableParent.performAction(AccessibilityNodeInfo.ACTION_CLICK);
}
}
}
}
}
}
EDIT: full code below:
MyAccessibilityService
public class MyAccessibilityService extends AccessibilityService {
@Override
public void onCreate() {
super.onCreate();
Log.d("MyAccessibilityService", "onCreate");
}
@Override
public void onAccessibilityEvent(final AccessibilityEvent event) {
Log.d("MyAccessibilityService", "onAccessibilityEvent");
AccessibilityNodeInfo rootInActiveWindow = getRootInActiveWindow();
//Inspect app elements if ready
if (rootInActiveWindow != null) {
//Search bar is covered with textview which need to be clicked
List<AccessibilityNodeInfo> searchBarIdle = rootInActiveWindow.findAccessibilityNodeInfosByViewId("com.android.vending:id/search_box_idle_text");
if (searchBarIdle.size() > 0) {
AccessibilityNodeInfo searchBar = searchBarIdle.get(0);
searchBar.performAction(AccessibilityNodeInfo.ACTION_CLICK);
}
//Check is search bar is visible
List<AccessibilityNodeInfo> searchBars = rootInActiveWindow.findAccessibilityNodeInfosByViewId("com.android.vending:id/search_box_text_input");
if (searchBars.size() > 0) {
AccessibilityNodeInfo searchBar = searchBars.get(0);
//Check is searchbar have the required text, if not set the text
if (searchBar.getText() == null || !searchBar.getText().toString().equalsIgnoreCase("facebook")) {
Bundle args = new Bundle();
args.putString(AccessibilityNodeInfo.ACTION_ARGUMENT_SET_TEXT_CHARSEQUENCE, "facebook");
searchBar.performAction(AccessibilityNodeInfo.ACTION_SET_TEXT, args);
} else {
//There is no way to press Enter to perform search, so find corresponding suggestion and click
List<AccessibilityNodeInfo> searchSuggestions = rootInActiveWindow.findAccessibilityNodeInfosByViewId("com.android.vending:id/suggest_text");
for (AccessibilityNodeInfo suggestion : searchSuggestions) {
if (suggestion.getText().toString().equals("Facebook")) {
//We found textview, but its not clickable, so we should perform the click on the parent
AccessibilityNodeInfo clickableParent = suggestion.getParent();
clickableParent.performAction(AccessibilityNodeInfo.ACTION_CLICK);
}
}
}
}
}
}
@Override
public void onInterrupt() {
}
}
AndroidManifest.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.findfacebookapp">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<service
android:name=".MyAccessibilityService"
android:label="@string/accessibility_service_label"
android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE">
<intent-filter>
<action android:name="android.accessibilityservice.AccessibilityService"/>
</intent-filter>
<meta-data
android:name="android.accessibilityservice"
android:resource="@xml/accessibility_service_config"/>
</service>
</application>
</manifest>
res/xml/accessibility_service_config.xml
<?xml version="1.0" encoding="utf-8"?>
<accessibility-service
xmlns:android="http://schemas.android.com/apk/res/android"
android:accessibilityEventTypes="typeAllMask"
android:accessibilityFeedbackType="feedbackAllMask"
android:accessibilityFlags="flagDefault"
android:canRequestEnhancedWebAccessibility="true"
android:canRetrieveWindowContent="true"
android:description="@string/app_name"
android:notificationTimeout="100"/>
MainActivity
public class MainActivity extends AppCompatActivity {
public void onEnableAccClick(View view) {
startActivityForResult(new Intent(Settings.ACTION_ACCESSIBILITY_SETTINGS), 1);
}
}
