How to Simulate a Touch Event in Android

How can I reliably simulate touch events on Android without root (like Automate and Tasker)?

As suggested, the best way to simulate touch events since Nougat (API 24) is by using an accessibility service and the AccessibilityService#dispatchGesture method.

Here is how I did to simulate a single tap event.

// (x, y) in screen coordinates
private static GestureDescription createClick(float x, float y) {
    // for a single tap a duration of 1 ms is enough
    final int DURATION = 1;

    Path clickPath = new Path();
    clickPath.moveTo(x, y);
    GestureDescription.StrokeDescription clickStroke =
            new GestureDescription.StrokeDescription(clickPath, 0, DURATION);
    GestureDescription.Builder clickBuilder = new GestureDescription.Builder();
    clickBuilder.addStroke(clickStroke);
    return clickBuilder.build();
}

// callback invoked either when the gesture has been completed or cancelled
callback = new AccessibilityService.GestureResultCallback() {
    @Override
    public void onCompleted(GestureDescription gestureDescription) {
        super.onCompleted(gestureDescription);
        Log.d(TAG, "gesture completed");
    }

    @Override
    public void onCancelled(GestureDescription gestureDescription) {
        super.onCancelled(gestureDescription);
        Log.d(TAG, "gesture cancelled");
    }
};

// accessibilityService: contains a reference to an accessibility service
// callback: can be null if you don't care about gesture termination
boolean result = accessibilityService.dispatchGesture(createClick(x, y), callback, null);
Log.d(TAG, "Gesture dispatched? " + result);

To perform other gestures, you might find useful the code used for testing the AccessibilityService#dispatchGesture implementation.

EDIT: I link a post in my blog with an introduction to Android accessibility services.

How to programmatically trigger the touch event in android?

// Obtain MotionEvent object
long downTime = SystemClock.uptimeMillis();
long eventTime = SystemClock.uptimeMillis() + 100;
float x = 0.0f;
float y = 0.0f;
// List of meta states found here:     developer.android.com/reference/android/view/KeyEvent.html#getMetaState()
int metaState = 0;
MotionEvent motionEvent = MotionEvent.obtain(
    downTime, 
    eventTime, 
    MotionEvent.ACTION_UP, 
    x, 
    y, 
    metaState
);

// Dispatch touch event to view
view.dispatchTouchEvent(motionEvent);

How to simulate touch from background service with sendevent or other way?

I can't execute the "sendevent" command, but found another way for myself, hope it will be helpfull for somebody.

For simulate touch I used sendPointerSync() from android.app.Instrumentation, that work only with "android.permission.INJECT_EVENTS" permission. For use it you should compile your app as a system app.
To do it you should follow next steps:

1. Getting files from android source:

   root-of-android-source-tree/out/host//framework/signapk.jar

   root-of-android-source-tree/build/target/product/security/platform.x509.pem

   root-of-android-source-tree/build/target/product/security/platform.pk8

2. sign your app using getting files:

   Command "java -jar signapk.jar platform.x509.pem platform.pk8 YourApp-unsigned.apk" YourApp-signed.apk.

3. adb install YourApp-signed.apk
   
   
   • Run your app
   • Use "adb shell ps" to confirm that your app is running as system.

Code with touch simulating(new thread is necessary for simulation):

Thread thread = new Thread(){
       @Override
       public void run(){
               Instrumentation m_Instrumentation = new Instrumentation();

               m_Instrumentation.sendPointerSync(MotionEvent.obtain(
                       SystemClock.uptimeMillis(),
                       SystemClock.uptimeMillis(),
                       MotionEvent.ACTION_DOWN,posx, posy, 0));
               m_Instrumentation.sendPointerSync(MotionEvent.obtain(
                       SystemClock.uptimeMillis(),
                       SystemClock.uptimeMillis(),
                       MotionEvent.ACTION_UP,width*4/5,height, 0));
       }
   };

Manifest:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.yourapp"
    **android:sharedUserId="android.uid.system"**
    android:versionCode="1"
    android:versionName="1.0" >

Using resources:

• Programmatically Injecting Events on Android – Part 1
• How to compile Android Application with system permissions
• Instruction for compile here

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