Notes

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="150dp"
android:layout_height="150dp"
android:padding="10dp"
tools:context=".MainActivity" >

<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:text="Start"
android:onClick="buttonClicked" />

</RelativeLayout>




-----
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.tasarhane.touchlisten">

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
<uses-permission android:name="android.permission.GET_TASKS" />

<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
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="GlobalTouchService" >
</service>

</application>

</manifest>


-----
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity {

Intent globalService;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

globalService = new Intent(this,GlobalTouchService.class);
startService(globalService);
}

public void buttonClicked(View v){

if(v.getTag() == null){
startService(globalService);
v.setTag("on");
((Button)v).setText("Stop Service");
Toast.makeText(this, "Start Service", Toast.LENGTH_SHORT).show();
}
else{
stopService(globalService);
v.setTag(null);
((Button)v).setText("Start Service");
Toast.makeText(this, "Stop Service", Toast.LENGTH_SHORT).show();
}

}
}







-----
import android.app.Service;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.PixelFormat;
import android.os.IBinder;
import android.util.Log;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;
import android.widget.Toast;

public class GlobalTouchService extends Service implements OnTouchListener{

private String TAG = this.getClass().getSimpleName();
// window manager
private WindowManager mWindowManager;
// linear layout will use to detect touch event
private LinearLayout touchLayout;
@Override
public IBinder onBind(Intent arg0) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
// create linear layout
touchLayout = new LinearLayout(this);
// set layout width 30 px and height is equal to full screen
LayoutParams lp = new LayoutParams(50, 50);
touchLayout.setLayoutParams(lp);
// set color if you want layout visible on screen
touchLayout.setBackgroundColor(Color.CYAN);
touchLayout.setAlpha((float) 0.2);
// set on touch listener
touchLayout.setOnTouchListener(this);

Button btnTag = new Button(this);
btnTag.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
btnTag.setText("Durdur");
//add button to the layout
touchLayout.addView(btnTag);


btnTag.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mWindowManager.removeView(touchLayout);
}
});



// fetch window manager object
mWindowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
// set layout parameter of window manager
WindowManager.LayoutParams mParams = new WindowManager.LayoutParams(
50, // width of layout 30 px
50, // height is equal to full screen
WindowManager.LayoutParams.TYPE_PHONE, // Type Ohone, These are non-application windows providing user interaction with the phone (in particular incoming calls).
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE, // this window won't ever get key input focus
PixelFormat.TRANSLUCENT);
mParams.gravity = Gravity.LEFT | Gravity.TOP;
Log.i(TAG, "add View");

mWindowManager.addView(touchLayout, mParams);
}


@Override
public void onDestroy() {
if(mWindowManager != null) {
if(touchLayout != null) mWindowManager.removeView(touchLayout);
}
super.onDestroy();
}

@Override
public boolean onTouch(View v, MotionEvent event) {
if(event.getAction() == MotionEvent.ACTION_DOWN || event.getAction() == MotionEvent.ACTION_UP)
Log.i(TAG, "Action :" + event.getAction() + "t X :" + event.getRawX() + "t Y :"+ event.getRawY());
Toast.makeText(this, (int)event.getX() + " " + (int)event.getY(), Toast.LENGTH_SHORT).show();
return true;
}

}