我正在开发一个Android应用程序，该程序可用作后台服务，旨在记录所有触摸事件的坐标。我尝试了几种解决方案和建议，但是它们并没有达到我的目标。我定义了一个GlobalTouchService扩展服务实现View.OntouchListener。当应用程序在前台工作时，它可以工作，但是当其他应用程序在前台工作时，我想检测触摸事件。当其他应用程序在前台工作时，此解决方案始终返回零作为触摸坐标。

这是我的Mainactivity：

package com.token.simpledatabaseproject;

import android.annotation.SuppressLint;
import android.app.Service;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.PixelFormat;
import android.icu.text.AlphabeticIndex;
import android.os.Build;
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.LinearLayout;
import android.widget.LinearLayout.LayoutParams;

public class GlobalTouchService extends Service implements View.OnTouchListener {

WindowManager.LayoutParams params;

private String TAG = this.getclass().getSimpleName();
private WindowManager mWindowManager;
private LinearLayout touchLayout;

@Override
public IBinder onBind(Intent arg0) {
    return null;
}

@SuppressLint("ClickableViewaccessibility")
@Override
public void onCreate() {
    super.onCreate();
    touchLayout = new LinearLayout(this);
    LayoutParams lp = new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT);
    touchLayout.setLayoutParams(lp);       
    touchLayout.setBackgroundColor(Color.CYAN);
    touchLayout.setOnTouchListener(this);
    mWindowManager = (WindowManager) getSystemService(WINDOW_SERVICE);


    params = new WindowManager.LayoutParams(
            WindowManager.LayoutParams.WRAP_CONTENT,WindowManager.LayoutParams.WRAP_CONTENT,WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY,WindowManager.LayoutParams.flaG_NOT_FOCUSABLE
                    | WindowManager.LayoutParams.flaG_NOT_TOUCH_MODAL
                    | WindowManager.LayoutParams.flaG_WATCH_OUTSIDE_TOUCH
                    | WindowManager.LayoutParams.flaG_LAYOUT_NO_LIMITS,PixelFormat.TRANSLUCENT);

    params.gravity = Gravity.CENTER_HORIZONTAL | Gravity.TOP;
    params.x = 0;
    params.y = 100;
    WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE);
    wm.addView(touchLayout,params);

}

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

@Override
public boolean onTouch(View v,MotionEvent event) {
    Log.d("Touchhhhhhhhhhhhhh: ",String.valueOf(event.getX()) + String.valueOf(event.getY()));
    return true;
 }
}

这是我的GlobalTouchService：

package com.token.simpledatabaseproject;

import android.annotation.SuppressLint;
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.WindowManager;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;

public class GlobalTouchService extends Service implements View.OnTouchListener {

WindowManager.LayoutParams params;
private String TAG = this.getclass().getSimpleName();
private WindowManager mWindowManager;
private LinearLayout touchLayout;

@Override
public IBinder onBind(Intent arg0) {
    return null;
}

@SuppressLint("ClickableViewaccessibility")
@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(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT);
    touchLayout.setLayoutParams(lp);
    // set color if you want layout visible on screen
    touchLayout.setBackgroundColor(Color.CYAN);
    // set on touch listener
    touchLayout.setOnTouchListener(this);

    // fetch window manager object
    mWindowManager = (WindowManager) getSystemService(WINDOW_SERVICE);


    params = new WindowManager.LayoutParams(
            WindowManager.LayoutParams.WRAP_CONTENT,PixelFormat.TRANSLUCENT);


    params.gravity = Gravity.CENTER_HORIZONTAL | Gravity.TOP;
    params.x = 0;
    params.y = 100;
    WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE);
    wm.addView(touchLayout,params);

}


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

@Override
public boolean onTouch(View v,MotionEvent event) {

    Log.d("Touchhhhhhhhhhhhhh: ",String.valueOf(event.getX()) + String.valueOf(event.getY()));      
    return true;
 }
}