sistema - quitar notificacion sin servicio de datos android

Mostrar icono mientras la aplicación está en segundo plano. Androide

Question

Mi objetivo es crear una aplicación que, incluso si está en segundo plano. para ser más claro, te muestro algunos ejemplos de lo que obtendría. Es posible de hacer.

Answer 1

Usa este código

floatingBubble.java

package com.likith.floatingbubble;

import com.likith.gesturelauncherPro.R;
import com.likith.gesturelauncherPro.gestureDrawer;
import android.annotation.SuppressLint;
import android.app.Service;
import android.content.Intent;
import android.graphics.PixelFormat;
import android.os.IBinder;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewConfiguration;
import android.view.WindowManager;
import android.view.View.OnClickListener;
import android.view.WindowManager.LayoutParams;
import android.widget.ImageView;
public class FloatingFaceBubbleService extends Service 
{
    private WindowManager windowManager;
    private ImageView floatingFaceBubble;

    @SuppressLint("RtlHardcoded")
    public void onCreate() 
    {
        super.onCreate();
        floatingFaceBubble = new ImageView(this);
        floatingFaceBubble.setImageResource(R.drawable.ic_launcher); 
        windowManager = (WindowManager)getSystemService(WINDOW_SERVICE);

        final LayoutParams myParams = new WindowManager.LayoutParams(
            LayoutParams.WRAP_CONTENT,
            LayoutParams.WRAP_CONTENT,
            LayoutParams.TYPE_PHONE,
            LayoutParams.FLAG_NOT_FOCUSABLE,
            PixelFormat.TRANSLUCENT);

        myParams.gravity = Gravity.TOP | Gravity.LEFT;
        myParams.x=this.getResources().getDisplayMetrics().widthPixels;
        myParams.y=0;
        windowManager.addView(floatingFaceBubble, myParams);

        try
        {
            floatingFaceBubble.setOnTouchListener(new View.OnTouchListener()
            {
                @SuppressWarnings("unused")
                WindowManager.LayoutParams paramsT = myParams;
                private int initialX;
                private int initialY;
                private float initialTouchX;
                private float initialTouchY;
                private long touchStartTime = 0;
                @SuppressLint("ClickableViewAccessibility")
                @Override
                public boolean onTouch(View v, MotionEvent event) 
                {
                    if(System.currentTimeMillis()-touchStartTime>ViewConfiguration.getLongPressTimeout() && initialTouchX== event.getX())
                    {
                        windowManager.removeView(floatingFaceBubble);
                        stopSelf();
                        return false;

                    }

                    switch(event.getAction())
                    {                    
                        case MotionEvent.ACTION_DOWN:
                            touchStartTime = System.currentTimeMillis();
                            initialX = myParams.x;
                            initialY = myParams.y;
                            initialTouchX = event.getRawX();
                            initialTouchY = event.getRawY();
                            break;

                        case MotionEvent.ACTION_UP:
                            break;

                        case MotionEvent.ACTION_MOVE:
                            myParams.x = initialX + (int) (event.getRawX() - initialTouchX);
                            myParams.y = initialY + (int) (event.getRawY() - initialTouchY);
                            windowManager.updateViewLayout(v, myParams);
                            break;
                    }
                    return false;
                }
            });

            floatingFaceBubble.setOnClickListener(new OnClickListener() 
            {
                @Override
                public void onClick(View v) 
                {
                    //Toast.makeText(getApplicationContext(), "Clicked",Toast.LENGTH_LONG).show();
                    Intent myNewActivity = new Intent(getBaseContext(),gestureDrawer.class);
                    myNewActivity.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                    startActivity(myNewActivity);
                }
            });
        } catch (Exception e){
            e.printStackTrace();
        }
    }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub
        return null;
    }

}

LittleIcon.java

package com.likith.floatingbubble;

import com.likith.gesturelauncherPro.R;

import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Toast;

public class LittleIcon extends View
{
    private float viewX;
    private float viewY;
    private Paint mPaint;
    private Bitmap androidIcon;

    public LittleIcon(Context context)
    {
        super(context);
        mPaint = new Paint();
        mPaint.setColor(Color.BLACK);
        androidIcon = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
    }

    @Override
    public void onDraw(Canvas cvs) 
    {
        cvs.drawBitmap(androidIcon, viewX - androidIcon.getWidth() / 2, viewY - androidIcon.getHeight() / 2, mPaint);
    }

    @SuppressLint("ClickableViewAccessibility")
    @Override
    public boolean onTouchEvent(MotionEvent event) 
    {
        Toast.makeText(getContext(), "Clicked", Toast.LENGTH_LONG).show();
        boolean touchedX = Math.abs(viewX - event.getX()) > androidIcon.getWidth();
        boolean touchedY = Math.abs(viewY - event.getY()) > androidIcon.getHeight();
        boolean isValidTouch = !touchedX && !touchedY;
        if (isValidTouch)
        {
            if (event.getAction() == MotionEvent.ACTION_DOWN || event.getAction() == MotionEvent.ACTION_MOVE|| event.getAction() == MotionEvent.ACTION_UP) 
            {
                viewX = event.getX();
                viewY = event.getY();
            }
            invalidate();
            return true;

        }
        else
            return false;
    }

}

permisos

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
<service android:name="com.likith.floatingbubble.FloatingFaceBubbleService" />

Uso

    Intent intent = new Intent(mainActivity.this, com.likith.floatingbubble.FloatingFaceBubbleService.class);
startService(intent);

Answer 2

Puede agregar vista utilizando el método addView del administrador de ventanas, como la forma en que Facebook chathead se implementó. Consulte el enlace: what-apis-in-android-is-facebook-using-to-create-chat-heads