Android -showing alert dialog from service when phone is locked

问题

Showing alert dialog on lock screen from service is my problem. when phone is on unlock state ,it shows nicely. Actually if phone is lock , it will just unlock phone and alert dialog will appears behind lock. Here is my code:

Service.java:

public static void popupDialog(String sender , String msg)
{
    final String senderName = sender;
    final String message = msg;
    Handler h = new Handler(context.getMainLooper());
    h.post(new Runnable() {
        @Override
        public void run() {
            KeyguardManager km = (KeyguardManager) context.getSystemService(Context.KEYGUARD_SERVICE);

            if (km.inKeyguardRestrictedInputMode())
            {
                lockFlag = true;
                Log.d ("---popup","lock");
                powerManager = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
                km = (KeyguardManager) context.getSystemService(Context.KEYGUARD_SERVICE);
                mKeyguardLock = km.newKeyguardLock("com.example.myapplication");
                mKeyguardLock.disableKeyguard();
                wl = powerManager.newWakeLock(PowerManager.FULL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP | PowerManager.ON_AFTER_RELEASE, "com.example.myapplication");
                wl.acquire();
            }
            else
            {
                Log.d ("---popup","unlock");
            }
            final View view = View.inflate(context.getApplicationContext(),R.layout.popup, null);
            final AlertDialog.Builder builder1 = new AlertDialog.Builder(context)
                .setCancelable(true)
                .setView(view);
            final ImageView ImageView1 = (ImageView) view.findViewById(R.id.ImageView1);
            final TextView TextView1 = (TextView) view.findViewById(R.id.TextView1);
            final TextView TextViewSender = (TextView) view.findViewById(R.id.TextViewSender);
            TextViewSender.setText (senderName+":");
            final TextView TextView2 = (TextView) view.findViewById(R.id.TextView2);
            TextView2.setText (message);
            final EditText EditText1 = (EditText) view.findViewById(R.id.EditText1);

            final ImageButton ImageButton1 = (ImageButton) view.findViewById(R.id.ImageButton1);
            ImageButton1.setOnClickListener( new OnClickListener() {
                @Override
                public void onClick(View v) {
                /*do some task*/
                    }
                }
            });
            AlertDialog alertDialog = builder1.create();
            alertDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
            alertDialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
            alertDialog.show();
        }
    });
}

I just want to show alert dialog on lock.

EDITED : I use Android Lolipop, and after read this link , I used TYPE_SYSTEM_OVERLAY instead of TYPE_SYSTEM_ALERT. In this situation, I cannot type on EditText or even close dialog.

回答1:

Change the type to TYPE_SYSTEM_ERROR

Change

alertDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);

to

alertDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ERROR);

Update:

TYPE_SYSTEM_ALERT - Window type: system window, such as low power alert. These windows are always on top of application windows. In multiuser systems shows only on the owning user's window. Constant Value: 2003 (0x000007d3)

TYPE_SYSTEM_ERROR - Window type: internal system error windows, appear on top of everything they can. In multiuser systems shows only on the owning user's window. Constant Value: 2010 (0x000007da)

More info is here

来源：https://stackoverflow.com/questions/35125925/android-showing-alert-dialog-from-service-when-phone-is-locked