Develop Reference

How to enable vibration on touching every button in app

In my settings menu i have used a switch when i turn it on i want every button in-app to vibrate and when i turn the switch off i want every button in-the app to not vibrate.
The following is the code i have tried so far.
switch2!!.setOnCheckedChangeListener { buttonView, isChecked ->
if (switch2!!.isChecked) {
switch2!!.performHapticFeedback(HapticFeedbackConstants.VIRTUAL_KEY);
}
else {
vibrator.cancel()
}
}

You can do like this.
Using SharedPreference . https://developer.android.com/training/data-storage/shared-preferences
Once you stored the key, you can use the key at the other activity/fragment.
At onCreate , you get the value from SharedPreference.
You use variable to check it first before click the button.
If yes, then vibrate it. Refer to this. https://stackoverflow.com/a/52990380/9346054
**Don't forget to declare at AndroidManifest as the refer above.
<uses-permission android:name="android.permission.VIBRATE" />
Example.
Here at onCreate
val vibe = getSystemService(Context.VIBRATOR_SERVICE) as Vibrator
val isVibrate = sharedPref.getInt(getString(R.string.is_vibrate), defaultValue)
And then inside onClick button
if (isVisible) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
vibrator.vibrate(VibrationEffect.createOneShot(200, VibrationEffect.DEFAULT_AMPLITUDE))
} else {
vibrator.vibrate(200)
}
}

you need to add this permission first
<uses-permission android:name="android.permission.VIBRATE"/>
and next you can use this fun for vibrate mobile
fun vibratePhone(context: Context?, milliseconds: Int) {
val vibrator = context?.getSystemService(Context.VIBRATOR_SERVICE) as Vibrator
if (Build.VERSION.SDK_INT >= 26) {
vibrator.vibrate(
VibrationEffect.createOneShot(
milliseconds,
VibrationEffect.DEFAULT_AMPLITUDE
)
)
} else {
vibrator.vibrate(milliseconds)
}
}

How can I programmatically start an AccessibilityService?

I'm using an accessibility-service to check which application I'm using for-example I am using WhatsApp and I am trying to get its package name and compare it with my database if the package exists in my database then I'm closing the app so that I can't use this app, I just working on my idea. It's been days since I got this problem and I can't find the solutions to my problems can anyone help me. Thank you
The Problems that I am facing are listed below:
Accessibility service is automatically closing when I try to close my app. If I don't close the app it's working fine. For-example If I close my main application the service will turn off. Is there any way to stop that?
When I found the package name in my database what I'm doing is taking the user on the main screen "Home Page". That is not a good way to do it, can someone help me with this one. I need to properly block that app.
Is there any way to close the application which I am trying to block from recent apps?
My code is listed below:
Accessibility service class
override fun onServiceConnected() {
super.onServiceConnected()
val info = serviceInfo
info.eventTypes = AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED
info.flags = AccessibilityServiceInfo.DEFAULT
info.flags = AccessibilityServiceInfo.FLAG_INCLUDE_NOT_IMPORTANT_VIEWS
info.flags = AccessibilityServiceInfo.FLAG_REPORT_VIEW_IDS
info.flags = AccessibilityServiceInfo.FLAG_REQUEST_ENHANCED_WEB_ACCESSIBILITY
info.flags = AccessibilityServiceInfo.FLAG_RETRIEVE_INTERACTIVE_WINDOWS
info.feedbackType = AccessibilityServiceInfo.FEEDBACK_ALL_MASK
info.notificationTimeout = 100
info.packageNames = null
serviceInfo = info
}
override fun onAccessibilityEvent(event: AccessibilityEvent) {
if(AccessibilityEvent.eventTypeToString(event.eventType).contains("WINDOW")){
val nodeInfo = event.source
dfs(nodeInfo)
}
if (event.packageName != null) {
getAllBlockedApps(packageName = event.packageName.toString())
return
}
}
Block Application Code
val startMain = Intent(Intent.ACTION_MAIN)
startMain.addCategory(Intent.CATEGORY_HOME)
startMain.flags = Intent.FLAG_ACTIVITY_NEW_TASK
startMain.flags = Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS
startActivity(startMain)

isHardwareAccelerated() always returns false

I am trying to turn on hardware acceleration for my application
but I never seem to get a 'true' result from this function.
I tried all the methods in the Android Developers blog post about the
the tag android:hardwareAccelerated=true to the application
and even called
getWindow().setFlags(WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED,
WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED);

You should always call isHardwareAccelearted() after the view is attached to the window. I am not sure about your case as I can't see where actually you are calling it.
Also, the support level of various operations across API levels are mentioned here. I hope this helps.
You can also try this method to verify hardwareAcceleration.
public static boolean hasHardwareAcceleration(Activity activity) {
// Has HW acceleration been enabled manually in the current window?
Window window = activity.getWindow();
if (window != null) {
if ((window.getAttributes().flags
& WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED) != 0) {
return true;
}
}
// Has HW acceleration been enabled in the manifest?
try {
ActivityInfo info = activity.getPackageManager().getActivityInfo(
activity.getComponentName(), 0);
if ((info.flags & ActivityInfo.FLAG_HARDWARE_ACCELERATED) != 0) {
return true;
}
} catch (PackageManager.NameNotFoundException e) {
Log.e("Chrome", "getActivityInfo(self) should not fail");
}
return false;
}
For checking for View try this.
chat_wv.post(new Runnable() {
#Override
public void run() {
Log.e("isHardwareAccelerated", ""+chat_wv.isHardwareAccelerated());
}
});

Alternate to use Window inside Android Services

i would like to use following code to turn off Button back that i got from https://stackoverflow.com/a/4937448/1218762
final Window win = getWindow();
final WindowManager.LayoutParams winParams = win.getAttributes();
winParams.flags |= WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;
//set screen brightness to the lowest possible
winParams.screenBrightness = 0.01f;
if (Build.VERSION.SDK_INT < 8) {
// hack for pre-froyo to set buttonBrightness off
try {
Field buttonBrightness = winParams.getClass().getField(
"buttonBrightness");
buttonBrightness.set(winParams, 0);
} catch (Exception e) {
e.printStackTrace();
}
} else {
winParams.buttonBrightness = 0;
}
win.setAttributes(winParams);
Reference : visit Night Mode where you you can turn off Button Lights in Service , i know Services don't have Window but how is it possible ?
Thank You.

One of the simple way I would suggest you is to broadcast some kind of turning-off message from your Service to your Activity and perform the required actions inside onReceive method of BroadcastReceiver.

Turn off backlight of the buttons

I'm developing an Android application that might be used at night. Therefor, I need to turn off the buttons' backlight. How can I do this? On my own phone the backlight turns off after a while, but on the Motorola Droid I don't think this happens.
I'm using a wakelock to keep the screen on. Should I use another flag or how can I do this?
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
mWakeLock = pm.newWakeLock(PowerManager.SCREEN_DIM_WAKE_LOCK, WAKE_LOCK_TAG);
mWakeLock.acquire();
Thank you very much!
//Kaloer

There is a hack:
private void setDimButtons(boolean dimButtons) {
Window window = getWindow();
LayoutParams layoutParams = window.getAttributes();
float val = dimButtons ? 0 : -1;
try {
Field buttonBrightness = layoutParams.getClass().getField(
"buttonBrightness");
buttonBrightness.set(layoutParams, val);
} catch (Exception e) {
e.printStackTrace();
}
window.setAttributes(layoutParams);
}

I see that this is an old question that was mostly answered in a comment link, but to make it clear to anyone else who comes across this question, here's my own answer.
It's built-in since API 8. (doc)
float android.view.WindowManager.LayoutParams.buttonBrightness
This is a somewhat modified/simplified version of what I'm using in one of my apps (excluding irrelevant code). The inner class is required to prevent a crash at launch on older platforms that don't support it.
private void nightMode() {
Window win = getWindow();
LayoutParams lp = win.getAttributes();
if (prefs.getBoolean("Night", false))
changeBtnBacklight(lp, LayoutParams.BRIGHTNESS_OVERRIDE_OFF);
else changeBtnBacklight(lp, LayoutParams.BRIGHTNESS_OVERRIDE_NONE);
win.setAttributes(lp);
}
private void changeBtnBacklight(LayoutParams lp, float value) {
if (Integer.parseInt(Build.VERSION.SDK) >= 8) {
try {
new BtnBrightness(lp, value);
} catch (Exception e) {
Log.w(TAG, "Error changing button brightness");
e.printStackTrace();
}
}
}
private static class BtnBrightness {
BtnBrightness(LayoutParams lp, float v) {
lp.buttonBrightness = v;
}
}

AFAIK, there is no API to control the backlight of the buttons -- sorry!