Develop Reference

Pose detection from a gallery video

i'm trying to run ML Kit pose detection on a video from the phone gallery by using the following code (i tried to follow the documentation Detect Poses with ML KIT):
public class MainActivity extends AppCompatActivity {
Button pick;
#Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
pick = findViewById(R.id.elegir);
videoView = findViewById(R.id.video);
mc = new MediaController(MainActivity.this);
videoView.setMediaController(mc);
pick.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v){
Intent pickintent = new Intent(Intent.ACTION_GET_CONTENT);
pickintent.setType("video/*");
startActivityForResult(pickintent, 1);
}
});
}
#Override
public void onActivityResult(int requestcode, int resultcode, Intent data){
super.onActivityResult(requestcode, resultcode, data);
if(requestcode == 1 ){
Uri videouri = data.getData();
PoseDetectorOptions options =
new PoseDetectorOptions.Builder()
.setDetectorMode(PoseDetectorOptions.STREAM_MODE)
.build();
PoseDetector poseDetector = PoseDetection.getClient(options);
InputImage image = null;
try {
image = InputImage.fromFilePath(getApplicationContext(), videouri);
} catch (IOException e) {
e.printStackTrace();
}
Task<Pose> result =
poseDetector.process(image)
.addOnSuccessListener(
new OnSuccessListener<Pose>() {
#Override
public void onSuccess(Pose pose) {
// Task completed successfully
// ...
}
})
.addOnFailureListener(
new OnFailureListener() {
#Override
public void onFailure(#NonNull Exception e) {
// Task failed with an exception
// ...
}
});
}
}
}
Error log:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.mlkit, PID: 11193
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=Intent { dat=content://com.android.providers.media.documents/document/video:31 flg=0x1 }} to activity {com.example.mlkit/com.example.mlkit.MainActivity}: java.lang.NullPointerException: InputImage can not be null
at android.app.ActivityThread.deliverResults(ActivityThread.java:5015)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:5056)
at android.app.servertransaction.ActivityResultItem.execute(ActivityResultItem.java:51)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
Caused by: java.lang.NullPointerException: InputImage can not be null
at com.google.android.gms.common.internal.Preconditions.checkNotNull(com.google.android.gms:play-services-basement##17.6.0:2)
at com.google.mlkit.vision.common.internal.MobileVisionBase.processBase(com.google.mlkit:vision-common##16.5.0:11)
at com.google.mlkit.vision.pose.internal.PoseDetectorImpl.process(com.google.mlkit:pose-detection-common##17.1.0-beta3:2)
at com.example.mlkit.MainActivity.onActivityResult(MainActivity.java:93)
at android.app.Activity.dispatchActivityResult(Activity.java:8310)
at android.app.ActivityThread.deliverResults(ActivityThread.java:5008)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:5056) 
at android.app.servertransaction.ActivityResultItem.execute(ActivityResultItem.java:51) 
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) 
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066) 
at android.os.Handler.dispatchMessage(Handler.java:106) 
at android.os.Looper.loop(Looper.java:223) 
at android.app.ActivityThread.main(ActivityThread.java:7656) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947) 
I would like to know the proper way to run pose detection in this context. I understand something is going wrong with the InputImage, but i dont know how to fix it

The class is called InputImage instead of InputVideo, so when you use fromFilePath, it expects a file for image instead of video.
Here are some answers on Github about using video file as input: https://github.com/googlesamples/mlkit/issues?q=is%3Aissue+in%3Atitle+%22video+file%22+
Basically, you will need to break the video into separate frames and construct InputImage for each frame.

No subscribers registered for event class org.greenrobot.eventbus.SubscriberExceptionEvent

Why the debug was giving me this?
everything is works fine i just did not understand why Eventbus giving me this??
can someone please help me? so much thanks
it just bothering me that i have a problem with my codess
This is the Log.
E/EventBus: Could not dispatch event: class
com.creamydark.Izone.JoYuri.YuriActionMessage to subscribing class
class com.creamydark.musilization.MainActivity
java.lang.IndexOutOfBoundsException: Index: 5, Size: 5
at java.util.ArrayList.get(ArrayList.java:437)
at com.ashokvarma.bottomnavigation.BottomNavigationBar.selectTabInternal(BottomNavigationBar.java:530)
at com.ashokvarma.bottomnavigation.BottomNavigationBar.selectTab(BottomNavigationBar.java:477)
at com.ashokvarma.bottomnavigation.BottomNavigationBar.selectTab(BottomNavigationBar.java:467)
at com.creamydark.musilization.MainActivity.onPageSelected(MainActivity.java:455)
at androidx.viewpager.widget.ViewPager.dispatchOnPageSelected(ViewPager.java:1941)
at androidx.viewpager.widget.ViewPager.scrollToItem(ViewPager.java:686)
at androidx.viewpager.widget.ViewPager.setCurrentItemInternal(ViewPager.java:670)
at androidx.viewpager.widget.ViewPager.setCurrentItemInternal(ViewPager.java:631)
at androidx.viewpager.widget.ViewPager.setCurrentItem(ViewPager.java:612)
at com.creamydark.musilization.MainActivity.eventMessage(MainActivity.java:204)
at java.lang.reflect.Method.invoke(Native Method)
at org.greenrobot.eventbus.EventBus.invokeSubscriber(EventBus.java:510)
at org.greenrobot.eventbus.EventBus.postToSubscription(EventBus.java:433)
at org.greenrobot.eventbus.EventBus.postSingleEventForEventType(EventBus.java:414)
at org.greenrobot.eventbus.EventBus.postSingleEvent(EventBus.java:387)
at org.greenrobot.eventbus.EventBus.post(EventBus.java:268)
at org.greenrobot.eventbus.EventBus.postSticky(EventBus.java:309)
at com.creamydark.musilization.BottomNavFragments.DetailSelectedAlphaFragment$1.onPostExecute(DetailSelectedAlphaFragment.java:111)
at com.creamydark.musilization.BottomNavFragments.DetailSelectedAlphaFragment$1.onPostExecute(DetailSelectedAlphaFragment.java:106)
at android.os.AsyncTask.finish(AsyncTask.java:771)
at android.os.AsyncTask.access$900(AsyncTask.java:199)
at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:788)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7660)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
D/EventBus: No subscribers registered for event class
org.greenrobot.eventbus.SubscriberExceptionEvent
This is my Subscriber from MainActivity.
#Subscribe(sticky = true )
public void eventMessage(YuriActionMessage message){
if (message.getAction() == "LOAD_PLAYER_UI") {
load_ExoPlayerUI();
} else if (message.getAction() == "LOAD_PLAYER_UI_PLAYPAUSE") {
load_PlayPauseBtn();
} else if (message.getAction() == "SET_CURRENT_VIEWPAGER_ITEM_DETAILFRAG") {
mact_IzoneVIewPager.setCurrentItem(5);
//EventBus.getDefault().removeStickyEvent(true);
} else if (message.getAction() == "SET_CURRENT_VIEWPAGER_ITEM_ALBUMFRAG") {
mact_IzoneVIewPager.setCurrentItem(1);
//EventBus.getDefault().removeStickyEvent(true);
}
}
This is the postEvent in my Fragment Attatch from MainActivity
public void initTrackModelList(long albumid){
IzoneGetTracksByAlbum izoneGetTracksByAlbum=new IzoneGetTracksByAlbum(this.getActivity(),albumid){
#Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
initRecyclerView();
EventBus.getDefault().postSticky(new YuriActionMessage("SET_CURRENT_VIEWPAGER_ITEM_DETAILFRAG"));
}
};
izoneGetTracksByAlbum.execute(mTrackModel);
}
this is my Event Message Model.
public class YuriActionMessage {
private String Action;
public YuriActionMessage(String action){
this.Action=action;
}
public String getAction() {
return Action;
}
public void setAction(String action) {
Action = action;
}
}

It's not about Eventbus. Sometimes errors in your code are thrown as Eventbus exceptions. Check your code. For example:
mact_IzoneVIewPager.setCurrentItem(5);

Android back navigation leads to crash on activity based on intent [closed]

Closed. This question needs debugging details. It is not currently accepting answers.
Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question.
Closed 2 years ago.
Improve this question
I have an android app with three activities A, B, and C. B starts with a necessary intent form A and from B I can startActivity C. But when I use the back button on the action bar to go back from C to B, the app crashes because B received no intent. How to solve this.
Code for Activity B, getting intent from Activity A. It is important to have this intent for the activity B to function.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_parking_spot);
getSupportActionBar().hide();
spot = getIntent().getParcelableExtra("spot");
init();
}
private void init() {
days = findViewById(R.id.spot_days);
rate = findViewById(R.id.spot_rate);
timing = findViewById(R.id.spot_timing);
name = findViewById(R.id.spot_name);
address = findViewById(R.id.spot_address);
spots = findViewById(R.id.spot_spots);
// This is where null pointer exception is thrown on accessing spot variable
name.setText(spot.getName());
address.setText(spot.getAddress());
timing.setText(spot.getTiming());
String temp = getResources().getString(R.string.rs) + " " + spot.getRate() + "/HR";
rate.setText(temp);
temp = spot.getDays();
for (int i = 0; i < temp.length(); i++) {
if (temp.charAt(i) == 'T') {
setDay(i);
}
}
FirebaseDatabase.getInstance().getReference(spot.getPath()).child("spots").addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
long total = dataSnapshot.getChildrenCount(), free = 0;
for (DataSnapshot shot : dataSnapshot.getChildren()) {
Log.v("Spot", shot.child("status").getValue(Integer.class) + "");
if (shot.child("status").getValue(Integer.class) == 0) {
free++;
}
}
String temp = free + "/" + total;
spots.setText(temp);
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
findViewById(R.id.navigate_spot).setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Uri gmmIntentUri = Uri.parse("google.navigation:q=" + spot);
Intent mapIntent = new Intent(Intent.ACTION_VIEW, gmmIntentUri);
mapIntent.setPackage("com.google.android.apps.maps");
if (mapIntent.resolveActivity(getPackageManager()) != null) {
startActivity(mapIntent);
}
}
});
findViewById(R.id.book_now).setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(ParkingSpotActivity.this, BookingActivity.class);
intent.putExtra("spot", spot);
startActivity(intent);
}
});
setupSlider();
}
Going to C from B
confirm.setOnClickListener(v -> {
Intent intent = new Intent(getApplicationContext(), CheckoutActivity.class);
intent.putExtra("spot", parkingSpot);
intent.putExtra("pos", pos);
startActivity(intent);
});
Now app has opened activity C. Clicking on the back arrow icon in Activity B to C leads to an error as B loses its intent data
Erro from debugger when i press back button
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.mobile.solutions.parking, PID: 26598
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mobile.solutions.parking/com.mobile.solutions.parking.activity.ParkingSpotActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String com.mobile.solutions.parking.model.ParkingSpot.getName()' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3374)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3513)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2109)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7682)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:516)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:950)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String com.mobile.solutions.parking.model.ParkingSpot.getName()' on a null object reference
at com.mobile.solutions.parking.activity.ParkingSpotActivity.init(ParkingSpotActivity.java:59)
at com.mobile.solutions.parking.activity.ParkingSpotActivity.onCreate(ParkingSpotActivity.java:47)
at android.app.Activity.performCreate(Activity.java:7815)
at android.app.Activity.performCreate(Activity.java:7804)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1318)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3349)
The only point is that B to C works fine but not vice versa. This I think is because B doesn't retain its intent data

In the OnCreate method add this:
if (getSupportActionBar() != null)
{
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}
Then add this method:
#Override
public boolean onSupportNavigateUp() {
onBackPressed();
return true;
}

You can use MVVM, Moxy MVP structure or savedInstance to store your data and use it. When you back from C to B it will use one of this data store algorithm and you will not get crashed. So, check every time
if (savedInstance != null ){
spot = savedInstance.getParcelable("spot");
} else {
spot = getIntent().getParcelableExtra("spot");
}

RuntimeException: Unable to start activity for retrofit in main activity in android

hi i'm a bit new to android studio
i'm coding with java and i need help, the thing is that when i put my retrofit codes to Call in mainactivity it won't response;here's my code in Mainactivity how ever I put my codes it gives me these errors in build.
oh and I have already googled it but couldn't find cananyone help please,thanks.
Mainactivity:
public class MainActivity extends ParentActivity {
Call<HealthServices>call;
final String TAG="here";
ArrayList<HealthServices> healthServices;
Button btn_signin, btn_signup;
EditText enter_eamil, enter_pass;
public static final String MY_PREFS_NAME = "MyPrefsFile";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if(!getUserHelper().hasUser()){
openActivity(Activity_Register.class, true);
} else {
openActivity(HomeActivity.class, true);
}
// test kon
init();
login();
register();
HealthServices healthServices=APIUtils.getHealthServices();
Call<HList>call=healthServices.getInfoo("JSON","");
Log.d(TAG, "onResponse: "+"TEST");
call.enqueue(new Callback<HList>() {
#Override
public void onResponse(Call<HList> call, Response<HList> response) {
HList hList=response.body();
}
#Override
public void onFailure(Call<HList> call, Throwable t) {
Log.d(TAG+" ERROR", t.getMessage());
}
});
}
private void register() {
btn_signup.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(getApplicationContext(), Activity_Register.class);
startActivity(intent);
}
});
}
private void login() {
btn_signin.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String mainPass = enter_pass.getText().toString().trim();
String mainMail = enter_eamil.getText().toString().trim();
if (isValidInput(mainMail, mainPass)) {
Intent intent = new Intent(getApplicationContext(), HomeActivity.class);
startActivity(intent);
finish();
}
}
});
}
private void init() {
btn_signin = findViewById(R.id.main_btn_signin);
btn_signup = findViewById(R.id.main_btn_signup);
enter_eamil = findViewById(R.id.main_et);
enter_pass = findViewById(R.id.main_pass);
}
private boolean isValidInput(String mail, String pass) {
//get data of memory
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
SharedPreferences prefs = getSharedPreferences(MY_PREFS_NAME, MODE_PRIVATE);
String emails = prefs.getString("EMAIL", "");
String pass1 = prefs.getString("PASS", "");
if (isEmpty(mail)) {
return false;
}
if (isEmpty(pass)) {
return false;
}
if (!mail.equals(emails)) {
return false;
}
if (!pass.equals(pass1)) {
return false;
}
return true;
}
}
and heres's my errors comes up in build:
02/22 22:20:16: Launching 'app' on Pixel 2 API 29.
$ adb shell am start -n "com.example.najmidpi/com.example.najmidpi.activity.MainActivity" -a
android.intent.action.MAIN -c android.intent.category.LAUNCHER
Waiting for process to come online...
Connected to process 30993 on device 'Pixel_2_API_29 [emulator-5554]'.
Capturing and displaying logcat messages from application. This behavior can be disabled in the
"Logcat output" section of the "Debugger" settings page.
D/libEGL: Emulator has host GPU support, qemu.gles is set to 1.
W/RenderThread: type=1400 audit(0.0:114): avc: denied { write } for name="property_service"
dev="tmpfs" ino=849 scontext=u:r:untrusted_app_27:s0:c134,c256,c512,c768
tcontext=u:object_r:property_socket:s0 tclass=sock_file permissive=0
W/libc: Unable to set property "qemu.gles" to "1": connection failed; errno=13 (Permission
denied)
D/libEGL: loaded /vendor/lib/egl/libEGL_emulation.so
D/libEGL: loaded /vendor/lib/egl/libGLESv1_CM_emulation.so
D/libEGL: loaded /vendor/lib/egl/libGLESv2_emulation.so
W/xample.najmidp: Accessing hidden method Landroid/view/View;-
>computeFitSystemWindows(Landroid/graphics/Rect;Landroid/graphics/Rect;)Z (greylist, reflection,
allowed)
W/xample.najmidp: Accessing hidden method Landroid/view/ViewGroup;-
>makeOptionalFitsSystemWindows()V (greylist, reflection, allowed)
D/AndroidRuntime: Shutting down VM
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.najmidpi, PID: 30993
java.lang.RuntimeException: Unable to start activity
ComponentInfo{com.example.najmidpi/com.example.najmidpi.activity.MainActivity}:
java.lang.IllegalArgumentException: baseUrl must end in /: http://teslam.ir/json%20files
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3270)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
Caused by: java.lang.IllegalArgumentException: baseUrl must end in /: http://teslam.ir/json%20files
at retrofit2.Retrofit$Builder.baseUrl(Retrofit.java:527)
at retrofit2.Retrofit$Builder.baseUrl(Retrofit.java:470)
at com.example.najmidpi.retrofit.remote.RetroClient.getClient(RetroClient.java:18)
at com.example.najmidpi.retrofit.remote.APIUtils.getHealthServices(APIUtils.java:12)
at com.example.najmidpi.activity.MainActivity.onCreate(MainActivity.java:56)
at android.app.Activity.performCreate(Activity.java:7802)
at android.app.Activity.performCreate(Activity.java:7791)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1299)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3245)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409) 
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83) 
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) 
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016) 
at android.os.Handler.dispatchMessage(Handler.java:107) 
at android.os.Looper.loop(Looper.java:214) 
at android.app.ActivityThread.main(ActivityThread.java:7356) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930) 
Process 30993 terminated.
and the Logcat is clear.
what should I do?Can someone tell plz?

The message looks quite clear to me
http://teslam.ir/json%20files
Basically you have to add a /
as so:
http://teslam.ir/json%20files/
the place should be where you have the Call or Observe interface, is called an endpoint

FlashLight App Fail to connect to camera service

Here Is my Code:
I have Added a github Permission code But it still Crashes
I have done every thing but it crashes Every Time
I also have added Permission for Camera in my manifest
parameter = camera.getParameters();
}
#Override public void onPermissionDenied(PermissionDeniedResponse response) {
Toast.makeText(getApplicationContext(), "Permission Denied", Toast.LENGTH_SHORT).show();
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setMessage("App needs permission to access camera")
.setPositiveButton("Granted", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Intent myAppSettings = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS, Uri.parse("package:" + getPackageName()));
myAppSettings.addCategory(Intent.CATEGORY_DEFAULT);
myAppSettings.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(myAppSettings);
}
}).setNegativeButton("Denied", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
}
}).create().show();
}
#Override public void onPermissionRationaleShouldBeShown(PermissionRequest permission, PermissionToken token)
{[enter image description here][1]
token.continuePermissionRequest();
}
}).check();
//getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
textview = (TextView) findViewById(R.id.textView);
flashLight = (ImageButton) findViewById(R.id.flash_light);
// setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
//askPermission(CAMERA,camera1);
flashLight.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (!isFlashLightOn) {
turnOnTheFlash();
} else {
turnOffTheFlash();
}
}
});
logCat:
09-30 18:59:31.698 11339-11339/inducesmile.com.androidflashlightapp E/AndroidRuntime: FATAL EXCEPTION: main
Process: inducesmile.com.androidflashlightapp, PID: 11339
java.lang.RuntimeException: Unable to resume activity {inducesmile.com.androidflashlightapp/inducesmile.com.androidflashlightapp.MainActivity}: java.lang.RuntimeException: Fail to connect to camera service
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3506)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3546)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2795)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1527)
at android.os.Handler.dispatchMessage(Handler.java:110)
at android.os.Looper.loop(Looper.java:203)
at android.app.ActivityThread.main(ActivityThread.java:6251)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1073)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:934)
Caused by: java.lang.RuntimeException: Fail to connect to camera service
at android.hardware.Camera.(Camera.java:647)
at android.hardware.Camera.open(Camera.java:510)
at inducesmile.com.androidflashlightapp.MainActivity.turnOffTheFlash(MainActivity.java:105)
at inducesmile.com.androidflashlightapp.MainActivity.onResume(MainActivity.java:165)
at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1269)
at android.app.Activity.performResume(Activity.java:6791)
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3477)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3546) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2795) 
at android.app.ActivityThread.-wrap12(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1527) 
at android.os.Handler.dispatchMessage(Handler.java:110) 
at android.os.Looper.loop(Looper.java:203) 
at android.app.ActivityThread.main(ActivityThread.java:6251) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1073) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:934) 
09-30 18:59:31.804 11339-11347/inducesmile.com.androidflashlightapp I/art: Enter while loop.

I also had created a flashlight sensor based app a few months back. I have created gist for the code of the flashlight activity (both java and xml) and it seems to be working fine. Take a look at the below links and see if it helps:
https://gist.github.com/robillo/b27d37be3262164ee7f5532230c28c5a
https://gist.github.com/robillo/71afef65923138ed9d6011e3bd216249
Also, try doing your processing part of the activity in the if block in onCreate() like:
askForPermissions();
if(checkForPermission()){
//Do your processing here
}
The functions are:
void askForPermissions(){
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if(getActivity().checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE)!= PackageManager.PERMISSION_GRANTED){
getActivity().requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_EXTERNAL_STORAGE}, PERMISSION_REQUEST_CODE);
}
}
}
boolean checkForPermission(){
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.M;
}

It's tough to tell without seeing your turnOnTheFlash and turnOffTheFlash functions, but I'd guess that you are not properly releasing the camera at some point as shown by the documentation.