为什么不帮助任何人？
在我的应用程序中，我想开发屏幕录像机，为此，我使用service。在我的service中，我有一个按钮，当单击此按钮时，停止此service，然后打开我的activities。我编写以下代码并为我工作，但是在Android 9中，当单击停止按钮时，关闭了我的应用程序（service），但没有打开我的activity！我添加了FireBase crashlytics，但是对于此问题，不向我发送任何问题！我认为这个问题仅用于Android9！
我的录音机服务等级代码：
public class FloatingLayoutService extends Service implements StepperFormListener {
private WindowManager windowManager;
private ConstraintLayout floatingLayout, floatingLay_root, floatingLay_main;
private IBinder binder = new ServiceBinder();
private LinearLayout floatingLay_headerLay, floatingLay_emptyStepLay;
private ImageView floatingLay_pauseImg, floatingLay_goneImg, floatingLay_emptyImg;
private Chronometer chronometer;
private TextView floatingLay_tasksTxt, floatingLay_infoTxt, floatingLay_infoContentTxt, floatingLay_infoContentNextPage,
floatingLay_emptyStepFinish;
private RelativeLayout floatingLay_content, floatingLay_step2ContentLay;
private VerticalStepperFormView floatingLay_stepper;
private ScrollView floatingLay_infoContentScroll;
private List<Step> steps = new ArrayList();
private List<Integer> intList = new ArrayList<>();
private List<TestStepsListResponse.Datum> testPlans = new ArrayList<>();
private StringBuilder stringBuilder;
//private WatermarkService watermarkService;
private boolean isBound = false;
private LayoutInflater layoutInflater;
//Timer
private boolean running;
private int stepIndex = 1;
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
//Inflate the layout using LayoutInflater
layoutInflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
floatingLayout = (ConstraintLayout) layoutInflater.inflate(R.layout.service_floating_layout, null);
//Init views
stringBuilder = new StringBuilder();
floatingLay_root = floatingLayout.findViewById(R.id.floatingLay_root);
floatingLay_main = floatingLayout.findViewById(R.id.floatingLay_main);
floatingLay_emptyImg = floatingLayout.findViewById(R.id.floatingLay_emptyImg);
floatingLay_headerLay = floatingLayout.findViewById(R.id.floatingLay_headerLay);
floatingLay_pauseImg = floatingLay_headerLay.findViewById(R.id.floatingLay_pauseImg);
floatingLay_goneImg = floatingLay_headerLay.findViewById(R.id.floatingLay_goneImg);
chronometer = floatingLay_headerLay.findViewById(R.id.floatingLay_timerTxt);
floatingLay_tasksTxt = floatingLay_headerLay.findViewById(R.id.floatingLay_tasksTxt);
floatingLay_infoTxt = floatingLay_headerLay.findViewById(R.id.floatingLay_infoTxt);
floatingLay_content = floatingLayout.findViewById(R.id.floatingLay_content);
floatingLay_stepper = floatingLay_content.findViewById(R.id.floatingLay_stepper);
floatingLay_emptyStepLay = floatingLay_content.findViewById(R.id.floatingLay_emptyStepLay);
floatingLay_step2ContentLay = floatingLay_content.findViewById(R.id.floatingLay_step2ContentLay);
floatingLay_emptyStepFinish = floatingLay_content.findViewById(R.id.floatingLay_emptyStepFinish);
floatingLay_infoContentTxt = floatingLay_content.findViewById(R.id.floatingLay_infoContentTxt);
floatingLay_infoContentNextPage = floatingLay_content.findViewById(R.id.floatingLay_infoContentNextPage);
floatingLay_infoContentScroll = floatingLay_content.findViewById(R.id.floatingLay_infoContentScroll);
//Set layout params to display the controls over any screen.
int LAYOUT_FLAG;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
LAYOUT_FLAG = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
} else {
LAYOUT_FLAG = WindowManager.LayoutParams.TYPE_PHONE;
}
final WindowManager.LayoutParams params = new WindowManager.LayoutParams(
WindowManager.LayoutParams.MATCH_PARENT,
WindowManager.LayoutParams.MATCH_PARENT,
LAYOUT_FLAG,
0,
PixelFormat.TRANSLUCENT);
// From API26, TYPE_PHONE deprecated. Use TYPE_APPLICATION_OVERLAY for O
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O)
params.type = WindowManager.LayoutParams.TYPE_PHONE;
//Initial position of the floating controls
params.gravity = Gravity.BOTTOM | Gravity.START;
params.x = 0;
params.y = 0;
//Add the controls view to windowManager
windowManager.addView(floatingLayout, params);
//Start timer
timerMethod();
//Stop service
floatingLay_goneImg.setOnClickListener(v -> toggleLay(false));
//Header layout
if (stepIndex == 1) {
changeHeaderLayouts(INFO);
stepIndex = 2;
} else {
changeHeaderLayouts(TASKS);
}
//Change layouts
floatingLay_infoTxt.setOnClickListener(v -> changeHeaderLayouts(INFO));
floatingLay_tasksTxt.setOnClickListener(v -> changeHeaderLayouts(TASKS));
//Click
floatingLay_emptyImg.setOnClickListener(v -> toggleLay(false));
//Get scenario
floatingLay_infoContentTxt.setText(Html.fromHtml(App.testScenario));
//Steps
if (App.testPlansList.size() > 0) {
floatingLay_stepper.setVisibility(View.VISIBLE);
floatingLay_emptyStepLay.setVisibility(View.GONE);
testPlans = App.testPlansList;
for (int i = 0; i < testPlans.size(); i++) {
if (testPlans.get(i).getItemType().equals(ConstKeys.TEST_STEP_TEXT_RESPONSE)) {
StepDynamicEdt stepDynamicEdt = new StepDynamicEdt(testPlans.get(i).getTitle(), testPlans.get(i).getDesc());
// add to list
steps.add(stepDynamicEdt);
intList.add(i);
} else {
StepDynamicTxt stepDynamicTxt = new StepDynamicTxt(testPlans.get(i).getTitle(), testPlans.get(i).getDesc());
// add to list
steps.add(stepDynamicTxt);
}
}
//Setup steps
floatingLay_stepper.setup(this, steps)
.allowNonLinearNavigation(false)
.displayCancelButtonInLastStep(false)
.displayBottomNavigation(false)
.confirmationStepTitle("Accept")
.stepNextButtonText("Next")
.lastStepNextButtonText("Finish")
.includeConfirmationStep(false)
.init();
} else {
floatingLay_stepper.setVisibility(View.GONE);
floatingLay_emptyStepLay.setVisibility(View.VISIBLE);
floatingLay_emptyStepFinish.setOnClickListener(v -> {
this.stopSelf();
//Provide an haptic feedback on button press
Vibrator vibrate = (Vibrator) this.getSystemService(VIBRATOR_SERVICE);
Objects.requireNonNull(vibrate).vibrate(300);
stopScreenSharing();
Intent intent2 = new Intent(this, CompressorUploadActivity.class);
intent2.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent2);
});
}
//Task page btn
floatingLay_infoContentNextPage.setOnClickListener(v -> changeHeaderLayouts(TASKS));
return START_STICKY;
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
int orientation = newConfig.orientation;
if (orientation == Configuration.ORIENTATION_PORTRAIT) {
floatingLay_content.getLayoutParams().height = (int) getResources().getDimension(R.dimen._350mdp);
floatingLay_content.requestLayout();
} else if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
floatingLay_content.getLayoutParams().height = (int) getResources().getDimension(R.dimen._180mdp);
floatingLay_content.requestLayout();
}
}
private void timerMethod() {
chronometer.setFormat("%s");
chronometer.setBase(SystemClock.elapsedRealtime());
chronometer.setOnChronometerTickListener(chronometer -> {
if ((SystemClock.elapsedRealtime() - chronometer.getBase()) >= 10000000) {
chronometer.setBase(SystemClock.elapsedRealtime());
}
});
if (!running) {
chronometer.setBase(SystemClock.elapsedRealtime());
chronometer.start();
running = true;
}
}
public void toggleLay(boolean isOpen) {
if (!isOpen) {
YoYo.with(Techniques.SlideOutDown)
.duration(500)
.withListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationStart(Animator animation) {
floatingLay_emptyImg.setVisibility(View.GONE);
}
@Override
public void onAnimationEnd(Animator animation) {
floatingLay_main.setVisibility(View.GONE);
}
})
.playOn(floatingLay_root);
} else {
YoYo.with(Techniques.SlideInUp)
.duration(500)
.withListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationStart(Animator animation) {
floatingLay_main.setVisibility(View.VISIBLE);
changeHeaderLayouts(TASKS);
new Handler().postDelayed(() -> floatingLay_emptyImg.setVisibility(View.VISIBLE), 200);
}
})
.playOn(floatingLay_root);
}
}
private void changeHeaderLayouts(String type) {
switch (type) {
case INFO:
floatingLay_infoTxt.setBackgroundColor(ContextCompat.getColor(this, android.R.color.white));
floatingLay_tasksTxt.setBackgroundColor(ContextCompat.getColor(this, R.color.grayColor));
floatingLay_infoContentScroll.setVisibility(View.VISIBLE);
floatingLay_step2ContentLay.setVisibility(View.GONE);
break;
case TASKS:
floatingLay_tasksTxt.setBackgroundColor(ContextCompat.getColor(this, android.R.color.white));
floatingLay_infoTxt.setBackgroundColor(ContextCompat.getColor(this, R.color.grayColor));
floatingLay_infoContentScroll.setVisibility(View.GONE);
floatingLay_step2ContentLay.setVisibility(View.VISIBLE);
break;
}
}
@Override
public void onDestroy() {
if (floatingLayout != null) windowManager.removeView(floatingLayout);
super.onDestroy();
}
//Return ServiceBinder instance on successful binding
@Nullable
@Override
public IBinder onBind(Intent intent) {
return binder;
}
//Stop the service once the service is unbinded from recording service
@Override
public boolean onUnbind(Intent intent) {
stopSelf();
return super.onUnbind(intent);
}
@Override
public void onCompletedForm() {
this.stopSelf();
App.stepsBodyList.clear();
//Get data
for (int i : intList) {
stringBuilder.append("ID : ").append(testPlans.get(i).getId())
.append("Type : ").append(testPlans.get(i).getItemType())
.append("Content").append(steps.get(i).getStepData().toString()).append("-");
App.stepsBodyList.add(new DataItem(testPlans.get(i).getId(),
testPlans.get(i).getItemType(),
steps.get(i).getStepData().toString()));
}
//Provide an haptic feedback on button press
Vibrator vibrate = (Vibrator) this.getSystemService(VIBRATOR_SERVICE);
Objects.requireNonNull(vibrate).vibrate(300);
//Settings.System.putInt(this.getContentResolver(), "show_touches", 0);
stopScreenSharing();
Intent intent = new Intent(this, CompressorUploadActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
@Override
public void onCancelledForm() {
}
public class ServiceBinder extends Binder {
public FloatingLayoutService getService() {
return FloatingLayoutService.this;
}
}
/**
* Set stop intent and start the recording service
*/
private void stopScreenSharing() {
Intent stopIntent = new Intent(this, RecorderService.class);
stopIntent.setAction(ConstKeys.SCREEN_RECORDING_STOP);
startService(stopIntent);
}
}
单击完成按钮时，请拨打以下代码：
floatingLay_emptyStepFinish.setOnClickListener(v -> {
this.stopSelf();
//Provide an haptic feedback on button press
Vibrator vibrate = (Vibrator) this.getSystemService(VIBRATOR_SERVICE);
Objects.requireNonNull(vibrate).vibrate(300);
stopScreenSharing();
Intent intent2 = new Intent(this, CompressorUploadActivity.class);
intent2.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent2);
});
如何为Android 9修复此问题？
请使用forgroundServices或JobScheduler。https://medium.com/exploring-android/exploring-background-execution-limits-on-android-oreo-ab384762a66c