我目前正在尝试使我正在开发的应用程序更易于使用，但在尝试合并建立与 PSoC 4 BLE 连接所需的按钮数量时遇到了问题。最后，我想要一个按钮来处理服务的搜索、连接和发现。但是，当我在处理激活蓝牙无线电的方法下复制并粘贴代码（用于搜索、连接和发现）时，应用程序在遇到扫描回调时崩溃。我仍然是 Android 应用程序开发的新手，我正在尝试使用调试器，但我似乎被卡住了。第一个代码片段是我想要做的，第二个片段是被调用的扫描函数。以下代码段是调试器输出。
//what I am trying to do
public void startBluetooth(View view) {
/** Find BLE service and adapter */
final BluetoothManager bluetoothManager =
(BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
BluetoothAdapter mBluetoothAdapter = bluetoothManager.getAdapter();
/** Ensures Bluetooth is enabled on the device. If Bluetooth is not currently enabled,
// fire an intent to display a dialog asking the user to grant permission to enable it. */
if (!mBluetoothAdapter.isEnabled()) {
Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, REQUEST_ENABLE_BLE);
}
/** Start the BLE Service */
Log.d(TAG, "Starting BLE Service");
Intent gattServiceIntent = new Intent(this, PSoCCapSenseLEDService.class);
bindService(gattServiceIntent, mServiceConnection, BIND_AUTO_CREATE);
/** Disable the start button and turn on the search button */
start_button.setEnabled(false);
search_button.setEnabled(true);
Log.d(TAG, "Bluetooth is Enabled");
// search function does not crash app
// cannot force step into if statement, is mServiceConnected true?
// no mServiceConnected appears to false
// okay let's force this if statement to be executed
// but first setting code back to normal and seeing how mServiceConnected is set
mPSoCCapSenseLedService.scan(); // causes crash
mPSoCCapSenseLedService.connect(); // crash
mPSoCCapSenseLedService.discoverServices();
}
public void scan() {
/** Scan for devices and look for the one with the service that we want
* UUID ending in F0 i.e. the ledcapsense service*/
UUID capsenseLedService = UUID.fromString(capsenseLedServiceUUID);
UUID[] capsenseLedServiceArray = {capsenseLedService};
/** Use old scan method for versions for different platform versions */
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
/** noinspection deprecation */
mBluetoothAdapter.startLeScan(capsenseLedServiceArray, mLeScanCallback);
} else { /** New BLE scanning introduced in LOLLIPOP */
ScanSettings settings;
List<ScanFilter> filters;
mLEScanner = mBluetoothAdapter.getBluetoothLeScanner();
settings = new ScanSettings.Builder()
.setScanMode(ScanSettings.SCAN_MODE_LOW_LATENCY)
.build();
filters = new ArrayList<>();
/** We will scan just for the CAR's UUID */
ParcelUuid PUuid = new ParcelUuid(capsenseLedService);
ScanFilter filter = new ScanFilter.Builder().setServiceUuid(PUuid).build();
filters.add(filter);
mLEScanner.startScan(filters, settings, mScanCallback);
}
}
this.mResolvedMethod = No such instance field: 'mResolvedMethod'
this = {MainActivity@9661}
view = {AppCompatButton@9664} "android.support.v7.widget.AppCompatButton{60e52c VF.D..C.. ...P..ID 64,64-1376,256 #7f07008a app:id/start_button}"
bluetoothManager = {BluetoothManager@9665}
mAdapter = {BluetoothAdapter@9666}
shadow$_klass_ = {Class@3343} "class android.bluetooth.BluetoothManager"
shadow$_monitor_ = 0
mBluetoothAdapter = {BluetoothAdapter@9666}
mBleExtSupportArr = {boolean[1]@9772}
mBleSupportArr = {boolean[6]@9773}
mBluetoothDisableBleCallback = {BluetoothAdapter$4@9774}
mBluetoothStateChangeCallback = {BluetoothAdapter$3@9775}
mContext = {Application@9688}
mIsBleExtSupportArrSet = false
mIsBleSupportArrSet = false
mLeScanClients = {HashMap@9776} size = 0
mLock = {Object@9777}
mManagerCallback = {BluetoothAdapter$2@9778}
mManagerService = {IBluetoothManager$Stub$Proxy@9779}
mMyPid = 32668
mMyUid = 10025
mPackageName = "iantempleton0.gmail.com.fromscratch"
mProxyServiceStateCallbacks = {ArrayList@9781} size = 0
mService = {IBluetooth$Stub$Proxy@9782}
mServiceLock = {ReentrantReadWriteLock@9783} "java.util.concurrent.locks.ReentrantReadWriteLock@366f373[Write locks = 0, Read locks = 0]"
mStateChangedCallbacks = {ArrayList@9784} size = 0
mSwitchingUser = false
mToken = {Binder@9785}
packageNameforEnable = ""
shadow$_klass_ = {Class@5364} "class android.bluetooth.BluetoothAdapter"
shadow$_monitor_ = 0
gattServiceIntent = {Intent@9667} "Intent { cmp=iantempleton0.gmail.com.fromscratch/.PSoCCapSenseLEDService }"
mAction = null
mCategories = null
mClipData = null
mComponent = {ComponentName@9789} "ComponentInfo{iantempleton0.gmail.com.fromscratch/iantempleton0.gmail.com.fromscratch.PSoCCapSenseLEDService}"
mContentUserHint = -2
mData = null
mExtras = null
mFlags = 0
mForceLaunchOverTargetTask = false
mIdentifier = null
mLaunchOverTargetTaskId = 0
mLaunchToken = null
mPackage = null
mPairActivityUserId = 0
mPairWindowingMode = 0
mSelector = null
mSourceBounds = null
mType = null
shadow$_klass_ = {Class@3753} "class android.content.Intent"
shadow$_monitor_ = 0
search_button = {AppCompatButton@9668} "android.support.v7.widget.AppCompatButton{b1d2bf5 VFED..C.. ......ID 64,256-1376,448 #7f070072 app:id/search_button}"
mBackgroundTintHelper = {AppCompatBackgroundHelper@9792}
mTextHelper = {AppCompatTextHelper@9793}
mIsThemeDeviceDefault = false
HOVER_INTERVAL = 300
SEC_CLIPBOARD_DISABLED = 0
SEC_CLIPBOARD_ENABLED = 1
SEC_CLIPBOARD_UNKNOWN = -1
TOUCH_DELTA = 12.0
mActionModeFlags = 241664
mAllowTransformationLengthChange = false
mAttachedWindow = false
mAutoLinkMask = 0
mAutoSizeMaxTextSizeInPx = -1.0
mAutoSizeMinTextSizeInPx = -1.0
mAutoSizeStepGranularityInPx = -1.0
mAutoSizeTextSizesInPx = {int[0]@9725}
mAutoSizeTextType = 0
mBoring = {BoringLayout$Metrics@9794} "FontMetricsInt: top=-60 ascent=-52 descent=14 bottom=16 leading=0 width=441"
mBreakStrategy = 0
mBufferType = {TextView$BufferType@9727} "NORMAL"
mButtonShapeAlpha = 0
mButtonShapeColor = -570425344
mButtonShapeLuminance = 0.0
mButtonShapeOutlineRadius = 0
mButtonShapeOutlineStrokeBottom = 0
mButtonShapeOutlineStrokeDisabled = 0
mButtonShapeOutlineStrokeEnabled = 0
mButtonShapeOutlineStrokeHorizontal = 0
mButtonShapeOutlineStrokeTop = 0
mButtonShapePaint = null
mButtonShapeRect = null
mButtonShapeSettingEnabled = false
mButtonShapeTextColor = null
mButtonShapeTextColorDark = 0
mButtonShapeTextColorLight = 0
mCanPaste = false
mCanTextMultiSelection = false
mChangeWatcher = null
mChangedSelectionBySIP = false
mCharWrapper = null
mClipboardChangeListener = null
mClipboardDataFormat = 1
mCoverManager = null
mCurHintTextColor = 1627389952
mCurTextColor = -570425344
mCurrentSpellCheckerLocaleCache = null
mCursorDrawable = null
mCursorDrawableRes = 17304300
mDPIMaxLength = -1
mDPITextBuffer = null
mDeferScroll = -1
mDesiredHeightAtMeasure = 192
mDeviceProvisionedState = 0
mDisplayText = null
mDrawStrikeAnimationValue = 0.0
mDrawTextStrikeAnimator = null
mDrawables = null
mEditableFactory = {Editable$Factory@9728}
mEditor = null
mEllipsisKeywordCount = -1
mEllipsisKeywordStart = -1
mEllipsize = null
mEnableLinkPreview = false
mEnableMultiSelection = true
mFakeBold = {Boolean@9729} false
mFilters = {InputFilter[0]@9730}
mFlagForGlobalLayout = false
mFreezesText = false
mGlobalLayoutListener = null
mGravity = 17
mHasPresetAutoSizeValues = false
mHighlightColor = 1728004225
mHighlightPaint = {Paint@9795}
mHighlightPath = null
mHighlightPathBogus = true
mHint = null
mHintBoring = null
mHintLayout = null
mHintTextColor = {ColorStateList@9732} "ColorStateList{mThemeAttrs=nullmChangingConfigurations=0mStateSpecs=[[16842910, 16842919], []]mColors=[-1979711488, 1627389952]mDefaultColor=1627389952}"
mHorizontallyScrolling = false
mHoverEnterTime = -1
mHoverExitTime = -1
mHoveredSpan = null
mHyphenationFrequency = 0
mIncludePad = true
mIsButtonShapeTarget = false
mIsDebugTextClock = false
mIsSecClipboardEnabled = -1
mIsShowingLinkPreview = false
TextView.mIsThemeDeviceDefault = false
mIsThemeDeviceDefaultDark = false
mIsTouchDown = false
mJustificationMode = 0
mKeycodeDpadCenterStatus = false
mLastLayoutDirection = 0
mLastScroll = 0
mLastValueSentToAutofillManager = null
mLayout = {BoringLayout@9796}
mLineIsDrawed = false
mLinkTextColor = {ColorStateList@9734} "ColorStateList{mThemeAttrs=nullmChangingConfigurations=0mStateSpecs=[[]]mColors=[-49023]mDefaultColor=-49023}"
mLinksClickable = true
mListenerChanged = false
mListeners = null
mLocalesChanged = false
mMarquee = null
mMarqueeFadeMode = 0
mMarqueeRepeatLimit = 3
mMaxMode = 1
mMaxWidth = 2147483647
mMaxWidthMode = 2
mMaximum = 2147483647
mMinMode = 2
mMinWidth = 352
mMinWidthMode = 2
mMinimum = 192
mMovement = null
mMultiHighlightColor = -1728022343
mMultiHighlightPaint = null
mMultiSelectPopupWindow = {MultiSelectPopupWindow@9735}
mNeedsAutoSizeText = false
mOldMaxMode = 1
mOldMaximum = 2147483647
mPasteEventListener = null
mPenSelectionController = null
mPreDrawListenerDetached = false
mPreDrawRegistered = false
mPrecomputed = null
mPreventDefaultMovement = false
mRestartMarquee = false
mRestrictionPolicy = null
mSavedHintLayout = null
mSavedLayout = {BoringLayout@9796}
mSavedMarqueeModeLayout = null
mScroller = null
mSemClipboardManager = null
mShadowColor = 0
mShadowDx = 0.0
mShadowDy = 0.0
mShadowRadius = 0.0
mSingleLine = false
mSkipUpdateDisplayText = false
mSoftInputEnabled = true
mSpacingAdd = 0.0
mSpacingMult = 1.0
mSpannable = null
mSpannableFactory = {Spannable$Factory@9736}
mStrikeThroughPaint = null
mStylusEventListener = null
mTempRect = null
mTempTextPaint = null
mText = "Search for Device"
mTextClassificationContext = null
mTextClassificationSession = null
mTextClassifier = null
mTextColor = {ColorStateList@9738} "ColorStateList{mThemeAttrs=nullmChangingConfigurations=0mStateSpecs=[[-16842910], []]mColors=[1107296256, -570425344]mDefaultColor=-570425344}"
mTextDir = {TextDirectionHeuristics$TextDirectionHeuristicInternal@9739}
mTextEditSuggestionContainerLayout = 17367391
mTextEditSuggestionHighlightStyle = 16974826
mTextEditSuggestionItemLayout = 17367393
mTextEffect = {SFText@9798}
mTextEffectFontFamily = "sans-serif-medium"
mTextEffectLines = 0
mTextId = 2131427338
mTextOperationUser = null
mTextPaint = {TextPaint@9799}
mTextSelectHandle = null
mTextSelectHandleLeft = null
mTextSelectHandleLeftRes = 17304305
mTextSelectHandleRes = 17304307
mTextSelectHandleRight = null
mTextSelectHandleRightRes = 17304309
mTextSetFromXmlOrResourceId = true
mTextStrikeThroughEnabled = false
mToolType = 0
mTransformation = null
mTransformed = "Search for Device"
mUseDisplayText = false
mUseFallbackLineSpacing = true
mUseInternationalizedInput = true
mUserSetTextScaleX = false
mWordIteratorForMultiSelection = null
mhasMultiSelection = false
isPenSideButton = false
mAccessibilityCursorPosition = -1
mAccessibilityDelegate = null
mAccessibilityPaneTitle = null
mAccessibilityTraversalAfterId = -1
mAccessibilityTraversalBeforeId = -1
mAccessibilityViewId = 7
mAnimator = null
mAppRespTracker = null
mAttachInfo = {View$AttachInfo@9743}
mAttributeResolutionStacks = null
mAttributeSourceResId = null
mAttributes = null
mAutofillHints = null
mAutofillId = null
mAutofillViewId = -1
mBackground = {RippleDrawable@9800}
mBackgroundRenderNode = {RenderNode@9801}
mBackgroundResource = 0
mBackgroundSizeChanged = false
mBackgroundTint = null
mBixbyTouchFoundText = null
mBottom = 448
mBottomLeftRound = null
mBottomLeftRoundColor = 0
mBottomRightRound = null
mBottomRightRoundColor = 0
mCachedContentCaptureSession = null
mCachingFailed = false
mClipBounds = null
mContentCaptureSession = null
mContentDescription = null
mContext = {MainActivity@9661}
mCurrentAnimation = null
mDefaultFocusHighlight = null
mDefaultFocusHighlightCache = null
mDefaultFocusHighlightEnabled = true
mDefaultFocusHighlightSizeChanged = true
mDefaultRoundedCornerColor = 0
mDeviceRadius = 0
mDirectPenInput = null
mDisablePenGestureforfactorytest = true
mDrawableState = {int[4]@9802}
mDrawingCache = null
mDrawingCacheBackgroundColor = 0
mExplicitStyle = 0
mExtraPaddingBottomForPreference = 0
mFloatingTreeObserver = null
mForegroundInfo = null
mFrameMetricsObservers = null
mGhostView = null
mHasPerformedLongPress = false
mHorizontalScrollbarPosition = 0
mHoverPopup = null
mHoverPopupToolTypeByApp = 0
mHoverPopupType = 0
mHoveringTouchDelegate = false
mID = 2131165298
mIgnoreNextUpEvent = false
mImageFilterBridge = null
mInContextButtonPress = false
mInputEventConsistencyVerifier = null
mIsAllowedPokeDrawLock = false
mIsDirectPenInputEnabled = false
mIsSetFingerHoveredInAppWidget = true
mKeyedTags = null
mLabelForId = -1
mLastIsOpaque = false
mLayerPaint = null
mLayerType = 0
mLayoutInsets = null
mLayoutParams = {LinearLayout$LayoutParams@9803}
mLeft = 64
mLeftPaddingDefined = false
mListenerInfo = {View$ListenerInfo@9804}
mLongClickX = NaN
mLongClickY = NaN
mMatchIdPredicate = null
mMatchLabelForPredicate = null
mMeasureCache = {LongSparseLongArray@9805} "{4611691655571966032=5634997092544}"
mMeasuredHeight = 192
mMeasuredWidth = 1312
mMinHeight = 192
View.mMinWidth = 352
mNeededToChangedScrollBarPosition = false
mNestedScrollingParent = null
mNextClusterForwardId = -1
mNextFocusDownId = -1
mNextFocusForwardId = -1
mNextFocusLeftId = -1
mNextFocusRightId = -1
mNextFocusUpId = -1
mOldHeightMeasureSpec = -2147481520
mOldWidthMeasureSpec = 1073743136
mOutlineProvider = {ViewOutlineProvider$1@9750}
mOverScrollMode = 1
mOverlay = null
mPaddingBottom = 40
mPaddingLeft = 48
mPaddingRight = 48
mPaddingTop = 40
mParent = {LinearLayout@9751} "android.widget.LinearLayout{dab43e2 V.E...... .......D 0,0-1440,2448}"
mPendingCheckForLongPress = null
mPendingCheckForTap = null
mPerformClick = null
mPointerIcon = null
mPointerIconForMouse = null
mPointerIconForStylus = null
mPrivateFlags = -2128607216
mPrivateFlags2 = 1611867688
mPrivateFlags3 = 537395220
mRecreateDisplayList = false
mRenderNode = {RenderNode@9806}
mRenderNodeImageFilter = null
mRenderNodeImageFilterClipRects = {ArrayList@9807} size = 0
mResources = {Resources@9707}
mRight = 1376
mRightPaddingDefined = false
mRoundRadius = -1
mRoundScrollbarRenderer = null
mRoundedCornerBounds = {Rect@9808} "Rect(0, 0 - 0, 0)"
mRoundedCornerMode = 0
mRoundedCornerRadius = 0
mRunQueue = null
mScrollBarPositionPadding = 0
mScrollCache = null
mScrollIndicatorDrawable = null
mScrollX = 0
mScrollY = 0
mScrollbarVerticalPadding = 0
mSemHorizontalScrollbarRect = {Rect@9809} "Rect(0, 0 - 0, 0)"
mSemOffsetRequesterBounds = null
mSemOffsetRequesterExpirer = null
mSemOffsetRequesterTrimer = null
mSemOnAddRemoveListener = null
mSemSFState = 0
mSemScrollingByScrollbar = false
mSemScrollingVertical = true
mSemVerticalChildOffset = 0
mSemVerticalScrollbarRect = {Rect@9810} "Rect(0, 0 - 0, 0)"
mSemViewFlags = 0
mSendViewScrolledAccessibilityEvent = null
mSendingHoverAccessibilityEvents = false
mSmartClipDataExtractionListener = null
mSmartClipDataTag = null
mSourceLayoutId = 2131296284
mStartActivityRequestWho = null
mStateListAnimator = {StateListAnimator@9811}
mSystemUiVisibility = 0
mTag = null
mTempNestedScrollConsumed = null
mTooltipInfo = null
mTop = 256
mTopLeftRound = null
mTopLeftRoundColor = 0
mTopRightRound = null
mTopRightRoundColor = 0
mTouchDelegate = null
mTouchSlop = 32
mTransformationInfo = null
mTransientStateCount = 0
mTransitionName = null
mUnscaledDrawingCache = null
mUnsetPressedState = null
mUserPaddingBottom = 40
mUserPaddingEnd = -2147483648
mUserPaddingLeft = 48
mUserPaddingLeftInitial = 48
mUserPaddingRight = 48
mUserPaddingRightInitial = 48
mUserPaddingStart = -2147483648
mVerticalScrollFactor = 0.0
mVerticalScrollbarPosition = 0
mViewFlags = 402669569
mVisibilityChangeForAutofillHandler = null
mWindowAttachCount = 1
shadow$_klass_ = {Class@9494} "class android.support.v7.widget.AppCompatButton"
shadow$_monitor_ = -1961022475
mPSoCCapSenseLedService = null