=nulloverridefunonCreate(savedInstanceState:Bundle?){super.onCreate(savedInstanceState)setContentView(R.layout.activity_main)myTextView=findViewById(R.id.textView)displayText()}privatefundisplayText(){myTextView!!.text="Hello, World!"// 这里出现must not be null错误}} 1. 2. 3. 4. 5. 6. ...
AI代码解释 //ViewRootImpl.javapublicViewRootImpl(Context context,Display display){this(context,display,WindowManagerGlobal.getWindowSession(),false/* useSfChoreographer */);}//WindowManagerGlobal.javapublicstaticIWindowSessiongetWindowSession(){synchronized(WindowManagerGlobal.class){if(sWindowSession==null){...
if (outData != NULL) \*outData = data; return ident; } } if (result != 0) { #if DEBUG\_POLL\_AND\_WAKE ALOGD("%p ~ pollOnce - returning result %d", this, result); #endif if (outFd != NULL) \*outFd = 0; if (outEvents != NULL) \*outEvents = 0; if (outData !
conn:Receives information as the service is started and stopped. This must be a valid ServiceConnection object; it must not be null. flags:Operation options for the binding. May be 0, BIND_AUTO_CREATE, BIND_DEBUG_UNBIND, BIND_NOT_FOREGROUND, BIND_ABOVE_CLIENT, BIND_ALLOW_OOM_MANAGEMENT, or...
null split name)andzeroormore"split"APKs (with unique split names). Anysubsetof these APKs canbeinstalledtogether, as long as the following constraints are met: PackageInstaller.Session null All APKs must have the exact same package name, version code,andsigning certificates. ...
mustnotbeset.** If {@code color}isnotopaque, consider setting* {@link android.view.View#SYSTEM_UI_FLAG_LAYOUT_STABLE}and* {@link android.view.View#SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN}.* * The transitionNamefortheviewbackground will be"android:status:background".* */publicabstract void setSta...
publicvoidattachInfo(@NonNullContext context,@NonNullProviderInfo info){super.attachInfo(context, info);// Check our security attributesif(info.exported) {thrownewSecurityException("Provider must not be exported"); }if(!info.grantUriPermissions) {thrownewSecurityException("Provider must grant uri permiss...
publicfinal class WindowManagerGlobal {publicvoid removeView(Viewview, boolean immediate) {if (view==null) {throw new IllegalArgumentException("view must not be null");}synchronized (mLock) {//1. 查找待删除View的索引intindex= findViewLocked(view,true);ViewcurView = mRoots.get(index).getView...
class HeifByteBufferBitmapDecoder(bitmapPool: BitmapPool): ResourceDecoder<ByteBuffer, Bitmap> { private val bitmapPool: BitmapPool init { this.bitmapPool = Preconditions.checkNotNull(bitmapPool) } override fun handles(source: ByteBuffer, options: Options): Boolean { val buffer = ByteBufferUtil...
=null){returncached;}final MutableLiveData<User>data=newMutableLiveData<>();userCache.put(userId,data);// this is still suboptimal but better than before.// a complete implementation must also handle the error cases.webservice.getUser(userId).enqueue(newCallback<User>(){@Overridepublicvoidon...