Question

我有以下代码，想知道在onCreate()之前调用什么，因为它在调用活动（选项卡式活动）之前显示空白屏幕。可以做些什么来避免显示空白屏幕？

我甚至无法使用onAttach，因为我的课程正在扩展 AppCompatActivity 并实施OnMapReadyCallback，PlaceSelectionListener。

@Override
protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_tabbed);
  TabHost tab = (TabHost) findViewById(R.id.tabHost);
  tab.setup();

  TabHost.TabSpec spec1 = tab.newTabSpec("Search");
  spec1.setIndicator("Search");
  spec1.setContent(R.id.layout1);
  tab.addTab(spec1);

  TabHost.TabSpec spec2 = tab.newTabSpec("Settings");
  spec2.setIndicator("Settings");
  spec2.setContent(R.id.layout2);
  tab.addTab(spec2);

  SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
  mapFragment.getMapAsync(this);
  locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
  provider = locationManager.getBestProvider(new Criteria(), false);

  if (android.os.Build.VERSION.SDK_INT > 9) {
    StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
    StrictMode.setThreadPolicy(policy);
  }
}

Answer 1

要避免空白屏幕，您可以使用以下代码。它有效!!

<style name="Theme.Transparent" parent="Theme.AppCompat.Light.NoActionBar">
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowActionBar">false</item>
    <item name="android:windowFullscreen">true</item>
    <item name="android:windowContentOverlay">@null</item>
    <item name="android:windowIsTranslucent">true</item>
</style>
and use it with your activity in AndroidManifest as:

<activity android:name=".ActivitySplash" android:theme="@style/Theme.Transparent">

Answer 2

如果创建了活动，则调用以下函数：

onCreate()

onStart()   

onResume()

onPause()

onStop()

onDestroy()

onRestart()

当片段在活动中制作时：

onAttach()

onCreate() 

onCreateView() 

onActivityCreated()

 onCreateView() 

onStart()

onResume()

onPause() 

onStop()

onDestroyView()

onDestroy()