setcontentview

Android: Use setContentView() after Thread finished

由 |▌冷眼眸甩不掉的悲伤 提交于 2019-12-11 08:16:41
问题 I want to use the setContentView() method after a thread has completed his task. But how could I realize this, as its not possible to use this method inside the thread? When using this method in the onCreate() method while the thread is running, I also don´t get the correct result, cause the layout wich should be displayed with the first "setContentView(R.layout.load_screen)" is not displayed. My onCreate() Method: protected void onCreate(Bundle savedInstanceState) { super.onCreate

List View dissapears after changing activities

由 本小妞迷上赌 提交于 2019-12-08 13:20:43
问题 for quite a few hours now, I've been struggling with an issue regarding list views in java in a practice to-do app that I'm trying to make. I have a list view on my main activity and after changing from that activity and back to it, the list view is gone. I googled and saw people changing things and saving instances and tried to implement it with no success, however, that might be because I'm extremely new to java. Here is the code: public class MainActivity extends AppCompatActivity {

Android UI源码解析

由 |▌冷眼眸甩不掉的悲伤 提交于 2019-12-04 01:18:34
首先我们从activity中的oncreate中的setContentView()方法介绍： 在Window 抽象类中有三个setContentView的方法，Window类有是Activity的成员属性 PhoneWindow继承了Window 实现了setContentView方法, 在PhoneWindow类中还有内部类DecorView DecorView继承了Framelayout 是一个具体现实View容器。 在PhoneWindow中实现setContentView具体方法： (layoutResID) { (== ) { installDecor()} (!hasFeature()) { .removeAllViews()} (hasFeature()) { Scene newScene = Scene.(layoutResIDgetContext())transitionTo(newScene)} { .inflate(layoutResID)} Callback cb = getCallback()(cb != && !isDestroyed()) { cb.onContentChanged()} } 首先判断了mContentparent 是否为空，这个就是xml文件的根节点 mLayoutInflater.inflate(layoutResID,

Implementing Admob banner when setContentView() is used for the Surfaceview

由 北城余情 提交于 2019-12-02 18:15:02
问题 I am struggling to implement an admob banner into my app because the setContentView() method is used for the surfaceView called gameView so creating the adView in xml cannot be applied to this framework as setContentView is already being used. And I don't know how to do this programmatically. Does anyone have a solution to this? My main Activity: public class GameMainActivity extends BaseGameActivity { .... @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate

how to set setContentView in fragment

由 北城余情 提交于 2019-12-02 10:04:12
I am trying to call a library in a fragment but dont know how to set it in a fragment I have done it in the main activity but I am getting an error in setting the setContentView in my fragment the compile dependency compile 'com.github.medyo:android-about-page:1.0.2' my fragment content view @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // Inflate the layout for this fragment View rootView = inflater.inflate(R.layout.fragment_navigation, container, false); Element versionElement = new Element(); versionElement.setTitle("Version 6

SwipeRefreshLayout can host only one direct child

由 本秂侑毒 提交于 2019-12-01 16:24:39
I added a "pull to refresh" to my listView, i also wanted to add an empty view when the list is empty - Now i got this error. How can i make this work? if im positioning a view outside of the swipeRefresh and then add it as the emptyView it will work. So how do i so it with an outer xml file .. ? The xml code: <android.support.v4.widget.SwipeRefreshLayout android:id="@+id/swipeRefreshLayout" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" > <ListView android:id="@android:id/list" android:layout

Reason for NullPointerException if setContentView() is not used

由 ￡可爱￡侵袭症＋ 提交于 2019-11-28 14:38:05
I know that we need to place setContentView() in the onCreate() method before initializing any view otherwise it will throw a null pointer exception. But what is the reason for it?Is the setContentView() similar to the inflate() method? before initializing any view I do not know for certain what you mean by "initializing any view". Given the rest of your question, I am going to interpret this as meaning "call findViewById() on the activity". You need to call setContentView() before calling findViewById() , because otherwise there are no widgets to find. Is the setContentView() similar to the

Reason for NullPointerException if setContentView() is not used

由 笑着哭i 提交于 2019-11-27 08:40:11
问题 I know that we need to place setContentView() in the onCreate() method before initializing any view otherwise it will throw a null pointer exception. But what is the reason for it?Is the setContentView() similar to the inflate() method? 回答1: before initializing any view I do not know for certain what you mean by "initializing any view". Given the rest of your question, I am going to interpret this as meaning "call findViewById() on the activity". You need to call setContentView() before

Android: is using setContentView multiple times bad while changing layouts?

由 笑着哭i 提交于 2019-11-26 08:32:56
问题 is using setContentView multiple times bad while changing layouts? Some people say that it\'s bad and they never say why. and is there some other thing to change layout using button? 回答1: Let's take a look at the Android Documents: Set the activity content to an explicit view. This view is placed directly into the activity's view hierarchy. So, setContentView will overwrite the layout, and replace it with a new one. Usually, you only want to do this once in onCreate. Theoretically, you could
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