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Eclipse Graphical Editor does not display a xml source code - error bug


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Try this solutions:
1.) Save xml file
2.) Close tab with xml file
3.) Reopen xml file

1.) Open from menu Window->Android SDK Manager
2.) Select available updates (Tools, SDK etc.)
3.) Install updates

1.) Open from menu Help->Check for Updates
2.) Install available plugins what You need
3.) Restart Eclipse



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Další témata ....(Topics)


98

Activity Lifecycle if button Home pressed Android example | activity-lifecycle-if-button-home-pressed-android-example


If on Android emulator home button pressed.

// button home presssed
19:37:06.727: INFO/ActivityManager(60): Starting: 
Intent { act=android.intent.action.MAIN cat=[android.intent.category.HOME] 
flg=0x10200000 cmp=com.android.launcher/com.android.launcher2.Launcher } from pid 60

19:37:06.807: INFO/onSaveInstanceState(339): onSaveInstanceState()
19:37:06.848: INFO/onPause(339): onPause()
19:37:07.968: INFO/onStop(339): onStop()


Diagram of Activity lifecycle if button HOME pressed

life_cycle_button_home_pressed
320

layout id cannot be resolved or is not a field | layout-id-cannot-be-resolved-or-is-not-a-field


1.) check your xml files in res/layout folder if contain errors or warnings, repair this
2.) try comment import R in Activity file
// import com.mysite.packagename.R;
3.) every clean and rebuild project
311

findViewById in onCreate returns NULL when using Fragment | findviewbyid-in-oncreate-returns-null-when-using-fragment


Call findViewById from onCreateView

public class MainActivity extends ActionBarActivity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		if (savedInstanceState == null) {
			getSupportFragmentManager().beginTransaction()
					.add(R.id.containerMoje, new PlaceholderFragment()).commit();
		}
		
	}


	/**
	 * A placeholder fragment containing a simple view.
	 */
	public static class PlaceholderFragment extends Fragment {
		public PlaceholderFragment() {
		}

		@Override
		public View onCreateView(LayoutInflater inflater, ViewGroup container,
				Bundle savedInstanceState) {
			View rootView = inflater.inflate(R.layout.fragment_main, container,
					false);
			if (container == null) {
		        return null;
		    }


			 TextView mText;
			mText = (TextView)rootView.findViewById(R.id.idText);
			mText.setText("Hello from fragment_main");

			return rootView;
		}
	}
}




res\layout
activity_main.xml

<FrameLayout xmlns:android="//schemas.android.com/apk/res/android"
    xmlns:tools="//schemas.android.com/tools"
    android:id="@+id/containerMoje"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="cz.okhelp.autoskola.MainActivity"
    tools:ignore="MergeRootFrame" />



fragment_main.xml

<RelativeLayout xmlns:android="//schemas.android.com/apk/res/android"
    xmlns:tools="//schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="cz.okhelp.autoskola.MainActivity$PlaceholderFragment" >

    <TextView
        android:id="@+id/idText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

</RelativeLayout>
390

Android runtime change switch Activity theme | android-runtime-change-switch-activity-theme



static boolean mbThemeLight = false;

 @Override
    public void onCreate(Bundle savedInstanceState) {
         if(mbThemeLight)
        setTheme(android.R.style.Theme_Light);
        super.onCreate(savedInstanceState);
        // bla bla bla..........
    }

private void switchTheme(){
 mbThemeLight = true;
 this.recreate();
}
394

CSS circle style html | css-circle-style-html



      create div with class with name e.g. circle

      create in styleSheet.css class circle



html code

 <div class="circle" id="">3</div>


css code

.circle {
 border-radius: 50%;
    width: 50px;
    height: 50px;
    background: yellow;
    position: absolute;
    display: block;
    border: 6px solid blue;
    font-size: 50px;
    text-align: center;
}






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Editace: 2014-02-15 20:34:58
Počet článků v kategorii: 397
Url:eclipse-graphical-editor-does-not-display-code-error-bug

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