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On orientation changed view button textview not visible Android


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Try add to AndroidManifest.xml configChanges for your Activity
android:configChanges="keyboardHidden|orientation|screenSize"


 <activity android:name=".MainActivity"
                  android:label="@string/app_name"
                  android:configChanges="keyboardHidden|orientation|screenSize"
                  >

397LW NO topic_id




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Další témata ....(Topics)


349

Android Studio bug versioncode versionname signed apk issue | android-studio-bug-versioncode-versionname-signed-apk-issue


If you change android:versionCode="224" and android:versionName="2.2.4" in AndroidManifest.xml you have to change this in build.gradle file too.
Click on build.gradle in package explorer tree change your new version name and code:


  defaultConfig {
        applicationId "cz.okhelp.pocasiwidget"
        minSdkVersion 11
        targetSdkVersion 23
        versionCode 224
        versionName "2.2.4"
    }
328

Screen size density independent pixel resolution | screen-size-density-independent-pixel-resolution


Terms Screen size, density, density independent pixel, resolution as a picture - pictogram.
mobile-phone-screen-resolution-terms

Test your knowledge
Q: How to find out the phone screen size?
A: (By length of display diagonale in inch -  Not to measure a diagonal of device!!!)

Q: What resolution has 720 x 1280 display?
A: (921600 pixels)

Q: What does it mean "240 dpi" screen density?
A: (Display have density 240 x 240  dots - "Tri-color LED etc." - per every physical (real) square inch. If you have icon 240x240 pixels, this will just occupy an area of one square inch on the display.)

Q: Phone have screen density 240 dpi. Image for 160 dpi screen density have size 128x 128 pixels. What will be the size of the image for 240 dpi screen density?
A: (Calculate the virtual pixels size.   128 * (240/160)  =  192.  You have to resize image to new size 192 x 192 physical pixels and put into folder drawable-hdpi (high) ~240dpi  for phone with screen density 240 dpi. ) or use density independend pixels 128dp x 128dp.

 

 
249

How to Scroll large image in ImageView Android Example | how-to-scroll-large-image-in-imageview-android-example


main.xml

    <LinearLayout xmlns:android="//schemas.android.com/apk/res/android"
		android:orientation="vertical"
			android:gravity="top"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >

        <ScrollView
            android:id="@+id/scrollView1"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content" >

            <HorizontalScrollView
                android:id="@+id/horizontalScrollView1"
                android:layout_width="match_parent"
                android:layout_height="wrap_content" >

 
            <LinearLayout
			    android:gravity="top"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content" >

                <ImageView
                    android:id="@+id/imageViewObrazekGeometrie"
                    android:layout_width="360dp"
                    android:layout_height="777dp"
                    android:src="@drawable/geometrie_vzorecky" />

            </LinearLayout>
            </HorizontalScrollView>
        </ScrollView>

    </LinearLayout>

206

at java.util.Arrays$ArrayList.get(Arrays.java:75) | at-java-util-arraysarraylist-getarrays-java75


Problem in Android application:

E/AndroidRuntime(416): FATAL EXCEPTION: main
E/AndroidRuntime(416): java.lang.IndexOutOfBoundsException
E/AndroidRuntime(416): 	at java.util.Arrays$ArrayList.get(Arrays.java:75)
E/AndroidRuntime(416): 	at android.widget.ArrayAdapter.getItem(ArrayAdapter.java:298)
E/AndroidRuntime(416): 	at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:351)
E/AndroidRuntime(416): 	at android.widget.ArrayAdapter.getView(ArrayAdapter.java:323)
E/AndroidRuntime(416): 	at android.widget.Spinner.makeAndAddView(Spinner.java:192)
E/AndroidRuntime(416): 	at android.widget.Spinner.layout(Spinner.java:151)
E/AndroidRuntime(416): 	at android.widget.Spinner.onLayout(Spinner.java:115)


Solution: check code for set and get selection

// Spinner _spin1 contain only  49 items 
// you can set max 48 ( range 0 - 48)
// 50 is IndexOutOfBoundsException
_spin1.setSelection(50);
232

goto statement in Java | goto-statement-in-java


You can use for, do while, while cycle for example:

public void myFunction(){
 for (int i = 0; i < 1; i++) {
	// some code
       int c = 10;
       if(c==10)
         break; // goto stop; in C++
 } // end of for
 // stop: // break moved process to end of for
 


 // next code

}




Editace: 2013-11-10 20:31:20
Počet článků v kategorii: 397
Url:on-orientation-changed-view-button-textview-not-visible-android

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