ClassCastException fragments.MainActivity must implement OnHeadlineSelectedListener
Problem:
You have two class with similar names HeadLinesFragment and HeadMyLinesFragment with OnHeadlineSelectedListener.
Check if call correct class in MainActivity.
For example if use HeadMyLinesFragment change implement to HeadMyLinesFragment too!
You have two class with similar names HeadLinesFragment and HeadMyLinesFragment with OnHeadlineSelectedListener.
Check if call correct class in MainActivity.
For example if use HeadMyLinesFragment change implement to HeadMyLinesFragment too!
public class MainActivity extends FragmentActivity
implements HeadLinesFragment.OnHeadlineSelectedListener {
// wrong implements you need correct class name
//implements HeadMyLinesFragment.OnHeadlineSelectedListener
//............
HeadMyLinesFragment firstFragment = new HeadMyLinesFragment(); // because in code using HeadMyLinesFragment
396LW NO topic_id
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Další témata ....(Topics)
Download file from Android device using Android Studio
stackoverflow.com/questions/34603355/android-device-monitor-data-folder-is-empty- android.com/studio Start Android Studio
- Root device by Your Android model. This example is for 4.4 kingoapp.com/root-tutorials/how-to-root-android-4.4.htm
- Open command prompt console: Start -> Command prompt
- Write path to ADB plus command, and set chmod for every folder on path to apliccations database, for example: (user is Your name|nick!!!! shell@Kraft-A6000:/ is Your device, this is Lenovo A6000, may be different!!!!)
- Every dot is one line in Command prompt console!!!!! Dont write (press Enter) or (Enter). Dont brake line between root@Kraft-A6000:/ # and (Enter)!
C:\Users\user>c:\Users\user\AppData\Local\Android\sdk\platform-tools\adb shell (press Enter)
shell@Kraft-A6000:/ $
shell@Kraft-A6000:/ $ su (Enter)
root@Kraft-A6000:/ #
root@Kraft-A6000:/ # su -c "chmod 777 /data" (Enter)
root@Kraft-A6000:/ # su -c "chmod 777 /data/data" (Enter)
root@Kraft-A6000:/ # su -c "chmod 777 /data/data/com.your_package" (Enter)
root@Kraft-A6000:/ # su -c "chmod 777 /data/data/com.your_package/databases" (Enter)
root@Kraft-A6000:/ # su -c "chmod 777 /data/data/com.your_package/databases/database_name.db" (Enter)
- Open Android Studio -> Tools -> Android -> Android Device Monitor (meybe some message box, minimalize all windows to find message box - close message box )
- Pull data from Explorer
Date: 13.07.2020 - 08:23
Code look up at the Api Demos
android_fragments arguments attributes - three fragments on screen
android_fragments_alert_dialog
android_fragments_context_menu
android_fragments_custom_animation
android_fragments_dialog
android_fragments_dialog_or_activity
fragment_hide_show
fragment_layout
fragments_list_array
fragment_menu
android_fragments_get_result_from_fragment and tabs in two rows
android_fragments_recive_result
android_fragments_stack
fragment_tabs
android_fragments arguments attributes - three fragments on screen
android_fragments_alert_dialog
android_fragments_context_menu
android_fragments_custom_animation
android_fragments_dialog
android_fragments_dialog_or_activity
fragment_hide_show
fragment_layout
fragments_list_array
fragment_menu
android_fragments_get_result_from_fragment and tabs in two rows
android_fragments_recive_result
android_fragments_stack
fragment_tabs
RadioButton RadioGroup Android example source code for Android developer
Example for *.xml files
Example for *.java files
Example for *.xml files
<RadioGroup android:id="@+id/idRadio_group"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:orientation="vertical">
<RadioButton android:id="@+id/idRadio_1"
android:text="@string/textLabel_1"/>
<RadioButton android:id="@+id/idRadio_2"
android:text="@string/textLabel_2"/>
<RadioButton android:id="@+id/idRadio_3"
android:text="@string/textLabel_3"/>
</RadioGroup>
Example for *.java files
// import
import android.widget.RadioGroup;
// get handle of RadioGroup
RadioGroup mRadioGroup = (RadioGroup) findViewById(R.id.idRadio_group);
// which RadioButton is selected for example in some function body
int nUnits = 10; // decimetry
int nIdRadio = mRadioGroup.getCheckedRadioButtonId();
if(nIdRadio == R.id.idRadio_1) nUnits = 1; // metr
else if(nIdRadio == R.id.idRadio_2) nUnits = 10; // decimetr
else if(nIdRadio == R.id.idRadio_3) nUnits = 100; // cm
else if(nIdRadio == R.id.idRadio_4) nUnits = 1000; // mm
// listener for RadioGroup Java Android example
mRadioGroup.setOnCheckedChangeListener(
new RadioGroup.OnCheckedChangeListener() {
public void onCheckedChanged(RadioGroup group,
int checkedId) {
Log.v("Selected", "New radio item selected: " + checkedId);
recordNewUIState();
}
});
HTC Desire HD cena od 7 000 KCZ Kč (únor.2012)
HTC Desire HD je chytrý telefon běžící na operačním systému Android.
HTC Desire HD je (22.února2012) druhým nejpoužívanějším chytrým telefonem u programu Sky Map viz tabulka.
Smartphone má hliníkový unibody design, vybaven je Androidem 2.2 (Froyo) a HTC Sense displayem. Na zadní straně jsou dvě plastové krytky, jedna obsahuje baterii, druhá SIM kartu a paměťovou kartu microSDHC. Telefon je vybaven 4,3 palcovým WVGA LCD TFT dotykovým displayem, 8 megapixelovým fotoaparátem (lze nahrávat 720p video), podpora pro HSPA / W-CDMA a quad-band GSM / GPRS / EDGE.
Telefon je vybaven 1 GHz CPU Scorpion MSM8255 procesorem. Tato druhá generace Snapdragon procesoru má nízkou spotřebu energie.
HTC HD má 768 MB RAM a 1,5 GB interní paměti flash. K dispozici je také slot pro microSDHC / XC kartu s kapacitou až 32 GB dat.
HTC Desire HD photo pic image
Zdroj obrázku: wikipedia
HTC Desire HD je chytrý telefon běžící na operačním systému Android.
HTC Desire HD je (22.února2012) druhým nejpoužívanějším chytrým telefonem u programu Sky Map viz tabulka.
Smartphone má hliníkový unibody design, vybaven je Androidem 2.2 (Froyo) a HTC Sense displayem. Na zadní straně jsou dvě plastové krytky, jedna obsahuje baterii, druhá SIM kartu a paměťovou kartu microSDHC. Telefon je vybaven 4,3 palcovým WVGA LCD TFT dotykovým displayem, 8 megapixelovým fotoaparátem (lze nahrávat 720p video), podpora pro HSPA / W-CDMA a quad-band GSM / GPRS / EDGE.
Telefon je vybaven 1 GHz CPU Scorpion MSM8255 procesorem. Tato druhá generace Snapdragon procesoru má nízkou spotřebu energie.
HTC HD má 768 MB RAM a 1,5 GB interní paměti flash. K dispozici je také slot pro microSDHC / XC kartu s kapacitou až 32 GB dat.
HTC Desire HD photo pic image
Zdroj obrázku: wikipedia
public class ApokusActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(new SampleView(this));
}
private static class SampleView extends View {
// CONSTRUCTOR
public SampleView(Context context) {
super(context);
setFocusable(true);
}
@Override
protected void onDraw(Canvas canvas) {
Paint paint = new Paint();
canvas.drawColor(Color.GREEN);
Bitmap b = Bitmap.createBitmap(200, 200, Bitmap.Config.ALPHA_8);
paint.setColor(Color.BLUE);
Shader mShader = new LinearGradient(0, 0, 100, 70, new int[] {
Color.RED, Color.GREEN, Color.BLUE },
null, Shader.TileMode.MIRROR); // CLAMP MIRROR REPEAT
Canvas c = new Canvas(b);
paint.setShader(mShader);
//c.drawCircle(60, 60, 30, paint);
c.drawRect(0, 0, 200, 200, paint);
canvas.drawBitmap(b, 10,10, paint);
}
}
}
Editace: 2016-04-01 12:06:43
Počet článků v kategorii: 396
Url:classcastexception-fragments-mainactivity-must-implement-onheadlineselectedlistener