NullPointerException mit String-Array in Spinner
Erste App und so richtig neu bei Android (vor ca. einem Jahr rumgespielt, aber es kam nichts dabei heraus), ordentliches Programmieren. Möchten Sie sicherstellen, dass die App auf einem Telefon gerendert wird und keine Funktionalität atm. Kompiliert gut, keine Probleme da. Schiebe es auf mein Handy und "Leider hat Splitr aufgehört".
Bearbeiten - hinzugefügt zu MainActivity.java, Änderungen haben * vor und nach (nicht im aktuellen Code), aber jetzt werden sie markiert
adapter.setDropDownViewResource(android.R.layout.activity_main);
// Apply the adapter to the spinner
spinnerSplit.setAdapter(adapter);
Sprichwort Fehler: (18, 36) Bezeichner erwartet
setDropDownViewResource, activity_main und setAdapter sind alle rot
Android Studio
Moto G - CM11 4.4.4
Hier ist der Code, lass es mich wissen, wenn ich etwas verpasst habe.
MainActivity.java
package com.hydr0dr4gon.splitrv2;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
*import android.widget.ArrayAdapter;
import android.widget.Spinner;*
public class MainActivity extends Activity {
*Spinner spinnerSplit = (Spinner) findViewById(R.id.spinner);
// Create an ArrayAdapter using the string array and a default spinner layout
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
R.array.arraySplitr, android.R.layout.simple_spinner_item);
// Specify the layout to use when the list of choices appears
adapter.setDropDownViewResource(android.R.layout.activity_main);
// Apply the adapter to the spinner
spinnerSplit.setAdapter(adapter);*
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
SplitrDialogFragment.java
package com.hydr0dr4gon.splitrv2;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.content.DialogInterface;
import android.os.Bundle;
public class SplitrDialogFragment extends DialogFragment {
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the Builder class for convenient dialog construction
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setMessage(R.string.dialog_split_pay)
.setNegativeButton(R.string.OK, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// User cancelled the dialog
}
});
// Create the AlertDialog object and return it
return builder.create();
}
}
Strings.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">Splitr</string>
<string name="hello_world">Hello world!</string>
<string name="action_settings">Settings</string>
<string name="btnSplit">Split</string>
<string name="btnTip">+ Tip</string>
<string name="txtSplit">Split By</string>
<string name="txtHint">Enter Bill Total</string>
<string name="spinnerSplit">No. of People</string>
<string name="dialog_split_pay">Each Person Pays</string>
<string name="OK">OK</string>
<array name="arraySplitr">
<item>2</item>
<item>3</item>
<item>4</item>
<item>5</item>
<item>6</item>
<item>7</item>
<item>8</item>
<item>9</item>
<item>10</item>
</array>
actvity_main.xml
RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context="com.hydr0dr4gon.splitr.MainActivity">
<TableLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true"
android:paddingLeft="40dp"
android:paddingTop="80dp"
android:paddingRight="40dp"
android:paddingBottom="80dp">
<TableRow
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_span="2"
android:inputType="number"
android:ems="10"
android:id="@+id/editText"
android:layout_column="0"
android:layout_weight="1.5"
android:hint="@string/txtHint" />
</TableRow>
<TableRow
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:text="@string/txtSplit"
android:id="@+id/txtSplit"
android:layout_weight="1"
android:textSize="32dp"
android:textAlignment="center"
android:gravity="center" />
<Spinner
android:layout_width="0dp"
android:layout_height="match_parent"
android:id="@+id/spinner"
android:layout_weight="1"
android:spinnerStyle="@android:style/Widget.Spinner.DropDown"
android:textAlignment="center"
android:entries="@array/arraySplitr"
android:prompt="@string/spinnerSplit"/>
</TableRow>
<TableRow
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<Button
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="@string/btnTip"
android:id="@+id/btnTip"
android:layout_weight="1" />
<Button
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="@string/btnSplit"
android:id="@+id/btnSplit"
android:layout_weight="1" />
</TableRow>
</TableLayout>
logcat
> 07-11 21:18:50.899 10290-10290/com.hydr0dr4gon.splitrv2 D/ActivityThread﹕ handleBindApplication:com.hydr0dr4gon.splitrv2
07-11 21:18:50.899 10290-10290/com.hydr0dr4gon.splitrv2 D/ActivityThread﹕ setTargetHeapUtilization:0.75
07-11 21:18:50.899 10290-10290/com.hydr0dr4gon.splitrv2 D/ActivityThread﹕ setTargetHeapMinFree:2097152
07-11 21:18:51.198 10290-10290/com.hydr0dr4gon.splitrv2 D/AndroidRuntime﹕ Shutting down VM
07-11 21:18:51.206 10290-10290/com.hydr0dr4gon.splitrv2 E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.hydr0dr4gon.splitrv2, PID: 10290
java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.Object.toString()' on a null object reference
at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:394)
at android.widget.ArrayAdapter.getView(ArrayAdapter.java:362)
at android.widget.AbsSpinner.onMeasure(AbsSpinner.java:193)
at android.widget.Spinner.onMeasure(Spinner.java:482)
at android.view.View.measure(View.java:16521)
at android.widget.TableRow.getColumnsWidths(TableRow.java:312)
at android.widget.TableLayout.findLargestCells(TableLayout.java:508)
at android.widget.TableLayout.measureVertical(TableLayout.java:473)
at android.widget.TableLayout.onMeasure(TableLayout.java:439)
at android.view.View.measure(View.java:16521)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:719)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:455)
at android.view.View.measure(View.java:16521)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:16521)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at com.android.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:327)
at android.view.View.measure(View.java:16521)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2552)
at android.view.View.measure(View.java:16521)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1912)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1109)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1291)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:996)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5600)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
at android.view.Choreographer.doCallbacks(Choreographer.java:574)
at android.view.Choreographer.doFrame(Choreographer.java:544)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5137)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:611)
Vielen Dank.