Próbuje napisac prosty program na androida, bazując w większości na tutorialach z netu i stron androida. Chce dodać 2 zakładki w tabhost i dostaje FATAL EXCEPTION.
Jeżeli wykomentujemy 2 wywołania tabHost.addTab(), NPE znika.
BArdzo prosze o pomoc, siedzę nad tym już II dzień, nie mam pojęcia co jest źle;/
LOGI z ECLIPSE:
11-17 21:40:16.771: D/AndroidRuntime(1423): Shutting down VM
11-17 21:40:16.771: W/dalvikvm(1423): threadid=1: thread exiting with uncaught exception (group=0x40015560)
11-17 21:40:16.781: E/AndroidRuntime(1423): FATAL EXCEPTION: main
11-17 21:40:16.781: E/AndroidRuntime(1423): java.lang.RuntimeException: Unable to start activity ComponentInfo{pbar.swimtrainer/pbar.swimtrainer.SwimTrainerActivity}: java.lang.NullPointerException
11-17 21:40:16.781: E/AndroidRuntime(1423): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
11-17 21:40:16.781: E/AndroidRuntime(1423): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
11-17 21:40:16.781: E/AndroidRuntime(1423): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
11-17 21:40:16.781: E/AndroidRuntime(1423): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
11-17 21:40:16.781: E/AndroidRuntime(1423): at android.os.Handler.dispatchMessage(Handler.java:99)
11-17 21:40:16.781: E/AndroidRuntime(1423): at android.os.Looper.loop(Looper.java:123)
11-17 21:40:16.781: E/AndroidRuntime(1423): at android.app.ActivityThread.main(ActivityThread.java:3683)
11-17 21:40:16.781: E/AndroidRuntime(1423): at java.lang.reflect.Method.invokeNative(Native Method)
11-17 21:40:16.781: E/AndroidRuntime(1423): at java.lang.reflect.Method.invoke(Method.java:507)
11-17 21:40:16.781: E/AndroidRuntime(1423): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
11-17 21:40:16.781: E/AndroidRuntime(1423): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
11-17 21:40:16.781: E/AndroidRuntime(1423): at dalvik.system.NativeStart.main(Native Method)
11-17 21:40:16.781: E/AndroidRuntime(1423): Caused by: java.lang.NullPointerException
11-17 21:40:16.781: E/AndroidRuntime(1423): at android.widget.TabHost.addTab(TabHost.java:212)
11-17 21:40:16.781: E/AndroidRuntime(1423): at pbar.swimtrainer.SwimTrainerActivity.onCreate(SwimTrainerActivity.java:32)
11-17 21:40:16.781: E/AndroidRuntime(1423): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
11-17 21:40:16.781: E/AndroidRuntime(1423): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
11-17 21:40:16.781: E/AndroidRuntime(1423): ... 11 more
kody:
KLASA GŁÓWNA
package pbar.swimtrainer;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TabHost;
import android.widget.TabHost.TabSpec;
public class SwimTrainerActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
TabHost tabHost = (TabHost)findViewById(android.R.id.tabhost);
TabSpec firstTabSpec = tabHost.newTabSpec("tid1");
TabSpec secondTabSpec = tabHost.newTabSpec("tid2");
firstTabSpec.setIndicator("First Tab Name").setContent(new Intent(this,AddRecord.class));
secondTabSpec.setIndicator("Second Tab Name").setContent(new Intent(this,Statistics.class));
tabHost.addTab(firstTabSpec);
tabHost.addTab(secondTabSpec);
}
}//class
PIERWSZA ZAKŁADKA
package pbar.swimtrainer;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
public class AddRecord extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
/* First Tab Content */
TextView textView = new TextView(this);
textView.setText("First Tab");
setContentView(textView);
}
}
DRUGA ZAKŁADKA
package pbar.swimtrainer;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
public class Statistics extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
/* Second Tab Content */
TextView textView = new TextView(this);
textView.setText("Second Tab");
setContentView(textView);
}
}
MAIN.XML
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TabHost
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<LinearLayout
android:id="@+id/LinearLayout01"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TabWidget
android:id="@android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
</TabWidget>
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
</FrameLayout>
</LinearLayout>
</TabHost>
</LinearLayout>
ANDROIDMANIFEST.XML
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="pbar.swimtrainer"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:label="@string/app_name"
android:name=".SwimTrainerActivity" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".AddRecord"
android:label="@string/app_name"
android:theme="@android:style/Theme.NoTitleBar">
</activity>
<activity android:name=".Statistics"
android:label="@string/app_name"
android:theme="@android:style/Theme.NoTitleBar">
</activity>
</application>
</manifest>