second class - not found

königdmx · by **königdmx** » Wed Feb 27, 2008 1:24 pm

Hi,

I have tested a little application, which call from a first class a method owned by a second class. Hier is the code:

first class:

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import android.app.Activity;
 
import android.os.Bundle;
 
public class Erste extends Activity {
 
        @Override
 
        public void onCreate(Bundle icicle) {
 
        super.onCreate(icicle);
 
        Zweite zweite = new Zweite();
 
        zweite.drucken();
 
    }
 
}
 
Parsed in 0.031 seconds,  using GeSHi 1.0.8.4

second class:

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import android.app.Activity;
 
import android.os.Bundle;
 
import android.widget.TextView;
 
public class Zweite extends Activity {
 
        private int counter;
 
    @Override
 
    public void onCreate(Bundle icicle) {
 
        super.onCreate(icicle);
 
        counter = 10;
 
    }
 
    public void drucken (){
 
        TextView tv = new TextView(this);
 
        tv.setText("\n\nWelcome to the World of ... (counter: " + counter + ")");
 
        setContentView(tv);
 
    }
 
}
 
Parsed in 0.031 seconds,  using GeSHi 1.0.8.4

the xml-file:

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<?xml version="1.0" encoding="utf-8"?>
 
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
 
    package="com.android.ANDJ">
 
    <application android:icon="@drawable/icon">
 
        <activity android:name=".Erste" android:label="@string/app_name">
 
            <intent-filter>
 
                <action android:name="android.intent.action.MAIN" />
 
                <category android:name="android.intent.category.LAUNCHER" />
 
            </intent-filter>
 
        </activity>
 
        <activity android:name=".Zweite" android:label="@string/app_name">
 
            <intent-filter>
 
                <action android:name="android.intent.action.MAIN" />
 
                <category android:name="android.intent.category.LAUNCHER" />
 
            </intent-filter>
 
        </activity>
 
    </application>
 
</manifest> 
 
Parsed in 0.004 seconds,  using GeSHi 1.0.8.4

when I start the debug-mode, the display on emulator stay black, but I can see the application name. Eclipse opens the "Class File Editor - Source not found" ActivityThread.class..

Whats my problem??
Thx

plusminus · by **plusminus** » Wed Feb 27, 2008 1:32 pm

Hello königdmx

other Activities are started using Intents, not using the Constructor!

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          /* Create intent which will finally start the "Zweite"-Activity. */
 
          Intent myStarterIntent = new Intent(this, Zweite.class);
 
          /* Send the Intent to the OS. */
 
          this.startActivity(myStarterIntent); 
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Additionally when you write :darrow:

to ".Zweite" in AndroidManifest.xml, it will be launchable from "outside".

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                <action android:name="android.intent.action.MAIN" />
 
                <category android:name="android.intent.category.LAUNCHER" /> 
Parsed in 0.001 seconds,  using GeSHi 1.0.8.4

This is what you should write instead:

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                <action android:name="android.intent.action.DEFAULT" />
 
                <category android:name="android.intent.category.VIEW" />
Parsed in 0.001 seconds,  using GeSHi 1.0.8.4

I suggest to read:
http://www.anddev.org/viewtopic.php?t=99
and after that:
http://www.anddev.org/viewtopic.php?t=305

Regards,
plusminus

königdmx · by **königdmx** » Wed Feb 27, 2008 1:37 pm

thank you plusminus!!
it works..

second class - not found

second class - not found

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