Frage zu ListViews

[lucien]

Hi ich hab eine Frage zu List Views. Ich versteh das nämlich nicht so ganz, auch wenn ich mir viele Tutorials ansehe.
Also ich hab erst die XML-Klasse der mainactivity

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_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=".MyActivity">

    <EditText
        android:id="@+id/name"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:autoText="true"
        android:text="Name" />
    <EditText
        android:id="@+id/nummer"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/wohnort"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:text="Wohnort" />
    <EditText
        android:id="@+id/wohnort"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/name"
        android:text="Nummer"
        android:layout_toLeftOf="@+id/scrollView"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />



    <Button
        android:id="@+id/kontakt"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Kontakt hinufügen"
        android:layout_below="@+id/nummer"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <ListView
        android:layout_width="wrap_content"
        android:layout_height="fill_parent"
        android:id="@+id/listView"
        android:layout_below="@+id/kontakt"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />


</RelativeLayout>

Dann hab ich die Klasse für list-items

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    xmlns:android="http://schemas.android.com/apk/res/android">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Large Text"
        android:id="@+id/textView"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Large Text"
        android:id="@+id/textView2"
        android:layout_below="@+id/textView"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_toStartOf="@+id/textView3" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Large Text"
        android:id="@+id/textView3"
        android:layout_below="@+id/textView"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true" />
</RelativeLayout>

Wie krieg ich es jetzt hin, dass ein List-Item so aufgebaut ist, wie ich es in der Klasse eingestellt habe?
Und kennt jemand ein gutes, deutschsprachiges Tutorial für den Adapter?

 

[lucien]

Ich hab jetzt ein einfaches ListView erstellt. Diese kann ich jedoch in einem zweiten Tab nicht öffnen.
Die MainActivity

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_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=".MyActivity">

    <EditText
        android:id="@+id/name"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:autoText="true"
        android:hint="Name" />
    <EditText
        android:id="@+id/nummer"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/wohnort"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:hint="Wohnort" />
    <EditText
        android:id="@+id/wohnort"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/name"
        android:hint="Nummer"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />



    <Button
        android:id="@+id/kontakt"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Kontakt hinzufügen"
        android:layout_below="@+id/nummer"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <ListView
        android:layout_width="wrap_content"
        android:layout_height="fill_parent"
        android:id="@+id/listView"
        android:layout_below="@+id/kontakt"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Suche"
        android:id="@+id/suche"
        android:layout_above="@id/listView"
        android:layout_toRightOf="@id/kontakt"
        android:layout_toEndOf="@id/kontakt"
        android:layout_alignRight="@id/listView"
        android:layout_alignEnd="@id/listView" />


</RelativeLayout>

Die SecondActivity

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:weightSum="1">

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/editText"
        android:hint="Suche" />

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/button"
        android:text="Suche" />

    <ListView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/ergebnisse" />

</LinearLayout>

Das list Item:

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    xmlns:android="http://schemas.android.com/apk/res/android">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Large Text"
        android:id="@+id/text_name"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Large Text"
        android:id="@+id/text_nummer"
        android:layout_below="@id/text_name"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Large Text"
        android:id="@+id/text_ort"
        android:layout_below="@id/text_nummer"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true" />
</RelativeLayout>

Der Adapter:

import android.app.ListActivity;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.TextView;

import java.util.LinkedList;
import java.util.List;


public class Adapter2 extends BaseAdapter {
    List<Person> data;
    Context bla;
    LayoutInflater inflater;
    public Adapter2(Context c, List<Person> liste){
        data = liste;
        bla=c;
        inflater=(LayoutInflater)c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    @Override
    public int getCount() {


        return data.size();
    }

    @Override
    public Object getItem(int position) {
        return data.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if(convertView==null){
            convertView=inflater.inflate(R.layout.list_item,parent,false);
        }

        Person person = data.get(position);

        TextView name=(TextView)convertView.findViewById(R.id.text_name);
        TextView nummer=(TextView)convertView.findViewById(R.id.text_nummer);
        TextView ort=(TextView)convertView.findViewById(R.id.text_ort);


        name.setText(person.getName());
        nummer.setText(person.getNummer());
        ort.setText(person.getWohnort());
        return convertView;
    }
}

Die Main-Activity:

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import java.util.ArrayList;
import java.util.List;


public class MyActivity extends Activity implements View.OnClickListener {
    int x=0;
    List<Person> personenListe;
    Person test=new Person("Name","Ort","Nummer");
    Button kontakt;
    Button suche;
    String name;
    String nummer;
    String ort;

    Adapter adapter;
   // Button suche=(Button)findViewById(R.id.suche);
    //dummy.setAdapter(dummy);
    //dummy.setOnClickListener(new AdapterView.OnItemClickListener);
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my);

        kontakt = (Button)findViewById(R.id.kontakt);
        kontakt.setOnClickListener(this);
        suche=(Button)findViewById(R.id.suche);
       suche.setOnClickListener(this);
        personenListe = new ArrayList<Person>();
        ListView anzeige = (ListView)findViewById(R.id.listView);
        adapter = new Adapter(this, personenListe);
        anzeige.setAdapter(adapter);
    }



    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.my, 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);
    }


    @Override
    public void onClick(View v) {
if(v==kontakt) {
    EditText namef = (EditText) findViewById(R.id.name);
    EditText nummerf = (EditText) findViewById(R.id.nummer);
    EditText wohnortf = (EditText) findViewById(R.id.wohnort);

    name = namef.getText().toString();
    nummer = nummerf.getText().toString();
    ort = wohnortf.getText().toString();

    Person person = new Person(name, nummer, ort);
    personenListe.add(person);

    adapter.notifyDataSetChanged();
}
        if(v==suche) {

            Intent i = new Intent( this, ActivityTwo.class );
            i.putExtra("activitytwo", R.layout.activitytwo);
            startActivity(i);
        }



    }

    public List getData(){
        return personenListe;

    }

 }

Die second-Activity:

public class ActivityTwo extends Activity{
   List<Person> personList;
    MyActivity data=new MyActivity();
    Adapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activitytwo);
        personList=data.getData();
        ListView anzeige = (ListView)findViewById(R.id.ergebnisse);
        adapter = new Adapter(this, personList);
        anzeige.setAdapter(adapter);
    }

}

Warum funktioniert der Adapter in der ersten aber nicht in der zweiten Methode?