### oefening 1 ###
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<LinearLayout
android:layout_width="368dp"
android:layout_height="495dp"
android:orientation="vertical"
tools:layout_editor_absoluteX="8dp"
tools:layout_editor_absoluteY="8dp">
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
Download hier het bestand.
### oefening 2 ###
### activity_main.xml ###
<LinearLayout
...
<RadioGroup
android:id="@+id/myRadioGroup"
android:layout_width="254dp"
android:layout_height="123dp" >
<RadioButton
android:id="@+id/radioButtonBeste"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Beste" />
<RadioButton
android:id="@+id/radioButtonMijnheer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Mijnheer" />
<RadioButton
android:id="@+id/radioMevrouw"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Mevrouw" />
</RadioGroup>
<Button
android:id="@+id/button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Bereken leeftijd"
android:onClick="startSecondActivity"/>
...
</LinearLayout>
Download hier het bestand.
### oefening 3 ###
### activity_main2.xml ###
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout...>
...
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
...
</androidx.constraintlayout.widget.ConstraintLayout>
### MainActivity.java ###
public class MainActivity extends AppCompatActivity {
public static final String RADIO_MESSAGE = "aanhef_gebruiker";
private RadioGroup radioGroup;
private String selectedString;
private RadioButton besteId, mevrouwId;
...
public void startSecondActivity (View view) {
// Intent
Intent intent = new Intent(this, Main2Activity.class);
// Aanhef
radioGroup = (RadioGroup) findViewById(R.id.myRadioGroup);
besteId = (RadioButton) findViewById(R.id.radioButtonBeste);
mevrouwId = (RadioButton) findViewById(R.id.radioMevrouw);
int selectedId = radioGroup.getCheckedRadioButtonId();
if (selectedId == besteId.getId()){
selectedString = "Beste";
} else if (selectedId == mevrouwId.getId()){
selectedString = "Mevrouw";
} else {
selectedString = "Mijnheer";
}
intent.putExtra(RADIO_MESSAGE, selectedString);
// Activity starten
startActivity(intent);
}
...
}
### Main2Activity ###
public class Main2Activity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
...
Intent intent = getIntent();
String aanhef = intent.getStringExtra(MainActivity.RADIO_MESSAGE);
TextView textView = (TextView) findViewById(R.id.textView);
textView.setText(aanhef);
...
}
}
Download hier het bestand.