### oefening 1 ###
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
...
Intent browserIntent = new Intent("android.intent.action.VIEW",
Uri.parse("https://developer.android.com/index.html"));
startActivity(browserIntent);
...
}
Download hier het bestand.
### oefening 2 ###
### activity_main.xml ###
<androidx.constraintlayout.widget...>
...
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Naar tweede scherm"
android:onClick="startSecondActivity"/>
...
</androidx.constraintlayout.widget.ConstraintLayout>
### MainActivity.java ###
public class MainActivity extends AppCompatActivity {
...
public void startSecondActivity(View view) {
Intent intent = new Intent(this, SecondActivity.class);
startActivity(intent);
}
...
}
Download hier het bestand.
### oefening 3 ###
### MainActivity.java ###
public class MainActivity extends AppCompatActivity {
public static final String EXTRA_INFO = "default";
...
public void startSecondActivity(View view) {
...
intent.putExtra(EXTRA_INFO,"Dit bericht komt uit MainActivity");
...
}
...
}
### activity_second.xml ###
<androidx.constraintlayout.widget...>
...
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
...
</androidx.constraintlayout.widget.ConstraintLayout>
### SecondActivity.java ###
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
...
Intent intent = getIntent();
String mededeling = intent.getStringExtra(MainActivity.EXTRA_INFO);
TextView textView = (TextView) findViewById(R.id.textView);
textView.setText(mededeling);
...
}
Download hier het bestand.