Events on buttons

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How do I place event in buttons to call another screen on Android? I’m using the Intent, but I’m not getting it.

android
  • 2

    Edit the question and show the code you tried, please.

  • 1

    Be a little clearer, your question is on the part of creating an event or specifically on how to call another screen?

1 answer

6


Suppose you have two Activities, to AtividadeA and the AtividadeB, and that the AtividadeA will have a button that will call the AtividadeB.

It works that way:

1) In the layout of your first Activity (which possibly has the name of activity_main.xml) you include a button (Button) with a id...

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

    <Button
        android:id="@+id/meuBotao"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Clique em mim"/>

</LinearLayout>

2) In your Activity you declare a button...

private Button botao;

3) In the method onCreate(Bundle savedInstanceState) you initialize the button and associate with it a View.OnClickListener...

setContentView(R.layout.activity_main);
botao = (Button)findViewById(R.id.meuBotao);
botao.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        Intent intent = new Intent(AtividadeA.this, AtividadeB.class);
        startActivity(intent);
    }
});

4) Don’t forget to declare both activities on Androidmanifest.xml:

<application>

    ...

    <activity android:name="AtividadeA">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

    <activity android:name="AtividadeB" />

    ...

</application>

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