sample src
ボタンをクリックすると、テキストビューにある数字が+1されます。
main.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <TextView android:id="@+id/number" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="0" /> <Button android:id="@+id/increase" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="追加" /> </LinearLayout>
EventListenerActivity.java
package jp.end0tknr.eventlistener; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.TextView; import android.widget.Button; public class EventListenerActivity extends Activity { private int n=0; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); final Button increase = (Button) findViewById(R.id.increase); increase.setOnClickListener(new OnClickListener(){ public void onClick(View v){ increaseNumber(); } }); } private void increaseNumber(){ final TextView number = (TextView) findViewById(R.id.number); number.setText(Integer.toString(++n)); } }