>>154
流石に3行は厳しいのでは

こんな感じだとどうでしょう？
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public class TestActivity extends Activity implements OnClickListener, OnLongClickListener {
private final void registListener(int id) {
final View target = findViewById(id);
if (target == null) {
return;
}

target.setOnClickListener(this);
target.setOnLongClickListener(this);
}

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
registListener(R.id.button01);
(略)
registListener(R.id.button15);
}
(略)
}
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