https://wiki.nonip.net/index.php?action=history&feed=atom&title=Android%2F%E5%9B%B3%E5%BD%A2view 2026-04-24T21:01:46Z このウィキのこのページに関する変更履歴 MediaWiki 1.24.2 https://wiki.nonip.net/index.php?title=Android/%E5%9B%B3%E5%BD%A2view&diff=4&oldid=prev 2015-05-19T17:58:24Z

<p>ページの作成:「==独自View== onDrawが自動で実行され描画される。 *src/TestActivity.java public class TestActivity extends Activity { @Override public void onCrea...」</p> <p><b>新規ページ</b></p><div>==独自View==<br /> onDrawが自動で実行され描画される。<br /> <br /> *src/TestActivity.java<br /> public class TestActivity extends Activity {<br /> @Override<br /> public void onCreate(Bundle savedInstanceState) {<br /> super.onCreate(savedInstanceState);<br /> MyCircleView view = new MyCircleView(getApplicationContext());<br /> setContentView(view);<br /> }<br /> }<br /> *src/MyCircleView.java<br /> class MyCircleView extends View {<br /> public MyCircleView(Context context) {<br /> super(context);<br /> setFocusable(true);<br /> }<br /> protected void onDraw(Canvas canvas) {<br /> super.onDraw(canvas);<br /> canvas.drawColor(Color.WHITE);<br /> Paint paint = new Paint();<br /> paint.setAntiAlias(true);<br /> paint.setStyle(Paint.Style.FILL);<br /> paint.setColor(Color.BLUE);<br /> canvas.drawCircle(150, 150, 100, paint);<br /> }<br /> }<br /> <br /> viewのonDrawはview.invalidate()で呼び出せる。<br /> <br /> ==参照==<br /> http://www.hakkaku.net/articles/20090206-341</div>

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