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如何让我的 textview 检测是否在其表面上绘制了一个圆圈?帮助会很大。
非常感谢。-米切尔
您必须将 GestureOverlayView 添加到您的应用程序。
Android 开发者网站上有一个很好的手势演练:http: //developer.android.com/training/gestures/detector.html