摘要：
public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activi... 阅读全文
摘要：
import android.graphics.Color; import android.graphics.Matrix; import android.graphics.Paint; import android.view.Menu; import android.view.MotionEvent; import android.view.View; import android.view.... 阅读全文