Android安卓开发经典设计学习例程源代码-TouchCircle.rar

package tjuci.edu.dl; import tjuci.edu.dl.customview.MyView; import android.app.Activity; import android.os.Bundle; import android.view.MotionEvent; import android.view.View; import android.view.View.OnTouchListener; import android.widget.LinearLayout; public class TouchCircleActivity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); //得到线性布局的容器 LinearLayout layout =(LinearLayout)findViewById(R.id.root); //创建出自定义的View final MyView myView = new MyView(this);//this指上下文 //设置自定义组建的最大宽度和最大高度 myView.setMinimumHeight(300); myView.setMinimumWidth(300); myView.setOnTouchListener(new OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { //设置位置 myView.current_x = (int)event.getX(); myView.current_y = (int)event.getY(); //设置位置之后开始重新画 myView.invalidate(); //返回true则表明已经处理了本事件 return true; } }); layout.addView(myView); } }