两次单击后如何使工作正常
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我正在尝试为android创建一个应用程序，我想我需要使该程序获得一个点的（X，Y）值，然后又一次单击获得另一个值，这样我就可以在用户的两点之间绘制一条线点击。如果有更好的方法来获取X，Y信息，那么我想知道。谢谢。
final View touchView = findViewById(R.id.touchView);
touchView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
String.valueOf(event.getX() + String.valueOf(event.getY()));
double x = event.getX();
double y = event.getY();
return true;
}
});
没有找到相关结果
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2 个回复
古擅坛犯
public class MyActivity extends Activity implements View.OnTouchListener { int touchCount = 0; double startX, startY, endX, endY; View touchView = null; ... @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Set content view on the next line to whatever your // layout XML file is. For example main.xml setContentView(R.layout.main); touchView = findViewById(R.id.touchView); touchView.setOnTouchListener(this); } @Override public boolean onTouch(View v, MotionEvent event) { if (v.equals(touchView)) { if (touchCount == 0) { startX = event.getX(); startY = event.getY(); touchCount++; } else { endX = event.getX(); endY = event.getY(); touchCount = 0; DrawLine(); } return true; } return false; } private void DrawLine() { // Process the start / end X,Y points to draw a line here } }缮淳彼誊
double x1 = null; double y1 = null; double x2 = null; double y2 = null; final View touchView = findViewById(R.id.touchView); touchView.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { String.valueOf(event.getX() + String.valueOf(event.getY())); if (x1 == null) { x1 = event.getX(); y1 = event.getY(); } else { x2 = event.getX(); y2 = event.getY(); } // draw a line between x1,y1 and x2,y2 here... return true; } });