구글맵 위에 그림을 그리려고 하는데 에러가 발생합니다.

이희수

https://www.androidpub.com/android_dev_qna/33770

2009.10.16 17:36:40

4624

소스코드 자체에 에러는 없는 g1에서 실행시키면 실행되지 않습니다
g1은 업그레이드 시켜서 1.5버전이구요
SDK버전도 1.5입니다.
밑에 canvas.Path가 문제인 것 같은데 설명 부탁드립니다.

package Messenger.com;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Point;
import android.graphics.RectF;
import android.location.Location;
import android.view.MotionEvent;

import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapView;
import com.google.android.maps.Overlay;
import com.google.android.maps.Projection;

public class MyPositionOverlay extends Overlay {

Location location;

private final int mRadius = 5;

private float mX, mY;
private static final float TOUCH_TOLERANCE = 4;

private Bitmap mBitmap;
private Canvas mCanvas;
private Path mPath;
private Paint mBitmapPaint;
private Bitmap src;
private Paint mPaint;

public void init() {
  mBitmap = Bitmap.createBitmap(320, 480, Bitmap.Config.ARGB_8888);
  mCanvas = new Canvas(mBitmap);
  mPath = new Path();
  mBitmapPaint = new Paint(Paint.DITHER_FLAG);

  mPaint = new Paint();
  mPaint.setAntiAlias(true);
  mPaint.setDither(true);
  mPaint.setColor(0xFF246165);
  mPaint.setStyle(Paint.Style.STROKE);
  mPaint.setStrokeJoin(Paint.Join.ROUND);
  mPaint.setStrokeCap(Paint.Cap.ROUND);
  mPaint.setStrokeWidth(12);
}

/** Get the position location */
public Location getLocation() {
return location;
}

/** Set the position location */
public void setLocation(Location location) {
this.location = location;
}

private void touch_start(float x, float y) {
// System.out.println("onClick");

  mPath.reset();
  mPath.moveTo(x, y);
  mX = x;
  mY = y;
}

private void touch_move(float x, float y) {
System.out.println("onClick");

  float dx = Math.abs(x - mX);
  float dy = Math.abs(y - mY);
  if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) {
   mPath.quadTo(mX, mY, (x + mX) / 2, (y + mY) / 2);
   mX = x;
   mY = y;
  }
}

@Override
public void draw(Canvas canvas, MapView mapView, boolean shadow) {
  Projection projection = mapView.getProjection();

  if (shadow == false) {
   // Get the current location
   Double latitude = location.getLatitude() * 1E6;
   Double longitude = location.getLongitude() * 1E6;
   GeoPoint geoPoint = new GeoPoint(latitude.intValue(), longitude
     .intValue());

   // Convert the location to screen pixels
   Point point = new Point();
   projection.toPixels(geoPoint, point);

RectF oval = new RectF(point.x - mRadius, point.y - mRadius,
point.x + mRadius, point.y + mRadius);

   // Setup the paint
   Paint paint = new Paint();
   paint.setARGB(255, 255, 255, 255);
   paint.setAntiAlias(true);
   paint.setFakeBoldText(true);

   Paint backPaint = new Paint();
   backPaint.setARGB(180, 50, 50, 50);
   backPaint.setAntiAlias(true);

RectF backRect = new RectF(point.x + 2 + mRadius, point.y - 3
* mRadius, point.x + 65, point.y + mRadius);

   // Draw the marker
   canvas.drawOval(oval, paint);
   canvas.drawRoundRect(backRect, 5, 5, backPaint);
   canvas.drawText("Here I Am", point.x + 2 * mRadius, point.y, paint);
   canvas.drawPath(mPath, backPaint);
  }
  super.draw(canvas, mapView, shadow);
}

private void touch_up() {
System.out.println("onClick");

  mPath.lineTo(mX, mY);
  // commit the path to our offscreen
  mCanvas.drawPath(mPath, mPaint);
  // kill this so we don't double draw
  mPath.reset();
}

// @Override
public boolean onTouchEvent(android.view.MotionEvent event, MapView mapView) {
System.out.println("onClick");

float x = event.getX();
float y = event.getY();

  switch (event.getAction()) {
  case MotionEvent.ACTION_DOWN:
   touch_start(x, y);
   //invalidate();
   break;
  case MotionEvent.ACTION_MOVE:
   touch_move(x, y);
   //invalidate();
   break;
  case MotionEvent.ACTION_UP:
   touch_up();
   //invalidate();
   break;
  }
  return true;
}

@Override
public boolean onTap(GeoPoint point, MapView mapView) {
  return false;
}
}

로그캣의 에러에 대한 부분입니다
10-16 03:34:04.588: ERROR/AndroidRuntime(26215): Uncaught handler: thread main exiting due to uncaught exception
10-16 03:34:04.738: DEBUG/dalvikvm(26215): GC freed 9811 objects / 683000 bytes in 132ms
10-16 03:34:04.738: ERROR/AndroidRuntime(26215): java.lang.NullPointerException
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at android.graphics.Canvas.drawPath(Canvas.java:937)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at Messenger.com.MyPositionOverlay.draw(MyPositionOverlay.java:115)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at com.google.android.maps.Overlay.draw(Overlay.java:179)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at com.google.android.maps.OverlayBundle.draw(OverlayBundle.java:45)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at com.google.android.maps.MapView.onDraw(MapView.java:471)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at android.view.View.draw(View.java:5838)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at android.view.ViewGroup.drawChild(ViewGroup.java:1486)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1228)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at android.view.ViewGroup.drawChild(ViewGroup.java:1484)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1228)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at android.view.ViewGroup.drawChild(ViewGroup.java:1484)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1228)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at android.view.View.draw(View.java:5841)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at android.widget.FrameLayout.draw(FrameLayout.java:352)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at android.view.ViewGroup.drawChild(ViewGroup.java:1486)

10-16 03:34:05.498: ERROR/ProtoRequestListener(60): requestFailed()
10-16 03:34:05.498: ERROR/ProtoRequestListener(60): java.net.UnknownHostException: Host is unresolved: www.google.com:80
10-16 03:34:05.498: ERROR/ProtoRequestListener(60):     at java.net.Socket.connect(Socket.java:1002)
10-16 03:34:05.498: ERROR/ProtoRequestListener(60):     at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:117)
10-16 03:34:05.498: ERROR/ProtoRequestListener(60):     at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:129)
10-16 03:34:05.498: ERROR/ProtoRequestListener(60):     at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
10-16 03:34:05.498: ERROR/ProtoRequestListener(60):     at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
10-16 03:34:05.498: ERROR/ProtoRequestListener(60):     at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:348)
10-16 03:34:05.498: ERROR/ProtoRequestListener(60):     at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
10-16 03:34:05.498: ERROR/ProtoRequestListener(60):     at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
10-16 03:34:05.498: ERROR/ProtoRequestListener(60):     at com.google.common.io.android.AndroidHttpClient.execute(Unknown Source)
10-16 03:34:05.498: ERROR/ProtoRequestListener(60):     at com.google.common.io.android.GoogleHttpClient.executeWithoutRewriting(Unknown Source)
10-16 03:34:05.498: ERROR/ProtoRequestListener(60):     at com.google.common.io.android.GoogleHttpClient.execute(Unknown Source)
10-16 03:34:05.498: ERROR/ProtoRequestListener(60):     at com.google.common.io.android.GoogleHttpClient.execute(Unknown Source)
10-16 03:34:05.498: ERROR/ProtoRequestListener(60):     at com.google.common.io.android.AndroidHttpConnectionFactory$AndroidGoogleHttpConnection.getResponse(Unknown Source)
10-16 03:34:05.498: ERROR/ProtoRequestListener(60):     at com.google.common.io.android.AndroidHttpConnectionFactory$AndroidGoogleHttpConnection.getResponseCode(Unknown Source)
10-16 03:34:05.498: ERROR/ProtoRequestListener(60):     at com.google.common.async.AsyncHttpRequestFactory$AsyncHttpRequestImpl.run(Unknown Source)
10-16 03:34:05.498: ERROR/ProtoRequestListener(60):     at com.google.common.async.AsyncHttpRequestFactory.run(Unknown Source)
10-16 03:34:05.498: ERROR/ProtoRequestListener(60):     at com.google.common.lang.ThreadFactory$ThreadImpl.run(Unknown Source)

10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1228)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at android.view.ViewGroup.drawChild(ViewGroup.java:1484)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1228)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at android.view.View.draw(View.java:5841)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at android.widget.FrameLayout.draw(FrameLayout.java:352)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1847)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at android.view.ViewRoot.draw(ViewRoot.java:1217)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at android.view.ViewRoot.performTraversals(ViewRoot.java:1030)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at android.view.ViewRoot.handleMessage(ViewRoot.java:1482)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at android.os.Handler.dispatchMessage(Handler.java:99)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at android.os.Looper.loop(Looper.java:123)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at android.app.ActivityThread.main(ActivityThread.java:3948)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at java.lang.reflect.Method.invokeNative(Native Method)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at java.lang.reflect.Method.invoke(Method.java:521)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:782)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540)
10-16 03:34:04.738: ERROR/AndroidRuntime(26215):     at dalvik.system.NativeStart.main(Native Method)

공지사항을 확인하였습니다.

이 게시물을

2009.10.17 01:26:24

회색

init()이 호출되기 전에 draw가 불리워서 mPath가 제대로초기화되어있지 않은것 같은데요? init()을 어디서 호출하시는지 확인해보시면 될것 같습니다.

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