第三方地图与Android Auto Cars Library的集成

问题描述

我正在为我的beta版导航应用程序集成Android Auto Car Library。我已经成功实现了导航模板，但是由于无法使用画布绘制自己的地图，因此只能集成第三方地图sdk（例如此处的地图，地图框等），

if (mSurface == null || !mSurface.isValid()) {
  // Surface is not available,or has been destroyed,skip this frame.
  return;
}
Canvas canvas = mSurface.lockCanvas(null);

// Clear the background.
canvas.drawColor(mCarContext.isDarkMode() ? Color.DKGRAY : Color.LTGRAY);

final int horizontalTextMargin = 10;
final int verticalTextMarginFromTop = 20;
final int verticalTextMarginFromBottom = 10;

// Draw a rectangle showing the inset.
Rect visibleArea = mVisibleArea;
if (visibleArea != null) {
  if (visibleArea.isEmpty()) {
    // No inset set. The entire area is considered safe to draw.
    visibleArea.set(0,canvas.getWidth() - 1,canvas.getHeight() - 1);
  }

  canvas.drawRect(visibleArea,mLeftInsetPaint);
  canvas.drawLine(
      visibleArea.left,visibleArea.top,visibleArea.right,visibleArea.bottom,mLeftInsetPaint);
  canvas.drawLine(
      visibleArea.right,visibleArea.left,mLeftInsetPaint);
  canvas.drawText(
      "(" + visibleArea.left + "," + visibleArea.top + ")",visibleArea.left + horizontalTextMargin,visibleArea.top + verticalTextMarginFromTop,mLeftInsetPaint);
  canvas.drawText(
      "(" + visibleArea.right + "," + visibleArea.bottom + ")",visibleArea.right - horizontalTextMargin,visibleArea.bottom - verticalTextMarginFromBottom,mRightInsetPaint);
} else {
  Log.d(TAG,"Visible area not available.");
}

if (mStableArea != null) {
  // Draw a cross-hairs at the stable center.
  final int lengthPx = 15;
  int centerX = mStableArea.centerX();
  int centerY = mStableArea.centerY();
  canvas.drawLine(centerX - lengthPx,centerY,centerX + lengthPx,mCenterPaint);
  canvas.drawLine(centerX,centerY - lengthPx,centerX,centerY + lengthPx,mCenterPaint);
  canvas.drawText(
      "(" + centerX + "," + centerY + ")",centerX + horizontalTextMargin,mCenterPaint);
} else {
  Log.d(TAG,"Stable area not available.");
}

if (mShowMarkers) {
  // Show a set number of markers centered around the midpoint of the stable area. If no
  // stable area,then use visible area or canvas dimensions. If an active marker is set draw
  // a line from the center to that marker.
  Rect markerArea =
      mStableArea != null
          ? mStableArea
          : (mVisibleArea != null
              ? mVisibleArea
              : new Rect(0,canvas.getHeight()));
  int centerX = markerArea.centerX();
  int centerY = markerArea.centerY();
  double radius = Math.min(centerX / 2,centerY / 2);

  double circleAngle = 2.0d * Math.PI;
  double markerpiece = circleAngle / mNumMarkers;
  for (int i = 0; i < mNumMarkers; i++) {
    int markerX = centerX + (int) (radius * Math.cos(markerpiece * i));
    int markerY = centerY + (int) (radius * Math.sin(markerpiece * i));
    canvas.drawCircle(markerX,markerY,5,mMarkerPaint);
    if (i == mActiveMarker) {
      canvas.drawLine(centerX,markerX,mMarkerPaint);
    }
  }
}

mSurface.unlockCanvasAndPost(canvas);

但就我而言，我只想使用第三方SDK。我只是想知道如何做到或是否有可能做到。将不胜感激。谢谢。

解决方法

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