如何在Android中实现按地址搜索谷歌地图? [英] How to implement google maps search by address in Android?

问题描述

如何在Android中实现谷歌地图按地址搜索?

How to implement google maps search by address in Android?

推荐答案

为此，您需要在地图活动中创建一个地图叠加类.

For that you need to create one map overlay class in map activity.

class MapOverlay extends com.google.android.maps.Overlay
{
    public boolean draw(Canvas canvas, MapView mapView, 
    boolean shadow, long when) 
    {
        super.draw(canvas, mapView, shadow);                   

        //---translate the GeoPoint to screen pixels---
        Point screenPts = new Point();
        mapView.getProjection().toPixels(p, screenPts);

        //---add the marker---
        Bitmap bmp = BitmapFactory.decodeResource(
            getResources(), R.drawable.pink);            
        canvas.drawBitmap(bmp, screenPts.x, screenPts.y-32, null);         
        return true;
    }
} 

请在哪里更改 R.drawable.pink .把你的任何drawable.

Where please change R.drawable.pink . Put your any drawable.

现在请在您的搜索onClick 事件中编写以下代码..

Now please write below code in your search onClick event..

List<Address> addresses = geoCoder.getFromLocationName(txtsearch.getText().toString(),5);

if(addresses.size() > 0) {
    p = new GeoPoint( (int) (addresses.get(0).getLatitude() * 1E6), 
        (int) (addresses.get(0).getLongitude() * 1E6));

    controller.animateTo(p);
    controller.setZoom(12);

    MapOverlay mapOverlay = new MapOverlay();
    List<Overlay> listOfOverlays = map.getOverlays();
    listOfOverlays.clear();
    listOfOverlays.add(mapOverlay);

    map.invalidate();
    txtsearch.setText("");
}
else {
    AlertDialog.Builder adb = new AlertDialog.Builder(GoogleMap.this);
    adb.setTitle("Google Map");
    adb.setMessage("Please Provide the Proper Place");
    adb.setPositiveButton("Close",null);
    adb.show();
}

其中 txtsearch 是 EditText 而 controller 是地图控制器 ..

Where txtsearch is a EditText and controller is a map controller ..

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