I created a class MiOverlay that extends from Overlay.
And it doesn't recognize the getResources method.. What do I have to do. Here the full code of my class
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Point;
import android.location.Location;
import com.google.android.maps.MapView;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.Overlay;
public class MiOverlay extends Overlay {
GeoPoint point;
public MiOverlay(GeoPoint point)
{
super();
this.point = point;
}
#Override
public boolean draw(Canvas canvas, MapView mapView, boolean shadow, long when){
super.draw(canvas, mapView, shadow);
Point scrnPoint = new Point();
mapView.getProjection().toPixels(this.point, scrnPoint);
Bitmap marker = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
canvas.drawBitmap(marker, scrnPoint.x - marker.getWidth() / 2, scrnPoint.y - marker.getHeight() /2 , null);
return true;
}
I disagree with Luis Lavieri's answer. Your easiest solution would be to use the MapView's context:
Bitmap marker = BitmapFactory.decodeResource(mapView.getContext().getResources(), R.drawable.ic_launcher);
Easy and no potential memory leaks.
You are in an Non-Activity Class, so you must refer to what is discussed in this question. However, it is not recommended to pass the Context due to a possible memory leaking. Try to implement your resources within your Activity using getResources() or if you are using Fragments, use getActivity().getResources()...
Anyway, your easiest option would be:
private Context context;
public MiOverlay(GeoPoint point, Context _context)
{
super();
this.point = point;
context = _context;
}
#Override
public boolean draw(Canvas canvas, MapView mapView, boolean shadow, long when){
super.draw(canvas, mapView, shadow);
Point scrnPoint = new Point();
mapView.getProjection().toPixels(this.point, scrnPoint);
Bitmap marker = BitmapFactory.decodeResource(context.getResources(), R.drawable.ic_launcher);
canvas.drawBitmap(marker, scrnPoint.x - marker.getWidth() / 2, scrnPoint.y - marker.getHeight() /2 , null);
return true;
}
Related
I am new to android and I want to add this viewpager library https://github.com/jfeinstein10/JazzyViewPager to my project. For that I first extracted the project. And than I right clicked on my project than Build Path -> configure build path-> than I selected libraries. After that I selected Add external jar and added the library. However, The project mentions that I should make changes in my Imagedadapter. Which I did.. However, I am getting yellow bulb with red cross and I it says JazzyViewPager cannot be resolved to a variable..I believe I am doing minor mistake..but can't figure out..Please help ..Thanks in advance
Following is my Imageadapter.java
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.LayerDrawable;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
public class ImageAdapter extends PagerAdapter {
Context context;
private int[] GalImages = new int[] {
R.drawable.one,
R.drawable.two,
R.drawable.three,
R.drawable.four,
R.drawable.five
};
ImageAdapter(Context context){
this.context=context;
}
#Override
public int getCount() {
return GalImages.length;
}
#Override
public boolean isViewFromObject(View view, Object object) {
return view == ((ImageView) object);
}
#Override
public Object instantiateItem(ViewGroup container, int position) {
ImageView imageView = new ImageView(context);
int padding = context.getResources().getDimensionPixelSize(R.dimen.padding_small);
imageView.setPadding(padding, padding, padding, padding);
imageView.setScaleType(ImageView.ScaleType. FIT_XY );
Resources r = context.getResources();
Bitmap bmp = BitmapFactory.decodeResource(r, GalImages[position]);
int width=200;//set your width
int height=200;//set your height
Bitmap resizedbitmap = Bitmap.createScaledBitmap(bmp, width, height, true);
Drawable d = new BitmapDrawable(r,resizedbitmap);
Drawable[] layers = new Drawable[2];
layers[0] = d;
layers[1] = r.getDrawable(R.drawable.a);
LayerDrawable layerDrawable = new LayerDrawable(layers);
imageView.setImageDrawable(layerDrawable);
((ViewPager) container).addView(imageView, 0);
return imageView;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
((ViewPager) container).removeView((ImageView) object);
}
private JazzyViewPager mJazzy;
/* ... */
#Override
public Object instantiateItem(ViewGroup container, final int position) {
Object obj = super.instantiateItem(container, position);
mJazzy.setObjectForPosition(obj, position);
return obj;
}
}
}
Edited
Download the library project
Import it into your workspace
Right click on your project, click on Properties
In the "Library" section at the bottom, click on Add
Select the Jazzy ListView library , click OK
Try these:
click the import button in the file menu in eclispe.
select import existing projects into workspace.
out in the finder window select the JazzyViewPager library.
once the library is visible in your work space right click your project and select properties.
go to the android option.
6.at the bottom where the library window click add.
select your project.
this should work this is how you import libraries such as the facebook sdk and google play sdk if not let me know. hopes this helps.
I'm trying to fix my camera app. When i hold the camera in landscape mode, it previews on the screen sideways.
I found this fix on stack : Android - Camera preview is sideways
In my CameraSurfaceView class constructor, I get the surface like this this.Surface = getHolder();.
In the surfaceChanged method i check the display rotation against Surface.ROTATION_<#> for 0,90,180,and 270 degrees (method below). However, each one of the ROTATIONSurface constants is underlined with the following error ROTATION_<#> cannot be resolved or is not a field. I am not sure what I am doing wrong. My CameraSurfaceView is separate from my activity so I'm wondering if the display has something to do with it?
Hope this is explained correctly, if you need more code or anything let me know. I appreciate this in advance!
import java.io.IOException;
import java.util.List;
import android.content.Context;
import android.hardware.Camera;
import android.hardware.Camera.AutoFocusCallback;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.WindowManager;
import android.widget.ZoomControls;
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
int orientation = 0;
Camera.Parameters params = Cam.getParameters();
WindowManager window = (WindowManager) getSystemService(Context.WINDOW_SERVICE);
android.view.Display display = window.getDefaultDisplay();
if(display.getRotation() == Surface.ROTATION_0)
{
params.setPreviewSize(height, width);
Cam.setDisplayOrientation(90);
}
if(display.getRotation() == Surface.ROTATION_90)
{
params.setPreviewSize(height, width);
}
if(display.getRotation() == Surface.ROTATION_180)
{
params.setPreviewSize(height, width);
}
if(display.getRotation() == Surface.ROTATION_270)
{
params.setPreviewSize(height, width);
Cam.setDisplayOrientation(180);
}
List<Camera.Size> previewSizes = params.getSupportedPreviewSizes();
Camera.Size previewSize = getBestPreviewSize(width, height);
params.setPreviewSize(previewSize.width, previewSize.height);
int zoom = 0;
params.setZoom(zoom);
zoomControls.setOnZoomInClickListener(new View.OnClickListener(){
public void onClick(View v){
Camera.Parameters params = Cam.getParameters();
maxZoomLevel = params.getMaxZoom();
if(currentZoomLevel < maxZoomLevel){
currentZoomLevel++;
Cam.startSmoothZoom(currentZoomLevel);
}
}
});
zoomControls.setOnZoomOutClickListener(new View.OnClickListener(){
public void onClick(View v){
Camera.Parameters params = Cam.getParameters();
maxZoomLevel = params.getMaxZoom();
if(currentZoomLevel > 0){
currentZoomLevel--;
Cam.startSmoothZoom(currentZoomLevel);
}
}
});
Cam.setParameters(params);
try {
Cam.setPreviewDisplay(Surface);
} catch (IOException e) {
e.printStackTrace();
}
Cam.startPreview();
}
Since you have a field named Surface, you cannot access the class Surface from within your class.
Instead, you will have to write
android.view.Surface.ROTATION_0
or rename your field.
You've named your field Surface, which is also the name of the type you are trying to reference a constant from. Rename the field so that it does not have the same name as the type, then import android.view.Surface and you should be able to reference Surface.ROTATION_0 etc with no problems.
Note that Java style usually dictates you start variable names with lower case, and types with upper case, which avoids this type of conflict.
I already made a simple android application, which I also have integrated Google Maps in it..
It is also capable of connecting to MySQL (localhost) to display my desired places using longitude and latitude values..
My question is, is it possible to make another overlay item above Google Maps when a marker is clicked (just like what happens in foursquare)?
To be specific, i want to display a text that contains the name of a place.
Heres my class of displaying the overlay items.
I made an onTap method, but it display a dialog box, I want to display a simple text box that shows the name of the place.
package finddroid.map;
import java.util.ArrayList;
import android.app.AlertDialog;
import android.content.Context;
import android.graphics.Paint;
import android.graphics.Point;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.text.TextPaint;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.ItemizedOverlay;
import com.google.android.maps.MapView;
import com.google.android.maps.OverlayItem;
public class CustomItemizedOverlay extends ItemizedOverlay<OverlayItem>
{
private int markerHeight;
private ArrayList<OverlayItem> mapOverlays = new ArrayList<OverlayItem>();
private Context context;
public CustomItemizedOverlay(Drawable defaultMarker)
{
super(boundCenterBottom(defaultMarker));
markerHeight = ((BitmapDrawable) defaultMarker).getBitmap().getHeight();
populate();
}
public CustomItemizedOverlay(Drawable defaultMarker, Context context)
{
this(defaultMarker);
this.context = context;
}
#Override
protected OverlayItem createItem(int i)
{
return mapOverlays.get(i);
}
#Override
public int size()
{
return mapOverlays.size();
}
#Override
//Event when a place is tapped
protected boolean onTap(int index)
{
OverlayItem item = mapOverlays.get(index);
AlertDialog.Builder dialog = new AlertDialog.Builder(context);
dialog.setTitle(item.getTitle());
dialog.setMessage(item.getSnippet());
dialog.show();
return true;
}
public void addOverlay(OverlayItem overlay)
{
mapOverlays.add(overlay);
this.populate();
}
}
Have a look at this project - balloon itemized overlay. It is using own class extending FrameLayout to show balloons.
So if you want to modify your code put this into your onTap method to display a TextView above taped item
TextView text = new TextView(context);
text.setText(item.getTitle());
MapView.LayoutParams params = new MapView.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
ViewGroup.LayoutParams.WRAP_CONTENT, item.getPoint(), MapView.LayoutParams.BOTTOM_CENTER);
params.mode = MapView.LayoutParams.MODE_MAP;
mMapView.addView(text, params);
I think this code is simple and easy to understand and you can improve it accordingly to your needs. To make it work you have to pass instance of MapView to constructor of your overlay and save it to private variable mMapView.
private MapVeiw mMapView;
public CustomItemizedOverlay(Drawable defaultMarker, Context context, MapView mapView) {
this(defaultMarker);
this.context = context;
this.mMapView = mapView;
}
And don't forget to add MapView as one of parameters when you call new CustomItemizedOverlay().
I have spend about 3 hours trying to figure this out and it seems so simple but i cant seem to work it out! Could someone please help me! All i want it to do it display an image from the drawable resources folder. It says that "cannot convert from Bitmap to Drawable".
package com.CS3040.Places;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Point;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import com.CS3040.*;
import com.CS3040.Coursework.R;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapView;
import com.google.android.maps.OverlayItem;
public class PlaceOverlayItem extends OverlayItem {
private final GeoPoint point;
private final Place place;
private final Drawable marker;
//private final Context context;
public PlaceOverlayItem(Context context, Place p, String type) {
super(p.getGeoPoint(), p.getName(), p.getFormatted_address());
if(type.equals("restaurant"))
{
//this.marker =
Bitmap bmp = BitmapFactory.decodeResource(context.getResources(), R.drawable.restaurant);
this.marker = bmp;
}
//super.setMarker(this.marker);
this.point = p.getGeoPoint();
this.place = p;
}
/**
* #return the point
*/
public GeoPoint getPoint() {
return point;
}
/**
* #return the place
*/
public Place getPlace() {
return place;
}
}
Well it's right - Bitmap doesn't extend Drawable. I haven't done any Android development, but it sounds like you want a BitmapDrawable:
Resources resources = context.getResources();
Bitmap bmp = BitmapFactory.decodeResource(resources, R.drawable.restaurant);
this.marker = new BitmapDrawable(resources, bmp);
change this:
Bitmap bmp = BitmapFactory.decodeResource(context.getResources(), R.drawable.restaurant);
this.marker = bmp;
to this:
Drawable d = context.getResources().getDrawable(R.drawable.restaurant);
d.setBounds(0, 0, d.getIntrinsicWidth(), d.getIntrinsicHeight());
this.marker = d;
You need to get your resource as a Drawable:
if(type.equals("restaurant"))
{
this.marker = context.getResources().getDrawable(R.drawable.restaurant);
} else {
// marker would get no value without that else case - not allowed if you declare it final
this.marker = null;
}
Got some errors following the tutorial for MapView when i was going to integrate overlays.
TravelBuddy.java
package com.jappapps.android.travelbuddy;
import java.util.List;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;
import com.google.android.maps.Overlay;
public class TravelBuddy extends MapActivity {
List<Overlay> mapOverlays;
Drawable drawable;
Overlays itemizedOverlay;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main); // changed to lowercase
MapView mapView = (MapView) findViewById(R.id.mapview); // match id in main.xml
mapView.setBuiltInZoomControls(true);
mapOverlays = mapView.getOverlays();
drawable = this.getResources().getDrawable(R.drawable.androidmarker);
itemizedOverlay = new Overlays(drawable);
}
#Override
protected boolean isRouteDisplayed() {
return false;
}
}
Overlays.java
package com.jappapps.android.travelbuddy;
import java.util.ArrayList;
import android.graphics.drawable.Drawable;
import com.google.android.maps.ItemizedOverlay;
import com.google.android.maps.OverlayItem;
public class Overlays extends ItemizedOverlay {
public Overlays(Drawable arg0) {
super(arg0);
Object overlayitem;
ItemizedOverlay.addOverlay(overlayitem);
Object itemizedoverlay;
ArrayList<OverlayItem> mapOverlays;
mapoverlays.add(itemizedOverlay);
}
private ArrayList<OverlayItem> mOverlays = new ArrayList<OverlayItem>();
super(boundCenterBottom(defaultMarker));
public void addOverlay(OverlayItem overlay) {
mOverlays.add(overlay);
populate();}
#Override
protected OverlayItem createItem(int i) {
return mOverlays.get(i);
}
#Override
public int size() {
return 0;
}
}
Sorry if i look like a complete newbie, but i am trying to learn and i got an awesome app idea which needs mapview, webview, overlays and tabs.
#Override
public int size() {
return mOverlays.size();
}
I was using androidmarker.png from the "official" google mapview tutorial and was stuck with the overlays not showing up. I tried several other people's working examples and still same problem. I switched out androidmarker.png with a smaller png and it worked. So the code was fine, but something to do with the marker asset.