I am trying to develop a application which contain a gallery with view flipper.
Gallery shows all the images.What I want to do is, the image which is shown in the view flipper should be highlighted in the gallery.
Currently I am able to highlight it on onClick.But not able to make communication between both.
I tried using following method
viewflipper.getDisplayedChild();
but it doesn't work.
following is my code
public class SliderActivity extends Activity
{
int mFlipping = 0 ;
public int currentimageindex=0;
Timer timer;
TimerTask task;
ImageView slidingimage;
android.widget.ViewFlipper flipper;
Gallery gallery;
private int[] IMAGE_IDS =
{
R.drawable.android0, R.drawable.android1, R.drawable.android2,R.drawable.android3,R.drawable.android4
};
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.mygame);
flipper = (android.widget.ViewFlipper) findViewById(R.id.flipper1);
for(int i=0;i<IMAGE_IDS.length;i++)
{
// This will create dynamic image view and add them to ViewFlipper
ImageView image = new ImageView(getApplicationContext());
image.setBackgroundResource(IMAGE_IDS[i]);
flipper.addView(image);
}
gallery=(Gallery)findViewById(R.id.gallery1);
gallery.setAdapter(new ImageAdapter(this));
if(mFlipping==0){
/** Start Flipping */
flipper.startFlipping();
mFlipping=1;
//mButton.setText(R.string.str_btn_stop);
}
else{
/** Stop Flipping */
flipper.stopFlipping();
mFlipping=0;
// mButton.setText(R.string.str_btn_start);
}
}
public class ImageAdapter extends BaseAdapter
{
int mGalleryItemBackground;
private Context mContext;
public ImageAdapter(Context c)
{
mContext = c;
TypedArray a = obtainStyledAttributes(R.styleable.Theme);
mGalleryItemBackground = a.getResourceId(
R.styleable.Theme_android_galleryItemBackground,0);
a.recycle();
}
public int getCount()
{
return IMAGE_IDS.length;
}
public Object getItem(int position)
{
return position;
}
public long getItemId(int position)
{
return position;
}
public View getView(int position,View convertView, ViewGroup parent)
{
ImageView i = new ImageView(mContext);
i.setImageResource(IMAGE_IDS[position]);
i.setLayoutParams(new Gallery.LayoutParams(150, 100));
i.setScaleType(ImageView.ScaleType.FIT_XY);
i.setBackgroundResource(mGalleryItemBackground);
return i;
}
}
public void onClick(View v) {
finish();
android.os.Process.killProcess(android.os.Process.myPid());
}
}
If I understand your question... I think you need to use setOnItemSelectedListener...
gallery.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> adapter, View gallery,
int position, long arg3) {
myPosition = position;
//tell your flipper something useful here using the current position of the gallery
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
And talk to your flipper from in the onItemSelected callback.
Related
I'am new to android and I've a project of making a grid view of images and onclick on image it shows it , thats the ImageAdapter class code
public class ImageAdapter extends BaseAdapter{
private static LayoutInflater inflater = null;
private Activity activity;
private String mode = "";
int[] images=null ;
public ImageAdapter(Activity act, String mode , int[] images){
inflater = (LayoutInflater) act.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
activity = act;
this.mode = mode;
this.images= images ;
}
public ImageView getImage(int pos)
{
ImageView im = (ImageView) getItem(pos);
return im ;
}
#Override
public int getCount() {
return images.length;
}
#Override
public Object getItem(int position) {
return new Integer(images[position]);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View view, ViewGroup parent) {
if(mode.equalsIgnoreCase("grid")){
if (view == null) {
view = inflater.inflate(R.layout.each_image1, null);
}
ImageView iv = (ImageView)view.findViewById(R.id.imageView);
iv.setImageResource(images[position]);
} else if(mode.equalsIgnoreCase("gallery")){
if (view == null) {
view = inflater.inflate(R.layout.each_image_gallery, null);
}
ImageView iv = (ImageView)view.findViewById(R.id.imageView);
iv.setImageResource(images[position]);
}
return view;
}
}
thats my grid activity
public class GridActivity extends Activity {
GridView grid = null;
public static ImageAdapter adapter1 ;
public static ImageAdapter adapter2 ;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.grid);
adapter1= new ImageAdapter(GridActivity.this, "grid" , Images.images1);
adapter2 = new ImageAdapter(GridActivity.this, "grid" , Images.images2);
Intent i = this.getIntent();
if (i!=null)
{
String unique = i.getExtras().getString("Unique");
if (unique.equals("islam"))
{
Toast.makeText(GridActivity.this, "islam", Toast.LENGTH_LONG).show();
grid = (GridView)findViewById(R.id.gridView1);
grid.setAdapter(adapter1);
}
if (unique.equals("natural"))
{
Toast.makeText(GridActivity.this, "nat", Toast.LENGTH_LONG).show();
grid = (GridView)findViewById(R.id.gridView1);
grid.setAdapter(adapter2);
}
}
grid.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int pos,long id) {
Intent i = new Intent(GridActivity.this, imgPrevActivity.class);
i.putExtra("selectedIntex", pos);
startActivity(i);
Toast.makeText(GridActivity.this,"ddd",Toast.LENGTH_LONG).show();
}
});
}
}
and this is the activity where it supposes to show any clicked on image
public class imgPrevActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.each_image1);
ImageView im = (ImageView)findViewById(R.id.imageView);
int pos = getIntent().getExtras().getInt("selectedIntex");
// ImageAdapter adapter = new ImageAdapter(imgPrevActivity.this, "image prev", null);
long Id= GridActivity.adapter1.getItemId(pos);
im.setImageResource((int) Id);
}
}
i've tried to get the position of image clicked on from the grid
then getting the Id from the position
and setting the image view to that ID
but it doesnt work !!
thats where the images are put in arrays
public class Images {
public static int[] images1 = {
R.drawable.buds, R.drawable.cherry_34,
R.drawable.clouds_2, R.drawable.coffee_beans_2,
R.drawable.death_valley_sand_dunes
};
public static int[] images2= {
R.drawable.morning_glory_pool,
R.drawable.pink_flowers, R.drawable.sun_flower,
R.drawable.sunrise_3, R.drawable.yellow_rose_3,
};
}
You have to pass your image resource id with intent. The list item id of adapter is useless because you have new Activity on the screen.
grid.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int pos,long id) {
Intent i = new Intent(GridActivity.this, imgPrevActivity.class);
i.putExtra("selectedIntex", grid.getAdapter().getItem(pos);
startActivity(i);
Toast.makeText(GridActivity.this,"ddd",Toast.LENGTH_LONG).show();
}
});
and change your code in your ImgPreviewActivity:
public class imgPrevActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.each_image1);
ImageView im = (ImageView)findViewById(R.id.imageView);
int pos = getIntent().getIntExtra("selectedIntex", 0);
im.setImageResource(pos);
}
}
I think it should work
I am new to android. I have a requirement now. I need to add around 10 images in the res/drawable folder and on running the app i should display this images on a listView.and on selecting any of the image i should display this image in the new activity should be able to zoom in and zoom out. Please help me out to figure out this with the sample code.
Thanks in advance.
this example for create Gallery, select one and set to selectedImageView.
so after that you can do everything with selectedImageView.
public class MyActivity extends Activity{
private int selectedImagePosition = 0;
private ImageView selectedImageView;
private List<Drawable> drawables;
private Gallery gallery;
#Override
public void onCreate(Bundle savedInstanceState) {
selectedImageView = (ImageView) view.findViewById(R.id.selected_imageview);
getDrawablesList();
gallery = (Gallery) view.findViewById(R.id.Gallery);
gallery.setAdapter(new ImageAdapter(getActivity().getApplicationContext()));
gallery.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, final int position, long id) {
setSelectedImage(selectedImagePosition);
}
});
private void getDrawablesList() {
drawables = new ArrayList<Drawable>();
drawables.add(getResources().getDrawable(R.drawable.res1));
drawables.add(getResources().getDrawable(R.drawable.res2));
drawables.add(getResources().getDrawable(R.drawable.res3));
drawables.add(getResources().getDrawable(R.drawable.res4));
}
private void setSelectedImage(int selectedImagePosition) {
BitmapDrawable bd = (BitmapDrawable) drawables.get(selectedImagePosition);
Bitmap b = Bitmap.createScaledBitmap(bd.getBitmap(), (int) (bd.getIntrinsicHeight() * 0.9), (int) (bd.getIntrinsicWidth() * 0.7), false);
selectedImageView.setImageBitmap(b);
selectedImageView.setScaleType(ScaleType.FIT_XY);
}
You can use a GalleryView
Refer to the link below for more help:
http://mobiforge.com/designing/story/understanding-user-interface-android-part-3-more-views
private ImageView selectedImageView;
private TextView _nameTextView;
private Gallery gallery;
Integer[] imageIDs = { R.drawable.hbath, R.drawable.hfood,
R.drawable.hmedicine, R.drawable.htherapy, R.drawable.htoilet,
R.drawable.hother };
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
selectedImageView = (ImageView) findViewById(R.id.imageSwitcher1);
_nameTextView = (TextView) findViewById(R.id.NameTextView);
gallery = (Gallery) findViewById(R.id.gallery1);
gallery.setAdapter(new ImageAdapter(this));
gallery.setOnItemClickListener(new OnItemClickListener() {
gallery.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> arg0, View arg1,
int position, long arg3) {
// TODO Auto-generated method stub
if (position == 0) {
selectedImageView
.setImageResource(R.drawable.hbathbackground);
_nameTextView.setText("Toilet");
} else if (position == 1) {
selectedImageView
.setImageResource(R.drawable.hfoodbackground);
_nameTextView.setText("Food");
} else if (position == 2) {
selectedImageView
.setImageResource(R.drawable.hmedicinebackground);
_nameTextView.setText("Medicine");
} else if (position == 3) {
selectedImageView
.setImageResource(R.drawable.htherapybackground);
_nameTextView.setText("Therapy");
} else if (position == 4) {
selectedImageView
.setImageResource(R.drawable.htoiletbackground);
_nameTextView.setText("Bath");
} else if (position == 5) {
selectedImageView
.setImageResource(R.drawable.hotherbackground);
_nameTextView.setText("Other");
}
}
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
}
and ImageAdapter
public class ImageAdapter extends BaseAdapter {
private Context context;
private int itemBackground;
public ImageAdapter(Context c) {
context = c;
// ---setting the style---
TypedArray a = obtainStyledAttributes(R.styleable.Gallery1);
itemBackground = a.getResourceId(
R.styleable.Gallery1_android_galleryItemBackground, 0);
a.recycle();
}
// ---returns the number of images---
public int getCount() {
return imageIDs.length;
}
// ---returns the ID of an item---
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
// ---returns an ImageView view---
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView = new ImageView(context);
imageView.setImageResource(imageIDs[position]);
imageView.setBackgroundColor(0xFF000000);
// imgView.setImageBitmap(bitmap);
imageView.setScaleType(ImageView.ScaleType.FIT_XY);
imageView.setLayoutParams(new Gallery.LayoutParams(155, 235));
imageView.setBackgroundResource(R.drawable.customborder2);
return imageView;
}
}
public class RenkKorluguTesti extends Activity {
/** Called when the activity is first created. */
ImageView imageView1;
EditText editText1=null;
Button button1;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.galeri);
imageView1 = (ImageView) findViewById(R.id.imageView1);
editText1 = (EditText) findViewById(R.id.editText1);
button1 = (Button) findViewById(R.id.button1);
Gallery gallery = (Gallery) findViewById(R.id.gallery);
gallery.setAdapter(new ImageAdapter(this));
gallery.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView parent, View v, int position, long id) {
switch(position) {
case 0:{
imageView1.setImageResource(R.drawable.plate01);
break;
}
case 1: imageView1.setImageResource(R.drawable.plate02); break;
case 2: imageView1.setImageResource(R.drawable.plate03); break;
}
//Toast.makeText(RenkKorluguTesti.this, "" + position, Toast.LENGTH_SHORT).show();
}
});
}
public void tikla(View v) {
if(editText1.getText().toString()=="12")
editText1.setText("yov");
//Toast.makeText(RenkKorluguTesti.this, "Birinci testi geçtiniz.",Toast.LENGTH_SHORT).show();
}
public class ImageAdapter extends BaseAdapter {
int mGalleryItemBackground;
private Context mContext;
private Integer[] mImageIds = {
R.drawable.plate01,
R.drawable.plate02,
R.drawable.plate03,
};
public ImageAdapter(Context c) {
mContext = c;
TypedArray attr = mContext.obtainStyledAttributes(R.styleable.RenkKorluguTesti);
mGalleryItemBackground = attr.getResourceId(
R.styleable.RenkKorluguTesti_android_galleryItemBackground, 0);
attr.recycle();
}
public int getCount() {
return mImageIds.length;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView = new ImageView(mContext);
imageView.setImageResource(mImageIds[position]);
imageView.setLayoutParams(new Gallery.LayoutParams(150, 100));
imageView.setScaleType(ImageView.ScaleType.FIT_XY);
imageView.setBackgroundResource(mGalleryItemBackground);
return imageView;
}
}
}
I want to make a Toast if the text written is equal 12 in EditText box.
I used editText1.getText().toString() method but it seems not working.
What's wrong? Could you please check public void tikla() method? Thx.
On Java you cannot do this kind of comparation:
if(editText1.getText().toString()=="12")
You need to do:
if(editText1.getText().toString().equalsIgnoreCase("12"))
or
if(editText1.getText().toString().compareTo("12")==0)
This comparison in your code is not correct.
(editText1.getText().toString()=="12")
Comparing Strings is done via equals() not == operator.
You can do something like this:
if (editText1.getText().toString().compareTo("12") == 0)
using the java.lang.String.compareTo(java.lang.String) method.
I am trying make a gallery which contains all images in the assets folder, but I keep getting a NullPointerException error,can anyone tell me what's wrong?
public class MyGallery extends Activity {
private GridView gv;
private SlidingDrawer sd;
private ImageView im;
private int[] icons={R.drawable.download,R.drawable.setwallpaper,
R.drawable.list,R.drawable.other};
private String[] items={"下载到本地","设置为桌面","列表查看","支持本APP"};
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
gv = (GridView)findViewById(R.id.grid);
sd = (SlidingDrawer)findViewById(R.id.drawer);
im=(ImageView)findViewById(R.id.openicon);
/* 使用告定义的MyGridViewAdapter设置GridView里面的item内容 */
MyGridViewAdapter adapter=new MyGridViewAdapter(this,items,icons);
gv.setAdapter(adapter);
/* 设定SlidingDrawer被打开的事件处理 */
sd.setOnDrawerOpenListener(new SlidingDrawer.OnDrawerOpenListener()
{
#Override
public void onDrawerOpened()
{
im.setImageResource(R.drawable.closedrawer);
}
});
/* 设置SlidingDrawer被关闭的事件处理 */
sd.setOnDrawerCloseListener(new SlidingDrawer.OnDrawerCloseListener()
{
#Override
public void onDrawerClosed()
{
im.setImageResource(R.drawable.showdrawer);
}
});
Log.d("tag", "抽屉初始化成功");
Gallery g = (Gallery) findViewById(R.id.mygallery);
/*新增几ImageAdapter并设定给Gallery对象*/
g.setAdapter(new ImageAdapter(this,getImage()));
/*设定一个itemclickListener事件*/
g.setOnItemClickListener(new OnItemClickListener()
{
public void onItemClick(AdapterView<?> parent,
View v, int position, long id)
{
}
});
Log.d("tag", "图片初始化成功");
}
private List<String> getImage()
{
/* 设定目前所在路径 */
List<String> it=new ArrayList<String>();
File f=new File("file:///android_asset/");
File[] files=f.listFiles();
Log.d("tag", "读取asset资源");
/* 将所有文件存入ArrayList中 */
for(int i=0;i<files.length;i++)
{
File file=files[i];
if(getImageFile(file.getPath()))
it.add(file.getPath());
}
return it;
}
private boolean getImageFile(String fName)
{
boolean re;
/* 取得扩展名 */
String end=fName.substring(fName.lastIndexOf(".")+1,
fName.length()).toLowerCase();
/* 按扩展名的类型决定MimeType */
if(end.equals("jpg")||end.equals("gif")||end.equals("png")
||end.equals("jpeg")||end.equals("bmp"))
{
re=true;
}
else
{
re=false;
}
return re;
}
/*改写BaseAdapter自定义一ImageAdapter class*/
public class ImageAdapter extends BaseAdapter
{
/*声明变量*/
int mGalleryItemBackground;
private Context mContext;
private List<String> lis;
/*ImageAdapter的构造符*/
public ImageAdapter(Context c,List<String> li)
{
mContext = c;
lis=li;
/* 使用res/values/attrs.xml中的<declare-styleable>定义
* 的Gallery属性.*/
TypedArray a = obtainStyledAttributes(R.styleable.Gallery);
/*取得Gallery属性的Index id*/
mGalleryItemBackground = a.getResourceId(
R.styleable.Gallery_android_galleryItemBackground, 0);
/*让对象的styleable属性能够反复使用*/
a.recycle();
}
/*几定要重写的方法getCount,传回图片数目*/
public int getCount()
{
return lis.size();
}
/*一定要重写的方法getItem,传回position*/
public Object getItem(int position)
{
return position;
}
/*一定要重写的方法getItemId,传并position*/
public long getItemId(int position)
{
return position;
}
/*几定要重写的方法getView,传并几View对象*/
public View getView(int position, View convertView,
ViewGroup parent)
{
/*产生ImageView对象*/
ImageView i = new ImageView(mContext);
/*设定图片给imageView对象*/
Bitmap bm = BitmapFactory.decodeFile(lis.
get(position).toString());
i.setImageBitmap(bm);
/*重新设定图片的宽高*/
i.setScaleType(ImageView.ScaleType.FIT_XY);
/*重新设定Layout的宽高*/
i.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
/*设定Gallery背景图*/
i.setBackgroundResource(mGalleryItemBackground);
/*传回imageView对象*/
return i;
}
}
}
I am really grateful.
Are you trying to load images from assets folder in your project ??? Well, in that case try reading asset files through AssetManager. I think this might help
I have a gallery where I have implement a custom adapter extending the BaseAdapter. For some items, I want them to be disabled, and not clickable as well.
Overriding the isEnabled(int) method doesn't work. I am still able to click on the disabled items, and then, the gallery centers this item inside it.
Any ideas?
This following is the relevant source code of gallery widget
public boolean onSingleTapUp(MotionEvent e) {
if (mDownTouchPosition >= 0) {
// An item tap should make it selected, so scroll to this child.
scrollToChild(mDownTouchPosition - mFirstPosition);
// Also pass the click so the client knows, if it wants to.
if (mShouldCallbackOnUnselectedItemClick || mDownTouchPosition == mSelectedPosition) {
performItemClick(mDownTouchView, mDownTouchPosition, mAdapter
.getItemId(mDownTouchPosition));
}
return true;
}
return false;
}
As you can see, the gallery scrolls to the tapped child item before performing the click on it.
So the only way you can truly disable an item is by extending Gallery and overriding onSingleTapUp(MotionEvent e) in it.
#Override
public boolean onSingleTapUp(MotionEvent e) {
int itemPosition = pointToPosition((int) e.getX(), (int) e.getY());
if (item at itemPosition is disabled) {
// Do nothing.
return true;
}
return super.onSingleTapUp(e);
}
Try and let me know.
Try the below code where you can handle the click event for specific positions. Also you can disable the specific items.
public class SplashActivity extends Activity{
private Activity _activity;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Gallery g = new Gallery(this);
g.setAdapter(new ImageAdapter(this));
setContentView(g);
}
public class ImageAdapter extends BaseAdapter {
int mGalleryItemBackground;
private Context mContext;
private Integer[] mImageIds = {
R.drawable.menu1,
R.drawable.menu2,
R.drawable.menu3,
R.drawable.menu4,
R.drawable.menu1,
R.drawable.menu2,
R.drawable.menu3,
R.drawable.menu4
};
public ImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
return mImageIds.length;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(final int position, View convertView, ViewGroup parent) {
ImageView i = new ImageView(mContext);
i.setImageResource(mImageIds[position]);
i.setLayoutParams(new Gallery.LayoutParams(150, 100));
i.setScaleType(ImageView.ScaleType.FIT_XY);
i.setBackgroundResource(mGalleryItemBackground);
if(position!=0){
i.setEnabled(false);
i.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(SplashActivity.this, "" + position, Toast.LENGTH_SHORT).show();
}
});
}
return i;
}
}
}