I am using a gridview which displays images from app folder on sdcard. How can I display full screen image when clicked on the image in the gridview. The code below works fine when loading images in the gridview. Thanks
Update: so I created another activity FullImageActivity and I am trying to display the clicked image grom gridview in there. The problem is it only shows the image path and not the image. I need to show the image in the FullImageActivity. How do I achieve this?
public class ImageAdapter extends BaseAdapter{
private Context mContext;
ArrayList<String> itemList = new ArrayList<String>();
public ImageAdapter(Context c){
mContext = c;
}
void add (String path){
itemList.add(path);
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return itemList.size();
}
#Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return itemList.get(position);
}
#Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
ImageView imageView;
if (convertView == null) { // if it's not recycled, initialize some attributes
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(220, 220));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(8, 8, 8, 8);
} else {
imageView = (ImageView) convertView;
}
Bitmap bm = decodeSampledBitmapFromUri(itemList.get(position), 220, 220);
imageView.setImageBitmap(bm);
return imageView;
}
public Bitmap decodeSampledBitmapFromUri(String path, int reqWidth, int reqHeight) {
Bitmap bm = null;
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(path, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
bm = BitmapFactory.decodeFile(path, options);
return bm;
}
public int calculateInSampleSize(
BitmapFactory.Options options, int reqWidth, int reqHeight) {
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
if (width > height) {
inSampleSize = Math.round((float)height / (float)reqHeight);
} else {
inSampleSize = Math.round((float)width / (float)reqWidth);
}
}
return inSampleSize;
}
}
ImageAdapter myImageAdapter;
GridView gridview;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.library_layout);
gridview = (GridView) findViewById(R.id.gridview);
myImageAdapter = new ImageAdapter(this);
gridview.setAdapter(myImageAdapter);
String ExternalStorageDirectoryPath = Environment.getExternalStorageDirectory().getAbsolutePath();
String targetPath = ExternalStorageDirectoryPath + "/AppFolder/";
File targetDirector = new File(targetPath);
File[] files = targetDirector.listFiles();
for (File file : files){
myImageAdapter.add(file.getAbsolutePath());
}
gridview.setOnItemClickListener(myOnItemClickListener);
}
OnItemClickListener myOnItemClickListener = new OnItemClickListener(){
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
String prompt = (String)parent.getItemAtPosition(position);
Toast.makeText(getApplicationContext(), prompt, Toast.LENGTH_LONG).show();
Intent intent = new Intent(LibraryActivity.this, FullImageActivity.class);
intent.putExtra("Image", position);
LibraryActivity.this.startActivity(intent);
}
};
}
//FullImageActivity
public class FullImageActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.full_image);
int position = getIntent().getExtras().getInt("Image");
ImageView imageView = (ImageView) findViewById(R.id.full_image_view);
imageView.setImageResource(position);
// above code displays the image path but not the image.How can I display the image?Thanks
}
}
Use TouchImageView within an activity and pass your image to that activity
Example Activity
public class FullScreenImageActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_full_screen_image);
Intent intent = getIntent();
Bitmap bitmap = (Bitmap) intent.getParcelableExtra("BitmapImage");
TouchImageView imageView = (TouchImageView)findViewById(R.id.imgFullScreen);
imageView.setLayoutParams( new RelativeLayout.LayoutParams(WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.MATCH_PARENT));
imageView.setImageBitmap(bitmap);
}
Layout
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#000000"
tools:context=".FullScreenImage" >
<com.app.TouchImageView
android:id="#+id/imgFullScreen"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
</RelativeLayout>
Pass your bitmap this way
Intent intent = new Intent(this, NewActivity.class);
intent.putExtra("BitmapImage", bitmap);
Retrieve it this way (in FullScreenImageActivity)
Intent intent = getIntent();
Bitmap bitmap = (Bitmap) intent.getParcelableExtra("BitmapImage");
Related
Image activity
public class ImageAdapter extends BaseAdapter {
private Context context;
Bitmap bm;
ArrayList<String>images = new ArrayList<String>();
// Integer[] images;
void add(String path) {
images.add(path);
}
public ImageAdapter(Context c) {
context = c;
}
#Override
public int getCount() {
return images.size();
}
#Override
public Object getItem(int position) {
return images;
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView = new ImageView(context);
if (convertView == null) {
// imageView.setImageResource(images[position]);
// imageView.setImageBitmap(images);
imageView.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
imageView.setLayoutParams(new GridView.LayoutParams(240, 240));
return imageView;
} else {
imageView = (ImageView) convertView;
}
bm = decodeSampledBitmapFromUri(images.get(position), 220, 220);
imageView.setImageBitmap(bm);
return imageView;
}
private Bitmap decodeSampledBitmapFromUri(String path, int reqWidth, int reqHeight) {
Bitmap bm = null;
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(path, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
bm = BitmapFactory.decodeFile(path, options);
return bm;
}
public int calculateInSampleSize(
BitmapFactory.Options options, int reqWidth, int reqHeight) {
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
if (width > height) {
inSampleSize = Math.round((float)height / (float)reqHeight);
} else {
inSampleSize = Math.round((float)width / (float)reqWidth);
}
}
return inSampleSize;
}
}
Main Activity
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent i= new Intent(getApplicationContext(), FullImageActivity.class);
i.putExtra("id", position);
startActivity(i);
}
});
FullImageActivity
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_full_image);
Intent i=getIntent();
int position= i.getExtras().getInt("id");
ImageAdapter imageAdapter= new ImageAdapter(this);
ImageView imageView=(ImageView)findViewById(R.id.imageView);
imageView.setImageBitmap(imageAdapter.bm); \\here I have to show my images that are read from Storage
}
I can't able to pass it properly because my arraylist are string. I tried many ways that I know but that not work properly. I tried from internet also but not working.
I can't show my images through fullimage activity. I read images from SD card so It not showing in full view. Thanks in advance
Your code is not executing properly because it is not setup correctly.
First thing's first, consider using Picasso or Glide or UniversalImageLoader for loading your images into the placeholders to avoid making a clunky user experience scrolling through images.
Secondly, passing the position to the second activity is not your goal. You are trying to pass the image. So pass the image lol,
First on your getItem()
you should return the individual image based on position images.get(position)
rather then return images.
Secondly in your click handler
Either pass it as an extra like
intent.addExtra(myAdapter.getItem(position))
or if you have the list already just do
intent.addExtra(myList.get(position))
or simply cheat with ActivityTwo.imageToShow = myList.get(position)
startActivityTwo
anyone of these will work fine.
I have gridView that load images from sdcard/dcim/camera and shows them.
I want to put onclick listener on images and when I click on one it shoudl open that picture in other activity. How can I get image from gridView when I click on it.
error is on this line:
intent.putExtra("image", item.getImage());
how can I fix this or how else can I make it work ?
public class MainActivity extends Activity {
ImageAdapter myImageAdapter;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
GridView gridview = (GridView) findViewById(R.id.gridView);
myImageAdapter = new ImageAdapter(this);
gridview.setAdapter(myImageAdapter);
gridview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
ImageItem item = (ImageItem) parent.getItemAtPosition(position);
//Create intent
Intent intent = new Intent(MainActivity.this, DetailsActivity.class);
intent.putExtra("image", item.getImage()); // ERROR IS ON ITEM.GETIMAGE
//Start details activity
startActivity(intent);
}
});
String ExternalStorageDirectoryPath = Environment
.getExternalStorageDirectory()
.getAbsolutePath();
String targetPath = ExternalStorageDirectoryPath + "/DCIM/Camera/";
Toast.makeText(getApplicationContext(), targetPath, Toast.LENGTH_LONG).show();
File targetDirector = new File(targetPath);
File[] files = targetDirector.listFiles();
for (File file : files){
myImageAdapter.add(file.getAbsolutePath());
}
}
}
//*****************************************/
public class ImageItem {
private Bitmap image;
private String title;
public ImageItem(Bitmap image ) {
super();
this.image = image;
}
public Bitmap getImage() {
return image;
}
public void setImage(Bitmap image) {
this.image = image;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
}
//****************************************************/
public class ImageAdapter extends BaseAdapter {
private Context mContext;
ArrayList<String> itemList = new ArrayList<String>();
public ImageAdapter(Context c) {
mContext = c;
}
void add(String path){
itemList.add(path);
}
#Override
public int getCount() {
return itemList.size();
}
#Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return null;
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) { // if it's not recycled, initialize some attributes
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(220, 220));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(8, 8, 8, 8);
} else {
imageView = (ImageView) convertView;
}
Bitmap bm = decodeSampledBitmapFromUri(itemList.get(position), 220, 220);
imageView.setImageBitmap(bm);
return imageView;
}
public Bitmap decodeSampledBitmapFromUri(String path, int reqWidth, int reqHeight) {
Bitmap bm = null;
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(path, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
bm = BitmapFactory.decodeFile(path, options);
return bm;
}
public int calculateInSampleSize(
BitmapFactory.Options options, int reqWidth, int reqHeight) {
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
if (width > height) {
inSampleSize = Math.round((float)height / (float)reqHeight);
} else {
inSampleSize = Math.round((float)width / (float)reqWidth);
}
}
return inSampleSize;
}
}
//***********************************************/
public class DetailsActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.details_activity);
Bitmap bitmap = getIntent().getParcelableExtra("image");
ImageView imageView = (ImageView) findViewById(R.id.image1);
imageView.setImageBitmap(bitmap);
}
}
//*******************************************************/
activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#f0f0f0">
<GridView
android:id="#+id/gridView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:columnWidth="150dp"
android:drawSelectorOnTop="true"
android:gravity="center"
android:numColumns="auto_fit"
android:stretchMode="columnWidth"
android:verticalSpacing="5dp"
android:focusable="true"
android:clickable="true"/>
</RelativeLayout>
//*************************************************/
details_activity.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#000">
<ImageView
android:id="#+id/image1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:scaleType="fitCenter" />
</FrameLayout>
It is bad practice to pass bitmaps between activities.
The logical thing to do would be to pass the image path to the next activity and then decode the image in that activity based on the image view dimensions.
I hope this was helpful. :)
I'm new to android and have been working with a tutorial which loads all images from a directory on the SD card. I have the tutorial running but would like to add some code to the click listener which will load a full size version of the thumbnail in the gridview image adapter.
public class PicturesFragment extends Fragment {
public class ImageAdapter extends BaseAdapter {
private Context mContext;
ArrayList<String> itemList = new ArrayList<String>();
public ImageAdapter(Context c) {
mContext = c;
}
void add(String path) {
itemList.add(path);
}
#Override
public int getCount() {
return itemList.size();
}
#Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return itemList.get(position);
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) { // if it's not recycled, initialize some
// attributes
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(225, 225));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(1, 1, 1, 1);
} else {
imageView = (ImageView) convertView;
}
Bitmap bm = decodeSampledBitmapFromUri(itemList.get(position), 220,
220);
imageView.setImageBitmap(bm);
return imageView;
}
public Bitmap decodeSampledBitmapFromUri(String path, int reqWidth,
int reqHeight) {
Bitmap bm = null;
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(path, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth,
reqHeight);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
bm = BitmapFactory.decodeFile(path, options);
return bm;
}
public int calculateInSampleSize(
BitmapFactory.Options options, int reqWidth, int reqHeight) {
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
if (width > height) {
inSampleSize = Math.round((float) height
/ (float) reqHeight);
} else {
inSampleSize = Math.round((float) width / (float) reqWidth);
}
}
return inSampleSize;
}
}
ImageAdapter myImageAdapter;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.pictures_fragment, container, false);
GridView gridview = (GridView) rootView.findViewById(R.id.gridview);
myImageAdapter = new ImageAdapter(getActivity());
gridview.setAdapter(myImageAdapter);
String ExternalStorageDirectoryPath = Environment
.getExternalStorageDirectory().getAbsolutePath();
String targetPath = ExternalStorageDirectoryPath + "/myfilepath/Images";
Toast.makeText(getActivity().getApplicationContext(), targetPath, Toast.LENGTH_LONG)
.show();
File targetDirector = new File(targetPath);
File[] files = targetDirector.listFiles();
for (File file : files) {
myImageAdapter.add(file.getAbsolutePath());
}
gridview.setOnItemClickListener(myOnItemClickListener);
Button camerabtn = (Button) rootView.findViewById(R.id.camerabtn);
camerabtn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(v.getContext(), CameraActivity.class);
startActivityForResult(intent, 0);
}
});
return rootView;
}
Here's the click listener where I believe I should be implementing the code to solve this problem. I think I should be launching another activity (FullImageActivity.class) which just contains a layout with an imageview and pass the image which has been clicked to this new activity , but I have little know how to go about this
OnItemClickListener myOnItemClickListener = new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
String prompt = (String) parent.getItemAtPosition(position);
Toast.makeText(getActivity().getApplicationContext(), prompt, Toast.LENGTH_LONG)
.show();
//Intent i = new Intent(getActivity().getApplicationContext(), FullImageActivity.class);
// startActivity(i);
}
};
}
Any help would be greatly appreciated.
Yes, change the onItemClick like this..
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
String path = (String) myImageAdapter.getItem(position);
Intent intent = new Intent(this, FullImageActivity.class);
intent.putExtra("IMAGEPATH",path);
startActivity(intent);
}
And in FullImageActivity have a layout to show the full image from the path.
you can get the path in the FullImageActivity onCreate()
public class FullImageActivity extends ActionBarActivity{
#Override
public void onCreate(Bundle bundle){
super.onCreate(bundle);
setContentView(R.layout.image_layout);
String path = getIntent().getStringExtra("IMAGEPATH");
// load the image from the path and set it to the imageview in layout
}
}
i have been working on wallpaper app for a while and it's almost done but the size of app is pretty big cause i use .png extension so currently i'm trying to load jpg via assets instead of png in res
i tried to implement this answer
Images from Assets folder in a GridView
i get an error while loading the imageadapter
02-21 23:13:05.883: E/AndroidRuntime(17634): FATAL EXCEPTION: main
02-21 23:13:05.883: E/AndroidRuntime(17634): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.imagieview05/com.example.imagieview05.MainActivity}: java.lang.NullPointerException
here is my code
public class MainActivity extends Activity {
private GridView mGridView;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mGridView = (GridView) findViewById(R.id.GridView1);
Bitmap[] mBitArray = new Bitmap[4];
try {
mBitArray[0] = getBitmapFromAssets("g1p2.jpg");
mBitArray[1] = getBitmapFromAssets("g1p1.jpg");
mBitArray[2] = getBitmapFromAssets("g1p3.jpg");
mBitArray[3] = getBitmapFromAssets("g1p4.jpg");
} catch (Exception e) {
e.printStackTrace();
}
mGridView.setAdapter(new ImageAdapter(this ,mBitArray));
}
public Bitmap getBitmapFromAssets (String filename) throws IOException{
AssetManager assetManager = getAssets();
InputStream istr = assetManager.open(filename);
Bitmap bitmap = BitmapFactory.decodeStream(istr);
return bitmap;
}
public class ImageAdapter extends BaseAdapter{
private Context mContext;
private Bitmap[] mImageArray;
public GallaryAdapter(Context c, Bitmap[] mBitArray) {
c = mContext;
mBitArray = mImageArray;
}
public int getCount() {
return mImageArray.length;
}
public Object getItem(int position) {
// TODO Auto-generated method stub
return mImageArray[position];
}
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imgView = new ImageView(mContext);
imgView.setImageBitmap(mImageArray[position]);
//put black borders around the image
imgView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imgView.setLayoutParams(new GridView.LayoutParams(120, 120));
return imgView;
}
here is the original working code without Assets reference
public class MainActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
GridView gridView = (GridView) findViewById(R.id.GridView1);
gridView.setAdapter(new ImageAdapter(this));
public class ImageAdapter extends BaseAdapter {
private Context mContext;
public ImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
return mThumbIds.length;
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return 0;
}
// create a new ImageView for each item referenced by the Adapter
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) { // if it's not recycled, initialize some attributes
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(150, 150));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(8, 8, 8, 8);
} else {
imageView = (ImageView) convertView;
}
imageView.setImageResource(mThumbIds[position]);
return imageView;
}
// references to our images
private Integer[] mThumbIds = {
R.drawable.g1p1, R.drawable.g1p2,
R.drawable.g1p3, R.drawable.g1p4,
R.drawable.g1p5, R.drawable.g1p6,
R.drawable.g1p22, R.drawable.g1p33,
R.drawable.g1p44, R.drawable.g1p55,
R.drawable.g1p5, R.drawable.g1p6,
R.drawable.g1p22, R.drawable.g1p33,
R.drawable.g1p44, R.drawable.g1p55
};
};
thanks for help in advance
mBitArray = mImageArray; its pointing mBitArray toward mImageArray witch is nothing, maybe?
i dont think it really matters if you use jpeg or png memory wise anyway, in the program its going to completely uncompress the jpeg anyway
I wrote the code loader images from assets folder following the example code
private Bitmap decodeStreamFromAssets(String path, int reqWidth, int reqHeight) {
InputStream ims = null;
try {
ims = getAssets().open(path);
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeStream(ims, null, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
return BitmapFactory.decodeStream(ims, null, options);
}
catch (IOException e) {
e.printStackTrace();
}
finally {
if (ims != null) {
try {
ims.close();
}
catch (IOException e) {
e.printStackTrace();
}
}
}
return null;
}
private int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) {
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
final int halfHeight = height / 2;
final int halfWidth = width / 2;
// Calculate the largest inSampleSize value that is a power of 2 and keeps both
// height and width larger than the requested height and width.
while ((halfHeight / inSampleSize) > reqHeight
&& (halfWidth / inSampleSize) > reqWidth) {
inSampleSize *= 2;
}
}
return inSampleSize;
}
Load *.jpg work, but *.png not work for ex.
IMG // work
Bitmap bitmap = decodeStreamFromAssets("test.jpg", 64, 64);
if(bitmap1 != null){
imageViewTest.setImageBitmap(bitmap);
}
else {
Log.e("ERROR", "error");
}
PNG // not work ( is error )
Bitmap bitmap = decodeStreamFromAssets("test.png", 64, 64);
if(bitmap1 != null){
imageViewTest.setImageBitmap(bitmap);
}
else {
Log.e("ERROR", "error");
}
I'm new here and new in programming Android. I found this example (below is the example) on a site in internet, It's a great tutorial! What do I want to achieve is when once I clicked a picture on the GridView I want to show the full size of the Image.
public class MainActivity extends Activity {
public class ImageAdapter extends BaseAdapter {
private Context mContext;
ArrayList<String> itemList = new ArrayList<String>();
public ImageAdapter(Context c) {
mContext = c;
}
void add(String path) {
itemList.add(path);
}
#Override
public int getCount() {
return itemList.size();
}
#Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return null;
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) { // if it's not recycled, initialize some
// attributes
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(220, 220));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(8, 8, 8, 8);
} else {
imageView = (ImageView) convertView;
}
Bitmap bm = decodeSampledBitmapFromUri(itemList.get(position), 220,
220);
imageView.setImageBitmap(bm);
return imageView;
}
public Bitmap decodeSampledBitmapFromUri(String path, int reqWidth,
int reqHeight) {
Bitmap bm = null;
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(path, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth,
reqHeight);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
bm = BitmapFactory.decodeFile(path, options);
return bm;
}
public int calculateInSampleSize(
BitmapFactory.Options options, int reqWidth, int reqHeight) {
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
if (width > height) {
inSampleSize = Math.round((float) height
/ (float) reqHeight);
} else {
inSampleSize = Math.round((float) width / (float) reqWidth);
}
}
return inSampleSize;
}
}
ImageAdapter myImageAdapter;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
GridView gridview = (GridView) findViewById(R.id.gridview);
myImageAdapter = new ImageAdapter(this);
gridview.setAdapter(myImageAdapter);
String ExternalStorageDirectoryPath = Environment
.getExternalStorageDirectory().getAbsolutePath();
String targetPath = ExternalStorageDirectoryPath + "/test/";
Toast.makeText(getApplicationContext(), targetPath, Toast.LENGTH_LONG)
.show();
File targetDirector = new File(targetPath);
File[] files = targetDirector.listFiles();
for (File file : files) {
myImageAdapter.add(file.getAbsolutePath());
}
}
}
Pass the image to the other activity to show it in full view.
To pass the image from Your main Activity. USe following code:
gridview.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
ImageView img = ia.getView(position, v, parent);
img.buildDrawingCache();
Bitmap bmap = img.getDrawingCache();
Intent intent = new Intent(HelloGridView.this,
Imageviewer.class);
Bundle bundle = new Bundle();
//bundle.putParcelable("image", bmap);
String par=myimageadpter.getpath(position);
bundle.putParcelable("imagepath", par);
intent.putExtras(bundle);
startActivityForResult(intent, 0);
}
});
In other activity use this code to show the passed image:
Bundle bundle = this.getIntent().getExtras();
bmp=bundle.getParcelable("image");
ImageView img=(ImageView) findViewById(R.id.imageView1);
d =new BitmapDrawable(bmp);
img.setImageBitmap(bmp);
If you pass path. the second activity look like this:
Bundle bundle = this.getIntent().getExtras();
String s=bundle.getParcelable("imagepath");
Bitmap Imagefrompath = BitmapFactory.decodeFile(s);
ImageView img=(ImageView) findViewById(R.id.imageView1);
img.setImageBitmap(Imagefrompath );