how to upload images from sd card by picking over them in android
in my app i am trying to send images to a server that开发者_运维知识库 are stored in sd card. When i click a button it opens the sd card and shows the image in a grid view. From that the i want to upload the image which i am touching on it. I know to upload an image to a server, but i dont know to select an image from the sd card please help me.....
Following is my code....
public void library()
{
Intent myIntent = new Intent();
myIntent.setType("image/*");
myIntent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(myIntent,"Select Picture"), 101);
}
public void onActivityResult(int requestCode, int resultCode, Intent myIntent)
{
Intent data = null;
if (requestCode == 101 && data != null)
{
Uri selctedImageUri =data.getData();
}
else
{
Toast toast = Toast.makeText(this, "No Image is selected.", Toast.LENGTH_LONG);
toast.show();
}
}
how to proceed please help me.....
This is the Intent for getting Gallery images :
Intent intent = new Intent(Intent.ACTION_GET_CONTENT, null);
intent.setType("image/*");
intent.putExtra("return-data", true);
startActivityForResult(intent, 1);
Then this code is to set the image selected from the Gallery in the Image View : Use On ActivityResult fro this :
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case 1:
if(requestCode == 1 && data != null && data.getData() != null){
Uri _uri = data.getData();
if (_uri != null) {
//User had pick an image.
Cursor cursor = getContentResolver().query(_uri, new String[] { android.provider.MediaStore.Images.ImageColumns.DATA }, null, null, null);
cursor.moveToFirst();
//Link to the image
final String imageFilePath = cursor.getString(0);
Log.v("imageFilePath", imageFilePath);
File photos= new File(imageFilePath);
Bitmap b = decodeFile(photos);
b = Bitmap.createScaledBitmap(b,150, 150, true);
ImageView imageView = (ImageView) findViewById(R.id.select_image);
imageView.setImageBitmap(b);
cursor.close();
}
}
super.onActivityResult(requestCode, resultCode, data);
}
}
This Method for Reducing the Size of Image ;
private Bitmap decodeFile(File f){
try {
//decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeStream(new FileInputStream(f),null,o);
//Find the correct scale value. It should be the power of 2.
final int REQUIRED_SIZE=70;
int width_tmp=o.outWidth, height_tmp=o.outHeight;
int scale=1;
while(true){
if(width_tmp/2<REQUIRED_SIZE || height_tmp/2<REQUIRED_SIZE)
break;
width_tmp/=2;
height_tmp/=2;
scale++;
}
//decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize=scale;
return BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
} catch (FileNotFoundException e) {}
return null;
}
In these method if you Pass a File that contains image it will Resize the image and returns BITMAP..
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