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public class MainActivity extends Activity {
//define global views variable
public ImageView imageView;
public Button selectImage,
uploadImage;
public String SERVER = "http://x.x.x.x:8090/up",
timestamp;
private static final String TAG = MainActivity.class.getSimpleName();
private static final int RESULT_SELECT_IMAGE = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//instantiate view
imageView = (ImageView) findViewById(R.id.imageView);
selectImage = (Button) findViewById(R.id.selectImage);
uploadImage = (Button) findViewById(R.id.uploadImage);
//when selectImage button is pressed
selectImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//call the function to select image from album
selectImage();
}
});
//when uploadImage button is pressed
uploadImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//get image in bitmap format
Bitmap image = ((BitmapDrawable) imageView.getDrawable()).getBitmap();
//execute the async task and upload the image to server
new Upload(image,"IMG_"+timestamp).execute();
}
});
}
//function to select a image
private void selectImage(){
//open album to select image
Intent gallaryIntent = new Intent(Intent.ACTION_PICK,MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(gallaryIntent, RESULT_SELECT_IMAGE);
}
/*
* This function is called when we pick some image from the album
* */
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RESULT_SELECT_IMAGE && resultCode == RESULT_OK && data != null){
//set the selected image to image variable
Uri image = data.getData();
imageView.setImageURI(image);
//get the current timeStamp and strore that in the time Variable
Long tsLong = System.currentTimeMillis() / 1000;
timestamp = tsLong.toString();
Toast.makeText(getApplicationContext(),timestamp,Toast.LENGTH_SHORT).show();
}
}
private String hashMapToUrl(HashMap<String, String> params) throws UnsupportedEncodingException {
StringBuilder result = new StringBuilder();
boolean first = true;
for(Map.Entry<String, String> entry : params.entrySet()){
if (first)
first = false;
else
result.append("&");
result.append(URLEncoder.encode(entry.getKey(), "UTF-8"));
result.append("=");
result.append(URLEncoder.encode(entry.getValue(), "UTF-8"));
}
return result.toString();
}
//async task to upload image
private class Upload extends AsyncTask<Void,Void,String>{
private Bitmap image;
private String name;
public Upload(Bitmap image,String name){
this.image = image;
this.name = name;
}
@Override
protected String doInBackground(Void... params) {
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
//compress the image to jpg format
image.compress(Bitmap.CompressFormat.JPEG,100,byteArrayOutputStream);
/*
* encode image to base64 so that it can be picked by saveImage.php file
* */
String encodeImage = Base64.encodeToString(byteArrayOutputStream.toByteArray(),Base64.DEFAULT);
//generate hashMap to store encodedImage and the name
HashMap<String,String> detail = new HashMap<>();
detail.put("name", name);
detail.put("image", encodeImage);
try{
//convert this HashMap to encodedUrl to send to php file
String dataToSend = hashMapToUrl(detail);
//make a Http request and send data to saveImage.php file
String response = Request.post(SERVER,dataToSend);
//return the response
return response;
}catch (Exception e){
e.printStackTrace();
Log.e(TAG,"ERROR "+e);
return null;
}
}
@Override
protected void onPostExecute(String s) {
//show image uploaded
Toast.makeText(getApplicationContext(),"Image Uploaded",Toast.LENGTH_SHORT).show();
}
}
} |
