如何调整图库中的高质量图像的尺寸以使其出现在图像视图中？

Question

in my app when i open gallery and pic an image it appears but when this image is high quality the image view show nothing also in another phone the image from camera appear horizontally by it self

class Horizontal : Fragment() , EasyPermissions.PermissionCallbacks{

    private var currentImage: Bitmap? = null
    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? { val view =inflater.inflate(R.layout.horizontal, container, false)

        val btng = view.findViewById<View>(R.id.btn_gallery_Hz) as FloatingActionButton

        btng.setOnClickListener {openGallary()
            selectImageInAlbum()}
        btng.scaleType = ImageView.ScaleType.CENTER
        return view}

    private fun selectImageInAlbum() {
        val intent = Intent(Intent.ACTION_GET_CONTENT)
        intent.type = "image/*"
        if (intent.resolveActivity(activity!!.packageManager) != null) {
            startActivityForResult(intent, 1} }




    override fun onStop() {
        super.onStop();if (currentImage != null)
        {currentImage!!.recycle();currentImage = null;System.gc()}}



    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)
        if (requestCode==2&&resultCode == Activity.RESULT_OK && null != data) {
            val selectedImages = data.data
            val filePathColon = arrayOf(MediaStore.Images.Media.DATA)
            val cursr = this.activity?.contentResolver?.query(selectedImages!!,
                filePathColon, null, null, null)
            cursr!!.moveToFirst()
            val columnindex = cursr.getColumnIndex(filePathColon[0])
            val picturepath = cursr.getString(columnindex)
            cursr.close()
            val intent = Intent(activity, ResHzL::class.java)
            intent.putExtra("asd", picturepath)
            startActivity(intent)}}




    @AfterPermissionGranted(2)
    private fun openGallary() {
        val perms = arrayOf(
            Manifest.permission.WRITE_EXTERNAL_STORAGE,
            Manifest.permission.READ_EXTERNAL_STORAGE)
        if (EasyPermissions.hasPermissions(this.activity!!, *perms)) {

            // Toast.makeText(activity, "Opening gallary", Toast.LENGTH_SHORT)
        } else {EasyPermissions.requestPermissions(this,
            getString(R.string.weneedper), 2, *perms) }}
    override fun onRequestPermissionsResult(
        requestCode: Int, permissions: Array<String>, grantResults: IntArray
    ) { super.onRequestPermissionsResult(requestCode, permissions, grantResults)
        EasyPermissions.onRequestPermissionsResult(requestCode, permissions, grantResults, this)}
    override fun onPermissionsDenied(requestCode: Int, perms: MutableList<String>) {
        if (EasyPermissions.somePermissionPermanentlyDenied(this, perms)) {
            AppSettingsDialog.Builder(this).build().show()}}
    override fun onPermissionsGranted(requestCode: Int, perms: MutableList<String>) {}}

And in the other activity i use this to show the image

val imageView = findViewById<View>(R.id.mainImg_Hz) as ImageView
        imageView.setImageBitmap(BitmapFactory.decodeFile(intent.getStringExtra("asd")))

Can any one could help ?

Answer 1

First of all you need to process this image so that you can reduce the size but quality you can maintain. You need to run a background task so that during big image process device doesn't fizz.

Then you can show a progress dialog during this process just add this code into your onCreate activity.

public ProgressDialog progressDialog;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

progressDialog = new ProgressDialog(MyProfileEidtActivity.this);
progressDialog.setMessage("Loading ...");


// just execute this process

new ImageProcessing().execute("YOUR IMAGE PATH");
}


public class ImageProcessing extends AsyncTask<String, Void, String> {

@Override
protected void onPreExecute() {
    super.onPreExecute();
    progressDialog.setMessage("Image Processing");
    progressDialog.setCancelable(false);
    progressDialog.show();
}

@Override
protected String doInBackground(String... strings) {
    Bitmap mainImage = null;
    Bitmap converetdImage = null;
    ByteArrayOutputStream bos = null;
    byte[] bt = null;
    String encodeString = null;
    try {
        mainImage = BitmapFactory.decodeFile(strings[0]);

    /// 500 means image size will be maximum 500 kb

        converetdImage = getResizedBitmap(mainImage, 500);
        bos = new ByteArrayOutputStream();
        converetdImage.compress(Bitmap.CompressFormat.JPEG, 50, bos);
        bt = bos.toByteArray();
        encodeString = Base64.encodeToString(bt, Base64.DEFAULT);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return encodeString;
 }

@Override
protected void onPostExecute(String image) {
    super.onPostExecute(s);
    progressDialog.dismiss();

 // this image will be your reduced image path

}
 }

public Bitmap getResizedBitmap(Bitmap image, int maxSize) {
int width = image.getWidth();
int height = image.getHeight();

float bitmapRatio = (float) width / (float) height;
if (bitmapRatio > 1) {
    width = maxSize;
    height = (int) (width / bitmapRatio);
} else {
    height = maxSize;
    width = (int) (height * bitmapRatio);
}
return Bitmap.createScaledBitmap(image, width, height, true);
}