Mercurial > cgi-bin > hgweb.cgi > SimpleResizer
view app/src/main/java/com/bartsent/simpleresizer/EditImage.kt @ 40:cfb19d4ccf78
About screen (but it has broken Edit screen).
author | David Barts <n5jrn@me.com> |
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date | Mon, 05 Apr 2021 09:08:31 -0700 |
parents | 0dbd924cb5e8 |
children | 45e4df5226c0 |
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package com.bartsent.simpleresizer import android.Manifest import android.content.ContentValues import android.content.Intent import android.content.pm.PackageManager import android.graphics.Bitmap import android.graphics.BitmapFactory import android.graphics.Canvas import android.graphics.Matrix import android.net.Uri import android.os.Bundle import android.os.Environment import android.provider.MediaStore import android.provider.OpenableColumns import android.util.Log import android.view.Menu import android.view.MenuItem import android.view.View import android.widget.EditText import android.widget.ProgressBar import android.widget.Toast import androidx.appcompat.app.AlertDialog import androidx.appcompat.app.AppCompatActivity import androidx.appcompat.widget.PopupMenu import androidx.lifecycle.ViewModel import androidx.lifecycle.ViewModelProvider import androidx.preference.PreferenceManager import com.bartsent.simpleresizer.databinding.ActivityEditImageBinding import com.bartsent.simpleresizer.lib.ThreadPools import com.bartsent.simpleresizer.lib.getScaledInstance import java.io.File import java.io.IOException import java.util.concurrent.Callable import java.util.concurrent.Future class EditImage : AppCompatActivity() { class State: ViewModel() { var uri: Uri? = null var bitmap: Bitmap? = null var reader: Future<Unit>? = null } private lateinit var viewModel: State private val STDDIMS = arrayOf<Int>(1600, 1280, 1024, 800, 640, 512, 400, 320).apply { sort() } private lateinit var binding: ActivityEditImageBinding override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) binding = ActivityEditImageBinding.inflate(layoutInflater) setContentView(binding.root) PreferenceManager.setDefaultValues(applicationContext, R.xml.root_preferences, false) viewModel = ViewModelProvider(this).get(State::class.java) } override fun onCreateOptionsMenu(menu: Menu?): Boolean { menuInflater.inflate(R.menu.menu_edit, menu) return super.onCreateOptionsMenu(menu) } override fun onOptionsItemSelected(item: MenuItem): Boolean { when (item.itemId) { R.id.settings_item -> { startActivity( Intent(Intent.ACTION_APPLICATION_PREFERENCES, null, this, SettingsActivity::class.java)) return true } R.id.about_item -> { startActivity(Intent(this, About::class.java )) return true } else -> return false } } // Cribbed from: https://stackoverflow.com/questions/5568874/how-to-extract-the-file-name-from-uri-returned-from-intent-action-get-content private fun getFileName(uri: Uri): String? { var result: String? = null if (uri.scheme == "content") { contentResolver.query(uri, null, null, null, null).use { cursor -> if (cursor != null && cursor.moveToFirst()) result = cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME)) } } if (result == null) { val uriPath = uri.path result = uriPath?.substring(uriPath.lastIndexOf('/') + 1) } return result } private fun showFatalError(message: String): Unit { AlertDialog.Builder(this).also { it.setMessage(message) it.setNeutralButton(R.string.ok_text) { dialog, _ -> dialog.dismiss() } it.setOnDismissListener { finish() } it.create() }.show() } fun showError(message: String): Unit { AlertDialog.Builder(this).also { it.setMessage(message) it.setNeutralButton(R.string.ok_text) { dialog, _ -> dialog.dismiss() } it.create() }.show() } override fun onResume() { super.onResume() // Read the URI, die if we can't. val imageUri = intent?.data ?: intent?.extras?.get(Intent.EXTRA_STREAM) as? Uri if (imageUri == null) { if (viewModel.bitmap == null) showFatalError(getString(R.string.error_no_uri)) else setImage(viewModel.bitmap!!) return } // User has opened a new image. if (imageUri != viewModel.uri) { viewModel.uri = imageUri binding.progressBar.visibility = ProgressBar.VISIBLE viewModel.reader = ThreadPools.WORKERS.submit(Callable<Unit> { val newBitmap = contentResolver.openInputStream(imageUri).use { BitmapFactory.decodeStream(it) } runOnUiThread { binding.progressBar.visibility = ProgressBar.INVISIBLE if (newBitmap == null) showFatalError(getString(R.string.error_bad_image)) else setImage(newBitmap) viewModel.reader = null } }) return } // Rotation (of the phone). val oldBitmap = viewModel.bitmap if (oldBitmap != null) setImage(oldBitmap) } override fun onDestroy() { // Read tasks may get badly constipated, since the image may well be on // cloud server like Google Pictures. So be sure to terminate any active // read task with extreme prejudice. val reader = viewModel.reader if (reader != null) { reader.cancel(true) viewModel.reader = null } super.onDestroy() } private fun setImage(image: Bitmap): Unit { binding.imageSize.text = getString(R.string.image_size_text, image.width, image.height) binding.image.setImageBitmap(image) viewModel.bitmap = image binding.root.invalidate() } private fun unsetImage(): Unit { viewModel.uri = null viewModel.bitmap = null } private val CUSTOM = 999998 private val CANCEL = 999999 fun scaleClicked(view: View): Unit { val (maxSize, horizontal) = viewModel.bitmap!!.run { if (width > height) Pair(width, true) else Pair(height, false) } PopupMenu(this, view).apply { menu.run { STDDIMS.filter { it < maxSize }.forEach { major -> val minor = major * 3 / 4 add(Menu.NONE, major, Menu.NONE, if (horizontal) "$major ✕ $minor" else "$minor ✕ $major") } add(Menu.NONE, CUSTOM, Menu.NONE, R.string.custom_text) add(Menu.NONE, CANCEL, Menu.NONE, R.string.cancel_text) } setOnMenuItemClickListener(::scaleMenuItemClicked) show() } } private fun scaleMenuItemClicked(item: MenuItem) : Boolean = when (item.itemId) { CUSTOM -> { showCustomScaleDialog(); true } CANCEL -> true in STDDIMS -> { doScale(item.itemId); true } else -> false } private fun copyColorSpace(old: Bitmap, new: Bitmap): Unit { if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) { val oldColorSpace = old.colorSpace if (oldColorSpace != null) new.setColorSpace(oldColorSpace) } } private fun doScale(newMax: Int): Unit { val oldBitmap = viewModel.bitmap!! val factor = newMax.toDouble() / maxOf(oldBitmap.width, oldBitmap.height).toDouble() if (factor >= 1.0) { throw IllegalArgumentException("can only scale down") } val scaleType = PreferenceManager.getDefaultSharedPreferences(applicationContext).getString( "scale_type", "speed" ) Log.d("EditImage", "scaling, scale_type = $scaleType") binding.progressBar.visibility = ProgressBar.VISIBLE ThreadPools.WORKERS.execute { val newWidth = (oldBitmap.width.toDouble() * factor + 0.5).toInt() val newHeight = (oldBitmap.height.toDouble() * factor + 0.5).toInt() val newBitmap = if (scaleType == "quality") oldBitmap.getScaledInstance(newWidth, newHeight) else Bitmap.createScaledBitmap(oldBitmap, newWidth, newHeight, true) runOnUiThread { binding.progressBar.visibility = ProgressBar.INVISIBLE setImage(newBitmap) } } } private fun showCustomScaleDialog(): Unit { val image = viewModel.bitmap!! val curMaxDim = maxOf(image.width, image.height) val dialogView = layoutInflater.inflate(R.layout.dialog_custom_scale, null) AlertDialog.Builder(this).also { it.setPositiveButton(R.string.ok_text) { dialog, _ -> val maxDim = dialogView.findViewById<EditText>(R.id.custom_scale)?.text.toString().toIntOrNull() dialog.dismiss() if (maxDim == null || maxDim < 8 || maxDim >= curMaxDim) { Toast.makeText(applicationContext, R.string.bad_scale, Toast.LENGTH_LONG).show() } else { doScale(maxDim) } } it.setNegativeButton(R.string.cancel_text) { dialog, _ -> dialog.dismiss() } it.setView(dialogView) it.create() }.show() } fun rotateClicked(view: View): Unit { PopupMenu(this, view).apply { setOnMenuItemClickListener { when(it.itemId) { R.id.r_90_cw -> { doRotate(90) true } R.id.r_180 -> { doRotate(180) true } R.id.r_90_ccw -> { doRotate(270) true } R.id.r_cancel -> true else -> false } } inflate(R.menu.rotate) show() } } private fun doRotate(deg: Int): Unit { val oldBitmap = viewModel.bitmap!! if (deg % 90 != 0) { throw IllegalArgumentException("$deg not a multiple of 90") } val (w, h) = if (deg % 180 == 0) Pair(oldBitmap.width, oldBitmap.height) else Pair(oldBitmap.height, oldBitmap.width) val rotater = Matrix().apply { setRotate(deg.toFloat(), oldBitmap.width.toFloat()/2.0f, oldBitmap.height.toFloat()/2.0f) postTranslate((w - oldBitmap.width).toFloat()/2.0f, (h - oldBitmap.height).toFloat()/2.0f) } binding.progressBar.visibility = ProgressBar.VISIBLE ThreadPools.WORKERS.execute { val newBitmap = Bitmap.createBitmap(w, h, oldBitmap.config) copyColorSpace(oldBitmap, newBitmap) Canvas(newBitmap).run { drawBitmap(oldBitmap, rotater, null) } runOnUiThread { binding.progressBar.visibility = ProgressBar.INVISIBLE setImage(newBitmap) } } } fun cancelClicked(view: View): Unit { unsetImage() finish() } private val REQUEST_WRITE_EXTERNAL = 42 override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<String>, grantResults: IntArray): Unit { if (requestCode != REQUEST_WRITE_EXTERNAL) { Log.e("EditImage", "unexpected request code in onRequestPermissionsResult!") return } if ((grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED)) { doneClicked(null) } else { showError(getString(R.string.error_unable_no_permissions)) } } fun requestWritePermission(): Unit { requestPermissions(arrayOf(Manifest.permission.WRITE_EXTERNAL_STORAGE), REQUEST_WRITE_EXTERNAL) } fun doneClicked(view: View?): Unit { // If we need WRITE_EXTERNAL_STORAGE, request it and bail. We will be called again // (with the permission) if it is granted. if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.Q) { if (checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) { if (shouldShowRequestPermissionRationale(Manifest.permission.WRITE_EXTERNAL_STORAGE)) AlertDialog.Builder(this).also { it.setMessage(getString(R.string.permission_needed, getString(R.string.app_name))) it.setNeutralButton(R.string.ok_text) { dialog, _ -> dialog.dismiss() requestWritePermission() } it.create() }.show() else requestWritePermission() return } } // If we get here, we have permission to save (if we need it). val image = viewModel.bitmap!! binding.progressBar.visibility = ProgressBar.VISIBLE ThreadPools.WORKERS.execute { val contentValues = ContentValues().apply { var fileName = getFileName(viewModel.uri!!) if (fileName == null) { val d = java.util.Date() fileName = "IMG_%tY%tm%td_%tH%tM%tS".format(d, d, d, d, d, d) } val dot = fileName.lastIndexOf('.') if (dot != -1) fileName = fileName.substring(0, dot) fileName = "${fileName}_${image.width}x${image.height}.jpg" put(MediaStore.MediaColumns.DISPLAY_NAME, fileName) put(MediaStore.MediaColumns.MIME_TYPE, "image/jpeg") if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.Q) { put(MediaStore.MediaColumns.RELATIVE_PATH, File(Environment.DIRECTORY_PICTURES, getString(R.string.app_name)).path) } } var errorMessage: String? = null try { val myUri = contentResolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, contentValues) if (myUri == null) { throw IOException(getString(R.string.error_create_mediastore)) } val stream = contentResolver.openOutputStream(myUri) if (stream == null) { throw IOException(getString(R.string.error_get_output)) } val quality = maxOf(0, minOf(100, PreferenceManager.getDefaultSharedPreferences(applicationContext).getInt( "jpeg_quality", 85))) Log.d("EditImage", "saving, jpeg_quality = $quality") stream.use { if (!image.compress(Bitmap.CompressFormat.JPEG, quality, it)) { throw IOException(getString(R.string.error_save_bitmap)) } } } catch (ioe: IOException) { errorMessage = ioe.message ?: getString(R.string.error_io) } catch (se: SecurityException) { errorMessage = se.message ?: getString(R.string.error_security) } catch (e: Exception) { Log.e("EditImage", "unexpected exception when saving!", e) errorMessage = e.message ?: getString(R.string.error_unexpected, e::class.qualifiedName) } runOnUiThread { binding.progressBar.visibility = ProgressBar.INVISIBLE if (errorMessage == null) { unsetImage() finish() } else { showError(errorMessage) } } } } }