diff --git a/android/translate/LICENSE b/android/translate/LICENSE
new file mode 100644
index 0000000000..973b3b7670
--- /dev/null
+++ b/android/translate/LICENSE
@@ -0,0 +1,191 @@
+ Copyright 2020 Google LLC
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ https://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+
+ Apache License
+ Version 2.0, January 2004
+ http://www.apache.org/licenses/
+
+ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+ 1. Definitions.
+
+ "License" shall mean the terms and conditions for use, reproduction,
+ and distribution as defined by Sections 1 through 9 of this document.
+
+ "Licensor" shall mean the copyright owner or entity authorized by
+ the copyright owner that is granting the License.
+
+ "Legal Entity" shall mean the union of the acting entity and all
+ other entities that control, are controlled by, or are under common
+ control with that entity. For the purposes of this definition,
+ "control" means (i) the power, direct or indirect, to cause the
+ direction or management of such entity, whether by contract or
+ otherwise, or (ii) ownership of fifty percent (50%) or more of the
+ outstanding shares, or (iii) beneficial ownership of such entity.
+
+ "You" (or "Your") shall mean an individual or Legal Entity
+ exercising permissions granted by this License.
+
+ "Source" form shall mean the preferred form for making modifications,
+ including but not limited to software source code, documentation
+ source, and configuration files.
+
+ "Object" form shall mean any form resulting from mechanical
+ transformation or translation of a Source form, including but
+ not limited to compiled object code, generated documentation,
+ and conversions to other media types.
+
+ "Work" shall mean the work of authorship, whether in Source or
+ Object form, made available under the License, as indicated by a
+ copyright notice that is included in or attached to the work
+ (an example is provided in the Appendix below).
+
+ "Derivative Works" shall mean any work, whether in Source or Object
+ form, that is based on (or derived from) the Work and for which the
+ editorial revisions, annotations, elaborations, or other modifications
+ represent, as a whole, an original work of authorship. For the purposes
+ of this License, Derivative Works shall not include works that remain
+ separable from, or merely link (or bind by name) to the interfaces of,
+ the Work and Derivative Works thereof.
+
+ "Contribution" shall mean any work of authorship, including
+ the original version of the Work and any modifications or additions
+ to that Work or Derivative Works thereof, that is intentionally
+ submitted to Licensor for inclusion in the Work by the copyright owner
+ or by an individual or Legal Entity authorized to submit on behalf of
+ the copyright owner. For the purposes of this definition, "submitted"
+ means any form of electronic, verbal, or written communication sent
+ to the Licensor or its representatives, including but not limited to
+ communication on electronic mailing lists, source code control systems,
+ and issue tracking systems that are managed by, or on behalf of, the
+ Licensor for the purpose of discussing and improving the Work, but
+ excluding communication that is conspicuously marked or otherwise
+ designated in writing by the copyright owner as "Not a Contribution."
+
+ "Contributor" shall mean Licensor and any individual or Legal Entity
+ on behalf of whom a Contribution has been received by Licensor and
+ subsequently incorporated within the Work.
+
+ 2. Grant of Copyright License. Subject to the terms and conditions of
+ this License, each Contributor hereby grants to You a perpetual,
+ worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+ copyright license to reproduce, prepare Derivative Works of,
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+ Work and such Derivative Works in Source or Object form.
+
+ 3. Grant of Patent License. Subject to the terms and conditions of
+ this License, each Contributor hereby grants to You a perpetual,
+ worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+ (except as stated in this section) patent license to make, have made,
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+ where such license applies only to those patent claims licensable
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+ granted to You under this License for that Work shall terminate
+ as of the date such litigation is filed.
+
+ 4. Redistribution. You may reproduce and distribute copies of the
+ Work or Derivative Works thereof in any medium, with or without
+ modifications, and in Source or Object form, provided that You
+ meet the following conditions:
+
+ (a) You must give any other recipients of the Work or
+ Derivative Works a copy of this License; and
+
+ (b) You must cause any modified files to carry prominent notices
+ stating that You changed the files; and
+
+ (c) You must retain, in the Source form of any Derivative Works
+ that You distribute, all copyright, patent, trademark, and
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+ (d) If the Work includes a "NOTICE" text file as part of its
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+ of the following places: within a NOTICE text file distributed
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+ within a display generated by the Derivative Works, if and
+ wherever such third-party notices normally appear. The contents
+ of the NOTICE file are for informational purposes only and
+ do not modify the License. You may add Your own attribution
+ notices within Derivative Works that You distribute, alongside
+ or as an addendum to the NOTICE text from the Work, provided
+ that such additional attribution notices cannot be construed
+ as modifying the License.
+
+ You may add Your own copyright statement to Your modifications and
+ may provide additional or different license terms and conditions
+ for use, reproduction, or distribution of Your modifications, or
+ for any such Derivative Works as a whole, provided Your use,
+ reproduction, and distribution of the Work otherwise complies with
+ the conditions stated in this License.
+
+ 5. Submission of Contributions. Unless You explicitly state otherwise,
+ any Contribution intentionally submitted for inclusion in the Work
+ by You to the Licensor shall be under the terms and conditions of
+ this License, without any additional terms or conditions.
+ Notwithstanding the above, nothing herein shall supersede or modify
+ the terms of any separate license agreement you may have executed
+ with Licensor regarding such Contributions.
+
+ 6. Trademarks. This License does not grant permission to use the trade
+ names, trademarks, service marks, or product names of the Licensor,
+ except as required for reasonable and customary use in describing the
+ origin of the Work and reproducing the content of the NOTICE file.
+
+ 7. Disclaimer of Warranty. Unless required by applicable law or
+ agreed to in writing, Licensor provides the Work (and each
+ Contributor provides its Contributions) on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ implied, including, without limitation, any warranties or conditions
+ of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+ PARTICULAR PURPOSE. You are solely responsible for determining the
+ appropriateness of using or redistributing the Work and assume any
+ risks associated with Your exercise of permissions under this License.
+
+ 8. Limitation of Liability. In no event and under no legal theory,
+ whether in tort (including negligence), contract, or otherwise,
+ unless required by applicable law (such as deliberate and grossly
+ negligent acts) or agreed to in writing, shall any Contributor be
+ liable to You for damages, including any direct, indirect, special,
+ incidental, or consequential damages of any character arising as a
+ result of this License or out of the use or inability to use the
+ Work (including but not limited to damages for loss of goodwill,
+ work stoppage, computer failure or malfunction, or any and all
+ other commercial damages or losses), even if such Contributor
+ has been advised of the possibility of such damages.
+
+ 9. Accepting Warranty or Additional Liability. While redistributing
+ the Work or Derivative Works thereof, You may choose to offer,
+ and charge a fee for, acceptance of support, warranty, indemnity,
+ or other liability obligations and/or rights consistent with this
+ License. However, in accepting such obligations, You may act only
+ on Your own behalf and on Your sole responsibility, not on behalf
+ of any other Contributor, and only if You agree to indemnify,
+ defend, and hold each Contributor harmless for any liability
+ incurred by, or claims asserted against, such Contributor by reason
+ of your accepting any such warranty or additional liability.
+
+ END OF TERMS AND CONDITIONS
diff --git a/android/translate/app/build.gradle b/android/translate/app/build.gradle
index abb97902ba..af34cf7da5 100644
--- a/android/translate/app/build.gradle
+++ b/android/translate/app/build.gradle
@@ -1,59 +1,43 @@
-/*
- * Copyright 2019 Google Inc. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
android {
- compileSdkVersion 29
+ compileSdkVersion 30
defaultConfig {
- applicationId "com.google.mlkit.samples.translate"
+ applicationId 'com.google.mlkit.samples.nl.translate'
+ // The SDK only requires minSdkVersion 16. We are using minSdkVersion
+ // 21 to make some code in the sample shorter.
minSdkVersion 21
- targetSdkVersion 29
+ targetSdkVersion 30
+ multiDexEnabled true
versionCode 1
versionName "1.0"
+ setProperty("archivesBaseName", "mlkit_translate_sample")
}
+
buildTypes {
release {
minifyEnabled false
- proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+ proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
+
compileOptions {
- sourceCompatibility = '1.8'
- targetCompatibility = '1.8'
+ sourceCompatibility JavaVersion.VERSION_1_8
+ targetCompatibility JavaVersion.VERSION_1_8
}
}
dependencies {
implementation project(':internal:chooserx')
- implementation project(":internal:lintchecks")
- implementation fileTree(dir: 'libs', include: ['*.jar'])
- implementation "org.jetbrains.kotlin:kotlin-stdlib:1.3.72"
+ implementation 'com.google.mlkit:translate:16.1.2'
- implementation 'androidx.media:media:1.1.0'
+ // Those dependencies are not required by the SDK. They are used for the sample itself.
+ implementation 'androidx.core:core-ktx:1.3.0'
+ implementation 'androidx.multidex:multidex:2.0.1'
+ implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+ implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'com.google.android.material:material:1.2.0'
- implementation 'androidx.constraintlayout:constraintlayout:2.0.0'
- implementation 'androidx.recyclerview:recyclerview:1.1.0'
- implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0'
- implementation 'org.apache.commons:commons-collections4:4.4'
- implementation 'com.google.guava:guava:27.1-android'
-
- implementation 'com.google.mlkit:translate:16.1.1'
-
- testImplementation 'junit:junit:4.13'
+ implementation 'com.google.guava:guava:24.1-android'
}
diff --git a/android/translate/app/src/main/AndroidManifest.xml b/android/translate/app/src/main/AndroidManifest.xml
index b8838e4bbb..ff7a611fdf 100644
--- a/android/translate/app/src/main/AndroidManifest.xml
+++ b/android/translate/app/src/main/AndroidManifest.xml
@@ -1,47 +1,50 @@
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+ package="com.google.mlkit.samples.nl.translate"
+ android:versionCode="1"
+ android:versionName="v1">
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/android/translate/app/src/main/java/com/google/mlkit/samples/nl/translate/EntryChoiceActivity.kt b/android/translate/app/src/main/java/com/google/mlkit/samples/nl/translate/EntryChoiceActivity.kt
new file mode 100644
index 0000000000..1b20371867
--- /dev/null
+++ b/android/translate/app/src/main/java/com/google/mlkit/samples/nl/translate/EntryChoiceActivity.kt
@@ -0,0 +1,25 @@
+package com.google.mlkit.samples.nl.translate
+
+import android.content.Intent
+import com.google.mlkit.samples.nl.translate.java.MainActivityJava
+import com.google.mlkit.samples.nl.translate.kotlin.MainActivityKotlin
+import com.mlkit.example.internal.BaseEntryChoiceActivity
+import com.mlkit.example.internal.Choice
+
+class EntryChoiceActivity : BaseEntryChoiceActivity() {
+
+ override fun getChoices(): List {
+ return listOf(
+ Choice(
+ "Java",
+ "Run the ML Kit Translate quickstart written in Java.",
+ Intent(this, MainActivityJava::class.java)
+ ),
+ Choice(
+ "Kotlin",
+ "Run the ML Kit Translate quickstart written in Kotlin.",
+ Intent(this, MainActivityKotlin::class.java)
+ )
+ )
+ }
+}
diff --git a/android/translate/app/src/main/java/com/google/mlkit/samples/nl/translate/java/MainActivityJava.java b/android/translate/app/src/main/java/com/google/mlkit/samples/nl/translate/java/MainActivityJava.java
new file mode 100644
index 0000000000..ff22f34a41
--- /dev/null
+++ b/android/translate/app/src/main/java/com/google/mlkit/samples/nl/translate/java/MainActivityJava.java
@@ -0,0 +1,207 @@
+package com.google.mlkit.samples.nl.translate.java;
+
+import android.app.ProgressDialog;
+import android.os.Bundle;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.appcompat.app.AppCompatActivity;
+import android.util.Log;
+import android.util.LruCache;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.inputmethod.EditorInfo;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.AdapterView;
+import android.widget.AdapterView.OnItemSelectedListener;
+import android.widget.ArrayAdapter;
+import android.widget.EditText;
+import android.widget.Spinner;
+import android.widget.TextView;
+import android.widget.Toast;
+import com.google.common.collect.ImmutableList;
+import com.google.mlkit.nl.translate.TranslateLanguage;
+import com.google.mlkit.nl.translate.TranslateLanguage.Language;
+import com.google.mlkit.nl.translate.Translation;
+import com.google.mlkit.nl.translate.Translator;
+import com.google.mlkit.nl.translate.TranslatorOptions;
+import com.google.mlkit.samples.nl.translate.R;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Locale;
+
+public class MainActivityJava extends AppCompatActivity {
+
+ private static final String TAG = MainActivityJava.class.getCanonicalName();
+ /**
+ * This specifies the number of translators instance we want to keep in our LRU cache. Each
+ * instance of the translator is built with different options based on the source language and the
+ * target language, and since we want to be able to manage the number of translator instances to
+ * keep around, an LRU cache is an easy way to achieve this.
+ */
+ private static final int NUM_TRANSLATORS = 3;
+
+ /** Current translatorOptions for the selected source and target languages */
+ private TranslatorOptions translatorOptions;
+
+ private final LruCache translatorsCache =
+ new LruCache(NUM_TRANSLATORS) {
+ @Override
+ public Translator create(TranslatorOptions options) {
+ return Translation.getClient(options);
+ }
+
+ @Override
+ public void entryRemoved(
+ boolean evicted, TranslatorOptions key, Translator oldValue, Translator newValue) {
+ oldValue.close();
+ }
+ };
+
+ /** Text box where the user types in their language */
+ private EditText sourceBox;
+ /** Text box where translated text will appear */
+ private TextView targetBox;
+
+ private ImmutableList languages;
+ private Spinner sourceLanguageSpinner;
+ private Spinner targetLanguageSpinner;
+
+ @Override
+ protected void onCreate(@Nullable Bundle bundle) {
+ super.onCreate(bundle);
+ setContentView(R.layout.activity_main);
+ sourceBox = findViewById(R.id.sourceBox);
+ targetBox = findViewById(R.id.targetBox);
+ sourceLanguageSpinner = findViewById(R.id.sourceLanguageSpinner);
+ targetLanguageSpinner = findViewById(R.id.targetLanguageSpinner);
+
+ sourceBox.setOnEditorActionListener(
+ (v, actionId, event) -> {
+ if (actionId == EditorInfo.IME_ACTION_SEND) {
+ closeKeyboard();
+ translate(v.getText().toString());
+ return true;
+ }
+ return false;
+ });
+ findViewById(R.id.translateButton)
+ .setOnClickListener(v -> translate(sourceBox.getText().toString()));
+
+ List languageNames = buildLanguagesList();
+ setupLanguageSpinner(sourceLanguageSpinner, languageNames, TranslateLanguage.GERMAN);
+ setupLanguageSpinner(targetLanguageSpinner, languageNames, TranslateLanguage.FRENCH);
+ }
+
+ @Override
+ public boolean onCreateOptionsMenu(Menu menu) {
+ getMenuInflater().inflate(R.menu.menu_translate, menu);
+ return super.onCreateOptionsMenu(menu);
+ }
+
+ @Override
+ public boolean onOptionsItemSelected(MenuItem item) {
+ if (item.getItemId() == R.id.model_management) {
+ startActivity(ModelManagementActivityJava.makeLaunchIntent(this));
+ return true;
+ }
+ return super.onOptionsItemSelected(item);
+ }
+
+ @Override
+ protected void onDestroy() {
+ translatorsCache.evictAll();
+ super.onDestroy();
+ }
+
+ // This returns a list of language names (user readable) but also builds the `languages` field,
+ // with the list of TranslateLanguages.
+ private ImmutableList buildLanguagesList() {
+ List languageSet = TranslateLanguage.getAllLanguages();
+ List locales = new ArrayList<>(languageSet.size());
+ for (/* @Language */ String language : languageSet) {
+ locales.add(new Locale(language));
+ }
+ Collections.sort(
+ locales, (l1, l2) -> l1.getDisplayLanguage().compareTo(l2.getDisplayLanguage()));
+
+ ImmutableList.Builder languagesBuilder = new ImmutableList.Builder<>();
+ ImmutableList.Builder languageNames = new ImmutableList.Builder<>();
+ for (Locale locale : locales) {
+ languagesBuilder.add(locale.getLanguage());
+ languageNames.add(locale.getDisplayLanguage());
+ }
+ languages = languagesBuilder.build();
+
+ return languageNames.build();
+ }
+
+ private void setupLanguageSpinner(
+ Spinner spinner, List languageNames, @Language String defaultValue) {
+ spinner.setAdapter(
+ new ArrayAdapter<>(this, android.R.layout.simple_dropdown_item_1line, languageNames));
+ spinner.setOnItemSelectedListener(
+ new OnItemSelectedListener() {
+ @Override
+ public void onItemSelected(AdapterView parent, View view, int position, long id) {
+ MainActivityJava.this.updateLanguages();
+ }
+
+ @Override
+ public void onNothingSelected(AdapterView parent) {}
+ });
+ spinner.setSelection(languages.indexOf(defaultValue));
+ }
+
+ private void updateLanguages() {
+ @Language
+ String sourceLanguage =
+ languages.get(Math.max(sourceLanguageSpinner.getSelectedItemPosition(), 0));
+ @Language
+ String targetLanguage =
+ languages.get(Math.max(targetLanguageSpinner.getSelectedItemPosition(), 0));
+ translatorOptions =
+ new TranslatorOptions.Builder()
+ .setSourceLanguage(sourceLanguage)
+ .setTargetLanguage(targetLanguage)
+ .build();
+ }
+
+ private void translate(String sourceString) {
+ final ProgressDialog dialog =
+ ProgressDialog.show(
+ this,
+ "Translate",
+ "Downloading Translate model",
+ /*indeterminate=*/ true,
+ /*cancelable=*/ false);
+
+ translatorsCache
+ .get(translatorOptions)
+ .downloadModelIfNeeded()
+ .addOnCompleteListener(ignored -> dialog.dismiss())
+ .addOnSuccessListener(
+ task ->
+ translatorsCache
+ .get(translatorOptions)
+ .translate(sourceString)
+ .addOnSuccessListener(targetString -> targetBox.setText(targetString))
+ .addOnFailureListener(this::onFailure))
+ .addOnFailureListener(this::onFailure);
+ }
+
+ private void onFailure(@NonNull Exception e) {
+ Log.e(TAG, e.getMessage(), e);
+ Toast.makeText(this, e.getMessage(), Toast.LENGTH_SHORT).show();
+ }
+
+ private void closeKeyboard() {
+ InputMethodManager imm = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE);
+ View view = getCurrentFocus();
+ if (view == null) {
+ view = new View(this);
+ }
+ imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
+ }
+}
diff --git a/android/translate/app/src/main/java/com/google/mlkit/samples/nl/translate/java/ModelManagementActivityJava.java b/android/translate/app/src/main/java/com/google/mlkit/samples/nl/translate/java/ModelManagementActivityJava.java
new file mode 100644
index 0000000000..c49e7670e0
--- /dev/null
+++ b/android/translate/app/src/main/java/com/google/mlkit/samples/nl/translate/java/ModelManagementActivityJava.java
@@ -0,0 +1,243 @@
+package com.google.mlkit.samples.nl.translate.java;
+
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.app.ProgressDialog;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Bundle;
+import androidx.annotation.Nullable;
+import androidx.appcompat.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AdapterView;
+import android.widget.AdapterView.OnItemClickListener;
+import android.widget.BaseAdapter;
+import android.widget.ListView;
+import android.widget.TextView;
+import android.widget.Toast;
+import androidx.annotation.StringRes;
+import androidx.core.content.ContextCompat;
+import com.google.android.material.snackbar.Snackbar;
+import com.google.common.base.Joiner;
+import com.google.common.collect.FluentIterable;
+import com.google.common.collect.ImmutableList;
+import com.google.mlkit.common.model.DownloadConditions;
+import com.google.mlkit.common.model.RemoteModelManager;
+import com.google.mlkit.nl.translate.TranslateLanguage;
+import com.google.mlkit.nl.translate.TranslateLanguage.Language;
+import com.google.mlkit.nl.translate.TranslateRemoteModel;
+import com.google.mlkit.samples.nl.translate.R;
+import com.google.mlkit.samples.nl.translate.kotlin.ModelManagementActivityKotlin;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+import java.util.Set;
+
+/** Activity for Model Management. */
+public class ModelManagementActivityJava extends AppCompatActivity {
+
+ private static final String TAG = "ModelManagementActivity";
+ private RemoteModelManager modelManager;
+
+ private ModelManagementAdapter listAdapter;
+ private ImmutableList languages;
+ @Nullable private Set availableModels;
+
+ private final List currentDownloads = new ArrayList<>();
+ @Nullable private Snackbar downloadsSnackbar;
+
+ public static Intent makeLaunchIntent(Context context) {
+ return new Intent(context, ModelManagementActivityKotlin.class);
+ }
+
+ @Override
+ public void onCreate(Bundle savedInstanceState) {
+ super.onCreate(savedInstanceState);
+ setContentView(R.layout.activity_model_management);
+
+ modelManager = RemoteModelManager.getInstance();
+ ImmutableList.Builder languagesBuilder = ImmutableList.builder();
+ for (String language : TranslateLanguage.getAllLanguages()) {
+ if ("ENGLISH".equals(language)) {
+ continue;
+ }
+ languagesBuilder.add(language);
+ }
+ languages = languagesBuilder.build();
+
+ ListView listView = findViewById(android.R.id.list);
+ listAdapter = new ModelManagementAdapter();
+ listView.setAdapter(listAdapter);
+ listView.setOnItemClickListener(listAdapter);
+ }
+
+ @Override
+ protected void onStart() {
+ super.onStart();
+ refreshAvailabilityData();
+ }
+
+ private void refreshAvailabilityData() {
+ modelManager
+ .getDownloadedModels(TranslateRemoteModel.class)
+ .addOnSuccessListener(
+ this,
+ result -> {
+ availableModels = result;
+ listAdapter.notifyDataSetChanged();
+ })
+ .addOnFailureListener(this, e -> showError(e, R.string.error_get_models));
+ }
+
+ private void downloadModel(TranslateRemoteModel model) {
+ currentDownloads.add(model.getLanguage());
+ updateDownloadsSnackbar();
+
+ modelManager
+ .download(model, new DownloadConditions.Builder().requireWifi().build())
+ .addOnFailureListener(this, e -> showError(e, R.string.error_download))
+ .addOnSuccessListener(this, aVoid -> refreshAvailabilityData())
+ .addOnCompleteListener(
+ this,
+ task -> {
+ currentDownloads.remove(model.getLanguage());
+ updateDownloadsSnackbar();
+ });
+ }
+
+ private void updateDownloadsSnackbar() {
+ if (downloadsSnackbar == null) {
+ downloadsSnackbar =
+ Snackbar.make(findViewById(android.R.id.content), "", Snackbar.LENGTH_INDEFINITE);
+ }
+
+ if (currentDownloads.isEmpty()) {
+ downloadsSnackbar.dismiss();
+ return;
+ }
+
+ downloadsSnackbar.setText(
+ getString(
+ R.string.download_progress,
+ FluentIterable.from(currentDownloads)
+ .transform(input -> new Locale(input).getDisplayName())
+ .join(Joiner.on(", "))));
+
+ downloadsSnackbar.show();
+ }
+
+ private void deleteModel(TranslateRemoteModel model) {
+ if (availableModels != null && !availableModels.contains(model)) {
+ showToast(R.string.model_not_downloaded);
+ return;
+ }
+
+ String name = new Locale(model.getLanguage()).getDisplayName();
+ final Dialog dialog = buildProgressDialog(getString(R.string.deletion_progress, name));
+ modelManager
+ .deleteDownloadedModel(model)
+ .addOnSuccessListener(aVoid -> showToast(R.string.deletion_successful))
+ .addOnFailureListener(e -> showError(e, R.string.error_delete))
+ .addOnCompleteListener(
+ task -> {
+ dialog.dismiss();
+ refreshAvailabilityData();
+ });
+ }
+
+ private class ModelManagementAdapter extends BaseAdapter implements OnItemClickListener {
+
+ @Override
+ public int getCount() {
+ return languages.size();
+ }
+
+ @Override
+ public String getItem(int position) {
+ return languages.get(position);
+ }
+
+ @Override
+ public long getItemId(int position) {
+ return position;
+ }
+
+ @Language
+ private String getLanguage(int position) {
+ return languages.get(position);
+ }
+
+ private TranslateRemoteModel getModel(int position) {
+ return new TranslateRemoteModel.Builder(getLanguage(position)).build();
+ }
+
+ private String getLanguageName(int position) {
+ return new Locale(getItem(position)).getDisplayLanguage();
+ }
+
+ @Override
+ public View getView(int position, View convertView, ViewGroup parent) {
+ if (convertView == null) {
+ convertView = getLayoutInflater().inflate(R.layout.item_model_management, parent, false);
+ }
+
+ TextView textView = convertView.findViewById(android.R.id.text1);
+ textView.setText(getLanguageName(position));
+
+ if (availableModels != null) {
+ textView.setCompoundDrawablesWithIntrinsicBounds(
+ null,
+ null,
+ ContextCompat.getDrawable(
+ ModelManagementActivityJava.this,
+ availableModels.contains(getModel(position))
+ ? R.drawable.ic_baseline_delete_24
+ : R.drawable.ic_file_download_white_24dp),
+ null);
+ }
+
+ return convertView;
+ }
+
+ @Override
+ public void onItemClick(AdapterView parent, View view, int position, long id) {
+ if (availableModels == null) {
+ showToast(R.string.error_get_models);
+ return;
+ }
+ if (availableModels.contains(getModel(position))) {
+ new AlertDialog.Builder(ModelManagementActivityJava.this)
+ .setMessage(getString(R.string.deletion_confirmation_prompt, getLanguageName(position)))
+ .setPositiveButton(R.string.yes, (dialog, which) -> deleteModel(getModel(position)))
+ .setNegativeButton(
+ R.string.no,
+ (dialog1, which) -> {
+ // Do nothing.
+ })
+ .show();
+ } else {
+ downloadModel(getModel(position));
+ }
+ }
+ }
+
+ private void showError(Exception exception, @StringRes int messageId) {
+ showToast(messageId);
+ Log.e(TAG, getString(messageId), exception);
+ }
+
+ private Dialog buildProgressDialog(String message) {
+ return ProgressDialog.show(
+ this,
+ getString(R.string.app_name),
+ message,
+ /*indeterminate=*/ true,
+ /*cancelable=*/ false);
+ }
+
+ private void showToast(@StringRes int messageId) {
+ Toast.makeText(this, messageId, Toast.LENGTH_LONG).show();
+ }
+}
diff --git a/android/translate/app/src/main/java/com/google/mlkit/samples/nl/translate/kotlin/MainActivityKotlin.kt b/android/translate/app/src/main/java/com/google/mlkit/samples/nl/translate/kotlin/MainActivityKotlin.kt
new file mode 100644
index 0000000000..1e3eb17549
--- /dev/null
+++ b/android/translate/app/src/main/java/com/google/mlkit/samples/nl/translate/kotlin/MainActivityKotlin.kt
@@ -0,0 +1,190 @@
+package com.google.mlkit.samples.nl.translate.kotlin
+
+import android.app.ProgressDialog
+import android.content.Context
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import android.util.Log
+import android.util.LruCache
+import android.view.KeyEvent
+import android.view.Menu
+import android.view.MenuItem
+import android.view.View
+import android.view.inputmethod.EditorInfo
+import android.view.inputmethod.InputMethodManager
+import android.widget.AdapterView
+import android.widget.AdapterView.OnItemSelectedListener
+import android.widget.ArrayAdapter
+import android.widget.Button
+import android.widget.EditText
+import android.widget.Spinner
+import android.widget.TextView
+import android.widget.Toast
+import com.google.mlkit.nl.translate.TranslateLanguage
+import com.google.mlkit.nl.translate.TranslateLanguage.Language
+import com.google.mlkit.nl.translate.Translation
+import com.google.mlkit.nl.translate.Translator
+import com.google.mlkit.nl.translate.TranslatorOptions
+import com.google.mlkit.samples.nl.translate.R
+import java.util.Locale
+
+class MainActivityKotlin : AppCompatActivity() {
+
+ companion object {
+ private val TAG = MainActivityKotlin::class.java.canonicalName
+ /**
+ * This specifies the number of translators instance we want to keep in our LRU cache. Each
+ * instance of the translator is built with different options based on the source language and the
+ * target language, and since we want to be able to manage the number of translator instances to
+ * keep around, an LRU cache is an easy way to achieve this.
+ */
+ private const val NUM_TRANSLATORS = 3
+ }
+
+ /** Current translatorOptions for the selected source and target languages */
+ private lateinit var translatorOptions: TranslatorOptions
+
+ private val translatorsCache: LruCache =
+ object :
+ LruCache(NUM_TRANSLATORS) {
+ public override fun create(options: TranslatorOptions): Translator {
+ return Translation.getClient(options)
+ }
+
+ public override fun entryRemoved(
+ evicted: Boolean,
+ key: TranslatorOptions,
+ oldValue: Translator,
+ newValue: Translator
+ ) {
+ oldValue.close()
+ }
+ }
+
+ /** Text box where the user types in their language */
+ private lateinit var sourceBox: EditText
+ /** Text box where translated text will appear */
+ private lateinit var targetBox: TextView
+
+ private val languageSet = TranslateLanguage.getAllLanguages()
+ private val languageLocales = languageSet.map { Locale(it) }.sortedBy { it.displayLanguage }
+ private val languages = languageLocales.map { it.language }
+ private val languageNames = languageLocales.map { it.displayLanguage }
+
+ private lateinit var sourceLanguageSpinner: Spinner
+ private lateinit var targetLanguageSpinner: Spinner
+
+ override fun onCreate(bundle: Bundle?) {
+ super.onCreate(bundle)
+ setContentView(R.layout.activity_main)
+
+ sourceBox = findViewById(R.id.sourceBox)
+ targetBox = findViewById(R.id.targetBox)
+ sourceLanguageSpinner = findViewById(R.id.sourceLanguageSpinner)
+ targetLanguageSpinner = findViewById(R.id.targetLanguageSpinner)
+
+ sourceBox.setOnEditorActionListener { v: TextView, actionId: Int, _: KeyEvent? ->
+ if (actionId == EditorInfo.IME_ACTION_SEND) {
+ closeKeyboard()
+ translate(v.text.toString())
+ true
+ } else {
+ false
+ }
+ }
+ findViewById