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| 1 | +/* |
| 2 | + * Copyright (c) Meta Platforms, Inc. and affiliates. |
| 3 | + * All rights reserved. |
| 4 | + * |
| 5 | + * This source code is licensed under the BSD-style license found in the |
| 6 | + * LICENSE file in the root directory of this source tree. |
| 7 | + */ |
| 8 | + |
| 9 | +package org.pytorch.torchchat; |
| 10 | + |
| 11 | +import android.app.Activity; |
| 12 | +import android.app.ActivityManager; |
| 13 | +import android.app.AlertDialog; |
| 14 | +import android.content.Context; |
| 15 | +import android.os.Bundle; |
| 16 | +import android.widget.Button; |
| 17 | +import android.widget.EditText; |
| 18 | +import android.widget.ImageButton; |
| 19 | +import android.widget.ListView; |
| 20 | +import java.io.File; |
| 21 | +import org.pytorch.executorch.LlamaCallback; |
| 22 | +import org.pytorch.executorch.LlamaModule; |
| 23 | + |
| 24 | +public class MainActivity extends Activity implements Runnable, LlamaCallback { |
| 25 | + private EditText mEditTextMessage; |
| 26 | + private Button mSendButton; |
| 27 | + private ImageButton mModelButton; |
| 28 | + private ListView mMessagesView; |
| 29 | + private MessageAdapter mMessageAdapter; |
| 30 | + private LlamaModule mModule = null; |
| 31 | + private Message mResultMessage = null; |
| 32 | + |
| 33 | + private String mModelFilePath = ""; |
| 34 | + private String mTokenizerFilePath = ""; |
| 35 | + |
| 36 | + @Override |
| 37 | + public void onResult(String result) { |
| 38 | + mResultMessage.appendText(result); |
| 39 | + run(); |
| 40 | + } |
| 41 | + |
| 42 | + @Override |
| 43 | + public void onStats(float tps) { |
| 44 | + runOnUiThread( |
| 45 | + () -> { |
| 46 | + if (mResultMessage != null) { |
| 47 | + mResultMessage.setTokensPerSecond(tps); |
| 48 | + mMessageAdapter.notifyDataSetChanged(); |
| 49 | + } |
| 50 | + }); |
| 51 | + } |
| 52 | + |
| 53 | + private static String[] listLocalFile(String path, String suffix) { |
| 54 | + File directory = new File(path); |
| 55 | + if (directory.exists() && directory.isDirectory()) { |
| 56 | + File[] files = directory.listFiles((dir, name) -> name.toLowerCase().endsWith(suffix)); |
| 57 | + String[] result = new String[files.length]; |
| 58 | + for (int i = 0; i < files.length; i++) { |
| 59 | + if (files[i].isFile() && files[i].getName().endsWith(suffix)) { |
| 60 | + result[i] = files[i].getAbsolutePath(); |
| 61 | + } |
| 62 | + } |
| 63 | + return result; |
| 64 | + } |
| 65 | + return null; |
| 66 | + } |
| 67 | + |
| 68 | + private void setLocalModel(String modelPath, String tokenizerPath) { |
| 69 | + Message modelLoadingMessage = new Message("Loading model...", false); |
| 70 | + runOnUiThread( |
| 71 | + () -> { |
| 72 | + mSendButton.setEnabled(false); |
| 73 | + mMessageAdapter.add(modelLoadingMessage); |
| 74 | + mMessageAdapter.notifyDataSetChanged(); |
| 75 | + }); |
| 76 | + long runStartTime = System.currentTimeMillis(); |
| 77 | + mModule = new LlamaModule(modelPath, tokenizerPath, 0.8f); |
| 78 | + int loadResult = mModule.load(); |
| 79 | + if (loadResult != 0) { |
| 80 | + AlertDialog.Builder builder = new AlertDialog.Builder(this); |
| 81 | + builder.setTitle("Load failed: " + loadResult); |
| 82 | + runOnUiThread( |
| 83 | + () -> { |
| 84 | + AlertDialog alert = builder.create(); |
| 85 | + alert.show(); |
| 86 | + }); |
| 87 | + } |
| 88 | + |
| 89 | + long loadDuration = System.currentTimeMillis() - runStartTime; |
| 90 | + String modelInfo = |
| 91 | + "Model path: " |
| 92 | + + modelPath |
| 93 | + + "\nTokenizer path: " |
| 94 | + + tokenizerPath |
| 95 | + + "\nModel loaded time: " |
| 96 | + + loadDuration |
| 97 | + + " ms"; |
| 98 | + Message modelLoadedMessage = new Message(modelInfo, false); |
| 99 | + runOnUiThread( |
| 100 | + () -> { |
| 101 | + mSendButton.setEnabled(true); |
| 102 | + mMessageAdapter.remove(modelLoadingMessage); |
| 103 | + mMessageAdapter.add(modelLoadedMessage); |
| 104 | + mMessageAdapter.notifyDataSetChanged(); |
| 105 | + }); |
| 106 | + } |
| 107 | + |
| 108 | + private String memoryInfo() { |
| 109 | + final ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE); |
| 110 | + ActivityManager.MemoryInfo memInfo = new ActivityManager.MemoryInfo(); |
| 111 | + am.getMemoryInfo(memInfo); |
| 112 | + return "Total RAM: " |
| 113 | + + Math.floorDiv(memInfo.totalMem, 1000000) |
| 114 | + + " MB. Available RAM: " |
| 115 | + + Math.floorDiv(memInfo.availMem, 1000000) |
| 116 | + + " MB."; |
| 117 | + } |
| 118 | + |
| 119 | + private void modelDialog() { |
| 120 | + String[] pteFiles = listLocalFile("/data/local/tmp/llama/", ".pte"); |
| 121 | + String[] binFiles = listLocalFile("/data/local/tmp/llama/", ".bin"); |
| 122 | + String[] modelFiles = listLocalFile("/data/local/tmp/llama/", ".model"); |
| 123 | + String[] tokenizerFiles = new String[binFiles.length + modelFiles.length]; |
| 124 | + System.arraycopy(binFiles, 0, tokenizerFiles, 0, binFiles.length); |
| 125 | + System.arraycopy(modelFiles, 0, tokenizerFiles, binFiles.length, modelFiles.length); |
| 126 | + AlertDialog.Builder modelPathBuilder = new AlertDialog.Builder(this); |
| 127 | + modelPathBuilder.setTitle("Select model path"); |
| 128 | + AlertDialog.Builder tokenizerPathBuilder = new AlertDialog.Builder(this); |
| 129 | + tokenizerPathBuilder.setTitle("Select tokenizer path"); |
| 130 | + modelPathBuilder.setSingleChoiceItems( |
| 131 | + pteFiles, |
| 132 | + -1, |
| 133 | + (dialog, item) -> { |
| 134 | + mModelFilePath = pteFiles[item]; |
| 135 | + mEditTextMessage.setText(""); |
| 136 | + dialog.dismiss(); |
| 137 | + tokenizerPathBuilder.create().show(); |
| 138 | + }); |
| 139 | + |
| 140 | + tokenizerPathBuilder.setSingleChoiceItems( |
| 141 | + tokenizerFiles, |
| 142 | + -1, |
| 143 | + (dialog, item) -> { |
| 144 | + mTokenizerFilePath = tokenizerFiles[item]; |
| 145 | + Runnable runnable = |
| 146 | + new Runnable() { |
| 147 | + @Override |
| 148 | + public void run() { |
| 149 | + setLocalModel(mModelFilePath, mTokenizerFilePath); |
| 150 | + } |
| 151 | + }; |
| 152 | + new Thread(runnable).start(); |
| 153 | + dialog.dismiss(); |
| 154 | + }); |
| 155 | + |
| 156 | + modelPathBuilder.create().show(); |
| 157 | + } |
| 158 | + |
| 159 | + @Override |
| 160 | + protected void onCreate(Bundle savedInstanceState) { |
| 161 | + super.onCreate(savedInstanceState); |
| 162 | + setContentView(R.layout.activity_main); |
| 163 | + |
| 164 | + mEditTextMessage = findViewById(R.id.editTextMessage); |
| 165 | + mSendButton = findViewById(R.id.sendButton); |
| 166 | + mSendButton.setEnabled(false); |
| 167 | + mModelButton = findViewById(R.id.modelButton); |
| 168 | + mMessagesView = findViewById(R.id.messages_view); |
| 169 | + mMessageAdapter = new MessageAdapter(this, R.layout.sent_message); |
| 170 | + mMessagesView.setAdapter(mMessageAdapter); |
| 171 | + mModelButton.setOnClickListener( |
| 172 | + view -> { |
| 173 | + mModule.stop(); |
| 174 | + mMessageAdapter.clear(); |
| 175 | + mMessageAdapter.notifyDataSetChanged(); |
| 176 | + modelDialog(); |
| 177 | + }); |
| 178 | + |
| 179 | + onModelRunStopped(); |
| 180 | + modelDialog(); |
| 181 | + } |
| 182 | + |
| 183 | + private void onModelRunStarted() { |
| 184 | + mSendButton.setText("Stop"); |
| 185 | + mSendButton.setOnClickListener( |
| 186 | + view -> { |
| 187 | + mModule.stop(); |
| 188 | + }); |
| 189 | + } |
| 190 | + |
| 191 | + private void onModelRunStopped() { |
| 192 | + setTitle(memoryInfo()); |
| 193 | + mSendButton.setText("Generate"); |
| 194 | + mSendButton.setOnClickListener( |
| 195 | + view -> { |
| 196 | + String prompt = mEditTextMessage.getText().toString(); |
| 197 | + mMessageAdapter.add(new Message(prompt, true)); |
| 198 | + mMessageAdapter.notifyDataSetChanged(); |
| 199 | + mEditTextMessage.setText(""); |
| 200 | + mResultMessage = new Message("", false); |
| 201 | + mMessageAdapter.add(mResultMessage); |
| 202 | + Runnable runnable = |
| 203 | + new Runnable() { |
| 204 | + @Override |
| 205 | + public void run() { |
| 206 | + runOnUiThread( |
| 207 | + new Runnable() { |
| 208 | + @Override |
| 209 | + public void run() { |
| 210 | + onModelRunStarted(); |
| 211 | + } |
| 212 | + }); |
| 213 | + |
| 214 | + mModule.generate(prompt, MainActivity.this); |
| 215 | + |
| 216 | + runOnUiThread( |
| 217 | + new Runnable() { |
| 218 | + @Override |
| 219 | + public void run() { |
| 220 | + onModelRunStopped(); |
| 221 | + } |
| 222 | + }); |
| 223 | + } |
| 224 | + }; |
| 225 | + new Thread(runnable).start(); |
| 226 | + }); |
| 227 | + mMessageAdapter.notifyDataSetChanged(); |
| 228 | + } |
| 229 | + |
| 230 | + @Override |
| 231 | + public void run() { |
| 232 | + runOnUiThread( |
| 233 | + new Runnable() { |
| 234 | + @Override |
| 235 | + public void run() { |
| 236 | + mMessageAdapter.notifyDataSetChanged(); |
| 237 | + setTitle(memoryInfo()); |
| 238 | + } |
| 239 | + }); |
| 240 | + } |
| 241 | +} |
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