| /* |
| * Copyright (C) 2006 The Android Open Source Project |
| * |
| * 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. |
| */ |
| |
| package com.android.largeassettest; |
| |
| import android.app.Activity; |
| import android.content.Context; |
| import android.content.res.AssetManager; |
| import android.os.AsyncTask; |
| import android.os.Bundle; |
| import android.util.Log; |
| import android.view.View; |
| import android.widget.Button; |
| import android.widget.TextView; |
| |
| import java.io.InputStream; |
| import java.io.IOException; |
| |
| /** |
| * Skeleton to test large-asset handling. The asset in question is one million |
| * four-byte integers, in ascending numeric order. |
| */ |
| public class LargeAssetTest extends Activity { |
| Button mValidateButton; |
| TextView mResultText; |
| Validator mValidateThread; |
| |
| @Override |
| protected void onCreate(Bundle icicle) { |
| super.onCreate(icicle); |
| setContentView(R.layout.lat); |
| |
| mResultText = findViewById(R.id.result); |
| mValidateButton = findViewById(R.id.validate); |
| |
| mValidateButton.setOnClickListener(mClickListener); |
| } |
| |
| View.OnClickListener mClickListener = new View.OnClickListener() { |
| public void onClick(View v) { |
| mValidateButton.setEnabled(false); |
| mValidateThread = new Validator(); |
| mValidateThread.execute(LargeAssetTest.this.getAssets()); |
| } |
| }; |
| |
| /** |
| * Validation happens in a separate thread |
| */ |
| class Validator extends AsyncTask<AssetManager, Integer, Boolean> { |
| static final String TAG = "Validator"; |
| |
| @Override |
| protected Boolean doInBackground(AssetManager... params) { |
| AssetManager am = params[0]; |
| try { |
| InputStream is = am.open("million-ints", AssetManager.ACCESS_STREAMING); |
| byte[] buf = new byte[4]; |
| |
| for (int i = 0; i < 1000000; i++) { |
| int num = is.read(buf, 0, 4); |
| if (num != 4) { |
| Log.e(TAG, "Wanted 4 bytes but read " + num); |
| return false; |
| } |
| // the byte array is stored in the asset in little-endian order |
| int value = (buf[3] << 24) + ((buf[2] & 0xFF) << 16) |
| + ((buf[1] & 0xFF) << 8) + (buf[0] & 0xFF); |
| if (value != i) { |
| Log.e(TAG, "Mismatch: index " + i + " : value " + value); |
| return false; |
| } |
| } |
| |
| is.close(); |
| } catch (IOException e) { |
| Log.w(TAG, "Couldn't open asset", e); |
| return false; |
| } |
| Log.i(TAG, "Finished, reporting valid"); |
| return true; |
| } |
| |
| @Override |
| protected void onPostExecute(Boolean result) { |
| CharSequence text = (result) ? "Valid!" : "NOT VALID"; |
| mResultText.setText(text); |
| mValidateButton.setEnabled(true); |
| } |
| } |
| } |