1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package android.app.stubs; 17 18 import android.app.Activity; 19 import android.content.Intent; 20 import android.os.AsyncTask; 21 import android.os.Bundle; 22 import android.util.Log; 23 24 /** 25 * {@link Activity} that allocates arrays of 256k until reaching 75% of the specified memory class. 26 */ 27 public class ActivityManagerMemoryClassTestActivity extends Activity { 28 29 private static final String TAG = "ActivityManagerMemoryClassTest"; 30 31 private static final double FREE_MEMORY_PERCENTAGE = 0.75; 32 33 private static final int ARRAY_BYTES_SIZE = 256 * 1024; 34 35 @Override 36 protected void onCreate(Bundle savedInstanceState) { 37 super.onCreate(savedInstanceState); 38 Intent intent = getIntent(); 39 int memoryClass = 40 intent.getIntExtra(ActivityManagerMemoryClassLaunchActivity.MEMORY_CLASS_EXTRA, -1); 41 new AllocateMemoryTask(memoryClass).execute(); 42 } 43 44 private class AllocateMemoryTask extends AsyncTask<Void, Void, Void> { 45 46 private final int mMemoryClass; 47 48 AllocateMemoryTask(int memoryClass) { 49 this.mMemoryClass = memoryClass; 50 } 51 52 @Override 53 protected Void doInBackground(Void... params) { 54 int targetMbs = (int) (mMemoryClass * FREE_MEMORY_PERCENTAGE); 55 int numArrays = targetMbs * 1024 * 1024 / ARRAY_BYTES_SIZE; 56 Log.i(TAG, "Memory class: " + mMemoryClass + "mb Target memory: " 57 + targetMbs + "mb Number of arrays: " + numArrays); 58 59 byte[][] arrays = new byte[numArrays][]; 60 for (int i = 0; i < arrays.length; i++) { 61 Log.i(TAG, "Allocating array " + i + " of " + arrays.length 62 + " (" + (i * ARRAY_BYTES_SIZE / 1024 / 1024) + "mb)"); 63 arrays[i] = new byte[ARRAY_BYTES_SIZE]; 64 } 65 return null; 66 } 67 68 @Override 69 protected void onPostExecute(Void result) { 70 super.onPostExecute(result); 71 setResult(RESULT_OK); 72 finish(); 73 } 74 } 75 } 76
