1 /* 2 * Copyright 2018 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 17 package com.google.oboe.samples.rhythmgame; 18 19 import android.content.Context; 20 import android.content.res.AssetManager; 21 import androidx.appcompat.app.AppCompatActivity; 22 23 import android.media.AudioManager; 24 import android.os.Build; 25 import android.os.Bundle; 26 import android.view.WindowManager; 27 28 public class MainActivity extends AppCompatActivity { 29 30 // Used to load the 'native-lib' library on application startup. 31 static { 32 System.loadLibrary("native-lib"); 33 } 34 35 @Override onCreate(Bundle savedInstanceState)36 protected void onCreate(Bundle savedInstanceState) { 37 super.onCreate(savedInstanceState); 38 setContentView(R.layout.activity_main); 39 getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); 40 setDefaultStreamValues(this); 41 } 42 onResume()43 protected void onResume(){ 44 super.onResume(); 45 native_onStart(getAssets()); 46 } 47 onPause()48 protected void onPause(){ 49 super.onPause(); 50 native_onStop(); 51 } 52 setDefaultStreamValues(Context context)53 static void setDefaultStreamValues(Context context) { 54 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1){ 55 AudioManager myAudioMgr = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE); 56 String sampleRateStr = myAudioMgr.getProperty(AudioManager.PROPERTY_OUTPUT_SAMPLE_RATE); 57 int defaultSampleRate = Integer.parseInt(sampleRateStr); 58 String framesPerBurstStr = myAudioMgr.getProperty(AudioManager.PROPERTY_OUTPUT_FRAMES_PER_BUFFER); 59 int defaultFramesPerBurst = Integer.parseInt(framesPerBurstStr); 60 61 native_setDefaultStreamValues(defaultSampleRate, defaultFramesPerBurst); 62 } 63 } 64 native_onStart(AssetManager assetManager)65 private native void native_onStart(AssetManager assetManager); native_onStop()66 private native void native_onStop(); native_setDefaultStreamValues(int defaultSampleRate, int defaultFramesPerBurst)67 private static native void native_setDefaultStreamValues(int defaultSampleRate, 68 int defaultFramesPerBurst); 69 } 70