主程序
package com.mobao360.sunshine; import java.util.ArrayList; import Android.app.Activity; import android.app.AlertDialog; import android.content.Context; import android.content.DialogInterface; import android.os.Bundle; import android.util.Log; import android.view.SurfaceView; import android.view.View; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.Spinner; import android.widget.TextView; import android.widget.Toast; import android.widget.ZoomControls; import android.media.AudioFormat; import android.media.AudioRecord; import android.media.MediaRecorder; public class AudioMaker extends Activity { /** Called when the activity is first created. */ static int frequency = 8000;//分辨率 static final int channelConfiguration = AudioFormat.CHANNEL_CONFIGURATION_MONO; static final int audioEncodeing = AudioFormat.ENCODING_PCM_16BIT; static final int yMax = 50;//Y轴缩小比例最大值 static final int yMin = 1;//Y轴缩小比例最小值 int minBufferSize;//采集数据需要的缓冲区大小 AudioRecord audioRecord;//录音 AudioProcess audioProcess = new AudioProcess();//处理 Button btnStart,btnExit; //开始停止按钮 SurfaceView sfv; //绘图所用 ZoomControls zctlX,zctlY;//频谱图缩放 Spinner spinner;//下拉菜单 ArrayList<String> list=new ArrayList<String>(); ArrayAdapter<String>adapter;//下拉菜单适配器 TextView tView; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); initControl(); } @Override protected void onDestroy(){ super.onDestroy(); android.os.Process.killProcess(android.os.Process.myPid()); } //初始化控件信息 private void initControl() { //获取采样率 tView = (TextView)this.findViewById(R.id.tvSpinner); spinner = (Spinner)this.findViewById(R.id.spinnerFre); String []ls =getResources().getStringArray(R.array.action); for(int i=0;i<ls.length;i++){ list.add(ls[i]); } adapter=new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,list); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); spinner.setAdapter(adapter); spinner.setPrompt("请选择采样率"); spinner.setOnItemSelectedListener(new Spinner.OnItemSelectedListener(){ @SuppressWarnings("unchecked") public void onItemSelected(AdapterView arg0,View agr1,int arg2,long arg3){ frequency = Integer.parseInt(adapter.getItem(arg2)); tView.setText("您选择的是:"+adapter.getItem(arg2)+"HZ"); Log.i("sunshine",String.valueOf(minBufferSize)); arg0.setVisibility(View.VISIBLE); } @SuppressWarnings("unchecked") public void onNothingSelected(AdapterView arg0){ arg0.setVisibility(View.VISIBLE); } }); Context mContext = getApplicationContext(); //按键 btnStart = (Button)this.findViewById(R.id.btnStart); btnExit = (Button)this.findViewById(R.id.btnExit); //按键事件处理 btnStart.setOnClickListener(new ClickEvent()); btnExit.setOnClickListener(new ClickEvent()); //画笔和画板 sfv = (SurfaceView)this.findViewById(R.id.SurfaceView01); //初始化显示 audioProcess.initDraw(yMax/2, sfv.getHeight(),mContext,frequency); //画板缩放 zctlY = (ZoomControls)this.findViewById(R.id.zctlY); zctlY.setOnZoomInClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(audioProcess.rateY - 5>yMin){ audioProcess.rateY = audioProcess.rateY - 5; setTitle("Y轴缩小"+String.valueOf(audioProcess.rateY)+"倍"); }else{ audioProcess.rateY = 1; setTitle("原始尺寸"); } } }); zctlY.setOnZoomOutClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(audioProcess.rateY<yMax){ audioProcess.rateY = audioProcess.rateY + 5; setTitle("Y轴缩小"+String.valueOf(audioProcess.rateY)+"倍"); }else { setTitle("Y轴已经不能再缩小"); } } }); } /** * 按键事件处理 */ class ClickEvent implements View.OnClickListener{ @Override public void onClick(View v){ Button button = (Button)v; if(button == btnStart){ if(button.getText().toString().equals("Start")){ try { //录音 minBufferSize = AudioRecord.getMinBufferSize(frequency, channelConfiguration, audioEncodeing); //minBufferSize = 2 * minBufferSize; audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC,frequency, channelConfiguration, audioEncodeing, minBufferSize); audioProcess.baseLine = sfv.getHeight()-100; audioProcess.frequence = frequency; audioProcess.start(audioRecord, minBufferSize, sfv); Toast.makeText(AudioMaker.this, "当前设备支持您所选择的采样率:"+String.valueOf(frequency), Toast.LENGTH_SHORT).show(); btnStart.setText(R.string.btn_exit); spinner.setEnabled(false); } catch (Exception e) { // TODO: handle exception Toast.makeText(AudioMaker.this, "当前设备不支持你所选择的采样率"+String.valueOf(frequency)+",请重新选择", Toast.LENGTH_SHORT).show(); } }else if (button.getText().equals("Stop")) { spinner.setEnabled(true); btnStart.setText(R.string.btn_start); audioProcess.stop(sfv); } } else { new AlertDialog.Builder(AudioMaker.this) .setTitle("提示") .setMessage("确定退出?") .setPositiveButton("确定", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { setResult(RESULT_OK);//确定按钮事件 AudioMaker.this.finish(); finish(); } }) .setNegativeButton("取消", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { //取消按钮事件 } }) .show(); } } } }基于Android的实时音频频谱仪(3)
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