录音

 闲着无聊把以前的写的东西整理下

public classMainActivity extendsAppCompatActivity implements View.OnClickListener {

privateButton bt_start,bt_stop;

privateListView lv;

privateFile mRecAudioPath;

List<String>list= newArrayList<String>();

privateFile mRecAudioFile;

privateMediaRecorder mMediaRecorder;

privateString strTempFile="录音_";

@Override

protected voidonCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

mRecAudioPath= getSDPathFile();

initView();

initData();

initListener();

}

private voidinitView(){

bt_start= (Button) findViewById(R.id.bt_start);

bt_stop= (Button) findViewById(R.id.bt_stop);

lv= (ListView) findViewById(R.id.lv);

bt_start.setEnabled(true);

bt_stop.setEnabled(false);

}

private voidinitData(){

list=getData();

ArrayAdapter adapter =new ArrayAdapter(this,android.R.layout.simple_list_item_1,list);

lv.setAdapter(adapter);

}

private voidinitListener(){

bt_stop.setOnClickListener(this);

bt_start.setOnClickListener(this);

lv.setOnItemClickListener(newAdapterView.OnItemClickListener() {

@Override

public voidonItemClick(AdapterView<?> parent, View view,int position, longid) {

File file =new File(mRecAudioPath.getAbsolutePath()+"/"+list.get(position));

play(file);

}

});

}

@Override

public voidonClick(View v) {

switch(v.getId()){

caseR.id.bt_start:

try{

//1实例化MediaRecorder对象

mMediaRecorder= newMediaRecorder();

//2设置麦克风

mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);

//3设置输出文件的格式：

mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);

//4设置音频文件的编码：

mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

//5设置输出文件路径

try{

mRecAudioFile= File.createTempFile(strTempFile,".amr",mRecAudioPath);

}catch (IOException e) {

e.printStackTrace();

}

mMediaRecorder.setOutputFile(mRecAudioFile.getAbsolutePath());

//6准备

mMediaRecorder.prepare();

//7开始

mMediaRecorder.start();

//按钮状态

bt_start.setEnabled(false);

bt_stop.setEnabled(true);

}catch (Exception e) {

e.printStackTrace();

}

break;

caseR.id.bt_stop:

if(mRecAudioFile!=null){

//停止录音

mMediaRecorder.stop();

//释放MediaRecorder

mMediaRecorder.release();

mMediaRecorder=null;

//按钮状态

bt_start.setEnabled(true);

bt_stop.setEnabled(false);

initData();

}

break;

default:break;

}

}

/**

* 1 得到SD卡的路径

*@return

*/

privateFile getSDPathFile(){

File file =null;

//检测是否SD卡是否存在

if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){

file =Environment.getExternalStorageDirectory();

}else{

Toast.makeText(MainActivity.this,"没有SD卡",Toast.LENGTH_LONG).show();

}

returnfile;

}

/**

* 2获取数据源 写一个Filter 接口继承 FilenameFilter

*@return

*/

//Filter接口

public class MusicFilter implementsFilenameFilter {

@Override

public booleanaccept(File dir, String filename) {

returnfilename.endsWith(".amr");

}

}

//数据源

publicList<String> getData(){

List<String> musiclist =new ArrayList<String>();

File file =mRecAudioPath;

if(file.listFiles(newMusicFilter())!=null){

if(file.listFiles(newMusicFilter()).length>0){

for(File file1:file.listFiles(newMusicFilter())){

musiclist.add(file1.getName());

}

}

}

returnmusiclist;

}

/**

* 3播放方法

*@param file

*/

private voidplay(File file){

Intent intent =new Intent(Intent.ACTION_VIEW);

Uri uri = Uri.fromFile(file);

intent.setDataAndType(uri,"audio/mp3");

startActivity(intent);

}

注 最后在 AndroidManifest中加入权限

<uses-permissionandroid:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

<uses-permissionandroid:name="android.permission.RECORD_AUDIO"/>