android使用mediarecord进行简单的录音

阳光穿透心脏的1/2处 2022-03-01 10:08 198阅读 0赞

## android使用mediarecord进行简单的录音 ##

布局文件

java文件

public class MainActivity extends AppCompatActivity {
    
        private Button btn_control;
        private boolean isStart = false;
        private MediaRecorder mr = null;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            btn_control = (Button) findViewById(R.id.btn_control);
            btn_control.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if(!isStart){
    
                            startRecord();
                            btn_control.setText("停止录制");
                            isStart = true;
    
    
    //                    startRecord();
    
                    }else{
                        stopRecord();
                        btn_control.setText("开始录制");
                        isStart = false;
                    }
                }
            });
        }
    
    
        //开始录制
        private void startRecord(){
            if(mr == null){
                File dir = new File(Environment.getExternalStorageDirectory(),"sounds");
                if(!dir.exists()){
                    dir.mkdirs();
                }
                File soundFile = new File(dir,System.currentTimeMillis()+".amr");
                if(!soundFile.exists()){
                    try {
                        soundFile.createNewFile();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
    
                }
                if (Build.VERSION.SDK_INT >= 23) {
                    int REQUEST_CODE_CONTACT = 101;
                    String[] permissions = {Manifest.permission.RECORD_AUDIO,
                            Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_EXTERNAL_STORAGE};
                    //验证是否许可权限
                    for (String str : permissions) {
                        if (this.checkSelfPermission(str) != PackageManager.PERMISSION_GRANTED) {
                            //申请权限
                            this.requestPermissions(permissions, REQUEST_CODE_CONTACT);
                            return;
                        }
                    }
                }
                mr = new MediaRecorder();
                mr.setAudioSource(MediaRecorder.AudioSource.MIC);  //音频输入源
                mr.setOutputFormat(MediaRecorder.OutputFormat.AMR_WB);   //设置输出格式
                mr.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_WB);   //设置编码格式
                mr.setOutputFile(soundFile.getAbsolutePath());
                try {
                    mr.prepare();
                    mr.start();  //开始录制
                } catch (IOException e) {
                    e.printStackTrace();
                }
    
            }
        }
    
        //停止录制，资源释放
        private void stopRecord(){
            if(mr != null){
                mr.stop();
                mr.release();
                mr = null;
            }
        }
    }

注意事项是需要动态申请麦克风和存储的权限