android 声音强度、分贝 大小检测 源码下载(as版)

【实例截图】

【核心代码】

package me.daei.soundmeter;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;

import java.io.File;

import me.daei.soundmeter.widget.SoundDiscView;

public class MainActivity extends AppCompatActivity {

    private boolean bListener = true;
    private boolean isThreadRun = true;
    private Thread thread;
    float volume = 10000;
    private SoundDiscView soundDiscView;

    private MyMediaRecorder mRecorder ;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mRecorder = new MyMediaRecorder();
    }

    private void startListenAudio() {
        thread = new Thread(new Runnable() {
            @Override
            public void run() {
                while (isThreadRun) {
                    try {
                        if(bListener) {
                            volume = mRecorder.getMaxAmplitude();  //获取声压值
                            if(volume > 0 && volume < 1000000) {
                                World.setDbCount(20 * (float)(Math.log10(volume)));  //将声压值转为分贝值
                                soundDiscView.refresh(); //刷新View [注]子线程
                            }
                        }
                        Thread.sleep(100);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                        bListener = false;
                    }
                }
            }
        });
        thread.start();
    }

    /**
     * 开始记录
     * @param fFile
     */
    public void startRecord(File fFile){
        try{
            mRecorder.setMyRecAudioFile(fFile);
            if (mRecorder.startRecorder()) {
                startListenAudio();
            }else{
                Toast.makeText(this, "启动录音失败", Toast.LENGTH_SHORT).show();
            }
        }catch(Exception e){
            Toast.makeText(this, "录音机已被占用或录音权限被禁止", Toast.LENGTH_SHORT).show();
            e.printStackTrace();
        }
    }


    @Override
    protected void onResume() {
        super.onResume();
        soundDiscView = (SoundDiscView) findViewById(R.id.soundDiscView);
        bListener = true;
        File file = FileUtil.createFile("temp.amr");
        if (file != null) {
            Log.v("file", "file ="   file.getAbsolutePath());
            startRecord(file);
        } else {
            Toast.makeText(getApplicationContext(), "创建文件失败", Toast.LENGTH_LONG).show();
        }
    }

    /**
     * 停止记录
     */
    @Override
    protected void onPause() {
        super.onPause();
        bListener = false;
        mRecorder.delete(); //停止记录并删除录音文件
        thread = null;
    }

    @Override
    protected void onDestroy() {
        if (thread != null) {
            isThreadRun = false;
            thread = null;
        }
        mRecorder.delete();
        super.onDestroy();
    }
}