音频录制 小实例

首先设置相关权限

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

<?xml version="1.0" encoding="utf-8"?><RelativeLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.moliying.a62_mediarecorder.MainActivity">    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="开始录制"        android:onClick="startClick"        android:id="@+id/button" android:layout_alignParentTop="true"        android:layout_alignParentStart="true" android:layout_alignParentEnd="true"/>    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="停止录制"        android:onClick="stopClick"        android:id="@+id/button2" android:layout_below="@+id/button"        android:layout_alignParentStart="true" android:layout_alignParentEnd="true"/></RelativeLayout>

package com.moliying.a62_mediarecorder;import android.media.MediaRecorder;import android.os.Environment;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import java.io.IOException;public class MainActivity extends AppCompatActivity {    private MediaRecorder mr;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mr = new MediaRecorder();    }    public void init(){        mr.reset();        mr.setAudioSource(MediaRecorder.AudioSource.MIC);//设置音源        mr.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);//设置输出的格式为mp3        mr.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);        String path = Environment.getExternalStoragePublicDirectory(                Environment.DIRECTORY_MUSIC)+"/"+System.currentTimeMillis()+".mp3";        mr.setOutputFile(path);        try {            mr.prepare();        } catch (IOException e) {            e.printStackTrace();        }    }    public void startClick(View view){        init();        mr.start();    }    public void stopClick(View view){        mr.stop();    }    @Override    protected void onDestroy() {        super.onDestroy();        if(mr!=null)            mr.release();    }}

第二个小实例  代码稍微有点差别 更严谨些

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.moliying.a60_media.RecorderActivity">    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="start"        android:id="@+id/button7_start"        android:layout_alignParentTop="true"        android:layout_alignParentStart="true" />    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="stop"        android:id="@+id/button8_stop"        android:layout_below="@+id/button7_start"        android:layout_alignParentStart="true" /></RelativeLayout>

package com.moliying.a60_media;import android.media.MediaRecorder;import android.os.Environment;import android.provider.Settings;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.Button;import java.io.IOException;public class RecorderActivity extends AppCompatActivity implements View.OnClickListener {    private MediaRecorder mr;    private Button button_start;    private Button button_stop;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_recorder);        button_start = (Button) findViewById(R.id.button7_start);        button_stop = (Button) findViewById(R.id.button8_stop);        button_start.setOnClickListener(this);        button_stop.setOnClickListener(this);        button_stop.setEnabled(false);        mr = new MediaRecorder();    }    private void init(){        mr.reset();        mr.setAudioSource(MediaRecorder.AudioSource.MIC);//设置音源        mr.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);//文件格式        mr.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);//文件编码        String path = Environment.getExternalStoragePublicDirectory(                Environment.DIRECTORY_MUSIC)+"/"+ System.currentTimeMillis()+".mp3";        mr.setOutputFile(path);        try {            mr.prepare();        } catch (IOException e) {            e.printStackTrace();        }    }    @Override    public void onClick(View v) {        switch (v.getId()){            case R.id.button7_start:                init();                mr.start();                button_stop.setEnabled(true);                button_start.setEnabled(false);                break;            case R.id.button8_stop:                mr.stop();                button_stop.setEnabled(false);                button_start.setEnabled(true);                break;        }    }    @Override    protected void onDestroy() {        super.onDestroy();        if(mr!=null)mr.release();    }}