可以使用MediaRecorder录制音频和视频
准备三张图片，名字分别为：file_icon、record、stop。
在main.xml中：
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#3399ff"
android:orientation="vertical"
android:gravity="center_horizontal">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginTop="8dp">
<ImageButton
android:id="@+id/record"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/record"/>
<ImageButton
android:id="@+id/stop"
android:layout_marginLeft="8dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/stop"/>
</LinearLayout>
<TextView
android:id="@+id/info"
android:gravity="center_horizontal"
android:layout_marginTop="8dp"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="文字提示信息"
android:textColor="#ffffff"/>
<ListView
android:id="@+id/reclist"
android:layout_marginLeft="8dp"
android:layout_marginTop="8dp"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
新建布局文件recordfile.xml：
<TableLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#3399ff">
<TableRow
android:gravity="center_vertical">
<ImageView
android:id="@+id/icon"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:src="@drawable/file_icon"/>
<TextView
android:id="@+id/filename"
android:layout_marginLeft="8dp"
android:textColor="#ffffff"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</TableRow>
</TableLayout>
在MyMediaRecorderDemo.java中：
package com.li.mediarecorder;
import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.content.Intent;
import android.media.MediaRecorder;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
public class MyMediaRecorderDemo extends Activity {
private ImageButton record = null;
private ImageButton stop = null;
private TextView info = null;
private ListView reclist = null;
private SimpleAdapter recordSimpleAdapter = null;
private MediaRecorder mediaRecorder = null;
private boolean sdcardExists = false; // 判断sd卡是否存在
private File recordAudioSaveFileDir = null; // 保存所有音频文件的文件夹
private File recordAudioSaveFile = null; // 每次保存音频文件的名称
private String recordAudioSaveFileName = null; // 每次保存音频文件的名称
private String recDir = "liyewenrec"; // 保存的目录名称
private boolean isRecord = false ; // 录音的标志
private List<Map<String,Object>> recordFiles = null ;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.setContentView(R.layout.main);
this.record = (ImageButton) super.findViewById(R.id.record);
this.stop = (ImageButton) super.findViewById(R.id.stop);
this.info = (TextView) super.findViewById(R.id.info);
this.reclist = (ListView) super.findViewById(R.id.reclist);
// 如果存在则将状态给了sdcardExists属性
if ((this.sdcardExists = Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED))) { // 判断sd卡是否存在
this.recordAudioSaveFileDir = new File(Environment
.getExternalStorageDirectory().toString()
+ File.separator
+ MyMediaRecorderDemo.this.recDir + File.separator);
if (!this.recordAudioSaveFileDir.exists()) { // 文件夹不存在
this.recordAudioSaveFileDir.mkdirs(); // 创建文件夹
}
}
this.stop.setEnabled(false) ; // 按钮现在不可用
this.record.setOnClickListener(new RecordOnClickListenerImpl());
this.stop.setOnClickListener(new StopOnClickListenerImpl());
this.reclist.setOnItemClickListener(new OnItemClickListenerImpl()) ;
this.getRecordFiles() ;
}
private class RecordOnClickListenerImpl implements OnClickListener {
public void onClick(View v) {
if(MyMediaRecorderDemo.this.sdcardExists) { // 如果sd卡存在
MyMediaRecorderDemo.this.recordAudioSaveFileName = MyMediaRecorderDemo.this.recordAudioSaveFileDir
.toString()
+ File.separator
+ "MLDNRecord_"
+ System.currentTimeMillis() + ".3gp"; // 每次的录音文件名称都不一样
MyMediaRecorderDemo.this.recordAudioSaveFile =
new File(
MyMediaRecorderDemo.this.recordAudioSaveFileName);
MyMediaRecorderDemo.this.mediaRecorder = new MediaRecorder(); // 实例化对象
// 在进行录制之前必须配置若干个参数
MyMediaRecorderDemo.this.mediaRecorder
.setAudioSource(MediaRecorder.AudioSource.MIC); // 音频来源是MIC
MyMediaRecorderDemo.this.mediaRecorder
.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
MyMediaRecorderDemo.this.mediaRecorder
.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
MyMediaRecorderDemo.this.mediaRecorder
.setOutputFile(MyMediaRecorderDemo.this.recordAudioSaveFileName);
try { // 进入到就绪状态
MyMediaRecorderDemo.this.mediaRecorder.prepare() ;
} catch (Exception e) {
// Log.i("MyMediaRecorderDemo", e.toString()) ;
}
MyMediaRecorderDemo.this.mediaRecorder.start() ; // 开始录音
MyMediaRecorderDemo.this.info.setText("正在录音中...") ;
MyMediaRecorderDemo.this.stop.setEnabled(true); // 停止录音按钮可以使用了
MyMediaRecorderDemo.this.record.setEnabled(false) ;
MyMediaRecorderDemo.this.isRecord = true ; // 正在录音
}
}
}
private class StopOnClickListenerImpl implements OnClickListener {
public void onClick(View v) {
if(MyMediaRecorderDemo.this.isRecord) { // 正在录音
MyMediaRecorderDemo.this.mediaRecorder.stop() ; // 停止
MyMediaRecorderDemo.this.mediaRecorder.release() ; // 释放资源
MyMediaRecorderDemo.this.record.setEnabled(true) ;
MyMediaRecorderDemo.this.stop.setEnabled(false) ;
MyMediaRecorderDemo.this.info.setText("录音结束，文件路径为："
+ MyMediaRecorderDemo.this.recordAudioSaveFileName);
MyMediaRecorderDemo.this.getRecordFiles() ;
}
}
}
private void getRecordFiles(){ // 将一个文件夹之中的全部文件列出
this.recordFiles = new ArrayList<Map<String, Object>>();
if(this.sdcardExists) { // 有sd卡存在
File files [] = this.recordAudioSaveFileDir.listFiles() ; // 列出目录中的文件
for (int x = 0; x < files.length; x++) {
Map<String, Object> fileInfo = new HashMap<String, Object>();
fileInfo.put("filename", files[x].getName()) ;
this.recordFiles.add(fileInfo) ;
}
this.recordSimpleAdapter = new SimpleAdapter(this,
this.recordFiles, R.layout.recordfile,
new String[] { "filename" }, new int[] { R.id.filename });
this.reclist.setAdapter(this.recordSimpleAdapter) ;
}
}
private class OnItemClickListenerImpl implements OnItemClickListener {
public void onItemClick(AdapterView<?> parent, View view,
int position,
long id) {
if (MyMediaRecorderDemo.this.recordSimpleAdapter.getItem(position)
instanceof Map) {
Map<?, ?> map = (Map<?, ?>) MyMediaRecorderDemo.this.recordSimpleAdapter
.getItem(position);
Uri uri = Uri
.fromFile(new File(MyMediaRecorderDemo.this.recordAudioSaveFileDir
.toString()
+ File.separator
+ map.get("filename")));
Intent intent = new Intent(Intent.ACTION_VIEW) ;
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK) ;
intent.setDataAndType(uri, "audio/mp3") ;
MyMediaRecorderDemo.this.startActivity(intent) ;
}
}
}
}
修改AndroidManifest.xml：
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.li.mediarecorder"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="15" />
<uses-permission android:name="android.permission.RECORD_AUDIO"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MyMediaRecorderDemo"
android:label="@string/title_activity_my_media_recorder_demo" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>