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首页 / 移动开发 / Android / Android实现自制和播放录音程序

首先,让我们先看下实现的截图:


当有录音文件存在时,会显示在下面的ListView当中。
下面给出实现的完整代码:
1.主程序代码

package irdc.ex07_11;import java.io.File;import java.io.IOException;import java.util.ArrayList;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.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.CheckedTextView;import android.widget.ImageButton;import android.widget.ListView;import android.widget.TextView;import android.widget.Toast;public class EX07_11 extends Activity{ private ImageButton myButton1; private ImageButton myButton2; private ImageButton myButton3; private ImageButton myButton4; private ListView myListView1; private String strTempFile = "ex07_11_"; private File myRecAudioFile; private File myRecAudioDir; private File myPlayFile; private MediaRecorder mMediaRecorder01; private ArrayList<String> recordFiles; private ArrayAdapter<String> adapter; private TextView myTextView1; private boolean sdCardExit; private boolean isStopRecord; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);myButton1 = (ImageButton) findViewById(R.id.ImageButton01);myButton2 = (ImageButton) findViewById(R.id.ImageButton02);myButton3 = (ImageButton) findViewById(R.id.ImageButton03);myButton4 = (ImageButton) findViewById(R.id.ImageButton04);myListView1 = (ListView) findViewById(R.id.ListView01);myTextView1 = (TextView) findViewById(R.id.TextView01);myButton2.setEnabled(false);myButton3.setEnabled(false);myButton4.setEnabled(false);/* 判断SD Card是否插入 */sdCardExit = Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);/* 取得SD Card路径做为录音的文件位置 */if (sdCardExit) myRecAudioDir = Environment.getExternalStorageDirectory();/* 取得SD Card目录里的所有.amr文件 */getRecordFiles();adapter = new ArrayAdapter<String>(this,R.layout.my_simple_list_item, recordFiles);/* 将ArrayAdapter存入ListView对象中 */myListView1.setAdapter(adapter);/* 录音 */myButton1.setOnClickListener(new ImageButton.OnClickListener(){ @Override public void onClick(View arg0) {try{ if (!sdCardExit) {Toast.makeText(EX07_11.this, "请插入SD Card",Toast.LENGTH_LONG).show();return; } /* 建立录音档 */ myRecAudioFile = File.createTempFile(strTempFile, ".amr", myRecAudioDir); mMediaRecorder01 = new MediaRecorder(); /* 设定录音来源为麦克风 */ mMediaRecorder01 .setAudioSource(MediaRecorder.AudioSource.MIC); mMediaRecorder01 .setOutputFormat(MediaRecorder.OutputFormat.DEFAULT); mMediaRecorder01 .setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT); mMediaRecorder01.setOutputFile(myRecAudioFile .getAbsolutePath()); mMediaRecorder01.prepare(); mMediaRecorder01.start(); myTextView1.setText("录音中"); myButton2.setEnabled(true); myButton3.setEnabled(false); myButton4.setEnabled(false); isStopRecord = false;} catch (IOException e){ // TODO Auto-generated catch block e.printStackTrace();} }});/* 停止 */myButton2.setOnClickListener(new ImageButton.OnClickListener(){ @Override public void onClick(View arg0) {// TODO Auto-generated method stubif (myRecAudioFile != null){ /* 停止录音 */ mMediaRecorder01.stop(); /* 将录音文件名给Adapter */ adapter.add(myRecAudioFile.getName()); mMediaRecorder01.release(); mMediaRecorder01 = null; myTextView1.setText("停止:" + myRecAudioFile.getName()); myButton2.setEnabled(false); isStopRecord = true;} }});/* 播放 */myButton3.setOnClickListener(new ImageButton.OnClickListener(){ @Override public void onClick(View arg0) {// TODO Auto-generated method stubif (myPlayFile != null && myPlayFile.exists()){ /* 开启播放的程序 */ openFile(myPlayFile);} }});/* ?除 */myButton4.setOnClickListener(new ImageButton.OnClickListener(){ @Override public void onClick(View arg0) {// TODO Auto-generated method stubif (myPlayFile != null){ /* 因将Adapter移除文件名 */ adapter.remove(myPlayFile.getName()); /* 删除文件 */ if (myPlayFile.exists())myPlayFile.delete(); myTextView1.setText("完成删除");} }});myListView1.setOnItemClickListener(new AdapterView.OnItemClickListener(){ @Override public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {/* 当有点选文件名时将删除及播放按钮Enable */myButton3.setEnabled(true);myButton4.setEnabled(true);myPlayFile = new File(myRecAudioDir.getAbsolutePath()+ File.separator+ ((CheckedTextView) arg1).getText());myTextView1.setText("你选的是:"+ ((CheckedTextView) arg1).getText()); }}); } @Override protected void onStop() {if (mMediaRecorder01 != null && !isStopRecord){ /* 停止录音 */ mMediaRecorder01.stop(); mMediaRecorder01.release(); mMediaRecorder01 = null;}super.onStop(); } private void getRecordFiles() {recordFiles = new ArrayList<String>();if (sdCardExit){ File files[] = myRecAudioDir.listFiles(); if (files != null) {for (int i = 0; i < files.length; i++){ if (files[i].getName().indexOf(".") >= 0) {/* 读取.amr文件 */String fileS = files[i].getName().substring(files[i].getName().indexOf("."));if (fileS.toLowerCase().equals(".amr")) recordFiles.add(files[i].getName()); }} }} } /* 开启播放录音文件的程序 */ private void openFile(File f) {Intent intent = new Intent();intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);intent.setAction(android.content.Intent.ACTION_VIEW);String type = getMIMEType(f);intent.setDataAndType(Uri.fromFile(f), type);startActivity(intent); } private String getMIMEType(File f) {String end = f.getName().substring(f.getName().lastIndexOf(".") + 1, f.getName().length()).toLowerCase();String type = "";if (end.equals("mp3") || end.equals("aac") || end.equals("aac")|| end.equals("amr") || end.equals("mpeg")|| end.equals("mp4")){ type = "audio";} else if (end.equals("jpg") || end.equals("gif")|| end.equals("png") || end.equals("jpeg")){ type = "image";} else{ type = "*";}type += "/*";return type; }}
2.总体布局文件代码

<?xml version="1.0" encoding="utf-8"?><LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"android:background="@drawable/white"> <LinearLayoutandroid:id="@+id/LinearLayout01"android:layout_width="wrap_content"android:layout_height="wrap_content"> <ImageButtonandroid:id="@+id/ImageButton01"android:layout_width="wrap_content"android:layout_height="wrap_content"android:src="@drawable/record"> </ImageButton> <ImageButtonandroid:id="@+id/ImageButton02"android:layout_width="wrap_content"android:layout_height="wrap_content"android:src="@drawable/stop"> </ImageButton> <ImageButtonandroid:id="@+id/ImageButton03"android:layout_width="wrap_content"android:layout_height="wrap_content"android:src="@drawable/play"> </ImageButton> <ImageButtonandroid:id="@+id/ImageButton04"android:layout_width="wrap_content"android:layout_height="wrap_content"android:src="@drawable/delete"> </ImageButton> </LinearLayout> <TextViewandroid:id="@+id/TextView01"android:layout_width="wrap_content"android:layout_height="wrap_content"android:textColor="@drawable/black"> </TextView> <ListViewandroid:id="@+id/ListView01"android:layout_width="wrap_content"android:layout_height="wrap_content"android:background="@drawable/black"> </ListView></LinearLayout>
3.ListView中的子View的布局

<?xml version="1.0" encoding="utf-8"?> <CheckedTextViewxmlns:android="http://schemas.android.com/apk/res/android"android:id="@+id/myCheckedTextView1"android:layout_width="fill_parent"android:layout_height="fill_parent"android:textColor="@drawable/white"/> 
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。