这篇文章主要为大家详细介绍了 Android 实现自制和播放录音程序, 具有一定的参考价值,感兴趣的小伙伴们可以参考一下
Android 是一种基于 Linux 的自由及开放源代码的操作系统,主要使用于移动设备,如智能手机和平板电脑,由 Google 公司和开放手机联盟领导及开发。尚未有统一中文名称,中国大陆地区较多人使用 "安卓" 或 "安致"。
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 stub
- if (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 stub
- if (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 stub
- if (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"?>
- <LinearLayout
- xmlns: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">
- <LinearLayout
- android:id="@+id/LinearLayout01"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content">
- <ImageButton
- android:id="@+id/ImageButton01"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:src="@drawable/record">
- </ImageButton>
- <ImageButton
- android:id="@+id/ImageButton02"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:src="@drawable/stop">
- </ImageButton>
- <ImageButton
- android:id="@+id/ImageButton03"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:src="@drawable/play">
- </ImageButton>
- <ImageButton
- android:id="@+id/ImageButton04"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:src="@drawable/delete">
- </ImageButton>
- </LinearLayout>
- <TextView
- android:id="@+id/TextView01"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:textColor="@drawable/black">
- </TextView>
- <ListView
- android: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"?>
- <CheckedTextView
- xmlns: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"/>
来源: http://www.phperz.com/article/17/0319/297924.html