Android 使用intent录音，为什么无法重新指定录制文件存放位置？

Question

1.使用intent存放录制的音频，录音文件只存放在默认文件夹下
2.重新制定位置存放音频文件

Answer 1

Android 使用intent录音，为什么无法重新指定录制文件存放位

EX07_11.java
Java代码 收藏代码

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;// 得到Sd卡path  
  private File myPlayFile;  
  private MediaRecorder mMediaRecorder01;  

  private ArrayList<String> recordFiles;  
  private ArrayAdapter<String> adapter;// 用于ListView的适配器  
  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);  
    //主要是4个控制按钮(录制,停止,播放,删除)  
    myButton1 = (ImageButton) findViewById(R.id.ImageButton01);  
    myButton2 = (ImageButton) findViewById(R.id.ImageButton02);  
    myButton3 = (ImageButton) findViewById(R.id.ImageButton03);  
    myButton4 = (ImageButton) findViewById(R.id.ImageButton04);  
    //列表出指定文件夹中所有amr格式音频文件  
    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路径作为录音的文件位置 */  
    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添加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;  
          }  
          // 创建录音频文件  
          //这种创建方式生成的文件名是随机的,所以我本人不是很习惯  
//          myRecAudioFile = File.createTempFile(strTempFile, ".amr",  
//              myRecAudioDir);  
           File sdcardDir = Environment.getExternalStorageDirectory();  
           String path = sdcardDir.getParent() + sdcardDir.getName();  
           String filePath = path + java.io.File.separator + "Demo";  
          //创建文件，使用自己指定文件名(这里我手动创建好了,我们也可以利用mkdirs的方法来创建)  
           myRecAudioFile = new File(filePath,"new.amr");  

          mMediaRecorder01 = new MediaRecorder();  

          /* 设置录音来源为麦克风 */  
          mMediaRecorder01  
              .setAudioSource(MediaRecorder.AudioSource.MIC);  

          mMediaRecorder01  
              .setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);  

          mMediaRecorder01  
              .setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);  
          //文件保存位置  
          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();  
          mMediaRecorder01.release();  

          mMediaRecorder01 = null;  

          /* 将录音频文件名给Adapter */  
          adapter.add(myRecAudioFile.getName());  
          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())  
        //{  
          /* 打开播放的程序 */  
         // openFile(myPlayFile);  
          System.out.println("_________________"+myRecAudioFile.getAbsolutePath());  
            //这里我们也可以加个判断:  
            //if(是否存在音频文件) myRecAudioFile.exists()  
          openFile(myRecAudioFile);  

        //}  
      }  
    });  
    /* 删除 */  
    myButton4.setOnClickListener(new ImageButton.OnClickListener()  
    {  
      @Override  
      public void onClick(View arg0)  
      {  
        // TODO Auto-generated method stub  
        if (myPlayFile != null)  
        {  
          /* 先将Adapter删除文件名 */  
          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)  
          {  
            /* 当有点击档名时将删除及播放按钮Enable */  
            myButton3.setEnabled(true);  
            myButton4.setEnabled(true);  

            System.out.println("_______________"  
                + myRecAudioDir.getAbsolutePath());  
//            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();  
  }  

  // 存储一个音频文件数组到list当中  
  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)  
          {  
            /* 只取.amr文件 */  
            String fileS = files[i].getName().substring(  
                files[i].getName().indexOf("."));  
            if (fileS.toLowerCase().equals(".amr"))  
              recordFiles.add(files[i].getName());  
          }  
        }  
      }  
    }  
  }  

  /* 打开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;  
  }  
}  

另外是界面文件
main.xml
Java代码 收藏代码

<?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>  

和my_simple_list_item.xml文件
Java代码 收藏代码

<?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" />   

这个CheckedTextView我还没有使用过，哪位知道的可以留言告诉我一些资料来源啥的
最后权限:
Java代码 收藏代码

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