Android-implement self-made recording/playing recording programs

First, let's first look at the implementation: When a recording file exists, it will be displayed in the following ListView. The complete implementation code is as follows: 1. main program code [java] 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; im Port android. widget. checkedTextView; import android. widget. imageButton; import android. widget. listView; import android. widget. textView; import android. widget. toast; public class extends Activity {private ImageButton myButton1; private ImageButton myButton2; private ImageButton myButton3; private ImageButton myButton4; private ListView myListView1; private String strTempFile = "Your _"; Private File myRecAudioFile; private File extensions; 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) {sup Er. 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);/* determine whether SD Card is inserted */sdCardExit = Environment. getExternalStorageState (). equals (android. OS. environment. MEDIA_MOUNTED);/* obtain the SD Card path as the recording file location */if (sdCardExit) myRecAudioDir = Environment. getExternalStorageDirectory ();/* get all in the SD Card directory. amr file */getRecordFiles (); adapter = new ArrayAdapter <Stri Ng> (this, R. layout. my_simple_list_item, recordFiles);/* save ArrayAdapter to the ListView object */myListView1.setAdapter (adapter);/* recording */myButton1.setOnClickListener (new ImageButton. onClickListener () {@ Override public void onClick (View arg0) {try {if (! SdCardExit) {Toast. makeText (EX07_11.this, "insert SD Card", Toast. LENGTH_LONG ). show (); return;}/* Create a recording File */myRecAudioFile = File. createTempFile (strTempFile ,". amr ", myRecAudioDir); mMediaRecorder01 = new MediaRecorder ();/* set the recording source to a microphone */mMediaRecorder01. setAudioSource (MediaRecorder. audioSource. MIC); mMediaRecorder01. setOutputFormat (MediaRecorder. outputFormat. DEFAULT); mMediaRecorder01. setAudioEn Coder (MediaRecorder. audioEncoder. DEFAULT); mMediaRecorder01.setOutputFile (myRecAudioFile. getAbsolutePath (); encrypt (); mMediaRecorder01.start (); myTextView1.setText ("Recording"); myButton2.setEnabled (true); myButton3.setEnabled (false); myButton4.setEnabled (false ); isStopRecord = false;} catch (IOException e) {// TODO Auto-generated catch block e. printStackTrace () ;}});/* stop */m YButton2.setOnClickListener (new ImageButton. OnClickListener () {@ Override public void onClick (View arg0) {// TODO Auto-generated method stub if (myRecAudioFile! = Null) {/* stop recording */mMediaRecorder01.stop ();/* Send the recording file name to the Adapter */adapter. add (myRecAudioFile. getName (); mMediaRecorder01.release (); mMediaRecorder01 = null; myTextView1.setText ("Stop:" + myRecAudioFile. getName (); myButton2.setEnabled (false); isStopRecord = true ;}});/* play */myButton3.setOnClickListener (new ImageButton. onClickListener () {@ Override public void onClick (View arg0) {// TODO Auto -Generated method stub if (myPlayFile! = Null & myPlayFile. exists () {/* The Program for enabling playback */openFile (myPlayFile );}}});/*? Except */myButton4.setOnClickListener (new ImageButton. OnClickListener () {@ Override public void onClick (View arg0) {// TODO Auto-generated method stub if (myPlayFile! = Null) {/* because the Adapter is removed from the file name */adapter. remove (myPlayFile. getName ();/* delete file */if (myPlayFile. exists () myPlayFile. delete (); myTextView1.setText ("") ;}}); myListView1.setOnItemClickListener (new AdapterView. onItemClickListener () {@ Override public void onItemClick (AdapterView <?> Arg0, View arg1, int arg2, long arg3) {/* Delete the play button and Enable */myButton3.setEnabled (true) when selecting a file name; myButton4.setEnabled (true ); myPlayFile = new File (myRecAudioDir. getAbsolutePath () + File. separator + (CheckedTextView) arg1 ). getText (); myTextView1.setText ("You selected:" + (CheckedTextView) arg1 ). getText () ;}}) ;}@ Override protected void onStop () {if (mMediaRecorder01! = Null &&! IsStopRecord) {/* stop recording */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) {/* read. amr file */String fileS = files [I]. getName (). substring (files [I]. getName (). indexOf (". "); if (fileS. toLowerCase (). equals (". amr ") recordFiles. add (files [I]. getName () ;}}}}/* enable the program for playing the recording File */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. code of the overall layout file [html] <? 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 = "@ drawab Le/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/ListVi Ew01 "android: layout_width =" wrap_content "android: layout_height =" wrap_content "android: background =" @ drawable/black "> </ListView> </LinearLayout> 3. subview layout in ListView [html] <? 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"/>