我开发了一个录音机应用程序，现在我在同一应用程序中还有另一个要求。这是我要编辑的录音片段，因为我在google中搜索了很多，但是我只有一个参考资料**（Ringdroid）**。但这有点令人困惑。
这是我的 RecordingListActivity ：
private Toolbar toolbar;
private RecyclerView recyclerViewRecordings;
private ArrayList<Recording> recordingArraylist;
private RecordingAdapter recordingAdapter;
private TextView textViewNoRecordings;
String recordingUri;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_recording_list);
recordingArraylist = new ArrayList<Recording>();
initViews();
fetchRecordings();
}
private void fetchRecordings() {
File root = android.os.Environment.getExternalStorageDirectory();
String path = root.getAbsolutePath() + "/VoiceRecorder/Audios";
Log.d("Files", "Path: " + path);
File directory = new File(path);
File[] files = directory.listFiles();
Log.d("Files", "Size: "+ files.length);
if( files!=null ){
for (int i = 0; i < files.length; i++) {
Log.d("Files", "FileName:" + files[i].getName());
String fileName = files[i].getName();
recordingUri = root.getAbsolutePath() + "/VoiceRecorder/Audios/" + fileName;
Recording recording = new Recording(recordingUri,fileName,false);
recordingArraylist.add(recording);
}
textViewNoRecordings.setVisibility(View.GONE);
recyclerViewRecordings.setVisibility(View.VISIBLE);
setAdaptertoRecyclerView();
}else{
textViewNoRecordings.setVisibility(View.VISIBLE);
recyclerViewRecordings.setVisibility(View.GONE);
}
}
private void setAdaptertoRecyclerView() {
recordingAdapter = new RecordingAdapter(this,recordingArraylist);
recyclerViewRecordings.setAdapter(recordingAdapter);
}
private void initViews() {
/** setting up the toolbar **/
toolbar = (Toolbar) findViewById(R.id.toolbar);
toolbar.setTitle("Recording List");
toolbar.setTitleTextColor(getResources().getColor(android.R.color.black));
setSupportActionBar(toolbar);
/** enabling back button **/
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
/** setting up recyclerView **/
recyclerViewRecordings = (RecyclerView) findViewById(R.id.recyclerViewRecordings);
recyclerViewRecordings.setLayoutManager(new LinearLayoutManager(this,LinearLayoutManager.VERTICAL, false));
recyclerViewRecordings.setHasFixedSize(true);
textViewNoRecordings = (TextView) findViewById(R.id.textViewNoRecordings);
}
}
这是我的 RecordnigAdapter：
private Context context;
private ArrayList<Recording> recordingArrayList;
private MediaPlayer mPlayer;
private boolean isPlaying = false;
private int last_index = -1;
Recording recording;
int mLastPosition = 0;
public RecordingAdapter(Context context, ArrayList<Recording> recordingArrayList){
this.context = context;
this.recordingArrayList = recordingArrayList;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(context).inflate(R.layout.recording_item_layout, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
setUpData(holder,position);
}
private void setUpData(ViewHolder holder, int position) {
for (int i = 0; i < recordingArrayList.size(); i++) {
recording = recordingArrayList.get(position);
holder.textViewName.setText(recording.getFileName());
mLastPosition = position;
if (recording.isPlaying()) {
holder.imageViewPlay.setImageResource(R.mipmap.ic_pause);
TransitionManager.beginDelayedTransition((ViewGroup) holder.itemView);
holder.seekBar.setVisibility(View.VISIBLE);
holder.seekUpdation(holder);
} else {
holder.imageViewPlay.setImageResource(R.mipmap.ic_play);
TransitionManager.beginDelayedTransition((ViewGroup) holder.itemView);
holder.seekBar.setVisibility(View.GONE);
}
}
holder.manageSeekBar(holder);
}
@Override
public int getItemCount() {
return recordingArrayList.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
ImageView imageViewPlay;
SeekBar seekBar;
TextView textViewName;
Button share;
Button edit;
private String recordingUri;
private int lastProgress = 0;
private Handler mHandler = new Handler();
ViewHolder holder;
public ViewHolder(View itemView) {
super(itemView);
imageViewPlay = itemView.findViewById(R.id.imageViewPlay);
seekBar = itemView.findViewById(R.id.seekBar);
textViewName = itemView.findViewById(R.id.textViewRecordingname);
share = itemView.findViewById(R.id.share);
edit = itemView.findViewById(R.id.edit);
share.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
File root = android.os.Environment.getExternalStorageDirectory();
String path = root.getAbsolutePath() + "/VoiceRecorder/Audios";
File f = new File(path);
File[] files = f.listFiles();
Log.d("Files", "Size: " + files.length);
if (files != null) {
for (int i = 0; i < files.length; i++) {
Log.d("Files", "FileName:" + files[i].getName());
String fileName = files[i].getName();
recordingUri = root.getAbsolutePath() + "/VoiceRecorder/Audios/" + fileName;
Uri uri = Uri.parse(recordingUri);
Intent share = new Intent(Intent.ACTION_SEND);
share.putExtra(Intent.EXTRA_STREAM, uri);
share.setType("audio/*");
share.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
context.startActivity(Intent.createChooser(share, "Share audio File"));
}
}
}
});
edit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
File root = android.os.Environment.getExternalStorageDirectory();
String path = root.getAbsolutePath() + "/VoiceRecorder/Audios";
File f = new File(path);
File[] files = f.listFiles();
Log.d("Files", "Size: " + files.length);
if (files != null) {
for (int i = 0; i < files.length; i++) {
Log.d("Files", "FileName:" + files[i].getName());
String fileName = files[i].getName();
recordingUri = root.getAbsolutePath() + "/VoiceRecorder/Audios/" + fileName;
Uri uri = Uri.parse(recordingUri);
Intent edit = new Intent(context, AudioEditActivity.class);
edit.putExtra(Intent.EXTRA_STREAM, uri);
edit.setType("audio/*");
context.startActivity(edit);
}
}
}
});
imageViewPlay.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int position = getAdapterPosition();
Recording recording = recordingArrayList.get(position);
recordingUri = recording.getUri();
if( isPlaying ){
stopPlaying();
if( position == last_index ){
recording.setPlaying(false);
stopPlaying();
notifyItemChanged(position);
}else{
markAllPaused();
recording.setPlaying(true);
notifyItemChanged(position);
startPlaying(recording,position);
last_index = position;
}
}else {
if( recording.isPlaying() ){
recording.setPlaying(false);
stopPlaying();
Log.d("isPlayin","True");
}else {
startPlaying(recording,position);
recording.setPlaying(true);
seekBar.setMax(mPlayer.getDuration());
Log.d("isPlayin","False");
}
notifyItemChanged(position);
last_index = position;
}
}
});
}
public void manageSeekBar(ViewHolder holder){
holder.seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
if( mPlayer!=null && fromUser ){
mPlayer.seekTo(progress);
}
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
}
private void markAllPaused() {
for( int i=0; i < recordingArrayList.size(); i++ ){
recordingArrayList.get(i).setPlaying(false);
textViewName.setText(recording.getFileName());
}
notifyDataSetChanged();
}
Runnable runnable = new Runnable() {
@Override
public void run() {
seekUpdation(holder);
}
};
private void seekUpdation(ViewHolder holder) {
this.holder = holder;
if(mPlayer != null){
int mCurrentPosition = mPlayer.getCurrentPosition() ;
holder.seekBar.setMax(mPlayer.getDuration());
holder.seekBar.setProgress(mCurrentPosition);
lastProgress = mCurrentPosition;
}
mHandler.postDelayed(runnable, 100);
}
private void stopPlaying() {
try{
mPlayer.release();
}catch (Exception e){
e.printStackTrace();
}
mPlayer = null;
isPlaying = false;
}
private void startPlaying(final Recording audio, final int position) {
mPlayer = new MediaPlayer();
try {
mPlayer.setDataSource(recordingUri);
mPlayer.prepare();
mPlayer.start();
} catch (IOException e) {
Log.e("LOG_TAG", "prepare() failed");
}
//showing the pause button
seekBar.setMax(mPlayer.getDuration());
isPlaying = true;
mPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
audio.setPlaying(false);
notifyItemChanged(position);
}
});
}}}
以上课程与录制语音剪辑有关，现在我要编辑录制的语音剪辑，请帮助我解决此问题。