-4
我只是想在android上開發一個mp3切割器應用程序。我只是做了一些事情來做到這一點。但它不起作用。我打包播放MP3，我在輸入流中存儲洞mp3，然後我使用輸出流來寫mp3。但它不工作...我只是試圖在android中實現mp3切割器...但它不工作
public class second extends Activity {
SeekBar bar;
String path;
Runnable r;
MediaPlayer mp = new MediaPlayer();
Handler handler = new Handler();
public static final String MEDIA_PATH = new String(Environment
.getExternalStorageDirectory().getPath() + "/Music/");
int length;
TextView time, time1, time2;
int i = 0;
int start, end;
Button cutMp3;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.test);
bar = (SeekBar) findViewById(R.id.seekBar1);
Bundle b = getIntent().getExtras();
path = b.getString("path");
time = (TextView) findViewById(R.id.time);
time1 = (TextView) findViewById(R.id.textView1);
time2 = (TextView) findViewById(R.id.textView2);
cutMp3 = (Button) findViewById(R.id.button1);
try {
mp.reset();
mp.setDataSource(MEDIA_PATH + path);
mp.prepare();
mp.start();
File mp3 = new File(MEDIA_PATH + path);
InputStream is = new FileInputStream(mp3);
final BufferedInputStream bis = new BufferedInputStream(is);
int numBytes = bis.available();
final byte[] buf = new byte[numBytes];
Toast.makeText(getApplicationContext(),
"num of bytes: " + numBytes, Toast.LENGTH_SHORT).show();
Toast.makeText(getApplicationContext(), "" + mp3.length(),
Toast.LENGTH_SHORT).show();
final File file = new File(MEDIA_PATH + path);
Toast.makeText(getApplicationContext(), "mjmj" + file.length(),
Toast.LENGTH_SHORT).show();
length = mp.getDuration();
bar.setMax(length);
bar.setClickable(true);
bar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar arg0) {
// TODO Auto-generated method stub
++i;
if (i == 1) {
time1.setText("" + mp.getCurrentPosition()/1000);
start = mp.getCurrentPosition();
}
if (i == 2) {
time2.setText("" + mp.getCurrentPosition()/1000);
end = mp.getCurrentPosition();
i = 0;
}
}
@Override
public void onStartTrackingTouch(SeekBar arg0) {
// TODO Auto-generated method stub
}
@Override
public void onProgressChanged(SeekBar arg0, int arg1,
boolean arg2) {
// TODO Auto-generated method stub
mp.seekTo(arg1);
}
});
r = new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
updateSeekbar();
}
};
r.run();
cutMp3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
try {
Log.d("chk", "read bytes");
bis.read(buf, start, end - start);
Log.d("chk", "end of read");
Log.d("chk", "toast start");
// Toast.makeText(getApplicationContext(),"" + bis.read(buf, start, end - start),
Toast.LENGTH_SHORT).show();
Log.d("chk", "toast end");
final byte[] buf1 = new byte[end - start];
ByteArrayBuffer baf = new ByteArrayBuffer(end - start);
try {
File file = new File("new.mp3");
if (file.createNewFile()) {
Toast.makeText(getApplicationContext(),
"file created", Toast.LENGTH_SHORT)
.show();
}
}
catch (Exception e) {
}
for (byte b : buf1) {
FileOutputStream fos = new FileOutputStream(file);
fos.write(buf1);
fos.close();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
// Toast.makeText(getApplicationContext(), ""+length,
// Toast.LENGTH_SHORT).show();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
protected void updateSeekbar() {
// TODO Auto-generated method stub
bar.setProgress(mp.getCurrentPosition());
handler.postDelayed(r, 1000);
time.setText("" + mp.getCurrentPosition()/1000);
}
}
在哪裏，究竟是「不工作」？附加logcat輸出。 – Srikanth
請定義「不工作」由什麼組成，並嘗試將代碼示例縮減到相關部分。 – marko