wav音频转码MP3

package cn.itcast.lame; import java.io.File; import android.app.Activity; import android.app.ProgressDialog; import android.os.Bundle; import android.view.View; import android.widget.EditText; import android.widget.Toast; public class LameActivity extends Activity { private EditText et_wav; private EditText et_mp3; private ProgressDialog pd; public native void convertmp3(String wav,String mp3); public native String getLameVersion(); public native void stop(); static{ System.loadLibrary("Hello"); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); et_wav = (EditText) this.findViewById(R.id.editText1); et_mp3 = (EditText) this.findViewById(R.id.editText2); pd = new ProgressDialog(this); } public void convert(View view){ final String mp3name = et_mp3.getText().toString().trim(); final String wavname = et_wav.getText().toString().trim(); File file = new File(wavname); int size = (int) file.length(); System.out.println("文件大小 "+ size); if("".equals(mp3name)||"".equals(wavname)){ Toast.makeText(this, "路径不能为空", 1).show(); return; } //convertmp3(wavname,mp3name); pd.setMessage("转换中...."); pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); pd.setMax(size); // 设置进度条的最大值 //pd.setCancelable(false); pd.show(); new Thread(){ @Override public void run() { convertmp3(wavname,mp3name); pd.dismiss(); } }.start(); } public void setConvertProgress(int progress){ pd.setProgress(progress); } public void getversion(View view){ String version = getLameVersion(); Toast.makeText(this, version, 0).show(); } }