请帮我解决此错误，我已经尝试了过去5天，但无法解决。
由于Android中的“要讲话的文本”没有暂停状态，因此我试图与Mediaplayer一起暂停和播放。
将文本字符串转换为.3gp格式并存储在sdcard中，直到这里它可以正常工作，但是我在mediaPlayer中遇到问题，它抛出以下错误
07-10 09:12:12.279: D/(13589): temper destination file/mnt/sdcard/tmpaudio.3gp
07-10 09:12:12.279: I/TextToSpeech.java - synthesizeToFile(13589): synthesizeToFile text of length 256
07-10 09:12:12.479: D/MediaPlayer(13589): setDataSource(tmpaudio.3gp)
07-10 09:12:12.489: E/MediaPlayer(13589): error (1, -2147483648)
07-10 09:12:12.489: W/System.err(13589): java.io.IOException: Prepare failed.: status=0x1
07-10 09:12:12.489: W/System.err(13589): at android.media.MediaPlayer.prepare(Native Method)
07-10 09:12:12.489: W/System.err(13589): at net.sf.andpdf.pdfviewer.PdfViewerActivity$GraphView$2.onClick(PdfViewerActivity.java:651)
07-10 09:12:12.489: W/System.err(13589): at android.view.View.performClick(View.java:2485)
07-10 09:12:12.489: W/System.err(13589): at android.view.View$PerformClick.run(View.java:9080)
07-10 09:12:12.489: W/System.err(13589): at android.os.Handler.handleCallback(Handler.java:587)
07-10 09:12:12.489: W/System.err(13589): at android.os.Handler.dispatchMessage(Handler.java:92)
07-10 09:12:12.489: W/System.err(13589): at android.os.Looper.loop(Looper.java:130)
07-10 09:12:12.489: W/System.err(13589): at android.app.ActivityThread.main(ActivityThread.java:3683)
07-10 09:12:12.489: W/System.err(13589): at java.lang.reflect.Method.invokeNative(Native Method)
07-10 09:12:12.489: W/System.err(13589): at java.lang.reflect.Method.invoke(Method.java:507)
07-10 09:12:12.489: W/System.err(13589): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:875)
07-10 09:12:12.489: W/System.err(13589): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:633)
07-10 09:12:12.489: W/System.err(13589): at dalvik.system.NativeStart.main(Native Method)
07-10 09:12:12.489: D/MediaPlayer(13589): start state 0
07-10 09:12:12.489: E/MediaPlayer(13589): start called in state 0
07-10 09:12:12.489: E/MediaPlayer(13589): error (-38, 0)
07-10 09:12:12.529: E/MediaPlayer(13589): Error (-38, 0)
码：
public void onClick(View v) {
mediaPlayer = new MediaPlayer();
if (mBtplay.getText().equals(getString(R.string.play_str))) {
PdfReader reader = null;
try {
reader = new PdfReader(pdffilename);
} catch (IOException e3) {
// TODO Auto-generated catch block
e3.printStackTrace();
}
int num = mPdfPage.getPageNumber();
String str = null;
try {
str = PdfTextExtractor.getTextFromPage(
reader, num);
} catch (IOException e2) {
// TODO Auto-generated catch block
e2.printStackTrace();
}
HashMap<String, String> myHashRender = new HashMap<String, String>();
myHashRender.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID, str);
File appTmpPath = Environment.getExternalStorageDirectory();
System.out.println(""
+ appTmpPath.getAbsolutePath());
appTmpPath.mkdirs();
String tempFilename = "tmpaudio.3gp";
final String tempDestFile = appTmpPath
.getAbsolutePath() + "/" + tempFilename;
Log.d("","temper destination file"+tempDestFile);
mTts.synthesizeToFile(str, myHashRender,
tempDestFile);
try {
mediaPlayer.setDataSource(tempDestFile);
mediaPlayer.prepare();
} catch (IllegalArgumentException 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();
}
try{
mediaPlayer.start();
}catch(Exception e){
System.out.println(""+e);
}
} else {
try {
Log.d("", "pause");
mBtplay.setText(getString(R.string.pause_str));
mediaPlayer.pause();
} catch (Exception pa) {
if (mediaPlayer != null) {
mediaPlayer.stop();
mediaPlayer.release();
}
}
}
}
最佳答案
我为您提供一些建议。按给定顺序一一尝试。
1）在播放之前，请检查您要播放的文件是否存在并且路径正确。
2）尝试使用其他音频格式，例如mp3。
3）使用文件描述符而不是文件路径，即
FileInputStream fis = new FileInputStream(pathoffiletobeplayed);
mediaPlayer.setDataSource(fis.getFD());
4）在
reset()之前呼叫setDataSource()。1是必须的。如果没有成功，请尝试2-3-4的所有组合。