我正在尝试开发一个应用程序，它从我的服务器下载我的内容并在本地播放，所以当我点击图标时，初始屏幕出现（这是初始活动执行正常，如果一旦它进入它显示错误的第二个活动是
不幸的是app停止了
这是我的日志猫
01-13 00:25:41.070: E/AndroidRuntime(955): FATAL EXCEPTION: main
01-13 00:25:41.070: E/AndroidRuntime(955): Process: com.tmp.timbremediaplayer, PID: 955
01-13 00:25:41.070: E/AndroidRuntime(955): java.lang.RuntimeException: Unable to resume activity {com.tmp.timbremediaplayer/com.tmp.timbremediaplayer.MusicPlayerActivity}: android.util.SuperNotCalledException: Activity {com.tmp.timbremediaplayer/com.tmp.timbremediaplayer.MusicPlayerActivity} did not call through to super.onResume()
01-13 00:25:41.070: E/AndroidRuntime(955): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2788)
01-13 00:25:41.070: E/AndroidRuntime(955): at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2817)
01-13 00:25:41.070: E/AndroidRuntime(955): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2250)
01-13 00:25:41.070: E/AndroidRuntime(955): at android.app.ActivityThread.access$800(ActivityThread.java:135)
01-13 00:25:41.070: E/AndroidRuntime(955): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
01-13 00:25:41.070: E/AndroidRuntime(955): at android.os.Handler.dispatchMessage(Handler.java:102)
01-13 00:25:41.070: E/AndroidRuntime(955): at android.os.Looper.loop(Looper.java:136)
01-13 00:25:41.070: E/AndroidRuntime(955): at android.app.ActivityThread.main(ActivityThread.java:5017)
01-13 00:25:41.070: E/AndroidRuntime(955): at java.lang.reflect.Method.invokeNative(Native Method)
01-13 00:25:41.070: E/AndroidRuntime(955): at java.lang.reflect.Method.invoke(Method.java:515)
01-13 00:25:41.070: E/AndroidRuntime(955): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
01-13 00:25:41.070: E/AndroidRuntime(955): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
01-13 00:25:41.070: E/AndroidRuntime(955): at dalvik.system.NativeStart.main(Native Method)
01-13 00:25:41.070: E/AndroidRuntime(955): Caused by: android.util.SuperNotCalledException: Activity {com.tmp.timbremediaplayer/com.tmp.timbremediaplayer.MusicPlayerActivity} did not call through to super.onResume()
01-13 00:25:41.070: E/AndroidRuntime(955): at android.app.Activity.performResume(Activity.java:5312)
01-13 00:25:41.070: E/AndroidRuntime(955): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2778)
01-13 00:25:41.070: E/AndroidRuntime(955): ... 12 more
这是初始活动
public class SyncActivity extends Activity {
private Button btnProgressBar;
private ProgressDialog prgDialog;
// Progress Dialog type (0 - for Horizontal progress bar)
public static final int progress_bar_type = 0;
// Music resource URL
private static String file_url = "https://docs.google.com/uc?export=download&id=0B_TtB7EjzcYCUXVuRTFmRzNkczg";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Show Download Music Button
btnProgressBar = (Button) findViewById(R.id.btnProgressBar);
// Download Music Button click listener
btnProgressBar.setOnClickListener(new View.OnClickListener() {
// When Download Music Button is clicked
public void onClick(View v)
{
// Disable the button to avoid playing of song multiple times
btnProgressBar.setEnabled(false);
// Downloaded Music File path in SD Card
File sdcard = Environment.getExternalStorageDirectory();
File dir = new File(sdcard.getAbsolutePath()+"/timbre media");
dir.mkdirs();
File file = new File(Environment.getExternalStorageDirectory().getPath()+"/timbre media/song.mp3");
// Check if the Music file already exists
if (file.exists())
{
Toast.makeText(getApplicationContext(), "File already exist under SD card, playing Music", Toast.LENGTH_SHORT).show();
/* Play Music
* Include the player activity
* and playing starts from here if the music file
* already exist
*/
Intent i = new Intent(getApplicationContext(), MusicPlayerActivity.class);
startActivityForResult(i, 100);
// If the Music File doesn't exist in SD card (Not yet downloaded)
}
else
{
Toast.makeText(getApplicationContext(), "File doesn't exist under SD Card, downloading Mp3", Toast.LENGTH_SHORT).show();
// Trigger Async Task (onPreExecute method)
new DownloadMusic().execute(file_url);
}
}
});
}
// Show Dialog Box with Progress bar
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case progress_bar_type:
prgDialog = new ProgressDialog(this);
prgDialog.setMessage("Downloading Mp3 file. Please wait...");
prgDialog.setIndeterminate(false);
prgDialog.setMax(100);
prgDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
prgDialog.setCancelable(false);
prgDialog.show();
return prgDialog;
default:
return null;
}
}
// Async Task Class
class DownloadMusic extends AsyncTask<String, String, String>
{
// Show Progress bar before downloading Music
@SuppressWarnings("deprecation")
@Override
protected void onPreExecute() {
super.onPreExecute();
// Shows Progress Bar Dialog and then call doInBackground method
showDialog(progress_bar_type);
}
// Download Music File from Internet
@Override
protected String doInBackground(String... f_url) {
int count;
try {
URL url = new URL(f_url[0]);
URLConnection conection = url.openConnection();
conection.connect();
// Get Music file length
int lenghtOfFile = conection.getContentLength();
// input stream to read file - with 8k buffer
InputStream input = new BufferedInputStream(url.openStream(),10*1024);
// Output stream to write file in SD card
OutputStream output = new FileOutputStream(Environment.getExternalStorageDirectory().getPath()+"/timbre media/song.mp3");
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
// Publish the progress which triggers onProgressUpdate method
publishProgress("" + (int) ((total * 100) / lenghtOfFile));
// Write data to file
output.write(data, 0, count);
}
// Flush output
output.flush();
// Close streams
output.close();
input.close();
} catch (Exception e) {
Log.e("Error: ", e.getMessage());
}
return null;
}
// While Downloading Music File
protected void onProgressUpdate(String... progress) {
// Set progress percentage
prgDialog.setProgress(Integer.parseInt(progress[0]));
}
// Once Music File is downloaded
@SuppressWarnings("deprecation")
@Override
protected void onPostExecute(String file_url) {
// Dismiss the dialog after the Music file was downloaded
dismissDialog(progress_bar_type);
Toast.makeText(getApplicationContext(), "Download complete, playing Music", Toast.LENGTH_LONG).show();
/*
* Play the music
*/
Intent i = new Intent(getApplicationContext(), MusicPlayerActivity.class);
startActivityForResult(i, 100);
}
}
}
这是第二项活动
public class MusicPlayerActivity extends Activity implements OnCompletionListener, SeekBar.OnSeekBarChangeListener {
private ImageButton btnPlay;
private ImageButton btnForward;
private ImageButton btnBackward;
private ImageButton btnNext;
private ImageButton btnPrevious;
private ImageButton btnPlaylist;
private ImageButton btnRepeat;
private ImageButton btnShuffle;
private ImageButton btnClose;
private SeekBar songProgressBar;
private TextView songTitleLabel;
private TextView songCurrentDurationLabel;
private TextView songTotalDurationLabel;
// Media Player
public MediaPlayer mp;
// Handler to update UI timer, progress bar etc,.
private Handler mHandler = new Handler();;
private SongsManager songManager;
private Utilities utils;
public int length=0;
private int seekForwardTime = 5000; // 5000 milliseconds
private int seekBackwardTime = 5000; // 5000 milliseconds
private int currentSongIndex = 0;
private boolean isShuffle = false;
private boolean isRepeat = false;
private ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>();
String TAG = "phoneCallListener";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.player);
// All player buttons
btnPlay = (ImageButton) findViewById(R.id.btnPlay);
btnForward = (ImageButton) findViewById(R.id.btnForward);
btnBackward = (ImageButton) findViewById(R.id.btnBackward);
btnNext = (ImageButton) findViewById(R.id.btnNext);
btnPrevious = (ImageButton) findViewById(R.id.btnPrevious);
btnPlaylist = (ImageButton) findViewById(R.id.btnPlaylist);
btnRepeat = (ImageButton) findViewById(R.id.btnRepeat);
btnShuffle = (ImageButton) findViewById(R.id.btnShuffle);
btnClose = (ImageButton) findViewById(R.id.btnClose);
songProgressBar = (SeekBar) findViewById(R.id.songProgressBar);
songTitleLabel = (TextView) findViewById(R.id.songTitle);
songCurrentDurationLabel = (TextView) findViewById(R.id.songCurrentDurationLabel);
songTotalDurationLabel = (TextView) findViewById(R.id.songTotalDurationLabel);
// Mediaplayer
mp = new MediaPlayer();
songManager = new SongsManager();
utils = new Utilities();
// Listeners
songProgressBar.setOnSeekBarChangeListener(this); // Important
mp.setOnCompletionListener(this); // Important
// Getting all songs list
songsList = songManager.getPlayList();
// By default play first song
playSong(0);
/**
* Play button click event
* plays a song and changes button to pause image
* pauses a song and changes button to play image
* */
btnPlay.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// check for already playing
if(mp.isPlaying()){
if(mp!=null){
mp.pause();
length = mp.getCurrentPosition();
// Changing button image to play button
btnPlay.setImageResource(R.drawable.btn_play);
}
}else if(mp!=null)
{
// Resume song
mp.start();
// Changing button image to pause button
btnPlay.setImageResource(R.drawable.btn_pause);
}
else
{
onResume();
}
}
});
/**
* Forward button click event
* Forwards song specified seconds
* */
btnForward.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// get current song position
int currentPosition = mp.getCurrentPosition();
// check if seekForward time is lesser than song duration
if(currentPosition + seekForwardTime <= mp.getDuration()){
// forward song
mp.seekTo(currentPosition + seekForwardTime);
}else{
// forward to end position
mp.seekTo(mp.getDuration());
}
}
});
/*
* Close image button
*/
btnClose.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
openAlert(v);
}
});
/*private void openAlert(View view) {
}
*/
/**
* Backward button click event
* Backward song to specified seconds
* */
btnBackward.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// get current song position
int currentPosition = mp.getCurrentPosition();
// check if seekBackward time is greater than 0 sec
if(currentPosition - seekBackwardTime >= 0){
// forward song
mp.seekTo(currentPosition - seekBackwardTime);
}else{
// backward to starting position
mp.seekTo(0);
}
}
});
/**
* Next button click event
* Plays next song by taking currentSongIndex + 1
* */
btnNext.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// check if next song is there or not
if(currentSongIndex < (songsList.size() - 1)){
playSong(currentSongIndex + 1);
currentSongIndex = currentSongIndex + 1;
}else{
// play first song
playSong(0);
currentSongIndex = 0;
}
}
});
/**
* Back button click event
* Plays previous song by currentSongIndex - 1
* */
btnPrevious.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
if(currentSongIndex > 0){
playSong(currentSongIndex - 1);
currentSongIndex = currentSongIndex - 1;
}else{
// play last song
playSong(songsList.size() - 1);
currentSongIndex = songsList.size() - 1;
}
}
});
/**
* Button Click event for Repeat button
* Enables repeat flag to true
* */
btnRepeat.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
if(isRepeat){
isRepeat = false;
Toast.makeText(getApplicationContext(), "Repeat is OFF", Toast.LENGTH_SHORT).show();
btnRepeat.setImageResource(R.drawable.btn_repeat);
}else{
// make repeat to true
isRepeat = true;
Toast.makeText(getApplicationContext(), "Repeat is ON", Toast.LENGTH_SHORT).show();
// make shuffle to false
isShuffle = false;
btnRepeat.setImageResource(R.drawable.btn_repeat_focused);
btnShuffle.setImageResource(R.drawable.btn_shuffle);
}
}
});
/**
* Button Click event for Shuffle button
* Enables shuffle flag to true
* */
btnShuffle.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
if(isShuffle){
isShuffle = false;
Toast.makeText(getApplicationContext(), "Shuffle is OFF", Toast.LENGTH_SHORT).show();
btnShuffle.setImageResource(R.drawable.btn_shuffle);
}else{
// make repeat to true
isShuffle= true;
Toast.makeText(getApplicationContext(), "Shuffle is ON", Toast.LENGTH_SHORT).show();
// make shuffle to false
isRepeat = false;
btnShuffle.setImageResource(R.drawable.btn_shuffle_focused);
btnRepeat.setImageResource(R.drawable.btn_repeat);
}
}
});
/**
* Button Click event for Play list click event
* Launches list activity which displays list of songs
* */
btnPlaylist.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
Intent i = new Intent(getApplicationContext(), PlayListActivity.class);
startActivityForResult(i, 100);
}
});
}
public void onCallStateChanged(int state, String incoming_Number)
{
Intent i = new Intent(getApplicationContext(),Call_Exception.class);
startActivityForResult(i, 100);
}
protected void onResume(){
if(mp.isPlaying()== false)
{
if(mp!=null)
{
mp.seekTo(length);
super.onResume();
mp.start();
btnPlay.setImageResource(R.drawable.btn_pause);
}
}
}
protected void openAlert(View v) {
// TODO Auto-generated method stub
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(MusicPlayerActivity.this);
alertDialogBuilder.setTitle(this.getTitle()+ " decision");
alertDialogBuilder.setMessage("Are you sure?");
// set negative button: No message
alertDialogBuilder.setNegativeButton("No",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
// cancel the alert box and put a Toast to the user
dialog.cancel();
Toast.makeText(getApplicationContext(), "You choose a negative answer",
Toast.LENGTH_SHORT).show();
}
});
// set neutral button: Exit the app message
alertDialogBuilder.setNeutralButton("Exit the app",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
// exit the app and go to the HOME
MusicPlayerActivity.this.finish();
}
});
AlertDialog alertDialog = alertDialogBuilder.create();
// show alert
alertDialog.show();
}
/**
* Receiving song index from playlist view
* and play the song
* */
@Override
protected void onActivityResult(int requestCode,
int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(resultCode == 100){
currentSongIndex = data.getExtras().getInt("songIndex");
// play selected song
playSong(currentSongIndex);
}
}
/**
* Function to play a song
* @param songIndex - index of song
* */
public void playSong(int songIndex){
// Play song
try {
mp.reset();
mp.setDataSource(songsList.get(songIndex).get("songPath"));
mp.prepare();
mp.start();
// Displaying Song title
String songTitle = songsList.get(songIndex).get("songTitle");
songTitleLabel.setText(songTitle);
// Changing Button Image to pause image
btnPlay.setImageResource(R.drawable.btn_pause);
// set Progress bar values
songProgressBar.setProgress(0);
songProgressBar.setMax(100);
// Updating progress bar
updateProgressBar();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* Update timer on seekbar
* */
public void updateProgressBar() {
mHandler.postDelayed(mUpdateTimeTask, 100);
}
/**
* Background Runnable thread
* */
private Runnable mUpdateTimeTask = new Runnable() {
public void run() {
long totalDuration = mp.getDuration();
long currentDuration = mp.getCurrentPosition();
// Displaying Total Duration time
songTotalDurationLabel.setText(""+utils.milliSecondsToTimer(totalDuration));
// Displaying time completed playing
songCurrentDurationLabel.setText(""+utils.milliSecondsToTimer(currentDuration));
// Updating progress bar
int progress = (int)(utils.getProgressPercentage(currentDuration, totalDuration));
//Log.d("Progress", ""+progress);
songProgressBar.setProgress(progress);
// Running this thread after 100 milliseconds
mHandler.postDelayed(this, 100);
}
};
/**
*
* */
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromTouch) {
}
/**
* When user starts moving the progress handler
* */
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// remove message Handler from updating progress bar
//mHandler.removeCallbacks(mUpdateTimeTask);
}
/**
* When user stops moving the progress hanlder
* */
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
//mHandler.removeCallbacks(mUpdateTimeTask);
//int totalDuration = mp.getDuration();
// currentPosition = utils.progressToTimer(seekBar.getProgress(), totalDuration);
// forward or backward to certain seconds
//mp.seekTo(currentPosition);
// update timer progress again
//updateProgressBar();
Toast.makeText(getApplicationContext(), "This facility is disabled",Toast.LENGTH_SHORT).show();
}
/**
* On Song Playing completed
* if repeat is ON play same song again
* if shuffle is ON play random song
* */
@Override
public void onCompletion(MediaPlayer arg0) {
// check for repeat is ON or OFF
if(isRepeat){
// repeat is on play same song again
playSong(currentSongIndex);
} else if(isShuffle){
// shuffle is on - play a random song
Random rand = new Random();
currentSongIndex = rand.nextInt((songsList.size() - 1) - 0 + 1) + 0;
playSong(currentSongIndex);
} else{
// no repeat or shuffle ON - play next song
if(currentSongIndex < (songsList.size() - 1)){
playSong(currentSongIndex + 1);
currentSongIndex = currentSongIndex + 1;
}else{
// play first song
playSong(0);
currentSongIndex = 0;
}
}
}
@Override
public void onDestroy(){
super.onDestroy();
mp.release();
}
}
答案 0 :(得分：0)
从log cat我观察到的是你已经覆盖了activty的onResume（）方法，但没有调用super方法。尝试按如下方式实现onResume（）。
@Override
protected void onResume() {
super.onResume();
//Your code here
}
请注意，super.onResume（）必须是onResume（）函数内的第一个调用。
希望这有帮助。
答案 1 :(得分：0)
01-13 00：25：41.070：E / AndroidRuntime（955）：进程：com.tmp.timbremediaplayer，PID：955 01-13 00：25：41.070：E / AndroidRuntime（955）：java.lang.RuntimeException：无法恢复活动{com.tmp.timbremediaplayer / com.tmp.timbremediaplayer.MusicPlayerActivity}：android.util.SuperNotCalledException：Activity { com.tmp.timbremediaplayer / com.tmp.timbremediaplayer.MusicPlayerActivity}没有调用super.onResume（）
您忘了拨打 super.onResume（）
答案 2 :(得分：0)
从日志里面说的是你“没有打电话给super.onResume（）” 因此，如果要覆盖'onResume'，则在Activity类中，它应该如下所示
protected void onResume()
{
super.onResume();//This is important
//Your code goes here
}
如果您已经完成此操作，请发布您的活动代码