我正在录制音频并将其与日期一起存储在SD卡中。这是我的代码 添加音频文件的日期和其他详细信息。
audioFileName=input.getText().toString();
current = System.currentTimeMillis();
String artist = "" + getResources().getText(R.string.artistName);
ContentValues values = new ContentValues();
values.put(MediaStore.MediaColumns.DATA, audiofile.getAbsolutePath());
values.put(MediaStore.MediaColumns.TITLE, audioFileName);
values.put(MediaStore.Audio.Media.DATE_ADDED, (int) current );
callMessage();
values.put(MediaStore.MediaColumns.MIME_TYPE, "audio/3gpp");
values.put(MediaStore.Audio.Media.ARTIST, artist);
values.put(MediaStore.Audio.Media.DATA, audiofile.getAbsolutePath());
ContentResolver contentResolver = getContentResolver();
Uri base = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
Uri newUri1 = contentResolver.insert(base, values);
这是我的代码，我可以获取音频的所有细节。
try {
mAdapter = new SimpleCursorAdapter(
this,
// Use a template that displays a text view
R.layout.media_select_row,
// Give the cursor to the list adatper
createCursor(""),
// Map from database columns...
new String[] {
String.valueOf(MediaStore.Audio.Media.DATE_ADDED ),
MediaStore.Audio.Media.ALBUM,
MediaStore.Audio.Media.TITLE,
MediaStore.Audio.Media._ID,
MediaStore.Audio.Media._ID},
// To widget ids in the row layout...
new int[] {
R.id.row_date,
R.id.row_album,
R.id.row_title,
R.id.row_icon,
R.id.row_options_button});
setListAdapter(mAdapter);
getListView().setItemsCanFocus(true);
// Normal click - open the editor
getListView().setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView parent,
View view,
int position,
long id) {
startRecordingEditor();
}
});
} catch (SecurityException e) {
// No permission to retrieve audio?
Log.e("RecordingApp", e.toString());
// todo error 1
} catch (IllegalArgumentException e) {
// No permission to retrieve audio?
Log.e("RecordingApp", e.toString());
// todo error 2
}
mAdapter.setViewBinder(new SimpleCursorAdapter.ViewBinder() {
public boolean setViewValue(View view,
Cursor cursor,
int columnIndex) {
if (view.getId() == R.id.row_options_button){
// Get the arrow image view and set the onClickListener to open the context menu.
ImageView iv = (ImageView)view;
iv.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
openContextMenu(v);
}
});
return true;
} else if (view.getId() == R.id.row_icon) {
setSoundIconFromCursor((ImageView) view, cursor);
return true;
}
return false;
}
});
它显示其他详细信息，但是当我想使用DATE_ADDED显示日期时，它显示了
跟随我无法理解的错误。
08-09 13:15:52.519: E/AndroidRuntime(3265): FATAL EXCEPTION: main
08-09 13:15:52.519: E/AndroidRuntime(3265): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.blitze.recordingapp/com.blitze.recordingapp.RecorderListActivity}: java.lang.NullPointerException
08-09 13:15:52.519: E/AndroidRuntime(3265): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
08-09 13:15:52.519: E/AndroidRuntime(3265): at android.app.ActivityThread.startActivityNow(ActivityThread.java:1797)
08-09 13:15:52.519: E/AndroidRuntime(3265): at android.view.View.performClick(View.java:3511)
08-09 13:15:52.519: E/AndroidRuntime(3265): at java.lang.reflect.Method.invokeNative(Native Method)
08-09 13:15:52.519: E/AndroidRuntime(3265): at java.lang.reflect.Method.invoke(Method.java:511)
08-09 13:15:52.519: E/AndroidRuntime(3265): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
08-09 13:15:52.519: E/AndroidRuntime(3265): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
08-09 13:15:52.519: E/AndroidRuntime(3265): at dalvik.system.NativeStart.main(Native Method)
08-09 13:15:52.519: E/AndroidRuntime(3265): Caused by: java.lang.NullPointerException
08-09 13:15:52.519: E/AndroidRuntime(3265): at com.blitze.recordingapp.RecorderListActivity.onCreate(RecorderListActivity.java:149)
08-09 13:15:52.519: E/AndroidRuntime(3265): at android.app.Activity.performCreate(Activity.java:4465)
08-09 13:15:52.519: E/AndroidRuntime(3265): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
08-09 13:15:52.519: E/AndroidRuntime(3265): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
我正在尝试尝试但无法从SD卡获取日期 请有人指点我正确的观点 在此先感谢。
答案 0 :(得分：1)
myCursor = null;
SimpleDateFormat formatter = new SimpleDateFormat("dd-MMM-yyyy");
String[] STAR = { "*" };
String selection = MediaStore.Audio.Media.IS_MUSIC + " != 0";
try {
myCursor = getActivity().getContentResolver().query(
MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, null, null,
null, null);
count = myCursor.getCount();
naming = new String[count];
Log.d("TAG", "count" + count);
myCursor.moveToFirst();
Log.d("TAG", "inside if after last called");
do {
music_column_index = myCursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.DISPLAY_NAME);
name = myCursor.getString(music_column_index);
String DATA = myCursor.getString(myCursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA));
int duration = myCursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.DURATION);
int s = myCursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.SIZE);
// myCursor.moveToPosition(i);
Long tm = myCursor
.getLong(myCursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.DATE_MODIFIED));
// String date = tm.toString();
String dateString = DateFormat.format("MM/dd/yyyy",
new Date(tm)).toString();
Log.d("TAG", "date:" + dateString);
size = "" + s + "KB";
// size = myCursor.getString(duration) + "KB"; //
// String time = myCursor.getString(tm);
Log.d("TAG", "size:" + size);
} while (myCursor.moveToNext());
myCursor.close();
`
答案 1 :(得分：0)
崩溃：MediaStore.Audio.Media.DATE_ADDED不存在。
MediaStore.Audio.Media.DATE_MODIFIED时间为1970/01/01 00:00:00。
使用File.lastModified()代替！
SimpleDateFormat SDF = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, R.layout.item, cursor, new String[]{ MediaStore.Audio.Media.DATA, MediaStore.Audio.Media.DATA, MediaStore.Audio.Media.SIZE, MediaStore.Audio.Media.DATA, MediaStore.Audio.Media._ID }, new int[]{R.id.textView_path, R.id.textView_name, R.id.textView_size, R.id.textView_time, R.id.imageView_icon}, CursorAdapter.FLAG_AUTO_REQUERY);
adapter.setViewBinder(new SimpleCursorAdapter.ViewBinder() {
public boolean setViewValue(View view, Cursor cursor, int columnIndex) {
if (view.getId() == R.id.textView_name) {
String path = cursor.getString(columnIndex);
((TextView) view).setText(path.substring(path.lastIndexOf("/") + 1));
return true;
} else if (view.getId() == R.id.textView_size) {
long filesize = cursor.getLong(columnIndex);
((TextView) view).setText(Formatter.formatFileSize(CategoryActivity.this, filesize));
return true;
} else if (view.getId() == R.id.textView_time) {
path = cursor.getString(columnIndex);
File file = new File(path);
Date date = new Date(file.lastModified());
((TextView) view).setText(SDF.format(date));
return true;
} else if (view.getId() == R.id.imageView_icon) {
((ImageView) view).setImageResource(R.mipmap.audiofile);
return true;
}
return false;
}
});