[英]How to do Rename/Delete operations on audio files which are in SD card
我正在嘗試刪除和重命名SD卡中的音頻文件,因此這是我的代碼,用於顯示SD卡中的音頻文件列表。
// Use the current directory as title
path = "/sdcard/";
if (getIntent().hasExtra("path")) {
path = getIntent().getStringExtra("path");
}
setTitle(path);
// Read all files sorted into the values-array
values = new ArrayList();
File dir = new File(path);
if (!dir.canRead()) {
setTitle(getTitle() + " (inaccessible)");
}
final String[] list = dir.list();
if (list != null) {
for (String file : list) {
if (file.contains(".3gp")) {
values.add(file);
}
}
}
Collections.sort(values);
// Put the data into the list
adapter = new ArrayAdapter(this,
android.R.layout.simple_list_item_2, android.R.id.text1, values);
setListAdapter(adapter);
在這里我可以顯示所有音樂文件,但是如果我嘗試重命名或刪除操作,那么它對SD卡中的文件沒有影響,建議我采取一些解決方案,請刪除並重命名代碼
case CONTEXT_MENU_DELETE:
Toast.makeText(
this,
"You selected item " + context_menu_number
+ " from the context menu", Toast.LENGTH_SHORT)
.show();
Toast.makeText(
this,
"You removed item " + number_of_item_in_listview
+ " from the list", Toast.LENGTH_SHORT).show();
values.remove(number_of_item_in_listview);
// myadapter.notifyDataSetChanged(); //if this does not work,
// reinitialize the adapter:
adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, android.R.id.text1,
values);
myList.setAdapter(adapter);
File f = new File(path + filename);
if (f != null && f.exists()) {
// delete it
f.delete();
}
return (true);
嘗試以下代碼從sdcard刪除文件。
File file = new File(FilePath);
boolean deleted = file.delete();
其中FilePath
是要刪除的文件的路徑,例如:
/sdcard/YourCustomDirectory/YourFile.mp3
同時給予許可
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
在AndroidManifest.xml
文件中
添加權限以首先在xml中寫外部存儲。
String newName ="new Name";
File oldFile = new File(Environment.getExternalStorageDirectory()+songName);
File latestname = new File(Enviornment.get+ newName + ".mp3");
boolean success = oldFile .renameTo(latestname );
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