私は自分のSDカードにSMSをバックアップしようとしていますが、それは機能していますが、バックアップを取っているときに以前に保存されたファイルを削除するという問題が1つあります。しかし、SDカードにすべてのファイルを保存したいです。私はこのコードを使用しています
backup=(Button)findViewById(R.id.backup);
backup.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
backupSMS();
}
public ArrayList<String> smsBuffer = new ArrayList<String>();
String smsFile = "SMS"+".csv";
private void backupSMS() {
smsBuffer.clear();
Uri mSmsinboxQueryUri = Uri.parse("content://sms/inbox");
Cursor cursor1 = getContentResolver().query(
mSmsinboxQueryUri,
new String[] { "_id", "thread_id", "address", "person", "date",
"body", "type" }, null, null, null);
//startManagingCursor(cursor1);
String[] columns = new String[] { "_id", "thread_id", "address", "person", "date", "body",
"type" };
if (cursor1.getCount() > 0) {
String count = Integer.toString(cursor1.getCount());
Log.d("Count",count);
while (cursor1.moveToNext()) {
String messageId = cursor1.getString(cursor1
.getColumnIndex(columns[0]));
String threadId = cursor1.getString(cursor1
.getColumnIndex(columns[1]));
String address = cursor1.getString(cursor1
.getColumnIndex(columns[2]));
String name = cursor1.getString(cursor1
.getColumnIndex(columns[3]));
String date = cursor1.getString(cursor1
.getColumnIndex(columns[4]));
String msg = cursor1.getString(cursor1
.getColumnIndex(columns[5]));
String type = cursor1.getString(cursor1
.getColumnIndex(columns[6]));
smsBuffer.add(messageId + ","+ threadId+ ","+ address + "," + name + "," + date + " ," + msg + " ,"
+ type);
}
generateCSVFileForSMS(smsBuffer);
}
}
private void generateCSVFileForSMS(ArrayList<String> list)
{
try
{
String storage_path = Environment.getExternalStorageDirectory().toString() + File.separator + smsFile;
FileWriter write = new FileWriter(storage_path);
write.append("messageId, threadId, Address, Name, Date, msg, type");
write.append('\n');
write.append('\n');
for (String s : list)
{
write.append(s);
write.append('\n');
}
write.flush();
write.close();
}
catch (NullPointerException e)
{
System.out.println("Nullpointer Exception "+e);
// e.printStackTrace();
}
catch (IOException e)
{
e.printStackTrace();
}
catch (Exception e)
{
e.printStackTrace();
}
}
});
私がAndroidを初めて使用するのを手伝ってください。前もって感謝します