如何在android中制作sdcard中的文件夹
我正在尝试将我的收件箱短信备份到SD卡的文件夹中。但我无法在SD卡上创建文件夹,我正在使用此代码如何在android中制作sdcard中的文件夹,android,sd-card,android-sdcard,Android,Sd Card,Android Sdcard,我正在尝试将我的收件箱短信备份到SD卡的文件夹中。但我无法在SD卡上创建文件夹,我正在使用此代码 backup=(Button)findViewById(R.id.backup); backup.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View arg0) { backupSMS(); } public ArrayLis
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-" + SystemClock.currentThreadTimeMillis() + ".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();
}
}
});
有了这段代码,我可以备份,但不能在文件夹中。请帮助我,我是android新手,提前感谢如果你创建了一个文件对象来包装顶级目录,你可以调用它的mkdirs方法来构建所有需要的目录。比如:
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-" + SystemClock.currentThreadTimeMillis() + ".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();
}
}
});
// create a File object for the parent directory
File wallpaperDirectory = new File("/sdcard/Wallpaper/");
// have the object build the directory structure, if needed.
wallpaperDirectory.mkdirs();
// create a File object for the output file
File outputFile = new File(wallpaperDirectory, filename);
// now attach the OutputStream to the file object, instead of a String representation
FileOutputStream fos = new FileOutputStream(outputFile);
注意:使用Environment.getExternalStorageDirectory获取SD卡目录可能是明智的,因为如果手机附带SD卡以外的内容,例如内置闪存、iPhone,则SD卡目录可能会发生变化。无论哪种方式,您都应该记住,您需要检查以确保它确实存在,因为SD卡可能会被移除
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-" + SystemClock.currentThreadTimeMillis() + ".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();
}
}
});
更新:由于API级别4 1.6,您还必须申请许可。清单中的类似内容应该会起作用:
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-" + SystemClock.currentThreadTimeMillis() + ".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();
}
}
});
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
如果您创建了一个封装顶级目录的文件对象,您可以调用它的mkdirs方法来构建所有需要的目录。比如:
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-" + SystemClock.currentThreadTimeMillis() + ".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();
}
}
});
// create a File object for the parent directory
File wallpaperDirectory = new File("/sdcard/Wallpaper/");
// have the object build the directory structure, if needed.
wallpaperDirectory.mkdirs();
// create a File object for the output file
File outputFile = new File(wallpaperDirectory, filename);
// now attach the OutputStream to the file object, instead of a String representation
FileOutputStream fos = new FileOutputStream(outputFile);
注意:使用Environment.getExternalStorageDirectory获取SD卡目录可能是明智的,因为如果手机附带SD卡以外的内容,例如内置闪存、iPhone,则SD卡目录可能会发生变化。无论哪种方式,您都应该记住,您需要检查以确保它确实存在,因为SD卡可能会被移除
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-" + SystemClock.currentThreadTimeMillis() + ".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();
}
}
});
更新:由于API级别4 1.6,您还必须申请许可。清单中的类似内容应该会起作用:
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-" + SystemClock.currentThreadTimeMillis() + ".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();
}
}
});
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
还要检查SD卡是否已安装
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-" + SystemClock.currentThreadTimeMillis() + ".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();
}
}
});
if (android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED))
{
// sd card mounted
}
File direct = new File(Environment.getExternalStorageDirectory() + "/YourFolder");
if(!direct.exists())
{
if(direct.mkdir())
{
//directory is created;
}
}
我忘了提到你需要在舱单中提供许可
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-" + SystemClock.currentThreadTimeMillis() + ".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();
}
}
});
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
默认情况下,有了上述权限,您也将拥有读取权限
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-" + SystemClock.currentThreadTimeMillis() + ".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();
}
}
});
此外,最好使用File.separator而不是/还应检查SD卡是否已安装
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-" + SystemClock.currentThreadTimeMillis() + ".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();
}
}
});
if (android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED))
{
// sd card mounted
}
File direct = new File(Environment.getExternalStorageDirectory() + "/YourFolder");
if(!direct.exists())
{
if(direct.mkdir())
{
//directory is created;
}
}
我忘了提到你需要在舱单中提供许可
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-" + SystemClock.currentThreadTimeMillis() + ".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();
}
}
});
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
默认情况下,有了上述权限,您也将拥有读取权限
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-" + SystemClock.currentThreadTimeMillis() + ".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();
}
}
});
此外,最好使用File.separator而不是/有关详细信息,请参阅[此][1][1]:有关详细信息,请参阅[此][1][1]:
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-" + SystemClock.currentThreadTimeMillis() + ".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();
}
}
});