我无法从列表视图的项目中获取对应数据。 我在这里使用短信和电子邮件模板。当我点击短信或任何电子邮件列表视图项时，它将在编辑文本格式数据库中打开，然后可以更新数据然后存储。对应于电子邮件或短信.i为数据库创建字段为电子邮件和短信模板，如 id，template_name，message，template_code（0,1），即使用短信或电子邮件指定在i上。 这里有三个活动ManageEmailTemplate，ManageSmsTemplate，用于下一个活动，即SMSTemplateEdit
ManageEmailTemplate.java
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.manage_email_template);
//-------------------------
dba = new MyDB(this);
dba.open();
mQuery = "Select " +
Constants.KEY_ID_GREET + "," +
Constants.GREETING_NAME + "," +
Constants.GREETING_MESSAGE+ "," +
Constants.KEY_ID_SETUP_GREET +
" from " + Constants.TABLE_NAME_GREETINGS +
" where " + Constants.KEY_ID_SETUP_GREET + " = " + Constants.EMAIL_CODE;
c = dba.getResults( mQuery );
startManagingCursor(c);
String[] resultColumns;
if( c != null && c.moveToFirst()){
}
int[] textviews = new int[] {android.R.id.text1};
resultColumns = new String[] { Constants.GREETING_NAME};
mAdapter = new SimpleCursorAdapter(this, android.R.layout.simple_list_item_1, c, resultColumns, textviews);
this.setListAdapter(mAdapter);
getListView().setTextFilterEnabled(true);
//dba.close();
//-------------------------
// Create Email Templates
//setup Create Email Templates Listener
Button createEmailTemplatesButton = (Button) findViewById(R.id.create_email_template_button);
createEmailTemplatesButton.setOnClickListener(new OnClickListener(){
public void onClick(View view){
showCreateEmailTemplate();
}
});
}
private void showCreateEmailTemplate(){
Intent i = new Intent(this, CreateNewTemplate.class);
i.putExtra("template_type","email");
//startActivity(i);
startActivityForResult(i, mRequestCode);
}
@Override
public void onItemClick(AdapterView<?> parent, View v,
int position, long id)
{
super.onItemClick(parent, v, position, id);
final Cursor c = (Cursor) mAdapter.getItem(position);
String name = c.getString(c.getColumnIndex( Constants.GREETING_NAME ));
final int template_id = c.getInt(c.getColumnIndex( Constants.KEY_ID_GREET ));
temp_id=String.valueOf(template_id);
goForEdit();
//confirm
Toast.makeText(this,
"Name :"+name+" id : " +template_id , Toast.LENGTH_LONG)
.show();
}
public void goForEdit(){
Intent launchSMSTempEdit = new Intent(
ManageEmailTemplate.this,
EmailSMSTempEdit.class);
launchSMSTempEdit.getExtras().get("selection"));
// startActivity(launchSMSTempEdit);
// Toast.makeText(this, temp_id, Toast.LENGTH_LONG).show();
// startActivity(launchSMSTempEdit);
SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
//now get Editor
SharedPreferences.Editor editor = sharedPref.edit();
//put your value
editor.putString("Temp_id", temp_id);
editor.putString("template_type", "email");
//commits your edits
editor.commit();
startActivity(launchSMSTempEdit);
}
}
ManageSMSTemplate.java
public class ManageSMSTemplate extends
ActionBarListActivity {
private MyDB dba;
private Cursor c;
String temp_id;
private SimpleCursorAdapter mAdapter;
private int mRequestCode = 0000;
ListView lst;
private String mQuery;
/** Called when the activity is first created. */
@SuppressWarnings("deprecation")
@Override
public void onCreate(Bundle savedInstanceState)
{
lst =(ListView)findViewById(android.R.id.list);
super.onCreate(savedInstanceState);
setContentView(R.layout.manage_sms_template);
// -------------------------
dba = new MyDB(this);
dba.open();
mQuery = "Select " + Constants.KEY_ID_GREET + ","
+ Constants.GREETING_NAME + ","
+ Constants.GREETING_MESSAGE + ","
+ Constants.KEY_ID_SETUP_GREET + " from "
+ Constants.TABLE_NAME_GREETINGS
+ " where " + Constants.KEY_ID_SETUP_GREET
+ " = " + Constants.SMS_CODE;
c = dba.getResults(mQuery);
startManagingCursor(c);
String[] resultColumns;
if (c != null && c.moveToFirst()) {
}
int[] textviews = new int[] { android.R.id.text1 };
resultColumns = new String[] { Constants.GREETING_NAME };
mAdapter = new SimpleCursorAdapter(this,
android.R.layout.simple_list_item_1, c,
resultColumns, textviews);
this.setListAdapter(mAdapter);
getListView().setTextFilterEnabled(true);
// -------------------------
// Create sms Templates
// setup Create SMS Templates Listener
Button createSMSTemplatesButton = (Button) findViewById(R.id.create_sms_template_button);
createSMSTemplatesButton
.setOnClickListener(new OnClickListener() {
public void onClick(View view)
{
showCreateSMSTemplate();
}
});
}
private void showCreateSMSTemplate()
{
Intent i = new Intent(this, CreateNewTemplate.class);
i.putExtra("template_type", "sms");
startActivityForResult(i, mRequestCode);
}
@Override
protected void onActivityResult(int requestCode,
int resultCode, Intent data)
{
super.onActivityResult(requestCode, resultCode,
data);
Log.v("Crash",
"Returned from template creation in SMStemplate Manager");
if (mAdapter == null)
Log.d("Crash", "SMS-Manager - mAdapter is NULL");
else
Log.d("Crash",
"SMS-Manager - mAdapter is NOT Null");
if (requestCode == mRequestCode) {
if (resultCode == RESULT_OK) {
if (mAdapter.getCursor() != null)
mAdapter.getCursor().requery();
mAdapter.notifyDataSetChanged();
}
}
}
@Override
protected void onDestroy()
{
dba.close();
super.onDestroy();
}
@Override
public void onItemClick(AdapterView<?> parent, View v,
int position, long id)
{
super.onItemClick(parent, v, position, id);
final Cursor c = (Cursor) mAdapter
.getItem(position);
String name = c.getString(c
.getColumnIndex(Constants.GREETING_NAME));
final int template_id = c.getInt(c
.getColumnIndex(Constants.KEY_ID_GREET));
temp_id=String.valueOf(template_id);
goForEdit();
// confirm
Toast.makeText(this,
"Name :"+name+" id : " +template_id , Toast.LENGTH_LONG)
.show();
}
public void goForEdit(){
Intent launchSMSTempEdit = new Intent(
ManageSMSTemplate.this,
EmailSMSTempEdit.class);
// Intent i = new Intent(ManageSMSTemplate.this, SMSTempEdit.class);
//i.putExtra("KeyId", temp_id.toString());
// startActivity(i);
// launchSMSTempEdit.putExtra("selection", temp_id.toString());
// Log.d("*** OUTBOUND INTENT: ", "" + launchSMSTempEdit.getExtras().get("selection"));
// startActivity(launchSMSTempEdit);
// Toast.makeText(this, temp_id, Toast.LENGTH_LONG).show();
// startActivity(launchSMSTempEdit);
SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
//now get Editor
SharedPreferences.Editor editor = sharedPref.edit();
//put your value
editor.putString("userName", temp_id);
editor.putString("template_type", "sms");
//commits your edits
editor.commit();
startActivity(launchSMSTempEdit);
}
}
EmailSMSTempEdit.java
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.create_template);
// sms_key_id=getIntent().getStringExtra("id");
// String sms_key_id;
// if (savedInstanceState == null) {
// Bundle extras = getIntent().getExtras();
// if(extras == null) {
// sms_key_id= null;
// } else {
// sms_key_id= extras.getString("STRING_I_NEED");
// }
// } else {
// sms_key_id= (String) savedInstanceState.getSerializable("STRING_I_NEED");
// }
SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
sms_key_id = sharedPref.getString("userName", "Not Available");
mTemplateType=sharedPref.getString("template_type", "Not Available");
Toast.makeText(this, mTemplateType, Toast.LENGTH_LONG).show();
dba = new MyDB(this);
dba.open() ;
//array to hold values to show in spinner
nameTypeArr = new String[]{getString(R.string.insert_name_prompt),
getString(R.string.first_name),
getString(R.string.last_name)};
//get views from xml
mNameBox = (EditText) findViewById(R.id.template_name_box);
mSubjectBox = (EditText) findViewById(R.id.template_subject_box);
mMessageBox = (EditText) findViewById(R.id.template_message_box);
mInsertNameSpinner = (Spinner) findViewById(R.id.insert_name_here_spinner);
//create adapter for the spinner and set it
ArrayAdapter<String> mAdapter1=
new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, nameTypeArr);
mAdapter1.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
mInsertNameSpinner.setAdapter(mAdapter1);
//listener for the spinner
mInsertNameSpinner.setOnItemSelectedListener(new OnItemSelectedListener()
{
@Override
public void onItemSelected(AdapterView<?> parent,
View view, int pos, long id) {
//if the spinner has just been created, ignore this call to onItemSelected
if(spinnerBeingCreated == true){
spinnerBeingCreated = false;
return;
}
//what item did the user click in spinner
String typeOfName = parent.getItemAtPosition(pos).toString();
//based on user choice, insert corresponding placeholder in text
if(typeOfName.equals( getString(R.string.first_name) )){
insertAtCurrentLocation( getString(R.string.first_name_placeholder) );
}else if(typeOfName.equals( getString(R.string.last_name) )){
insertAtCurrentLocation( getString(R.string.last_name_placeholder) );
}
//reset the spinner item selection back to first one
mInsertNameSpinner.setSelection(0);
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {}
});
//if its a template for sms, hide the subject line
LinearLayout subjectarea = (LinearLayout) findViewById(R.id.template_subject_box_container);
if(mTemplateType.equals("sms")){
subjectarea.setVisibility(View.GONE);
} else if(mTemplateType.equals("email")){
subjectarea.setVisibility(View.VISIBLE);
}
fillData(sms_key_id);
//Save the template
//setup Save Template Listener
Button saveTemplateButton = (Button) findViewById(R.id.save_template_button);
saveTemplateButton.setOnClickListener(new OnClickListener(){
public void onClick(View view){
// saveTemplate();
updateTemplate(sms_key_id);
}
});
//Cancel
//Cancel Listener
Button cancelTemplateButton = (Button) findViewById(R.id.cancel_template_button);
cancelTemplateButton.setOnClickListener(new OnClickListener(){
public void onClick(View view){
finish();
}
});
}
public void fillData(String sms_key_id) {
Toast.makeText(EmailSMSTempEdit.this, sms_key_id, Toast.LENGTH_LONG).show();
dba.open();
String queryStr =
"Select " +
"*" + " from " +
Constants.TABLE_NAME_GREETINGS +
" where "+ Constants.KEY_ID_GREET+"=" + sms_key_id ;
//Toast.makeText(this, queryStr, Toast.LENGTH_SHORT).show();
c = dba.getResults(queryStr);
startManagingCursor(c);
if(c.moveToFirst()){
do{
mNameBox.setText(c.getString(c.getColumnIndex(Constants.GREETING_NAME)));
mMessageBox.setText(c.getString(c.getColumnIndex(Constants.GREETING_MESSAGE)));
// System.out.println(c.getString(c.getColumnIndex(Constants.KEY_ID_GREET)));
// System.out.println(c.getString(c.getColumnIndex(Constants.GREETING_NAME)));
// System.out.println(c.getString(c.getColumnIndex(Constants.GREETING_MESSAGE)));
// System.out.println(c.getString(c.getColumnIndex(Constants.KEY_ID_SETUP_GREET)));
} while(c.moveToNext());
}
}
public void updateTemplate(String sms_key_id){
String subject = mSubjectBox.getText().toString();
String name = mNameBox.getText().toString();
String message = mMessageBox.getText().toString();
dba.open();
//if name is null or empty, don't save
if(name == null || name.equals("")){
Toast.makeText(this, R.string.empty_template_name_error, Toast.LENGTH_LONG).show();
return;
}
//whether its sms or email, requied fro db query
int messageTypeCode = -1; //for sms, it is 0. For email it is 1
if(mTemplateType.equals("email")){
message = subject + subjectMessageDelimiter + message; //|~| is the delimiter
messageTypeCode = Constants.EMAIL_CODE;
} else if(mTemplateType.equals("sms")){
messageTypeCode = Constants.SMS_CODE;
}
String Stmt = "update " +
Constants.TABLE_NAME_GREETINGS +
" set "+
Constants.GREETING_NAME+"='"+name + "',"+
Constants.GREETING_MESSAGE+"='"+message + "'," +
Constants.KEY_ID_SETUP_GREET+"='"+messageTypeCode +"'" +
" where "+ Constants.KEY_ID_GREET+"=" + sms_key_id ;
dba.execute(Stmt);
dba.close();
Toast.makeText(this, "Successfully updated Template: " + name, Toast.LENGTH_LONG).show();
//finish the activity
// setResult(RESULT_OK, null);
finish();
}
@Override
protected void onDestroy(){
//dba.close();
super.onDestroy();
}
//insert at currnet cursor location in subject or message field
private void insertAtCurrentLocation(String str){
int start, end;
if(mMessageBox.hasFocus()){
start = mMessageBox.getSelectionStart();
end = mMessageBox.getSelectionEnd();
mMessageBox.getText().replace(Math.min(start, end), Math.max(start, end),
str, 0, str.length());
} else if(mSubjectBox.hasFocus()){
start = mSubjectBox.getSelectionStart();
end = mSubjectBox.getSelectionEnd();
mSubjectBox.getText().replace(Math.min(start, end), Math.max(start, end),
str, 0, str.length());
}
}
private boolean alreadyExists(String templateName){
int type_code = -1;
if(mTemplateType.equals("sms")){
type_code = Constants.SMS_CODE;
} else if(mTemplateType.equals("email")){
type_code = Constants.EMAIL_CODE;
}
String query = "Select * from " + Constants.TABLE_NAME_GREETINGS
+ " where " + Constants.GREETING_NAME + " = '" + templateName
+ "' AND " + Constants.KEY_ID_SETUP_GREET + "=" + type_code;
Cursor c = null;
Boolean exists = false;
dba.open();
try {
c = dba.getResults( query );
if (c != null) {
if (c.moveToFirst()) {
exists = (c.getCount() > 0);
} else {
exists = false;
}
}
} catch (Exception e) {
Log.e("CreateNewTemplate", "Error while checking if name already exists. Details: "+e.getMessage(), e);
e.printStackTrace();
} finally {
if (c != null)
c.close();
dba.close();
}
return exists;
}
}
答案 0 :(得分：0)
将光标移动到您单击的列表视图项的位置，然后使用该光标从db获取数据。下面是一个小片段：
yourListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if(cursor!=null){
cursor.moveToPosition(position);
//do your stuff here....
cursor.close();
}
}
});