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我的列表視圖活動：如何使用編輯字段更新sql表？
public class List extends ActionBarActivity{
private CustomCursorAdapter customAdapter;
private PersonDatabaseHelper databaseHelper;
private static final int ENTER_DATA_REQUEST_CODE = 1;
private ListView listView;
private static final String TAG = List.class.getSimpleName();
/**
* Called when the activity is first created.
*/
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.listview);
databaseHelper = new PersonDatabaseHelper(this);
listView = (ListView) findViewById(R.id.list_data);
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Log.d(TAG, "clicked on item: " + position);
Intent intent = new Intent(List.this, Edit.class);
intent.putExtra("id", position);
startActivity(intent);
}
});
listView.setOnLongClickListener(new OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
return false;
// TODO Auto-generated method stub
}
});
// Database query can be a time consuming task ..
// so its safe to call database query in another thread
// Handler, will handle this stuff for you <img src="http://s0.wp.com/wp-includes/images/smilies/icon_smile.gif?m=1129645325g" alt=":)" class="wp-smiley">
new Handler().post(new Runnable() {
@Override
public void run() {
customAdapter = new CustomCursorAdapter(List.this, databaseHelper.getAllData());
listView.setAdapter(customAdapter);
}
});
}
public void onClickEnterData(View btnAdd) {
startActivityForResult(new Intent(this, Permission.class), ENTER_DATA_REQUEST_CODE);
}
public void onClickLogOut(View btnLogOut){
Intent intent = new Intent(List.this,
MainActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
databaseHelper.insertData(data.getExtras().getString("tag_person_name"), data.getExtras().getString("tag_person_surname"),data.getExtras().getString("tag_person_enterdate"),data.getExtras().getString("tag_person_entertime"),data.getExtras().getString("tag_person_exitdate"),data.getExtras().getString("tag_person_exittime"));
customAdapter.changeCursor(databaseHelper.getAllData());
}
}
}
這是我的SQL助手：
public class PersonDatabaseHelper {
private static final String TAG = PersonDatabaseHelper.class.getSimpleName();
// database configuration
// if you want the onUpgrade to run then change the database_version
private static final int DATABASE_VERSION = 7;
private static final String DATABASE_NAME = "database.db";
// table configuration
private static final String TABLE_NAME = "person_table"; // Table name
private static final String PERSON_TABLE_COLUMN_ID = "_id"; // a column named "_id" is required for cursor
private static final String PERSON_TABLE_COLUMN_NAME = "person_name";
private static final String PERSON_TABLE_COLUMN_SURNAME = "person_surname";
private static final String PERSON_TABLE_COLUMN_ENTERDATE = "person_enterdate";
private static final String PERSON_TABLE_COLUMN_ENTERTIME = "person_entertime";
private static final String PERSON_TABLE_COLUMN_EXITDATE = "person_exitdate";
private static final String PERSON_TABLE_COLUMN_EXITTIME = "person_exittime";
private DatabaseOpenHelper openHelper;
private SQLiteDatabase database;
// this is a wrapper class. that means, from outside world, anyone will communicate with PersonDatabaseHelper,
// but under the hood actually DatabaseOpenHelper class will perform database CRUD operations
public PersonDatabaseHelper(Context aContext) {
openHelper = new DatabaseOpenHelper(aContext);
database = openHelper.getWritableDatabase();
}
public void insertData (String aPersonName, String aPersonSurName, String aPersonEnterDate,String aPersonEnterTime, String aPersonExitDate,String aPersonExitTime) {
// we are using ContentValues to avoid sql format errors
ContentValues contentValues = new ContentValues();
contentValues.put(PERSON_TABLE_COLUMN_NAME, aPersonName);
contentValues.put(PERSON_TABLE_COLUMN_SURNAME, aPersonSurName);
contentValues.put(PERSON_TABLE_COLUMN_ENTERDATE, aPersonEnterDate);
contentValues.put(PERSON_TABLE_COLUMN_ENTERTIME, aPersonEnterTime);
contentValues.put(PERSON_TABLE_COLUMN_EXITDATE, aPersonExitDate);
contentValues.put(PERSON_TABLE_COLUMN_EXITTIME, aPersonExitTime);
database.insert(TABLE_NAME, null, contentValues);
}
public Cursor getAllData() {
String buildSQL = "SELECT * FROM " + TABLE_NAME;
Log.d(TAG, "getAllData SQL: " + buildSQL);
return database.rawQuery(buildSQL, null);
}
// this DatabaseOpenHelper class will actually be used to perform database related operation
private class DatabaseOpenHelper extends SQLiteOpenHelper {
public DatabaseOpenHelper(Context aContext) {
super(aContext, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase sqLiteDatabase) {
// Create your tables here
String buildSQL = "CREATE TABLE " + TABLE_NAME + "(" + PERSON_TABLE_COLUMN_ID + " INTEGER PRIMARY KEY, " +
PERSON_TABLE_COLUMN_NAME + " TEXT, " + PERSON_TABLE_COLUMN_SURNAME + " TEXT, " + PERSON_TABLE_COLUMN_ENTERDATE + " TEXT," + PERSON_TABLE_COLUMN_ENTERTIME + " TEXT," + PERSON_TABLE_COLUMN_EXITDATE + " TEXT," + PERSON_TABLE_COLUMN_EXITTIME + " TEXT)";
Log.d(TAG, "onCreate SQL: " + buildSQL);
sqLiteDatabase.execSQL(buildSQL);
}
@Override
public void onUpgrade(SQLiteDatabase sqLiteDatabase, int oldVersion, int newVersion) {
// Database schema upgrade code goes here
String buildSQL = "DROP TABLE IF EXISTS " + TABLE_NAME;
Log.d(TAG, "onUpgrade SQL: " + buildSQL);
sqLiteDatabase.execSQL(buildSQL); // drop previous table
onCreate(sqLiteDatabase); // create the table from the beginning
}
}
}
這是我的自定義適配器類
public class CustomCursorAdapter extends CursorAdapter {
@SuppressWarnings("deprecation")
public CustomCursorAdapter(Context context, Cursor c) {
super(context, c);
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
// when the view will be created for first time,
// we need to tell the adapters, how each item will look
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
View retView = inflater.inflate(R.layout.single_row_item, parent, false);
return retView;
}
@Override
public void bindView(View view, Context context, Cursor cursor) {
// here we are setting our data
// that means, take the data from the cursor and put it in views
TextView textViewPersonName = (TextView) view.findViewById(R.id.name);
textViewPersonName.setText(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(1))));
TextView textViewPersonsurName = (TextView) view.findViewById(R.id.surName);
textViewPersonsurName.setText(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(2))));
TextView textViewPersonEnterDate = (TextView) view.findViewById(R.id.date);
textViewPersonEnterDate.setText(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(3))));
TextView textViewPersonEnterTime = (TextView) view.findViewById(R.id.time);
textViewPersonEnterTime.setText(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(4))));
TextView textViewPersonExitDate = (TextView) view.findViewById(R.id.date2);
textViewPersonExitDate.setText(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(5))));
TextView textViewPersonExitTime = (TextView) view.findViewById(R.id.time2);
textViewPersonExitTime.setText(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(6))));
}
}
這是我的名單看起來像： 
然後我單擊列表項目我已經創建的類：
public class Edit extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_edit);
Bundle extras = getIntent().getExtras();
if(extras !=null)
{
int id = extras.getInt("id");
Toast.makeText(getApplicationContext(),
"Position :"+id , Toast.LENGTH_LONG);
}
EditText name = (EditText) findViewById(R.id.name);
EditText surName = (EditText) findViewById(R.id.surName);
EditText date = (EditText) findViewById(R.id.date2);
EditText time = (EditText) findViewById(R.id.time2);
EditText eDate = (EditText) findViewById(R.id.date3);
EditText eTime = (EditText) findViewById(R.id.time3);
}
public void onCancel(View btnCancel){
Intent intent = new Intent (Edit.this,List.class);
startActivity(intent);
}
public void onSave(View btnSave){
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.edit, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
單擊它看起來像後： 
所以，我管理，只需點擊它來獲得id列，但主要的問題是，我想打當我點擊列表項時，所有信息顯示在編輯文本字段中（現在它是空的，因爲我上傳了圖像），並且在點擊添加按鈕後，它更新列表中顯示的SQL表和信息。 List.java存儲我的列表和Edit.java，其中空的編輯字段apear在項目在列表視圖中點擊後。
編輯：CustomCursorAdapter
public class CustomCursorAdapter extends CursorAdapter {
@SuppressWarnings("deprecation")
public CustomCursorAdapter(Context context, Cursor c) {
super(context, c);
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
// when the view will be created for first time,
// we need to tell the adapters, how each item will look
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
View retView = inflater.inflate(R.layout.single_row_item, parent, false);
return retView;
}
@Override
public void bindView(View view, Context context, Cursor cursor) {
// here we are setting our data
// that means, take the data from the cursor and put it in views
TextView textViewPersonName = (TextView) view.findViewById(R.id.name);
textViewPersonName.setText(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(1))));
TextView textViewPersonsurName = (TextView) view.findViewById(R.id.surName);
textViewPersonsurName.setText(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(2))));
TextView textViewPersonEnterDate = (TextView) view.findViewById(R.id.date);
textViewPersonEnterDate.setText(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(3))));
TextView textViewPersonEnterTime = (TextView) view.findViewById(R.id.time);
textViewPersonEnterTime.setText(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(4))));
TextView textViewPersonExitDate = (TextView) view.findViewById(R.id.date2);
textViewPersonExitDate.setText(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(5))));
TextView textViewPersonExitTime = (TextView) view.findViewById(R.id.time2);
textViewPersonExitTime.setText(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(6))));
}
public Person get(int position) {
Cursor cursor = getCursor();
Person person;
if(cursor.moveToPosition(position)) {
person = new Person();
person.name = cursor.getString(cursor.getColumnIndex(PERSON_TABLE_COLUMN_NAME));
person.surname = cursor.getString(cursor.getColumnIndex(PERSON_TABLE_COLUMN_SURNAME));
person.enterDate = cursor.getString(cursor.getColumnIndex(PERSON_TABLE_COLUMN_ENTERDATE));
person.enterTime = cursor.getString(cursor.getColumnIndex(PERSON_TABLE_COLUMN_ENTERTIME));
person.exitDate = cursor.getString(cursor.getColumnIndex(PERSON_TABLE_COLUMN_EXITDATE));
person.exitTime = cursor.getString(cursor.getColumnIndex(PERSON_TABLE_COLUMN_EXITTIME));
}
return person;
}
}
編輯XML：
<EditText
android:id="@+id/username"
android:hint="Name"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</EditText>
<EditText
android:id="@+id/usersurname"
android:hint="Surname"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</EditText>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<EditText
android:id="@+id/date2"
android:hint="Enter date"
android:focusable="false"
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</EditText>
<EditText
android:id="@+id/time2"
android:hint="Enter time"
android:focusable="false"
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</EditText>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<EditText
android:id="@+id/date3"
android:hint="Exit date"
android:focusable="false"
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</EditText>
<EditText
android:id="@+id/time3"
android:hint="Exit time"
android:focusable="false"
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</EditText>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<Button
android:id="@+id/Save"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onClickSave"
android:text="Add" />
<Button
android:id="@+id/Cancel"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="onCancel"
android:text="Cancel" />
</LinearLayout>
</LinearLayout>
EDIT3：
public class Edit extends ActionBarActivity {
EditText name;
EditText surName;
EditText date;
EditText time;
EditText eDate;
EditText eTime;
String data_name;
String data_surname;
String data_enterdate;
String data_entertime;
String data_exitdate;
String data_exittime;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_edit);
Intent intent = getIntent();
data_name = intent.getStringExtra("name");
data_surname = intent.getStringExtra("surname");
data_enterdate= intent.getStringExtra("enterdate");
data_entertime = intent.getStringExtra("entertime");
data_exitdate = intent.getStringExtra("exitdate");
data_exittime = intent.getStringExtra("surname");
name = (EditText) findViewById(R.id.name);
surName = (EditText) findViewById(R.id.surName);
date = (EditText) findViewById(R.id.date2);
time = (EditText) findViewById(R.id.time2);
eDate = (EditText) findViewById(R.id.date3);
eTime = (EditText) findViewById(R.id.time3);
setText();
}
public void setText(){
name.setText(data_name,TextView.BufferType.EDITABLE);
surName.setText(data_surname,TextView.BufferType.EDITABLE);
date.setText(data_enterdate,TextView.BufferType.EDITABLE);
time.setText(data_entertime,TextView.BufferType.EDITABLE);
eDate.setText(data_exitdate,TextView.BufferType.EDITABLE);
eTime.setText(data_exittime,TextView.BufferType.EDITABLE);
}
public void onCancel(View btnCancel){
Intent intent = new Intent (Edit.this,List.class);
startActivity(intent);
}
public void onSave(View btnSave){
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.edit, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
我想你忘了說明問題了嗎？如果你能解釋你在做什麼和沒有發生什麼，那會很好。 – Karthik
我在最後一張圖片後解釋了 – TheDude
簡而言之，我想讓列表視圖項可編輯，稍後更新它:) – TheDude