package lab.ex1;
import java.util.ArrayList;
import java.util.List;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteQueryBuilder;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TableLayout;
import android.widget.TableRow;
import android.widget.TextView;
import lab.ex1.HospitalDatabase.Patient;
public class DisplayPatient extends HospitalActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.display);
displayData();
}
private void displayData()
{
final List<Integer> myList = new ArrayList<Integer>();
final Intent me = new Intent(DisplayPatient.this,UpdatePatient.class);
final Bundle b = new Bundle();
//Build new Patient
PatientData build = new PatientData();
final TableLayout viewData = (TableLayout)findViewById(R.id.tblDisplay);
SQLiteQueryBuilder queryBuilder = new SQLiteQueryBuilder();
queryBuilder.setTables(Patient.patientTableName);
SQLiteDatabase db = mDatabase.getReadableDatabase();
String asColumnsToReturn[] = {Patient.patientTableName + "." + Patient.ID,
Patient.patientTableName + "." + Patient.firstName,
Patient.patientTableName + "." + Patient.lastName,
Patient.patientTableName + "." + Patient.room,
Patient.patientTableName + "." + Patient.department};
Cursor c = queryBuilder.query(db,asColumnsToReturn,null,null,null,null,Patient.DEFAULT_SORT_ORDER);
if (c.moveToFirst())
{
for (int i=0; i< c.getCount(); i++)
{
final TableRow newRow = new TableRow(this);
Button update = new Button(this);
TextView display = new TextView(this);
display.setTextSize(15);
update.setX(15);
update.setY(10);
update.setTextSize(10);
Button deleteButton = new Button(this);
deleteButton.setX(100);
deleteButton.setY(100);
deleteButton.setTextSize(10);
deleteButton.setText("Delete");
update.setText("Update");
deleteButton.setTag(c.getInt(c.getColumnIndex(Patient.ID)));
update.setTag(c.getInt(c.getColumnIndex(Patient.ID)));
newRow.setTag(c.getInt(c.getColumnIndex(Patient.ID))); // set the tag field on the TableRow view so we know which row to delete
myList.add(c.getInt(c.getColumnIndex(Patient.ID)));
build.setID(Integer.parseInt(c.getString(c.getColumnIndex((Patient.ID)))));
build.setFirstName((c.getString(c.getColumnIndex(Patient.firstName))));
build.setLastName(c.getString(c.getColumnIndex(Patient.lastName)));
build.setDepartment(c.getString(c.getColumnIndex(Patient.department)));
build.setRoom(Integer.parseInt(c.getString(c.getColumnIndex(Patient.room))));
deleteButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Integer id = (Integer) v.getTag();
deletePatient(id);
final TableLayout patientTable = (TableLayout) findViewById(R.id.tblDisplay);
View viewToDelete = patientTable.findViewWithTag(id);
viewData.removeView(viewToDelete);
}
});
update.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
Integer id = (Integer)v.getTag();
final TableLayout patientRmv = (TableLayout)findViewById(R.id.tblDisplay);
for (Integer delete : myList )
{
View viewToDelete = patientRmv.findViewWithTag(delete);
viewData.removeView(viewToDelete);
}
b.putString("key", Integer.toString(id));
me.putExtras(b);
startActivity(me);
}
});
display.setText(build.toString());
newRow.addView(display);
newRow.addView(update);
//newRow.addView(deleteButton);
viewData.addView(newRow);
c.moveToNext();
}
}
else
{
TableRow newRow = new TableRow(this);
TextView noResults = new TextView(this);
noResults.setText("No results to show.");
newRow.addView(noResults);
viewData.addView(newRow);
}
c.close();
db.close();
}
public void deletePatient(Integer id)
{
SQLiteDatabase db = mDatabase.getWritableDatabase();
String astrArgs[] = { id.toString() };
db.delete(Patient.patientTableName, Patient.ID+ "=?",astrArgs );
db.close();
}
}
package lab.ex1;
import lab.ex1.HospitalDatabase.Patient;
import android.content.ContentValues;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
public class UpdatePatient extends HospitalActivity {
Spinner spinner;
TextView update;
String up;
Button check;
EditText entry;
String setPosition;
TextView updateID;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.updatepatient);
check = (Button)findViewById(R.id.btnUpdate);
entry = (EditText)findViewById(R.id.editUpdate);
updateID = (TextView)findViewById(R.id.txtIDUpdate);
Bundle accept = getIntent().getExtras();
up = accept.getString("key","0");
updateID.setText(null);
updateID.setText("ID: " + up);
update = (TextView)findViewById(R.id.txtUpdateMessage);
update.setText(null);
// update.setText(up);
spinner = (Spinner) findViewById(R.id.spnChoice);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
this, R.array.arrFields, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
spinner.setOnItemSelectedListener(new MyOnItemSelectedListener());
check.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
updateDB(entry.getText().toString(),setPosition,up);
}
});
}
public class MyOnItemSelectedListener implements OnItemSelectedListener {
public void onItemSelected(AdapterView<?> adapterView,
View view, int pos, long id) {
update.setText(null);
update.setText("I will update On " + adapterView.getItemAtPosition(pos).toString());
setPosition = adapterView.getItemAtPosition(pos).toString();
}
public void onNothingSelected(AdapterView parent) {
// Do nothing.
}
}
public void updateDB(String valuesToUpdate, String field,String ID)
{
SQLiteDatabase db = mDatabase.getWritableDatabase();
db.beginTransaction();
try
{
ContentValues updatePatient = new ContentValues();
if (field == "First Name")
{
updatePatient.put(Patient.firstName, valuesToUpdate);
String astrArgs[] = { up.toString() };
db.update(Patient.patientTableName,updatePatient, Patient.ID+"=?", astrArgs);
//
db.setTransactionSuccessful();
}
}
finally
{
db.endTransaction();
}
db.close();
Intent me = new Intent(UpdatePatient.this,DisplayPatient.class);
startActivity(me);
}
}
我正在使用 Android SQLite 数据库。在我的显示类中，它从数据库中读取所有条目并将它们与每个条目旁边的更新按钮一起显示。该条目更新按钮的标签具有条目 Patient.ID。当用户单击更新时，他们将被带到更新类，在那里他们可以选择他们想要更新的内容，名字，姓氏，公寓，房间。之后他们点击更新，他们被带回显示类，他们应该看到那里的变化。但是，当它们被取回时，之前的值仍然存在，更改没有显示出来，我错过了什么？