我的SQLite数据库中有一个表，它分别有三种数据类型整数，整数，文本。编辑文本是根据table.now中的列动态创建的。现在我想对每个文本框进行验证，就像我输入整数数据类型的字符串值一样，然后会显示一个弹出窗口显示消息＆＃34;不能插入数据类型的文本值整数＆＃34 ;.那我现在该怎么办。
public class DisplayTable_Grid extends Activity
{
TableLayout table_layout;
SQL_crud sqlcon;
TableRow rw;
TextView gettxt_onLongclik;
ArrayList<String> storeColumnNames;
EditText enter_text;
TextView set_txt;
List<EditText> allEds = new ArrayList<EditText>();
ArrayList<String> storeallEds=new ArrayList<String>();
ArrayList<String> storeEditextText=new ArrayList<String>();
List<TextView> textViewlst = new ArrayList<TextView>();
ArrayList<String> getColumnNames=new ArrayList<String>();
ArrayList<HashMap<String, String>> arraylist = new ArrayList<HashMap<String, String>>();
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.displaytable);
sqlcon = new SQL_crud(this);
table_layout = (TableLayout) findViewById(R.id.diplay_table);
BuildTable();
}
private void BuildTable()
{
sqlcon.open();
storeColumnNames=sqlcon.getColumnNames(DisaplayTables_list.getTableNameFromListView.toString());
Cursor c = sqlcon.readEntryofTable(DisaplayTables_list.getTableNameFromListView.toString());
int rows = c.getCount();
int cols = c.getColumnCount();
String colN=c.getColumnNames().toString();
arraylist=sqlcon.readColumn_Datatypes(DisaplayTables_list.getTableNameFromListView.toString ());
ArrayList<String> colName=new ArrayList<String>();
colName=sqlcon.getColumnNames(DisaplayTables_list.getTableNameFromListView.toString());
//colName.add(colN);
c.moveToFirst();
System.out.println("size of hash map:"+arraylist.size());
for(int k=0;k<1;k++)
{
TableRow rowcolumnName = new TableRow(this);
rowcolumnName.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.WRAP_CONTENT));
rowcolumnName.setBackgroundColor(Color.GRAY);
for(int a=0;a<cols/*arraylist.size()*/;a++)
{
TextView columnName = new TextView(this);
columnName.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,
LayoutParams.WRAP_CONTENT));
columnName.setGravity(Gravity.CENTER);
columnName.setTextSize(18);
columnName.setPadding(0, 5, 0, 5);
columnName.setText(colName.get(a)+" "+arraylist.get(a).toString());
rowcolumnName.addView(columnName);}
table_layout.addView(rowcolumnName);
// c.moveToNext();
}
// outer for loop
if(rows==0)
{
Toast.makeText(getApplicationContext(), "rows not found..cant build table", Toast.LENGTH_LONG);
}
else{
for (int i = 0; i < rows; i++)
{
TableRow row = new TableRow(this);
row.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.WRAP_CONTENT));
// inner for loop
for (int j = 0; j < cols; j++)
{
TextView tv = new TextView(this);
tv.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT));
tv.setGravity(Gravity.CENTER);
tv.setTextSize(18);
tv.setPadding(0, 5, 0, 5);
tv.setText(c.getString(j));
row.addView(tv);
}
row.setClickable(true);
row.requestFocus();
row.setOnLongClickListener(new OnLongClickListener()
{
@Override
public boolean onLongClick(View viewlong)
{
rw=(TableRow) viewlong;
gettxt_onLongclik=(TextView)rw.getChildAt(0);
Toast.makeText(getApplicationContext(),gettxt_onLongclik.getText().toString(),Toast.LENGTH_SHORT).show();
final AlertDialog.Builder alertForSelectOperation=new AlertDialog.Builder(DisplayTable_Grid.this);
final LinearLayout linear=new LinearLayout(DisplayTable_Grid.this);
linear.setOrientation(LinearLayout.VERTICAL);
//TextView update=(TextView)new TextView(DisplayTable_Grid.this);
Button update=(Button)new Button(DisplayTable_Grid.this);
//update.setBackgroundColor(Color.rgb(3,12,90));
update.setText(Html.fromHtml("<font size=10>Update</font>"));
update.setOnClickListener(new OnClickListener()
{ @Override
public void onClick(View arg0)
{
final AlertDialog.Builder alertDialogOK_CANCEL=new AlertDialog.Builder(DisplayTable_Grid.this);
final LinearLayout linearlayout=new LinearLayout(DisplayTable_Grid.this);
linearlayout.setOrientation(LinearLayout.VERTICAL);
sqlcon.open();
getColumnNames=sqlcon.getColumnNames(DisaplayTables_list.getTableNameFromListView.toString());
Cursor crs=sqlcon.readColumnCnt(DisaplayTables_list.getTableNameFromListView.toString());
int count=crs.getColumnCount();
Cursor cr=sqlcon.getSinlgeEntryof_table(DisaplayTables_list.getTableNameFromListView.toString(),getColumnNames.get(0), gettxt_onLongclik.getText().toString());
cr.moveToFirst();
for(int i=0;i<count;i++)
{ //add edittext to arralist
enter_text=new EditText(DisplayTable_Grid.this);
allEds.add(enter_text);
allEds.get(i).setText(cr.getString(cr.getColumnIndex(getColumnNames.get(i))));
linearlayout.addView(enter_text);
}
sqlcon.close();
//finish();
alertDialogOK_CANCEL.setPositiveButton("Update", new DialogInterface.OnClickListener()
{ @Override
public void onClick(DialogInterface arg0, int arg1)
{
for(int i=0;i<allEds.size();i++)
{
//System.out.println(allEds.get(i).getText().toString());
storeallEds.add(allEds.get(i).getText().toString());
String getarraylist=arraylist.get(i).toString();
String datatype_text="{datatype=text}";
String datatype_integer="{datatype=integer}";
if(getarraylist.equals(datatype_text) || getarraylist.equals(datatype_integer))
{
if(getarraylist.equals(datatype_text))
{
Toast.makeText(getApplicationContext(), "text"+storeallEds.get(i),Toast.LENGTH_LONG).show();
//enter_text.setInputType(InputType.TYPE_CLASS_TEXT);
}
else if(getarraylist.equals(datatype_integer))
{
if(storeallEds.get(i).contains("a"))//allEds.get(i).getText().toString().contains("a")||allEds.get(i).getText().toString().contains("b"))
{
Toast.makeText(getApplicationContext(), "String in integer value",Toast.LENGTH_LONG).show();
//enter_text.setInputType(InputType.TYPE_CLASS_NUMBER);
}
else
{
//storeallEds.add(allEds.get(i).getText().toString());
Toast.makeText(getApplicationContext(), "integer"+storeallEds.get(i),Toast.LENGTH_LONG).show();
}
}
else
{
Toast.makeText(getApplicationContext(), "no datatype found",Toast.LENGTH_LONG).show();
}
}
}
//System.out.println(storeallEds);
sqlcon.open();
try
{
sqlcon.updateRecord(DisaplayTables_list.getTableNameFromListView.toString(), gettxt_onLongclik.getText().toString(), storeallEds);
}
catch(Exception e)
{
Toast.makeText(getApplicationContext(),"Can't Update column already exists ",Toast.LENGTH_LONG).show();
}
Intent i=new Intent(getApplicationContext(),DisplayTable_Grid.class);
startActivity(i);
sqlcon.close();
}
});
alertDialogOK_CANCEL.setNegativeButton("Cancel", new DialogInterface.OnClickListener()
{ @Override
public void onClick(DialogInterface dialog, int arg1)
{
dialog.dismiss();
}
});
alertDialogOK_CANCEL.setView(linearlayout);
alertDialogOK_CANCEL.setTitle("insert values here");
alertDialogOK_CANCEL.create();
alertDialogOK_CANCEL.show();
}
});
//TextView delete=(TextView)new TextView(DisplayTable_Grid.this);
Button delete=(Button)new Button(DisplayTable_Grid.this);
delete.setText(Html.fromHtml("<font size=10> Delete</font>"));
//delete.setBackgroundColor(Color.rgb(3,12,90));
delete.setOnClickListener(new OnClickListener()
{ @Override
public void onClick(View arg0)
{
final AlertDialog.Builder alertDialogOK_CANCEL=new AlertDialog.Builder(DisplayTable_Grid.this);
alertDialogOK_CANCEL.setMessage("Press OK to Delete this Record");
alertDialogOK_CANCEL.setPositiveButton("OK", new DialogInterface.OnClickListener()
{ @Override
public void onClick(DialogInterface arg0, int arg1)
{
sqlcon.open();
sqlcon.deleteEntry(DisaplayTables_list.getTableNameFromListView, storeColumnNames.get(0), gettxt_onLongclik.getText().toString());
sqlcon.close();
Intent i=new Intent(getApplicationContext(),DisplayTable_Grid.class);
startActivity(i);
}
});
alertDialogOK_CANCEL.setNegativeButton("CANCEL",new DialogInterface.OnClickListener()
{ @Override
public void onClick(DialogInterface dialog, int arg1)
{
dialog.dismiss();
}
});
alertDialogOK_CANCEL.create();
alertDialogOK_CANCEL.show();
}
});
//TextView insert=(TextView)new TextView(DisplayTable_Grid.this);
Button insert=(Button)new Button(DisplayTable_Grid.this);
insert.setText(Html.fromHtml("<font size=10>Insert</font>"));
//insert.setBackgroundColor(Color.rgb(3,12,90));
insert.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View arg0)
{
final AlertDialog.Builder alertDialog=new AlertDialog.Builder(DisplayTable_Grid.this);
final LinearLayout linearlayout=new LinearLayout(DisplayTable_Grid.this);
linearlayout.setOrientation(LinearLayout.VERTICAL);
sqlcon.open();
getColumnNames=sqlcon.getColumnNames(DisaplayTables_list.getTableNameFromListView);
Cursor crs=sqlcon.readColumnCnt(DisaplayTables_list.getTableNameFromListView);
int count=crs.getColumnCount();
for(int i=0;i<count;i++)
{ //add edittext to arralist
enter_text=new EditText(DisplayTable_Grid.this);
allEds.add(enter_text);
String getarraylist=arraylist.get(i).toString();
String datatype_text="{datatype=text}";
String datatype_integer="{datatype=integer}";
if(getarraylist.equals(datatype_text))
{
Toast.makeText(getApplicationContext(), "text",Toast.LENGTH_LONG).show();
enter_text.setInputType(InputType.TYPE_CLASS_TEXT);
}
else if(getarraylist.equals(datatype_integer))
{
Toast.makeText(getApplicationContext(), "integer",Toast.LENGTH_LONG).show();
//enter_text.setInputType(InputType.TYPE_CLASS_NUMBER);
}
else
{
Toast.makeText(getApplicationContext(), "no datatype found",Toast.LENGTH_LONG).show();
}
//add textview to ayyalist
set_txt=new TextView(DisplayTable_Grid.this);
set_txt.setText(getColumnNames.get(i));
set_txt.setTextSize(15);
textViewlst.add(set_txt);
linearlayout.addView(set_txt);
linearlayout.addView(enter_text);
}
sqlcon.close();
alertDialog.setPositiveButton("Insert", new DialogInterface.OnClickListener()
{
@Override
public void onClick(DialogInterface arg0, int arg1)
{
if(allEds.size()==0)
{Toast.makeText(getApplicationContext(), "value not found",Toast.LENGTH_LONG).show();}
else
{
for(int i=0; i < allEds.size(); i++)
{ storeEditextText.add(allEds.get(i).getText().toString());
System.out.println("show gettext: "+storeEditextText.get(i).toString());
String getarraylist=arraylist.get(i).toString();
String datatype_text="{datatype=text}";
String datatype_integer="{datatype=integer}";
if(getarraylist.equals(datatype_text))
{
Toast.makeText(getApplicationContext(), "text",Toast.LENGTH_LONG).show();
}
else if(getarraylist.equals(datatype_integer))
{
Toast.makeText(getApplicationContext(), "integer",Toast.LENGTH_LONG).show();
if(storeEditextText.contains("a")||storeEditextText.contains("b"))
{
try
{
int edittxtint=Integer.parseInt(allEds.get(i).getText().toString());//enter_text.setInputType(InputType.TYPE_CLASS_NUMBER);
}
catch(Exception e)
{
System.out.println("exception....."+e);
Toast.makeText(getApplicationContext(),"value must be an integer",Toast.LENGTH_LONG).show();
}
}
}
else
{
Toast.makeText(getApplicationContext(), "no datatype found",Toast.LENGTH_LONG).show();
}
}
if(storeEditextText.size()==0)
{Toast.makeText(getApplicationContext(), "Text is empty",Toast.LENGTH_LONG).show();}
else
{
sqlcon.open();
try
{sqlcon.insert(DisaplayTables_list.getTableNameFromListView,storeEditextText);}
catch(Exception e)
{Toast.makeText(getApplicationContext(),"emp_id is Primary key", Toast.LENGTH_LONG).show();
Toast.makeText(getApplicationContext(),"column value already exists",Toast.LENGTH_LONG).show();}
System.out.println("size of storeEdittext="+storeEditextText.size());
System.out.println("size of Edit Texts: "+allEds.size());
}
Intent i=new Intent(getApplicationContext(),DisplayTable_Grid.class);
startActivity(i);
sqlcon.close();
}
}
});
alertDialog.setView(linearlayout);
alertDialog.setTitle("insert values here");
alertDialog.create();
alertDialog.show();
}
});
linear.addView(insert);
linear.addView(update);
linear.addView(delete);
alertForSelectOperation.setView(linear);
alertForSelectOperation.setTitle("perform operations here");
alertForSelectOperation.create();
alertForSelectOperation.show();
alertForSelectOperation.setCancelable(true);
return false;
}
});
row.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
TableRow rw=(TableRow) v;
TextView gettxt=(TextView)rw.getChildAt(0);
Toast.makeText(getApplicationContext(), gettxt.getText().toString(),Toast.LENGTH_SHORT).show();
}
});
c.moveToNext();
table_layout.addView(row);
}
}//end of else for null rows
sqlcon.close();
}
}
答案 0 :(得分：0)
您可以修改表格定义并添加＆＃34; CHECK＆＃34;约束，像这样：
CREATE TABLE tab (
column1 INTEGER CHECK(typeof(column1) == "integer"),
column2 INTEGER CHECK(typeof(column2) == "integer"),
column3 TEXT CHECK(typeof(column3) == "text")
);
这将使您的数据库能够对此表强制执行数据类型检查。这会稍微减慢这个表上的插入/更新速度。