混淆if-else语句

Question

ok, i get a little bit confused on the if-else statement . I have 4 row in my table layout and each row will be checked to see whether it has value or not.

Case 1

public void onClick(DialogInterface dialog, int ii) 
{
    if ((i != null && i.trim().length() > 0))
    {
        WD.insertWorkDetails(a1, W1, P1, b, c);  //row 1
        WD.insertWorkDetails(a2, W2, P2, d, e1); //row 2
        WD.insertWorkDetails(a3, W3, P3, f, g);  //row 3
        WD.insertWorkDetails(a4, W4, P4, h, i);  //row 4
        ts.insertTimeSheet(name, weather, date, status, b, i);
        WF.insertWorkForce(subContractors, noPeople, noHours);
        Toast.makeText(getApplicationContext(), "4 Row has value", Toast.LENGTH_LONG).show();
    }
    else if (TextUtils.isEmpty(i) && (g != null && g.trim().length() > 0))
    {
        if ((TextUtils.isEmpty(W4)) && (TextUtils.isEmpty(P4)) && (TextUtils.isEmpty(h)) && (TextUtils.isEmpty(i)))
        {
             WD.insertWorkDetails(a1, W1, P1, b, c);
             WD.insertWorkDetails(a2, W2, P2, d, e1);
             WD.insertWorkDetails(a3, W3, P3, f, g);
             ts.insertTimeSheet(name, weather, date, status, b, g);
             WF.insertWorkForce(subContractors, noPeople, noHours);
             Toast.makeText(getApplicationContext(), "Row 4 no value", Toast.LENGTH_LONG).show();
         } 
         else
         {
             database = dbHelper.getWritableDatabase();
             WD.insertWorkDetails(a1, W1, P1, b, c);
             WD.insertWorkDetails(a2, W2, P2, d, e1);
             WD.insertWorkDetails(a3, W3, P3, f, g);
             WD.insertWorkDetails(a4, W4, P4, h, i);
             ts.insertTimeSheet(name, weather, date, status, b, g);
             WF.insertWorkForce(subContractors, noPeople, noHours);
             Toast.makeText(getApplicationContext(), " All Row has value ", 
             Toast.LENGTH_LONG).show();
              }
}

In case 1, g!=null and w4 holds a value, but I get Row 4 no value which suppose to return All Row has value . Why?

Case 2

else if (TextUtils.isEmpty(i) && (TextUtils.isEmpty(g) && (TextUtils.isEmpty(e1)) && (c != null && c.trim().length() > 0)))
{
    if ((TextUtils.isEmpty(W4)) && (TextUtils.isEmpty(P4))
        && (TextUtils.isEmpty(h)) && (TextUtils.isEmpty(i))
        && ((TextUtils.isEmpty(W3)) && (TextUtils.isEmpty(P3))
        && (TextUtils.isEmpty(f)) && (TextUtils.isEmpty(g))) 
        && ((TextUtils.isEmpty(W2))  && (TextUtils.isEmpty(P2))
        && (TextUtils.isEmpty(d)) && (TextUtils.isEmpty(e1))))
    {
        ts.insertTimeSheet(name, weather, date, status, b, c);
        WF.insertWorkForce(subContractors, noPeople, noHours);
        WD.insertWorkDetails(a1, W1, P1, b, c);
        Toast.makeText(getApplicationContext(), "Row 1 has value only",  Toast.LENGTH_LONG).show();
    } 
    else if ((W4 != null && W4.trim().length() > 0)) 
    {
        WD.insertWorkDetails(a1, W1, P1, b, c);
        WD.insertWorkDetails(a2, W2, P2, d, e1);
        WD.insertWorkDetails(a3, W3, P3, f, g);
        WD.insertWorkDetails(a4, W4, P4, h, i);
        ts.insertTimeSheet(name, weather, date, status, c, b);
        WF.insertWorkForce(subContractors, noPeople, noHours);
        Toast.makeText(getApplicationContext(), "All row have value", Toast.LENGTH_LONG).show();
         }
}

In case 2, c and W4!=null , but I get row 1 has value only .

Answer 1

At least there must be to closing braces at the end of your code.

Anyway, I see this structure of if-s:

if(...condition-1...) {
  ...code-1...
} esle if(...condition-2...) {
  if(...condition-3...){
    ...code-3...
  } else {
    ...code-4...
  }
}

Maybe You want "else" with code-4 to refer to "if" with condition-2, not to "if" with condition-3? Then You would change the structure in this way (additional } before else):

if(...condition-1...) {
  ...code-1...
} esle if(...condition-2...) {
  if(...condition-3...){
    ...code-3...
  } 
} else {
  ...code-4...
}

Answer 2

I think, There is no issue with if-else statement. May be, you are getting empty string with length > 0. TextUtils.isEmpty() : Returns true if the string is null or 0-length. http://developer.android.com/reference/android/text/TextUtils.html#isEmpty(java.lang.CharSequence)