I'm creating a small app in which you can add or delete a table row by button click. Whenever I click the "add line" button, the button adds a table row to the layout and does what it's supposed to do. However, the "delete line" doesn't remove the the newly added table row, but it does decrement (int count) like it's supposed to. I've worked and searched on it for about 4 to 5 hours now and I'm having no luck. Here's the code:

```
int count = 0;

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);       
    setContentView(R.layout.activity_main);
    Button buttonAdd = (Button) findViewById(R.id.button1);
    Button buttonDel = (Button) findViewById(R.id.button2);
    buttonAdd.setOnClickListener(this);
    buttonDel.setOnClickListener(this);
}

public void onClick(View v) {
    TableLayout tableLayout1;
    EditText editText1;
    EditText editText2;
    TableRow tempRow;
    EditText tempText1;
    EditText tempText2;
    TableRow tableRow1;

    tableLayout1 = (TableLayout) findViewById(R.id.tableLayout1);
    editText1 = (EditText) findViewById(R.id.editText1);
    editText2 = (EditText) findViewById(R.id.editText2);
    tempRow = new TableRow(MainActivity.this);
    tempText1 = new EditText(MainActivity.this);
    tempText2 = new EditText(MainActivity.this);
    tempText1.setInputType(InputType.TYPE_CLASS_TEXT);
    tempText2.setInputType(InputType.TYPE_NUMBER_FLAG_DECIMAL);
    tableRow1 = (TableRow) findViewById(R.id.tableRow1);

    tempRow.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
    tempText1.setLayoutParams(editText1.getLayoutParams());
    tempText2.setLayoutParams(editText2.getLayoutParams());
    switch(v.getId()){
    case R.id.button1:
        if(count != 9){
            count++;

            tempRow.addView(tempText1);
            tempRow.addView(tempText2);
            tableLayout1.addView(tempRow);
        } else {
            final AlertDialog alertDialog = new AlertDialog.Builder(MainActivity.this).create(); //Read Update
            alertDialog.setTitle("Error");
            alertDialog.setMessage("You can only have 10 rows!");

            alertDialog.setButton("Ok", new DialogInterface.OnClickListener() {
               public void onClick(DialogInterface dialog, int which) {
                  alertDialog.dismiss();
               }
            });

            alertDialog.show();
        }
        break;
    case R.id.button2:
        if(count != 0){
            count--;
            tempRow.removeView(tempText1);
            tempRow.removeView(tempText2);
            tableLayout1.removeView(tempRow);
            //tableLayout1.invalidate();

        } else {
            final AlertDialog alertDialog = new AlertDialog.Builder(MainActivity.this).create(); //Read Update
            alertDialog.setTitle("Error");
            alertDialog.setMessage("You must have at least one row!");

            alertDialog.setButton("Ok", new DialogInterface.OnClickListener() {
               public void onClick(DialogInterface dialog, int which) {
                  alertDialog.dismiss();
               }
            });

            alertDialog.show();
        }
        break;
        default:
            //Do something;
    }

}    

```

.

```
10-30 21:22:23.379: E/AndroidRuntime(3970): FATAL EXCEPTION: main
10-30 21:22:23.379: E/AndroidRuntime(3970): java.lang.NullPointerException
10-30 21:22:23.379: E/AndroidRuntime(3970): at com.android.hopegpacalc.MainActivity.onClick(MainActivity.java:57)
10-30 21:22:23.379: E/AndroidRuntime(3970): at android.view.View.performClick(View.java:3511)
10-30 21:22:23.379: E/AndroidRuntime(3970): at android.view.View$PerformClick.run(View.java:14105)
10-30 21:22:23.379: E/AndroidRuntime(3970): at android.os.Handler.handleCallback(Handler.java:605)
10-30 21:22:23.379: E/AndroidRuntime(3970): at android.os.Handler.dispatchMessage(Handler.java:92)
10-30 21:22:23.379: E/AndroidRuntime(3970): at android.os.Looper.loop(Looper.java:137)
10-30 21:22:23.379: E/AndroidRuntime(3970): at android.app.ActivityThread.main(ActivityThread.java:4424)
10-30 21:22:23.379: E/AndroidRuntime(3970): at java.lang.reflect.Method.invokeNative(Native Method)
10-30 21:22:23.379: E/AndroidRuntime(3970): at java.lang.reflect.Method.invoke(Method.java:511)
10-30 21:22:23.379: E/AndroidRuntime(3970): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
10-30 21:22:23.379: E/AndroidRuntime(3970): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
10-30 21:22:23.379: E/AndroidRuntime(3970): at dalvik.system.NativeStart.main(Native Method)

```