New controls in Android activity

Knowing the 5 layouts, we'll find that these layouts are static, how do you get the system to automatically generate controls? That would require activity to help.

Today we're talking about creating a new layout with activity.

Use the case to say it!

Implement an input row and column to automatically generate a table and create a background color

Effect

　　　　

The code is as follows:

　　

<?xml version= "1.0" encoding= "Utf-8"? ><linearlayout xmlns:android= "Http://schemas.android.com/apk/res/android"Android:layout_width= "Match_parent"Android:layout_height= "Match_parent"android:orientation= "Vertical" > <LinearLayout android:layout_width= "Match_parent"Android:layout_height= "Wrap_content"android:orientation= "Vertical" > <EditText Android:id= "@+id/text_row"Android:layout_width= "Match_parent"Android:layout_height= "Wrap_content"android:layout_gravity= "Left|top"Android:ems= "10"Android:hint= "@string/text_row"Android:inputtype= "number" > <requestfocus/> </EditText> <EditText Android:id= "@+id/text_column"Android:layout_width= "Match_parent"Android:layout_height= "Wrap_content"android:layout_gravity= "Left|top"Android:ems= "10"Android:hint= "@string/text_column"Android:inputtype= "Number"/> <Button Android:id= "@+id/btn_commit"Android:layout_width= "Match_parent"Android:layout_height= "Wrap_content"android:layout_gravity= "Center_vertical|center_horizontal"Android:text= "@string/btn_commit"/> </LinearLayout> <tablelayout android:layout_weight= "1"Android:id= "@+id/tablelayout"Android:layout_width= "Match_parent"Android:layout_height= "Wrap_content" > </TableLayout></LinearLayout>

1  Packagecom.example.linearlayout;2 3 Importandroid.app.Activity;4 ImportAndroid.graphics.Color;5 ImportAndroid.os.Bundle;6 ImportAndroid.view.Menu;7 ImportAndroid.view.MenuItem;8 ImportAndroid.view.View;9 ImportAndroid.view.View.OnClickListener;Ten ImportAndroid.widget.Button; One Importandroid.widget.LinearLayout; A Importandroid.widget.TableLayout; - ImportAndroid.widget.TableRow; - ImportAndroid.widget.TextView; the ImportAndroid.widget.Toast; -  -  -  Public classMainactivityextendsActivity { +     PrivateTextView Text_column; -     PrivateTextView Text_row; +     Privatetablelayout Tablay; A     Private intLength = 64; at @Override -     protected voidonCreate (Bundle savedinstancestate) { -         Super. OnCreate (savedinstancestate); - Setcontentview (R.LAYOUT.LAYOUT2); -Get Control button -Button Btn_commit =(Button) Findviewbyid (r.id.btn_commit); in        
Get Control TextView -Text_column =(TextView) Findviewbyid (r.id.text_column); totext_row=(TextView) Findviewbyid (r.id.text_row); +             -Set a click event for a button theBtn_commit.setonclicklistener (NewOnclicklistener () { *  $ @OverridePanax Notoginseng              Public voidOnClick (View v) { -                   　　 

Get text value theString column =Text_column.gettext (). toString (). Trim (); +String row =Text_row.gettext (). toString (). Trim (); ADetermines whether the empty the                    if(Column.length ()! = 0 && row.length ()! = 0){ +Get Control layout -tablay=(tablelayout) Findviewbyid (r.id.tablelayout); $                         $Clear first. - tablay.removeallviewsinlayout (); -Tablay.setstretchallcolumns (true); theStrong Turn integral type -                         intX =integer.parseint (Text_column.gettext (). toString ());//??Wuyi                         inty =Integer.parseint (Text_row.gettext (). toString ()); the                          -                          WuFor loop nesting -                              for(intm = 0; M < y; m++ ){ About                                  $TableRow TR =NewTableRow (mainactivity. This); -                                  -                                     for(intn = 0; n < x; n++ ){ -                                         ATextView TV =NewTextView (mainactivity. This); +                                         the                                        //Tv.settext ("(" +n+ "," +m+ ")"); -Tv.settext (""); $ Tr.addview (TV); theGet parameters, set background color values the                                            intresult = M*n +2*n-1; the                                            intRed = RESULT/16/16 ; the                                            intGreen = (result-red*16*16)/16; -                                            intBlue = result-red*16*16-green*16; in                                             theTv.setbackgroundcolor (Color.rgb (red*16, green*16, blue*16)); the                                             About                                             the                                    } the Tablay.addview (TR); the                                +                             } -                               the}Else{BayiToast.maketext (mainactivity. This, "Please enter rows and columns", 1). Show (); the                 } the             }     -        }); -         the     } the}

　　　　

New controls in Android activity