"Side do project side learn Android" mobile Security defender 05_2: Program main interface, add events for each entry

Add a click event listener for each entry

Gv_main.setonitemclicklistener (this);

The current activity is required to implement the Onitemclicklistener interface while implementing the public void Onitemclick (adapterview<?> parent, view view, int position, Long id) method

/**     * When the GridView entry is clicked the corresponding callback     * Parent:gridview     * View: The currently clicked Entry LinearLayout     * Position: Click on the entry corresponding to the location 
   * ID: The line number represented by     *    /@Override public    void Onitemclick (adapterview<?> parent, view view, int position,< C8/>long ID) {        log.i (TAG, "click position" + position);        Switch (position) {case        0:            log.i (TAG, "Enter mobile phone anti-theft");            break;        }    }

When setting long press "phone anti-theft", pop up the edit window (Knowledge point: Sharedpreferences)

Gv_main.setonitemlongclicklistener (New Onitemlongclicklistener () {@Override public boolean Onitemlo Ngclick (adapterview<?> parent, final view view, int position, long id) {if (Positi                    on = = 0) {Builder builder = new Builder (mainactivity.this);                    Builder.settitle ("Settings");                                       Builder.setmessage ("Please enter what you want to change");                    Final EditText et = new EditText (mainactivity.this);                    Et.sethint ("Please input content, length between 0-8");                                       Builder.setview (ET);                        Builder.setpositivebutton ("OK", new Onclicklistener () {@Override public void OnClick (Dialoginterface dialog, int which) {String name = Et.gettext ( ). toString ();//Gets the input if ("". Equals (name)) {Toast.maketext (GetappLicationcontext (), "Content cannot be empty", Toast.length_long). Show ();                            Return }else if (Name.length () > 8) {toast.maketext (Getapplicationcontext (), "input too long", toast.lengt                                H_long). Show ();                            Return                                }else{Editor editor = Sp.edit ();                                Editor.putstring ("Lost_name", name);                                Complete the submission of data editor.commit ();                                TextView TV = (TextView) View.findviewbyid (r.id.tv_main_name);                            Tv.settext (name);                                       }                        }                    });                        Builder.setnegativebutton ("Cancel", new Onclicklistener () {@Override  public void OnClick (Dialoginterface dialog, int which) {                      }                    });                Builder.create (). Show ();            } return false;           }                   }); }

After long press the effect of pop-up interface and after setting:

"Side do project side learn Android" mobile Security defender 05_2: Program main interface, add events for each entry