牛骨文教育服务平台(让学习变的简单)

为每个条目添加点击事件监听器

gv_main.setOnItemClickListener(this);

需要当前Activity实现OnItemClickListener接口,同时实现public void onItemClick(AdapterView<?> parent, View view, int position,long id)方法

/**
     * 当gridview的条目被点击的时候对应的回调
     * parent : gridView
     * view : 当前被点击条目的 LinearLayout
     * position : 点击条目对应的位置
     * id : 代表的行号
     */
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position,
            long id) {
        Log.i(TAG, "点击的位置" + position);
        switch(position){
        case 0 :
            Log.i(TAG, "进入手机防盗");
            break;
        }
    }

设置长按“手机防盗”时,弹出编辑窗口(知识点:SharedPreferences)

gv_main.setOnItemLongClickListener(new OnItemLongClickListener() {

            @Override
            public boolean onItemLongClick(AdapterView<?> parent, final View view,
                    int position, long id) {
                if(position == 0){
                    Builder builder = new Builder(MainActivity.this);
                    builder.setTitle("设置");
                    builder.setMessage("请输入要更改的内容");
                   
                    final EditText et = new EditText(MainActivity.this);
                    et.setHint("请输入内容,长度在0-8之间");
                    builder.setView(et);
                   
                    builder.setPositiveButton("确定", new OnClickListener() {
                       
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            String name = et.getText().toString();//获取输入
                            if("".equals(name)){
                                Toast.makeText(getApplicationContext(), "内容不能为空", Toast.LENGTH_LONG).show();
                                return;
                            }else if(name.length() > 8){
                                Toast.makeText(getApplicationContext(), "输入过长", Toast.LENGTH_LONG).show();
                                return;
                            }else{
                                Editor editor = sp.edit();
                                editor.putString("lost_name", name);
                                // 完成数据的提交
                                editor.commit();
                                TextView tv = (TextView) view.findViewById(R.id.tv_main_name);
                                tv.setText(name);
                            }
                        }
                    });
                   
                    builder.setNegativeButton("取消", new OnClickListener() {
                       
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                        }
                    });
                   
                    builder.create().show();
                }
                return false;
            }
           
        });
       
    }

长按后弹出界面效果及设置后的效果:

Screenshot_2014-11-04-15-07-55    Screenshot_2014-11-04-15-08-05