手机安全卫士05_2:程序主界面,为每个条目添加事件
最后更新于:2022-04-01 16:16:19
### 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](https://docs.gechiui.com/gc-content/uploads/sites/kancloud/2016-02-18_56c5a95623df9.jpg "Screenshot_2014-11-04-15-07-55")](http://img.blog.csdn.net/20141104152008738) [![Screenshot_2014-11-04-15-08-05](https://docs.gechiui.com/gc-content/uploads/sites/kancloud/2016-02-18_56c5a95634fb8.jpg "Screenshot_2014-11-04-15-08-05")](http://img.blog.csdn.net/20141104152010127)