Android:在activity.java中创建CheckBox [英] Android: create CheckBox in activity.java

问题描述

我想在Android应用中创建动态数量的复选框(取决于数组流派"的长度)，然后我做到了:

Hi i want to create dynamical number of checkboxes (it depends on the length of array "genre") in an Android app then i did:

CheckBox [] checkbox;
String [] genre={"party","sport","music","café","education"};

@Override
protected void onCreate(Bundle savedInstanceState) {
    checkbox=new CheckBox[genre.length];
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_checkbox);
    for(int i=0;i<genre.length;i++){
        CheckBox c=new CheckBox(this);
        c.setText(genre[i]);
        checkbox[i]=c;  
    }
     ArrayAdapter<CheckBox>adapter= new ArrayAdapter<CheckBox>(this, android.R.layout.simple_list_item_1,checkbox);
     ListView lv= (ListView)findViewById(R.id.genre_list);
     lv.setAdapter(adapter);
}

但是在列表视图中，它显示了内存中复选框的数量(我想)，为什么?

but in the listview it shows numbers of the checkboxes in memory(I guess), why?

like : Android.wiget.CheckBox@44f03160
       Android.wiget.CheckBox@44f03d60
      ...

推荐答案

您宁愿使用android.R.simple_list_item_checked项布局并在列表上启用多项选择:

You'd rather use the android.R.simple_list_item_checked item layout and enable multiple-choice on the list:

String [] genre={"party","sport","music","café","education"};

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_checkbox);
    ArrayAdapter<String> adapter= new ArrayAdapter<String>(this, android.R.layout.simple_list_item_checked, genre);
    ListView lv= (ListView)findViewById(R.id.genre_list);
    lv.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
    lv.setAdapter(adapter);
}

通过这种方式，您不必自己手动创建复选框

This way you don't have to create the checkboxes manually by yourself

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