Android动态添加按钮并监听

记录一下最近在项目的滚动视图里动态添加按钮的实现方法
一 xml的布局
1.主界面contentView的布局

<LinearLayout xmlns:android="[http://schemas.android.com/apk/res/android](http://schemas.android.com/apk/res/android)"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#F3F3F3"
android:orientation="vertical">
   <ScrillView 
          android:layout_width="match_parent"
          android:layout_height="match_parent">
          <LinearLayout
               android:layout_width="match_parent"
               android:layout_height="match_parent"
               android:orientation="vertical">
               //...其它模块
               <LinearLayout
                     android:id="@+id/id_hp_dynamic_btn"
                     android:layout_width="match_parent"
                     android:layout_height="match_parent"
                     android:orientation="vertical"
                     android:background="@color/white_fc"
                  >
               </LinearLayout>
               //...其它模块
           </LinearLayout>
   </ScrillView>
</LinearLayout>

2.新增按钮button的布局

<?xml version="1.0" encoding="utf-8"?>
<Button xmlns:android="[http://schemas.android.com/apk/res/android](http://schemas.android.com/apk/res/android)"
android:id="@+id/id_hp_itembtn"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:textColor="#000000"
android:textSize="12dp"
>
</Button>

二 java文件里实现
1.声明文字数组、图片数组

List<String> temlist = new ArrayList();
List<Integer>funtionModImg = new ArrayList<>;
private LinearLayout contentView

2.获取数据
(注：因为我的数据时动态获取的，这里使用了SharedPreferences来保存List<T>数据，使用方法可以参考Android SharedPreferences保存List<T>数据文章)

SharedPreferences sp = getActivity().getSharedPreferences("xxx",Context.MODE_PRIVATE);
String str = sp.getString("serial","");
if (str != ""){
     Gson gson = new Gson();
     temlist = gson.fromJson(str,new TypeToken<List< String>>(){}.getType());
}
...
//注：项目里的temlist={"DAS","DAS HD","SPECIAL","ME","OBD II","IMMO"};
//temlist对应的图片数组funtionModImg={R.mipmap.hp_obd_icon,R.mipmap.hp_das_icon,R.mipmap.hp_dashd_icon,R.mipmap.hp_special_icon,R.mipmap.hp_me_icon,R.mipmap.hp_obd_icon,R.mipmap.hp_immo_icon};

3.加载布局

contentView = view.findViewById(R.id.id_hp_dynamic_btn);
LinearLayout parentLayout = (LinearLayout)contentView;
int size = temlist.size();
//每行的水平LinearLayout
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.WRAP_CONTENT);
layoutParams.setMargins(0,0,0,0);
ArrayList<Button> childBtns = new ArrayList<>();
//记录加载的按钮个数
int totoalBtn = 0;
//WindowManager方法获取屏幕的宽度
WindowManager wm = (WindowManager) this.getActivity().getSystemService(Context.WINDOW_SERVICE);
int width = wm.getDefaultDisplay().getWidth();
//动态创建按钮
for (int i = 0;i < size ;i++){
    String item = temlist[I];
    String item1 = funtionModImg.get(i);
    Integer item2 = functionModuleTag.get(i);
    LinearLayout.LayoutParams itemParams = new     LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,LinearLayout.LayoutParams.WRAP_CONTENT);
    Button childBtn = (Button)LayoutInflater.from(this.getActivity()).inflate(R.layout.activity_hp_fuction_module,null);
    childBtn.setText(item);
    totoalBtn++;
    //设置每个按钮的宽
    itemParams.width = width/4;
    childBtn.setOnClickListener(new View.OnClickListener() {
         @Override
             public void onClick(View v) {
             int position =(Integer)v.getTag();
             //在这里处理对应按钮事件
             Log.e("TAG", "onClick: position"+position );
             }
    });
    //添加tag值
     childBtn.setTag(i);
     childBtn.setBackgroundColor(255);
     childBtn.setLayoutParams(itemParams);   
     //设置按钮图标
     childBtn.setCompoundDrawablesRelativeWithIntrinsicBounds(0,item1,0,0);
     childBtns.add(childBtn);
      //大于3个的时候换行
      if (totoalBtn > 3){
          LinearLayout horizLL = new LinearLayout(this.getActivity());
          horizLL.setOrientation(LinearLayout.HORIZONTAL);
          horizLL.setLayoutParams(layoutParams);
          for (Button addBtn:childBtns){
               horizLL.addView(addBtn);
          }
          parentLayout.addView(horizLL);
          childBtns.clear();
          totoalBtn = 0;
     }
 }
 //最后一行添加一下
 if (!childBtns.isEmpty()){
     LinearLayout horizLL = new LinearLayout(this.getActivity());
     horizLL.setOrientation(LinearLayout.HORIZONTAL);
     horizLL.setLayoutParams(layoutParams);
     for (Button addBtn:childBtns){
          horizLL.addView(addBtn);
      }
      parentLayout.addView(horizLL);
      childBtns.clear();
      totoalBtn = 0;
 }

三 效果图