这是json解析的一个小例子，望你们好好理解，升上小实训！好好加油包，骚年们！
json句子：
[
{
"name": "“给我唱首歌”\n“给我讲个故事”"
},
{
"name": "“我想订机票”\n“给我说个新闻”"
},
{
"name": "“给我讲个笑话”\n“来一首李白的静夜思”"
},
{
"name": "“看一下去上海的航班”\n“百科搜索张学友”"
},
{
"name": "“如果嫌我太烦”\n可以对我说“休息去吧”"
}
]
- 依赖
implementation 'com.google.code.gson:gson:2.2.4'//gson
implementation 'com.android.support:design:27.1.1' //防止版本错误
- xml 文件
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<android.support.v7.widget.RecyclerView
android:id="@+id/rlv"
android:layout_width="match_parent"
android:layout_height="match_parent">
</android.support.v7.widget.RecyclerView>
</android.support.constraint.ConstraintLayout>
适配器中的条目布局：
recycler_item.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/tv_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="20dp"
android:text="@string/app_name" />
<View
android:layout_width="match_parent"
android:layout_height="3dp"
android:background="@color/colorPrimary" />
</LinearLayout>
- java文件
bean包下的：
NameBean.java
public class NameBean {
/**
* name : “给我唱首歌”
“给我讲个故事”
*/
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
adapter包下的：
HomeAdapter.java
public class HomeAdapter extends RecyclerView.Adapter<HomeAdapter.ViewHolder> {
private Context mContext;
private List<NameBean> mData;
public HomeAdapter(Context context, List<NameBean> data) {
mContext = context;
mData = data;
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View inflate = LayoutInflater.from(mContext).inflate(R.layout.recycler_item, null);
return new ViewHolder(inflate);
}
@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
NameBean nameBean = mData.get(position);
holder.mText.setText(nameBean.getName());
}
@Override
public int getItemCount() {
return mData.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
private final TextView mText;
public ViewHolder(View itemView) {
super(itemView);
mText = itemView.findViewById(R.id.tv_text);
}
}
}
activity包下的：
MainActivity.java
/*[
{
"name": "“给我唱首歌”\n“给我讲个故事”"
},
{
"name": "“我想订机票”\n“给我说个新闻”"
},
{
"name": "“给我讲个笑话”\n“来一首李白的静夜思”"
},
{
"name": "“看一下去上海的航班”\n“百科搜索张学友”"
},
{
"name": "“如果嫌我太烦”\n可以对我说“休息去吧”"
}
]*/
/*
1. 对象的序列化和反序列化
Type listType = new TypeToken<List<String>>() {}.getType();
List<String> target = new LinkedList<String>();
target.add("blah");
Gson gson = new Gson();
String json = gson.toJson(target, listType);
List<String> target2 = gson.fromJson(json, listType);
*/
public class MainActivity extends AppCompatActivity {
private RecyclerView mRlv;
private static final String TAG = "MainActivity";
private List<NameBean> mList1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initData();
initView();
}
private void initData() {
// 创建Gson解析
Gson gson = new GsonBuilder().serializeNulls().create();
// 设置TypeToken
Type type = new TypeToken<List<NameBean>>() {
}.getType();
// 创建List<NameBean>集合
List<NameBean> list = new ArrayList<>();
// 设置数据
List<String> name = new ArrayList<>();
name.add("“给我唱首歌”\\n“给我讲个故事”");
name.add("“我想订机票”\\n“给我说个新闻”");
name.add("“给我讲个笑话”\\n“来一首李白的静夜思”");
name.add("“看一下去上海的航班”\\n“百科搜索张学友”");
name.add("“如果嫌我太烦”\\n可以对我说“休息去吧”");
// 循环添加数据
for (int i = 0; i < name.size(); i++) {
NameBean nameBean = new NameBean();
nameBean.setName(name.get(i));
list.add(nameBean);
}
// 获取解析的字符串
String s = gson.toJson(list, type);
// 解析出来的集合
mList1 = gson.fromJson(s, type);
}
private void initView() {
// 获取控件对象
mRlv = (RecyclerView) findViewById(R.id.rlv);
// 设置显示方式
mRlv.setLayoutManager(new LinearLayoutManager(this));
// 设置适配器
HomeAdapter adapter = new HomeAdapter(this, mList1);
mRlv.setAdapter(adapter);
}
}
