Android(安卓)mvvm使用实战

本编文章简单使用databinding，给刚入门的同学学习mvvm借鉴
进入正题

//在gradle android下加入dataBinding {        enabled = true}

.xml中包含常见控件还有recycleview

                        type="com.renli.mvvmdemo.been.UserInfo" />

activity中

public class MvvmMainActivity extends Activity {    private ActivityMvvmMainBinding binding;    UserInfo userInfo = new UserInfo();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        binding = DataBindingUtil.setContentView(this, R.layout.activity_mvvm_main);        userInfo.setName("阿萌");        userInfo.setAge(20);        userInfo.setSex("男");        userInfo.setDetail("深圳");        userInfo.setIconUrl("https://网上图片连接.jpg");        userInfo.setPlaceUrl(R.drawable.bm_list);        binding.setUserInfo(userInfo);        binding.setClick(this);        ArrayList mList = new ArrayList<>();        mList.add(userInfo);        mList.add(userInfo);        UserAdapter adapter = new UserAdapter(this, mList);        LinearLayoutManager manager = new LinearLayoutManager(this);        manager.setOrientation(LinearLayoutManager.VERTICAL);        binding.rvUser.setLayoutManager(manager);        binding.rvUser.setAdapter(adapter);    }    /**     * 点击事件     * @param view     */    public void btClick(View view){        //数据源改变更新UI        userInfo.setName("阿金金");        userInfo.setAge(30);    }    @BindingAdapter({"imagesUrl", "placeUrl"})//必须静态方法    public static void image(ImageView view, String iconUrl, Drawable placeUrl){        Glide.with(view.getContext()).load(iconUrl).placeholder(placeUrl).error(R.mipmap.agent_icon).into(view);    }    public void onCheckedChanged(View view, boolean isChecked){        binding.setIsShow(isChecked);    }}

定义ViewHolder

public class BindingViewHolder extends RecyclerView.ViewHolder {    private T mBinding;    public BindingViewHolder(@NonNull T binding) {        super(binding.getRoot());        mBinding = binding;    }    public T getBinding(){        return mBinding;    }}

adapter中

public class UserAdapter extends RecyclerView.Adapter {    private LayoutInflater inflater;    private ArrayList mList = new ArrayList<>();    public UserAdapter(Activity activity, ArrayList list){        mList = list;        inflater = LayoutInflater.from(activity);    }    @NonNull    @Override    public BindingViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {        ViewDataBinding binding = DataBindingUtil.inflate(inflater, R.layout.activity_mvvm_main_item, parent, false);        return new BindingViewHolder(binding);    }    @Override    public void onBindViewHolder(@NonNull BindingViewHolder holder, int position) {        ViewDataBinding binding = holder.getBinding();        binding.setVariable(BR.userItem, mList.get(position));        binding.executePendingBindings();//让数据立即生效        holder.itemView.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {            }        });    }    @Override    public int getItemCount() {        return mList.size();    }}

adapter中的xml

UserInfo实体类

public class UserInfo extends BaseObservable {    @Bindable    private String name;    @Bindable    private int age;    @Bindable    private String sex;    @Bindable    private String detail;    @Bindable    private String iconUrl;    @Bindable    private int placeUrl;    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;        notifyPropertyChanged(BR.name);    }    public int getAge() {        return age;    }    public void setAge(int age) {        this.age = age;        notifyPropertyChanged(BR.age);    }    public String getSex() {        return sex;    }    public void setSex(String sex) {        this.sex = sex;        notifyPropertyChanged(BR.sex);    }    public String getDetail() {        return detail;    }    public void setDetail(String detail) {        this.detail = detail;        notifyPropertyChanged(BR.detail);    }    public String getIconUrl() {        return iconUrl;    }    public void setIconUrl(String iconUrl) {        this.iconUrl = iconUrl;        notifyPropertyChanged(BR.iconUrl);    }    public int getPlaceUrl() {        return placeUrl;    }    public void setPlaceUrl(int placeUrl) {        this.placeUrl = placeUrl;        notifyPropertyChanged(BR.placeUrl);    }}

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