Account.java
public class Account {
String name;
int level;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getLevel() {
return level;
}
public void setLevel(int level) {
this.level = level;
}
}
MCallBack.java
public interface MCallback {
public void onSuccess(Account account);
public void onFailed();
}
MVVMActivity.java
public class MVVMActivity extends AppCompatActivity {
private ActivityMvvmBinding binding;
private MVVMViewModel mvvmViewModel;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
binding = DataBindingUtil.setContentView(this,R.layout.activity_mvvm);
mvvmViewModel = new MVVMViewModel(getApplication(),binding);
binding.setViewModel(mvvmViewModel); //初始化viewModel
}
}
MVVMModel.java
public class MVVMModel {
//模拟查询账号数据
public void getAccountData(String accountName, MCallback callback){
Random random = new Random();
boolean isSuccess = random.nextBoolean();
if(isSuccess){
Account account = new Account();
account.setName(accountName);
account.setLevel(100);
callback.onSuccess(account);
}else {
callback.onFailed();
}
}
}
MVVMViewModel.java
public class MVVMViewModel extends BaseObservable {
private ActivityMvvmBinding binding;
private MVVMModel mvvmModel;
private String Input;
private String result;
@Bindable
public String getResult() {
return result;
}
public void setResult(String result) {
this.result = result;
notifyPropertyChanged(com.example.mvvmdemo2.BR.result);
}
// 一般需要传入Application对象，方便在ViewModel中使用application
// 比如sharedpreferences需要使用
public MVVMViewModel(Application application, ActivityMvvmBinding binding) {
this.binding=binding;
mvvmModel = new MVVMModel();
}
public void getData(View view){
Input = binding.etAccount.getText().toString();
mvvmModel.getAccountData(Input, new MCallback() {
@Override
public void onSuccess(Account account) {
String info = account.getName() + “|” + account.getLevel();
setResult(info);
}
@Override
public void onFailed() {
setResult(“消息获取失败”);
}
});
}
}
activity_mvvm.xml
<?xml version="1.0" encoding="utf-8"?><layout 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”>
<variable
name=“viewModel”
type=“com.example.mvvmdemo2.mvvm.MVVMViewModel” />
</
data>
<LinearLayout
android:layout_width=“match_parent”
android:layout_height=“match_parent”
tools:context=".mvvm.MVVMActivity"
android:orientation=“vertical”
android:gravity=“center”>
<EditText
android:id="@+id/et_Account"
android:layout_width=“match_parent”
android:layout_height=“wrap_content”
android:hint=“请输入账户名称”
android:layout_marginBottom=“50dp”
/>
<Button
ontext=".mvvm.MVVMActivity"
android:orientation=“vertical”
android:gravity=“center”>
<EditText
android:id="@+id/et_Account"
android:layout_width=“match_parent”
android:layout_height=“wrap_content”
android:hint=“请输入账户名称”
android:layout_marginBottom=“50dp”
/>
<Button
