第一次提交

basicLib/src/main/java/com/azhon/basic/lifecycle/BaseViewModel.java

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+package com.azhon.basic.lifecycle;
+
+import androidx.lifecycle.LifecycleOwner;
+import androidx.lifecycle.MutableLiveData;
+import androidx.lifecycle.Observer;
+import androidx.lifecycle.ViewModel;
+
+import com.azhon.basic.bean.DialogBean;
+
+import io.reactivex.disposables.CompositeDisposable;
+import io.reactivex.disposables.Disposable;
+
+/**
+ * 项目名:    TODO-MVVM
+ * 包名       com.azhon.basic.lifecycle
+ * 文件名:    BaseViewModel
+ * 创建时间:  2019-03-27 on 10:44
+ * 描述:     TODO ViewModel基类，管理rxJava发出的请求，ViewModel销毁同时也取消请求
+ *
+ * @author xuhuixiang
+ */
+
+public abstract class BaseViewModel extends ViewModel {
+
+    /**
+     * 管理RxJava请求
+     */
+    private CompositeDisposable compositeDisposable;
+    /**
+     * 用来通知 Activity／Fragment 是否显示等待Dialog
+     */
+    protected DialogLiveData<DialogBean> showDialog = new DialogLiveData<>();
+    /**
+     * 当ViewModel层出现错误需要通知到Activity／Fragment
+     */
+    protected MutableLiveData<Object> error = new MutableLiveData<>();
+
+    /**
+     * 添加 rxJava 发出的请求
+     */
+    protected void addDisposable(Disposable disposable) {
+        if (compositeDisposable == null || compositeDisposable.isDisposed()) {
+            compositeDisposable = new CompositeDisposable();
+        }
+        compositeDisposable.add(disposable);
+    }
+
+    public void getShowDialog(LifecycleOwner owner, Observer<DialogBean> observer) {
+        showDialog.observe(owner, observer);
+    }
+
+    public void getError(LifecycleOwner owner, Observer<Object> observer) {
+        error.observe(owner, observer);
+    }
+
+    /**
+     * ViewModel销毁同时也取消请求
+     */
+    @Override
+    protected void onCleared() {
+        super.onCleared();
+        if (compositeDisposable != null) {
+            compositeDisposable.dispose();
+            compositeDisposable = null;
+        }
+        showDialog = null;
+        error = null;
+    }
+}