最高优先级任务功能实现，demo修改

app/src/main/java/com/arialyy/simple/base/BaseActivity.java

@@ -18,15 +18,21 @@ package com.arialyy.simple.base;
 
 import android.databinding.ViewDataBinding;
 import android.os.Bundle;
-import android.os.PersistableBundle;
+import android.support.v7.widget.Toolbar;
+import android.view.MenuItem;
+import butterknife.Bind;
 import com.arialyy.frame.core.AbsActivity;
 import com.arialyy.frame.util.AndroidVersionUtil;
 import com.arialyy.simple.R;
+import com.arialyy.simple.common.MsgDialog;
 
 /**
  * Created by Lyy on 2016/9/27.
  */
-public abstract class BaseActivity<VB extends ViewDataBinding> extends AbsActivity<VB> {
+public abstract class BaseActivity<VB extends ViewDataBinding> extends AbsActivity<VB>
+    implements Toolbar.OnMenuItemClickListener {
+
+  @Bind(R.id.toolbar) protected Toolbar mBar;
 
   @Override protected void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
@@ -35,11 +41,36 @@ public abstract class BaseActivity<VB extends ViewDataBinding> extends AbsActivi
     }
   }
 
+  @Override protected void init(Bundle savedInstanceState) {
+    super.init(savedInstanceState);
+    setSupportActionBar(mBar);
+    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
+    mBar.setOnMenuItemClickListener(this);
+  }
+
+  protected void setTile(String title){
+    mBar.setTitle(title);
+  }
+
+  protected void showMsgDialog(String title, String msg){
+    MsgDialog dialog = new MsgDialog(this, title, msg);
+    dialog.show(getSupportFragmentManager(), "msg_dialog");
+  }
+
+  @Override public boolean onMenuItemClick(MenuItem item) {
+
+    return false;
+  }
+
+  @Override public boolean onOptionsItemSelected(MenuItem item) {
+    if (item.getItemId() == android.R.id.home) {
+      finish();
+      return true;
+    }
+    return super.onOptionsItemSelected(item);
+  }
+
   @Override protected void dataCallback(int result, Object data) {
 
   }
-
-  @Override protected void init(Bundle savedInstanceState) {
-    super.init(savedInstanceState);
-  }
 }