操作栏消失，当我切换新的活动（Android Studio中）

问题描述：

这里是我的MainActivity操作栏消失，当我切换新的活动（Android Studio中）

package com.arrival.grontha; 

import android.app.Fragment; 
import android.content.Intent; 
import android.graphics.BitmapFactory; 
import android.os.Bundle; 
import android.support.v4.widget.DrawerLayout; 
import android.support.v7.app.ActionBarActivity; 
import android.support.v7.widget.Toolbar; 
import android.view.Menu; 
import android.view.MenuItem; 

import com.parse.Parse; 
import com.parse.ParseAnalytics; 
import com.parse.ParseInstallation; 
import com.parse.PushService; 

public class MainActivity extends ActionBarActivity 
     implements NavigationDrawerCallbacks { 

    /** 
    * Fragment managing the behaviors, interactions and presentation of the navigation drawer. 
    */ 

    private NavigationDrawerFragment mNavigationDrawerFragment; 
    private Toolbar mToolbar; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.drawer_activity_main); 

     mToolbar = (Toolbar) findViewById(R.id.tool_bar); 
     setSupportActionBar(mToolbar); 

     //Parse push notification 
     Parse.initialize(this, getString(R.string.parse_application_id), getString(R.string.parse_client_key)); 
     ParseAnalytics.trackAppOpened(getIntent()); 
     PushService.setDefaultPushCallback(this, MainActivity.class); 
     ParseInstallation.getCurrentInstallation().saveInBackground(); 

     mNavigationDrawerFragment = (NavigationDrawerFragment) 
       getFragmentManager().findFragmentById(R.id.fragment_drawer); 

     // Set up the drawer. 
     mNavigationDrawerFragment.setup(R.id.fragment_drawer, (DrawerLayout) findViewById(R.id.drawer), mToolbar); 
     // populate the navigation drawer 
     mNavigationDrawerFragment.setUserData(getResources().getString(R.string.app_name), getResources().getString(R.string.email), BitmapFactory.decodeResource(getResources(), R.drawable.ic_logo_app)); 
    } 

    @Override 
    public void onNavigationDrawerItemSelected(int position) { 
     Fragment fragment; 
     switch (position) { 
      case 0: //stats 
       fragment = getFragmentManager().findFragmentByTag(Fragment_Books.TAG); 
       if (fragment == null) { 
        fragment = new Fragment_Books(); 
       } 
       getFragmentManager().beginTransaction().replace(R.id.container, fragment, Fragment_Books.TAG).commit(); 
       break; 
      case 1: 
       fragment = getFragmentManager().findFragmentByTag(Fragment_Favorite.TAG); 
       if (fragment == null) { 
        fragment = new Fragment_Favorite(); 
       } 
       getFragmentManager().beginTransaction().replace(R.id.container, fragment, Fragment_Favorite.TAG).commit(); 
       break; 
      case 2: 
       fragment = getFragmentManager().findFragmentByTag(Fragment_About.TAG); 
       if (fragment == null) { 
        fragment = new Fragment_About(); 
       } 
       getFragmentManager().beginTransaction().replace(R.id.container, fragment, Fragment_About.TAG).commit(); 
       break; 
     } 
    } 


    @Override 
    public void onBackPressed() { 
     if (mNavigationDrawerFragment.isDrawerOpen()) 
      mNavigationDrawerFragment.closeDrawer(); 
     else 
      super.onBackPressed(); 
    } 


    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     if (!mNavigationDrawerFragment.isDrawerOpen()) { 
      // Only show items in the action bar relevant to this screen 
      // if the drawer is not showing. Otherwise, let the drawer 
      // decide what to show in the action bar. 
      getMenuInflater().inflate(R.menu.unused, menu); 
      return true; 
     } 
     return super.onCreateOptionsMenu(menu); 
    } 


    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 
     switch(id) { 
      case R.id.menu_settings: 
       Intent intent = new Intent(this, SettingsActivity.class); 
       startActivity(intent); 
     } 

     return super.onOptionsItemSelected(item); 
    } 



    @Override 
    protected void onPause() { 
     super.onPause(); 
    } 

    @Override 
    protected void onResume() { 
     super.onResume(); 
    } 

    @Override 
    protected void onDestroy() { 
     super.onDestroy(); 
    } 

}

这里是我SettingsActivity

package com.arrival.grontha; 

import android.app.ActionBar; 
import android.support.v7.app.ActionBarActivity; 
import android.os.Bundle; 
import android.view.Menu; 
import android.view.MenuItem; 

public class SettingsActivity extends ActionBarActivity { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_settings); 

    } 
}

我尝试用动作条菜单切换的SettingsActivity。它的工作，但是当SettingsActivity出现我的ActionBar消失:( 我该如何解决它？请帮助我....

答

你需要拨打setSupportActionBar(yourToolbar)来显示工具栏，并确保你的activity_settings。 xml在其中定义了一个工具栏

我在SettingsActivity上设置了我的工具栏。但是，现在当我运行我的应用程序，并点击设置菜单转到设置布局崩溃！添加工具栏。我用这样的方式： '进口android.support.v7.widget.Toolbar;' 导入工具栏小工具然后加入 '私人工具栏mToolbar;' 最后加 'setSupportActionBar（mToolbar）;' @Abhishek Dabholkar –

您可能没有在xml布局中定义工具栏。你能发布更新的activity_settings.xml和更新的SettingsActivity.java吗？我可以指出哪里出了问题。 –

答

我有同样的事情发生，我使用AndroidStudio 2.3并创建了一个新的活动，IDE向AndroidManifest添加了android：theme =“@ style/AppTheme.NoActionBar”。 xml，同时创建新的活动

答

我不小心扩展了Activity而不是AppCompatActivity，这可能会包含defau工具栏LT。

操作栏消失，当我切换新的活动（Android Studio中）

相关推荐