构建apk后出现的错误

Question

生成签名的apk后，操作栏视图（共享操作提供程序和searchview）崩溃。当调试从Android Studio中的应用程序它的工作，但是当我生成签署APK安装应用设备我得到象这样的错误：

java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.SearchView.setQueryHint(java.lang.CharSequence)' on a null object reference 
      at tm.veriloft.ertir.ui.SearchActivity.onCreateOptionsMenu(Unknown Source) 
      at android.app.Activity.onCreatePanelMenu(Activity.java:2820) 
      at android.support.v4.app.o.onCreatePanelMenu(Unknown Source) 
      at android.support.v7.app.e.a(Unknown Source) 
      at android.support.v7.app.g.a(Unknown Source) 
      at android.support.v7.widget.as.a(Unknown Source) 
      at android.support.v7.internal.a.a.j(Unknown Source) 
      at android.support.v7.internal.a.b.run(Unknown Source) 
      at android.os.Handler.handleCallback(Handler.java:739) 
      at android.os.Handler.dispatchMessage(Handler.java:95) 
      at android.os.Looper.loop(Looper.java:135) 
      at android.app.ActivityThread.main(ActivityThread.java:5221) 
      at java.lang.reflect.Method.invoke(Native Method) 
      at java.lang.reflect.Method.invoke(Method.java:372) 
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) 
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) 

或

java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.ah.a(android.content.Intent)' on a null object reference 
      at tm.veriloft.ertir.ui.BlogViewActivity.onCreateOptionsMenu(Unknown Source) 
      at android.app.Activity.onCreatePanelMenu(Activity.java:2820) 
      at android.support.v4.app.o.onCreatePanelMenu(Unknown Source) 
      at android.support.v7.app.e.a(Unknown Source) 
      at android.support.v7.app.g.a(Unknown Source) 
      at android.support.v7.widget.as.a(Unknown Source) 
      at android.support.v7.internal.a.a.j(Unknown Source) 
      at android.support.v7.internal.a.b.run(Unknown Source) 
      at android.os.Handler.handleCallback(Handler.java:739) 
      at android.os.Handler.dispatchMessage(Handler.java:95) 
      at android.os.Looper.loop(Looper.java:135) 
      at android.app.ActivityThread.main(ActivityThread.java:5221) 
      at java.lang.reflect.Method.invoke(Native Method) 
      at java.lang.reflect.Method.invoke(Method.java:372) 
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) 
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) 

我使用的是支持库的最后版本和工具栏。 （通过设定setSupportActionBar(mToolbar)）。

搜索查看XML：

<menu xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:ertir="http://schemas.android.com/apk/res-auto"> 
    <item 
     android:id="@+id/action_search" 
     android:title="@string/title_activity_search" 
     ertir:showAsAction="always" 
     ertir:actionViewClass="android.support.v7.widget.SearchView" /> 
</menu> 

的Java

@Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     getMenuInflater().inflate(R.menu.search, menu); 
     MenuItem searchItem = menu.findItem(R.id.action_search); 
     mSearchView = (SearchView) searchItem.getActionView(); 
     mSearchView.setQueryHint(getString(R.string.search_hint)); 
     mSearchView.setFocusable(true); 
     mSearchView.setIconified(false); 
     mSearchView.requestFocusFromTouch(); 
     mSearchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() { 
      @Override 
      public boolean onQueryTextSubmit(String query) { 
       mSearchView.clearFocus(); //Hide keyboard 
       search(query, searchTypeArray.get(searchTypeSpinner.getSelectedItemPosition()).getType()); 
       return false; 
      } 

      @Override 
      public boolean onQueryTextChange(String query) { 
       if (searchTypeArray.get(searchTypeSpinner.getSelectedItemPosition()).getType().equals("blogs")) 
        searchAfter(1100, query, searchTypeArray.get(searchTypeSpinner.getSelectedItemPosition()).getType()); 
       else 
        search(query, searchTypeArray.get(searchTypeSpinner.getSelectedItemPosition()).getType()); 
       return false; 
      } 
     }); 
     return true; 
    } 

我怎样才能解决这个问题？就像上面说的，我只有在签署apk之后才会出错。

Answer 1

发生这种情况的原因是您尚未适当配置您的progaurd。在你的build.gradle下buildTypes和'释放'改变runProguard true到runProguard false并生成烧焦APK和测试。如果运行良好，请尝试学习正确配置progaurd :)

Answer 2

在proguard-rules.pro中，添加以下行以排除SearchView类：012ke'-keep class android.support.v7.widget。** { *; }'然后创建构建。我是这样解决的。

Answer 3

这对我的作品，

添加以下行proguard-rules.pro位于应用程序文件夹中的文件：

-keep类android.support.v7.widget.SearchView {*; }