【android.widget.TextView.setText() on a null object reference】的更多相关文章

android.widget.TextView.setText() on a null object reference

错误描述 java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference 问题分析 照成错误的原因是那个 TextView ,并不是传进去的那个值的问题.确保你在 setText() 的时候,已经初使化了你的 TextView…

Caused by: java.lang.NullPointerException: Attempt to write to field 'int android.app.Fragment.mNextAnim' on a null object reference

原因fragment必须先add(),才能remove(),故remove前先做判空操作 参考:http://www.cnblogs.com/hixin/p/4427276.html…

java.lang.ClassCastException: android.widget.RelativeLayout cannot be cast to android.widget.TextView

最近在学习drawerLayout时,遇到这个bug.如下示: java.lang.ClassCastException: android.widget.RelativeLayout cannot be cast to android.widget.TextView 原因: 可能是没有在适配器参数内加入TextView的id. 解决方案: 将原来的适配器参数代码 mDrawerList.setAdapter(new ArrayAdapter<String>(this,R.layout.list…

Attempt to write to field 'android.support.v4.app.FragmentManagerImpl android.support.v4.app.Fragment.mFragmentManager' on a null object reference

E/AndroidRuntime﹕ FATAL EXCEPTION: mainProcess: org.example.magnusluca.drawertestapp, PID: 3624java.lang.NullPointerException: Attempt to write to field 'android.support.v4.app.FragmentManagerImpl android.support.v4.app.Fragment.mFragmentManager' on…

java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.EditText

Caused by: Java.lang.ClassCastException: Android.widget.TextView cannot be cast to android.widget.EditText 该种报错信息,检查代码确定无误后,若还是出现这种错误,则可通过以下这个办法进行解决: 点中该项目-->点击Project-->clean   清理下再重新运行该项目…

安卓出现错误： java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.EditText

Caused by: Java.lang.ClassCastException: Android.widget.TextView cannot be cast to android.widget.EditText 该种报错信息,检查代码确定无误后,若还是出现这种错误,则可通过以下这个办法进行解决: 点中该项目-->点击Project-->clean   清理下再重新运行该项目,然后就解决了…

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.ActionBar.setDisplayShowHomeEnabled(boolean)' on a null object reference

/********************************************************************************* * Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.ActionBar.setDisplayShowHomeEnabled(boolean)' on a null object referenc…

on a null object reference 问题的解决办法

FATAL EXCEPTION: …… java.lang.RuntimeException: Unable to start activity ComponentInfo…… ava.lang.NullPointerException: Attempt to invoke virtual method 'android……on a null object reference 介绍: 我在写项目的时候,遇到了button等控件出现on a null object reference ,在网上找了…

java.lang.NullPointerException: Attempt to invoke virtual method 'int com.example.xxx.Json.NewsBean.getError_code()' on a null object reference错误解决

AS在运行的过程中出现了错误: java.lang.NullPointerException: Attempt to invoke virtual method 'int com.example.xxx.Json.NewsBean.getError_code()' on a null object reference AS会报异常:异常:No Network Security Config specified, using platform default.是高版本联网失败的问题 解决办法:在清…

java.lang.NullPointerException: Attempt to invoke virtual method 'java.util.List com.yunweather.app.db.YunWeatherDB.loadProvinces()' on a null object reference

NullPointerException:查看自己的什么地方是否对空指针进行了操作 Attempt to invoke virtual method 'java.util.List com.yunweather.app.db.YunWeatherDB.loadProvinces()' on a null object reference 尝试用一个空对象引用调用LoadProvinces()方法,查看调用LoadProvinces()的对象是否初始化,很可能是因为你没有初始化就调用了LoadPr…