java.lang.NullPointerException Attempt to invoke virtual method 'int android.widget.Editor on a null
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.lwp.justtest/com.lwp.justtest.next}: java.lang.NullPointerException...: Attempt to invoke virtual method 'int android.content.Intent.getIntExtra(java.lang.String, int)' on...com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756) Caused by: java.lang.NullPointerException...: Attempt to invoke virtual method 'int android.content.Intent.getIntExtra(java.lang.String, int)' on
异常Logcat: Process: com.atguigu.shoppingmall, PID: 11093 java.lang.NullPointerException: Attempt to...write to field 'int android.support.v7.widget.RecyclerView$ViewHolder.mItemViewType' on a null object
: Attempt to read from field 'b.a.a.d b.a.a.b.a' on a null object reference at b.a.a.a....: Attempt to read from field 'b.a.a.d b.a.a.b.a' on a null object reference at kim.hsl.handler.Handler.void...: Attempt to read from field 'b.a.a.d b.a.a.b.a' on a null object reference at b.a.a.a....: Attempt to read from field 'b.a.a.d b.a.a.b.a' on a null object reference at b.a.a.a....: Attempt to read from field 'b.a.a.d b.a.a.b.a' on a null object reference at b.a.a.a.
java.lang.RuntimeException: Unable to start activity ComponentInfo{kim.hsl.handler/kim.hsl.handler.MainActivity}: java.lang.NullPointerException...: Attempt to read from field 'b.a.a.d b.a.a.b.a' on a null object reference at android.app.ActivityThread.performLaunchActivity...: Attempt to read from field 'b.a.a.d b.a.a.b.a' on a null object reference at b.a.a.a....混淆过的代码 的对应关系文件 mapping.txt ; 该文件存放在 app\build\outputs\mapping\debug 目录下 ; 上面的报错信息 : Caused by: java.lang.NullPointerException...: Attempt to read from field 'b.a.a.d b.a.a.b.a' on a null object reference at b.a.a.a.
design:25.3.1' 现在升级到 28.0.0 ; implementation 'com.android.support:design:28.0.0' 报错信息 : Caused by: java.lang.NullPointerException...: Attempt to invoke virtual method 'void java.lang.reflect.Field.setAccessible(boolean)' on a null object...TabLayout extends HorizontalScrollView { public static class Tab { public static final int...icon; private CharSequence text; private CharSequence contentDesc; private int...resId) { LayoutInflater inflater = LayoutInflater.from(this.view.getContext());
{ //1/4 定义变量 private Paint mRectPaintStroke; private Paint mRectPaintFill; private int...[] rect1 = new int[]{10, 10 , 110, 110}; private int[] rect2 = new int[]{10, 310 , 110, 410};...4 三个构造函数 public DrawRectView(Context context, AttributeSet attrs, int...com.example.canvastest, PID: 4468 java.lang.NullPointerException...: Attempt to read from field 'long android.graphics.Paint.mNativePaint' on a null object reference
解释： 出现问题的原因在于我们给View添加Tag内容时，其中的Key的值并不能随便写个int值，如果随便写个int值就会出现上面的错误了。...java.lang.RuntimeException: Unable to start activity ComponentInfo{com.xxx.xxx/com.xxx.xx.activity.login.XXXX}: java.lang.NullPointerException...: Attempt to read from field 'androidx.camera.view.PreviewView com.xxx.xxx.databinding.XXXXXXXeBinding.previewView...java.lang.RuntimeException: Unable to start activity ComponentInfo{com.xxx.xxx/com.xxx.xx.activity.login.XXXX}: java.lang.NullPointerException...: Attempt to read from field 'androidx.camera.view.PreviewView com.xxx.xxx.databinding.XXXXXXXeBinding.previewView
Select * from zflight into int_fligh. Append int_fligh. Clear int_fligh. Endselect....Modify int_fligh transporting flag where flag is initial. 6、使用二分法查询，提高查询内表数据速度 不推荐 Read table int_fligh...推荐 Read table int_fligh with key airln = ‘LF’ binary search. 7、两个内表添加使用批量增加代替逐行 不推荐 Loop at int_fligh1...Select single * from zfligh into int_fligh where cntry = int_cntry-cntry. Append int_fligh....Attempt should be made to move entire internal table headers in a single shot, rather than moving the
: Attempt to invoke interface method 'java.util.List android.print.IPrintManager.getPrintServices(int...: Attempt to invoke interface method 'java.util.List android.print.IPrintManager.getPrintServices(int...SystemConfig.java // These are the features this devices supports that were read from the // system configuration...调用读取配置文件的地方是： SystemConfig() { // Read configuration from system readPermissions(Environment.buildPath...( Environment.getRootDirectory(), "etc", "sysconfig"), ALLOW_ALL); // Read configuration
强制更新，下载了最新的包之后打开报错： java.lang.NullPointerException: Attempt to invoke virtual method ‘android.content.res.XmlResourceParser...fileFullName); Intent intent = new Intent(Intent.ACTION_VIEW); if (Build.VERSION.SDK_INT...>= Build.VERSION_CODES.N) { intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); //...contentUri, "application/vnd.android.package-archive"); intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION
java.lang.RuntimeException:Unable to resume activity {com.xxxx.center/com.xxxx.center.activity.LoadActivity}: java.lang.NullPointerException...: Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference 2 android.app.ActivityThread.performResumeActivity...(ActivityThread.java:3284) 3 ...... 4 java.lang.NullPointerException:Attempt to invoke virtual method...'int java.lang.String.length()' on a null object reference 5 okhttp3.HttpUrl.canonicalize(HttpUrl.java
无法去构造Handler Handler handler = new Handler(handlerThread.getLooper()); // java.lang.NullPointerException...: Attempt to read from field 'android.os.MessageQueue android.os.Looper.mQueue' on a null object reference...mPriority = Process.THREAD_PRIORITY_DEFAULT; } public HandlerThread(String name, int...Thread id，就是线程的ID，表明线程的身份 // 1、获取到Tid mTid = Process.myTid(); public int getThreadId() { //2、返回Tid...android.os.Process.setThreadPriority (intpriority); android.os.Process.setThreadPriority (inttid, int
== resume: found_resume = True print "Resuming wordlist from...，否则爆破文件 if "." not in attempt: attempt_list.append("/%s/" % attempt)...: for extentsion in extentsions: attempt_list.append("/%s%s" % (attempt...coding:utf8 -*- import urllib2 import urllib import cookielib import threading import sys import Queue from...word == resume: found_resume = True print "Resuming wordlist from
to execute the task, or a repeated attempt....buffer with bytes read from the file starting from an offset. */ private boolean fillBuffer...if (this.splitLength == FileInputFormat.READ_WHOLE_SPLIT_FLAG) { int read = this.stream.read...toRead = maxReadLength; this.overLimit = true; } int read = this.stream.read...this.readPos = offset; // position from where to start reading this.limit = read
to execute the task, or a repeated attempt....buffer with bytes read from the file starting from an offset. */ private boolean fillBuffer...if (this.splitLength == FileInputFormat.READ_WHOLE_SPLIT_FLAG) { int read = this.stream.read...toRead = maxReadLength; this.overLimit = true; } int read = this.stream.read...this.readPos = offset; // position from where to start reading this.limit = read
背景 我们一般要通过 JVM 异常报告的代码位置去处理，JVM 会打印出导致空指导异常的详细类名、方法名以及行号，如以下异常所示： Exception in thread "main" java.lang.NullPointerException...详细的空指针异常信息 详细可以看官方这篇介绍： https://openjdk.java.net/jeps/358 Exception in thread "main" java.lang.NullPointerException...: Cannot read field "name" because "params.user" is null at Test.main(Test.java:3) 如上所示...另外，如果是下标式访问的赋值语句，如 a[i][j][k] = 2020; 抛出空指针，那会是这样的： Exception in thread "main" java.lang.NullPointerException...: Cannot load from object array because "a[i][j]" is null at Test.main(Test.java:18) 注意：
public class Constants { public static String BOOK_NAME = "book_name"; } //MainActivity.java Field...文件进行反编译一探究竟.推荐一下这个在线反编译工具 http://www.javadecompilers.com/apk 注意,使用jadx decompiler后,会重新命名,正如下面注释/* renamed from...: Attempt to invoke virtual method 'int android.graphics.Bitmap.getWidth()' on a null object reference...: Attempt to invoke virtual method 'int android.graphics.Bitmap.getWidth()' on a null object reference...: Attempt to invoke virtual method 'int android.graphics.Bitmap.getWidth()' on a null object reference
: Attempt to invoke virtual method 'android.view.Window$Callback android.view.Window.getCallback()' on...: Attempt to invoke virtual method 'android.view.Window$Callback android.view.Window.getCallback()' on...traces starts. 2021-03-26 11:30:49.668 8620-8620/cn.hsl.example W/cn.hsl.example: Accessing hidden field...: Attempt to invoke virtual method 'android.view.Window$Callback android.view.Window.getCallback()' on...: Attempt to invoke virtual method 'android.view.Window$Callback android.view.Window.getCallback()' on
如果SDK未初始化，启动核身流程，则会报错： Caused by: java.lang.NullPointerException: Attempt to read from field 'java.lang.String
领取专属 10元无门槛券
手把手带您无忧上云
云服务器
即时通信 IM
ICP备案
对象存储
实时音视频
