Android~记录material.tabs.TabLayout一个bug
16lz
2023-01-31
在使用TabLayout过程中发现一个奇葩的bug，说我xml布局文件有问题。
1、完整log
2019-12-30 16:50:41.426 9068-9068/? E/ActivityThread: Failed to find provider info for com.mirrorlink.android.provider2019-12-30 16:50:41.586 10184-10184/? E/AndroidRuntime: FATAL EXCEPTION: main java.lang.RuntimeException: Unable to start activity ComponentInfo{com.ut.smartcook/com.ut.smartcook.MainActivity}: android.view.InflateException: Binary XML file line #24: Binary XML file line #24: Error inflating class com.google.android.material.tabs.TabLayout at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3021) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3156) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1864) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:205) at android.app.ActivityThread.main(ActivityThread.java:6991) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:884) Caused by: android.view.InflateException: Binary XML file line #24: Binary XML file line #24: Error inflating class com.google.android.material.tabs.TabLayout Caused by: android.view.InflateException: Binary XML file line #24: Error inflating class com.google.android.material.tabs.TabLayout Caused by: java.lang.reflect.InvocationTargetException at java.lang.reflect.Constructor.newInstance0(Native Method) at java.lang.reflect.Constructor.newInstance(Constructor.java:343) at android.view.LayoutInflater.createView(LayoutInflater.java:647) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:790) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730) at android.view.LayoutInflater.rInflate(LayoutInflater.java:863) at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824) at android.view.LayoutInflater.rInflate(LayoutInflater.java:866) at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824) at android.view.LayoutInflater.inflate(LayoutInflater.java:515) at android.view.LayoutInflater.inflate(LayoutInflater.java:423) at android.view.LayoutInflater.inflate(LayoutInflater.java:374) at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:435) at android.app.Activity.setContentView(Activity.java:2777) at com.ut.smartcook.MainActivity.onCreate(MainActivity.java:34) at android.app.Activity.performCreate(Activity.java:7159) at android.app.Activity.performCreate(Activity.java:7150) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1272) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3001) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3156) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1864) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:205) at android.app.ActivityThread.main(ActivityThread.java:6991) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:884) Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int android.content.res.ColorStateList.getDefaultColor()' on a null object reference at com.google.android.material.tabs.TabLayout.<init>(TabLayout.java:548) at com.google.android.material.tabs.TabLayout.<init>(TabLayout.java:461) at java.lang.reflect.Constructor.newInstance0(Native Method) at java.lang.reflect.Constructor.newInstance(Constructor.java:343) at android.view.LayoutInflater.createView(LayoutInflater.java:647) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:790) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730) at android.view.LayoutInflater.rInflate(LayoutInflater.java:863) at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824) at android.view.LayoutInflater.rInflate(LayoutInflater.java:866) at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824) at android.view.LayoutInflater.inflate(LayoutInflater.java:515) at android.view.LayoutInflater.inflate(LayoutInflater.java:423) at android.view.LayoutInflater.inflate(LayoutInflater.java:374) at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:435) at android.app.Activity.setContentView(Activity.java:2777) at com.ut.smartcook.MainActivity.onCreate(MainActivity.java:34) at android.app.Activity.performCreate(Activity.java:7159) at android.app.Activity.performCreate(Activity.java:7150) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1272) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3001) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3156) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1864) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:205) at android.app.ActivityThread.main(ActivityThread.java:6991) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:884) 2、关键log
Caused by: android.view.InflateException: Binary XML file line #24: Binary XML file line #24: Error inflating class com.google.android.material.tabs.TabLayoutCaused by: android.view.InflateException: Binary XML file line #24: Error inflating class com.google.android.material.tabs.TabLayoutCaused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int android.content.res.ColorStateList.getDefaultColor()' on a null object reference at com.google.android.material.tabs.TabLayout.<init>(TabLayout.java:548)大概意思是说Tablayout初始化时，tabTextColors = createColorStateList(tabTextColors.getDefaultColor(), selected);
tabTextColors为空。
3、解决办法
app:tabTextColor="#81858B"
app:tabSelectedTextColor="#31353B"
将tabTextColor放在tabSelectedTextColor之前声明即可，如果没在配置好tabTextColor之后配置tabSelectedTextColor会报错！
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