Editor.updateCursorPositionMz 魅族设备上的 NullPointerException

NullPointerException on Meizu devices in Editor.updateCursorPositionMz

最近,我的 Android 应用在魅族设备 (M5c、M5s、M5 Note)上出现崩溃。 Android 版本:6.0.

这是完整的堆栈跟踪:

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'int android.text.Layout.getLineForOffset(int)' on a null object reference
   at android.widget.Editor.updateCursorPositionMz(Editor.java:6964)
   at android.widget.Editor.updateCursorsPositions(Editor.java:1760)
   at android.widget.TextView.getUpdatedHighlightPath(TextView.java:5689)
   at android.widget.TextView.onDraw(TextView.java:5882)
   at android.view.View.draw(View.java:16539)
   at android.view.View.updateDisplayListIfDirty(View.java:15492)
   at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3719)
   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3699)
   at android.view.View.updateDisplayListIfDirty(View.java:15443)
   at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3719)
   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3699)
   at android.view.View.updateDisplayListIfDirty(View.java:15443)
   at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3719)
   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3699)
   at android.view.View.updateDisplayListIfDirty(View.java:15443)
   at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3719)
   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3699)
   at android.view.View.updateDisplayListIfDirty(View.java:15443)
   at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3719)
   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3699)
   at android.view.View.updateDisplayListIfDirty(View.java:15443)
   at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3719)
   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3699)
   at android.view.View.updateDisplayListIfDirty(View.java:15443)
   at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3719)
   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3699)
   at android.view.View.updateDisplayListIfDirty(View.java:15443)
   at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3719)
   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3699)
   at android.view.View.updateDisplayListIfDirty(View.java:15443)
   at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3719)
   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3699)
   at android.view.View.updateDisplayListIfDirty(View.java:15443)
   at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3719)
   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3699)
   at android.view.View.updateDisplayListIfDirty(View.java:15443)
   at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3719)
   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3699)
   at android.view.View.updateDisplayListIfDirty(View.java:15443)
   at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3719)
   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3699)
   at android.view.View.updateDisplayListIfDirty(View.java:15443)
   at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:286)
   at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:292)
   at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:327)
   at android.view.ViewRootImpl.draw(ViewRootImpl.java:3051)
   at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2855)
   at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2464)
   at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1337)
   at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6819)
   at android.view.Choreographer$CallbackRecord.run(Choreographer.java:894)
   at android.view.Choreographer.doCallbacks(Choreographer.java:696)
   at android.view.Choreographer.doFrame(Choreographer.java:631)
   at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:880)
   at android.os.Handler.handleCallback(Handler.java:815)
   at android.os.Handler.dispatchMessage(Handler.java:104)
   at android.os.Looper.loop(Looper.java:207)
   at android.app.ActivityThread.main(ActivityThread.java:5969)
   at java.lang.reflect.Method.invoke(Method.java)
   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:830)
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:720)

与我的代码没有直接关系(即使在其他线程的 stracktrace 中也是如此)。我只知道在有 TextView 的 Fragment 中每次。当 TextView 获得焦点时可能会发生这种情况,但我无法确定。当然不能重现bug,除非我买魅族

另外,由于调用了top方法updateCursorPositionMz,我觉得这可能是魅族FlymeOS的内部问题("Mz" = "Meizu"?)。

有没有人遇到过这个问题,知道原因以及如何解决?

谢谢。

更新(2019 年 8 月 8 日)

正如@andreas-wenger、@waseefakhtar 和@vadim-kotov 提到的那样,现在从 com.google.android.material:material:1.1.0-alpha08 开始包含修复程序。

旧答案

终于有机会上手一台魅族了。正如我所想,每次用户单击某个字段以获得焦点时都会发生崩溃。

就我而言,我在 TextInputLayout 中有一些 android.support.design.widget.TextInputEditText。只需将这些 TextInputEditText 替换为 AppCompatEditText 即可解决问题,如下所示:

<android.support.design.widget.TextInputLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:hint="...">

    <android.support.v7.widget.AppCompatEditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

</android.support.design.widget.TextInputLayout>

行为保持不变(因为 TextInputEditText 扩展了 AppCompatEditText)。不过我还没有找到问题的根本原因。

从 xml 中删除提示:从 TextInputLayoutTextInputEditText.

对于 Material 个组件

<com.google.android.material.textfield.TextInputLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

    <com.google.android.material.textfield.TextInputEditText
            android:id="@+id/text_input_edit_text"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>
</com.google.android.material.textfield.TextInputLayout>

设计支持

<android.support.design.widget.TextInputLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

    <android.support.design.widget.TextInputEditText
            android:id="@+id/text_input_edit_text"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>
</android.support.design.widget.TextInputLayout>

在您的代码中设置提示 以编程方式

val myTextInputEditText = findViewById<TextInputEditText>(R.id.text_input_edit_text)
myTextInputEditText.hint = "Your hint"

魅族M5S、Android6.0

上测试

在我的案例中,我验证了使用 AppCompatEditText 而不是 TextInputEditText 确实可以防止崩溃,但我们无法使用此解决方案。我们使用的 sdk 具有扩展 TextInputEditText 的视图,因此切换到 AppCompatEditText 将需要 copying/modifying 相当多的 sdk 代码到我们的项目中。

我尝试在 TextInputEditTextTextInputLayout 上设置提示,但最后我看到了双重提示(比如模糊的文字,而且我确定我没有喝太多).

我查看了@Andrew 链接到的 GitHub 问题:https://github.com/android-in-china/Compatibility/issues/11

在那一期中,他们解释说 TextInputEditText.getHint()TextInputEditText.mHint 不同时根本原因是魅族的问题。

TextInputEditTextTextInputLayout内,并且在TextInputEditText上的xml中指定提示时,支持库基本上"moves"提示包含 TextInputLayout:它在容器上设置它,然后在编辑文本上将它设置为 null。

执行此操作的来源位于 TextInputLayout.setEditText():

    // If we do not have a valid hint, try and retrieve it from the EditText, if enabled
    if (hintEnabled) {
      if (TextUtils.isEmpty(hint)) {
        // Save the hint so it can be restored on dispatchProvideAutofillStructure();
        originalHint = this.editText.getHint();
        setHint(originalHint);
        // Clear the EditText's hint as we will display it ourselves
        this.editText.setHint(null);
      }

然后当你调用TextInputEditText.getHint()时,它会return容器的提示。

getHint()(提示值)和 mHint(空值)之间的这种不一致似乎对魅族设备造成了问题

我找到了另一种方法来避免这个问题。

在魅族设备上,我:

1) 以编程方式将 TextInputEditText 的提示重置为最初从 xml 设置的提示(通过调用其覆盖的 getHint(),其中 return容器的提示)。

2) 设置TextInputEditText的提示颜色为透明,避免double/blurry的提示效果:

private void hackFixHintsForMeizu(TextInputEditText... editTexts) {
    String manufacturer = Build.MANUFACTURER.toUpperCase(Locale.US);
    if (manufacturer.contains("MEIZU")) {
        for (TextInputEditText editText : editTexts) {
            editText.setHintTextColor(Color.TRANSPARENT);
            editText.setHint(editText.getHint());
        }
    }
}

TextInputLayoutTextInputEditText 上添加提示为我解决了崩溃问题:

    <android.support.design.widget.TextInputLayout
        android:id="@+id/text_input_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="@string/login"
        app:hintAnimationEnabled="false">

        <android.support.design.widget.TextInputEditText
            android:id="@+id/text_input_edit_text"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="@string/login" />
        </android.support.design.widget.TextInputLayout>

最后以编程方式重置 TextInputEditText 的提示以避免提示文本的颜色太深:

editText = findViewById(R.id.text_input_edit_text);
editText.setHint("");

已在魅族 MX6 上验证 Android 6.0

我的解决方案基于 https://github.com/android-in-china/Compatibility/issues/11#issuecomment-427560370 中提到的 FixedTextInputEditText

首先,我创建了一个固定的 TextInputEditText 实例:

public class MeizuTextInputEditText extends TextInputEditText {
    public MeizuTextInputEditText(Context context) {
        super(context);
    }

    public MeizuTextInputEditText(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public MeizuTextInputEditText(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    public CharSequence getHint() {
        try {
            return getMeizuHintHack();
        } catch (Exception e) {
            return super.getHint();
        }
    }

    private CharSequence getMeizuHintHack() throws NoSuchFieldException, IllegalAccessException {
        Field textView = TextView.class.getDeclaredField("mHint");
        textView.setAccessible(true);
        return (CharSequence) textView.get(this);
    }
}

但是我将不得不用 MeizuTextInputEditText 替换我所有的 TextInputEditText 用法,这不是你可以在更大的代码库上轻松完成的事情。此外,在创建未来视图时,您始终需要考虑使用 MeizuTextInputEditText 而不是 'broken' 。忘记它很容易再次引入生产问题。

所以最终修复包括自定义视图 class 和 ViewPump 库 (https://github.com/InflationX/ViewPump) 我们可以很容易地做到这一点。正如文档中所解释的那样,您需要注册一个看起来像这样的自定义拦截器:

public class TextInputEditTextInterceptor implements Interceptor {
    @Override
    public InflateResult intercept(Chain chain) {
        InflateRequest request = chain.request();
        View view = inflateView(request.name(), request.context(), request.attrs());

        if (view != null) {
            return InflateResult.builder()
                    .view(view)
                    .name(view.getClass().getName())
                    .context(request.context())
                    .attrs(request.attrs())
                    .build();
        } else {
            return chain.proceed(request);
        }
    }

    @Nullable
    private View inflateView(String name, Context context, AttributeSet attrs) {
        if (name.endsWith("TextInputEditText")) {
            return new MeizuTextInputEditText(context, attrs);
        }
        return null;
    }
}

并通过在 activity:

的 onCreate 上设置一个 ViewPump 来注册该自定义拦截器,就像在文档中一样
@Override
@CallSuper
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    ViewPump.Builder viewPumpBuilder = ViewPump.builder();
    if (isMeizuDevice()) {
        viewPumpBuilder.addInterceptor(new TextInputEditTextInterceptor());
    }
    ViewPump.init(viewPumpBuilder.build());
}

如您所见,我仅在检测到魅族设备时才对 MeizuTextInputEditText 进行充气。这样就不会为不需要它的设备触发反射。此外,此方法是我的基础 Activity class,我的项目中的每个其他 activity 都从该基础扩展,因此在我的项目中启动的每个 activity 以及设备所在的位置魅族会自动修复!

我正在使用 Kotlin 和 Fragments,我只是递归地修复 onViewCreated 中的所有文本输入。

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
    super.onViewCreated(view, savedInstanceState)
    fixTextInputEditText(view) // call this in onViewCreated
}

private fun fixTextInputEditText(view: View) {
    val manufacturer = Build.MANUFACTURER.toUpperCase(Locale.US)
    if ("MEIZU" in manufacturer) {
        val views = getAllTextInputs(view)
        views.forEach(::hackFixHintsForMeizu)
    }
}

private fun getAllTextInputs(v: View): List<TextInputEditText> {
    if (v !is ViewGroup) {
        val editTexts = mutableListOf<TextInputEditText>()
        (v as? TextInputEditText)?.let {
            editTexts += it
        }
        return editTexts
    }

    val result = mutableListOf<TextInputEditText>()
    for (i in 0 until v.childCount) {
        val child = v.getChildAt(i)
        result += getAllTextInputs(child)
    }
    return result
}

private fun hackFixHintsForMeizu(editText: TextInputEditText) {
    if (editText.hint != null) {
        editText.setHintTextColor(Color.TRANSPARENT)
        editText.hint = editText.hint
    }
}

这已在 Android 库的 material 组件中修复,请参阅: https://github.com/material-components/material-components-android/pull/358

None 以上变体无需修改即可为我工作。

我的应用程序使用片段,TextInputEditText 有时在没有 TextInputLayout 的情况下使用,升级到最新的 AndroidX 目前不是选项,更换 TextInputEditText 目前也不是选项。

我的版本(基于这些解决方案和 Google 的修复):

import android.os.Build
import java.util.*
import android.content.Context
import android.support.design.widget.TextInputEditText
import android.util.AttributeSet
import android.widget.TextView
import android.support.design.widget.TextInputLayout
import android.view.inputmethod.EditorInfo
import android.view.inputmethod.InputConnection
import java.lang.reflect.Field
import java.lang.reflect.Method
import android.support.design.R

class MyInputEditText(context: Context?, attrs: AttributeSet?,defStyleAttr:Int) : TextInputEditText(context, attrs,defStyleAttr){

    constructor(context: Context?, attrs: AttributeSet?):this(context,attrs,R.attr.editTextStyle)
    constructor(context: Context?):this(context,null,R.attr.editTextStyle)


    private val buggyMeizu = ("meizu") in Build.MANUFACTURER.toLowerCase(Locale.US)

    private lateinit var getTextInputLayoutMethod:Method
    private lateinit var providesHintMethod:Method
    private lateinit var mHintField:Field

    init {
        if (buggyMeizu) {
            getTextInputLayoutMethod=TextInputEditText::class.java.getDeclaredMethod("getTextInputLayout")
            getTextInputLayoutMethod.isAccessible=true

            providesHintMethod=TextInputLayout::class.java.getDeclaredMethod("isProvidingHint")
            providesHintMethod.isAccessible=true

            mHintField=TextView::class.java.getDeclaredField("mHint")
            mHintField.isAccessible=true
        }
    }


    private fun getTILProvidesHint():Boolean {
        val layout=getTIL()
        if (layout!=null) {
            val result=providesHintMethod.invoke(layout) as Boolean
            return result;
        } else {
            return false
        }
    }

    private fun getTIL():TextInputLayout? = getTextInputLayoutMethod.invoke(this) as TextInputLayout?

    private fun getBaseHint():CharSequence? = mHintField.get(this) as CharSequence?

    override fun getHint(): CharSequence? {
        if (!buggyMeizu) {
            return super.getHint()
        } else {
            val layout=getTIL()
            return if (layout != null && (getTILProvidesHint()) ) 
                layout.hint
            else 
                provideHintWrapped()
        }
    }


    override fun onCreateInputConnection(outAttrs: EditorInfo): InputConnection? {
        val needHint=(outAttrs.hintText==null)
        val ic = super.onCreateInputConnection(outAttrs)
        if (buggyMeizu) {
            if (ic != null && needHint) {
                outAttrs.hintText = this.provideHintWrapped()
            }
        }
        return ic
    }

    private fun provideHintWrapped():CharSequence? {

        val hintFromLayout=getHintFromLayoutMine()
        if (hintFromLayout!=null) {
            return hintFromLayout
        } else {
            val baseHint=getBaseHint()
            if (baseHint!=null) {
                return baseHint
            } else {
                return null
            }
        }

    }
    private fun getHintFromLayoutMine(): CharSequence? {
        val layout = getTIL()
        return layout?.hint
    }

    override fun onAttachedToWindow() {

        if (buggyMeizu) {

            val baseHint=getBaseHint()

            if (getTIL() != null
                    && getTILProvidesHint()
                    && baseHint == null) {
                this.hint=""
            }
        }

        super.onAttachedToWindow()
    }
}

之后 find-and-replace 所有布局和代码文件中的 TextInputEditText 和 MyInputEditText。

此修复现在包含在此处的新 material-组件版本中:https://github.com/material-components/material-components-android/releases/tag/1.1.0-alpha09