android - TextInputLayout.setError() 抛出异常。为什么以及如何解决？

Question

我正在使用支持库 android-support-v7 Pkg.Revision=23.2.1。为 API 23 编译并在 4.1.2 设备上测试。在尝试实现一些现代 UI 模式时，我遇到了这个问题。

activity_test.xml布局

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

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

        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="TextInputLayout EditText default - error" />

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

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="onClickButtonSetError"
        android:text="TextInputLayout.setError()" />

</LinearLayout>

ActivityTest.java

public class ActivityTest extends AppCompatActivity
{

    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.activity_test);
    }


    public void onClickButtonSetError(View view) {
        TextInputLayout til = (TextInputLayout)findViewById(R.id.textInputLayout);
        til.setErrorEnabled(true);
        til.setError("This is a test error message.");
    }
}

如果我尝试通过 setError() 方法在 TextInputLayout 上设置错误。顺便说一下，这是通过单击按钮完成的，我得到了这个异常:

10-06 15:47:55.239: E/AndroidRuntime(5780): FATAL EXCEPTION: main
10-06 15:47:55.239: E/AndroidRuntime(5780): java.lang.IllegalStateException: Could not execute method for android:onClick
10-06 15:47:55.239: E/AndroidRuntime(5780):     at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:275)
10-06 15:47:55.239: E/AndroidRuntime(5780):     at android.view.View.performClick(View.java:4232)
10-06 15:47:55.239: E/AndroidRuntime(5780):     at android.view.View$PerformClick.run(View.java:17298)
10-06 15:47:55.239: E/AndroidRuntime(5780):     at android.os.Handler.handleCallback(Handler.java:615)
10-06 15:47:55.239: E/AndroidRuntime(5780):     at android.os.Handler.dispatchMessage(Handler.java:92)
10-06 15:47:55.239: E/AndroidRuntime(5780):     at android.os.Looper.loop(Looper.java:137)
10-06 15:47:55.239: E/AndroidRuntime(5780):     at android.app.ActivityThread.main(ActivityThread.java:4921)
10-06 15:47:55.239: E/AndroidRuntime(5780):     at java.lang.reflect.Method.invokeNative(Native Method)
10-06 15:47:55.239: E/AndroidRuntime(5780):     at java.lang.reflect.Method.invoke(Method.java:511)
10-06 15:47:55.239: E/AndroidRuntime(5780):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027)
10-06 15:47:55.239: E/AndroidRuntime(5780):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794)
10-06 15:47:55.239: E/AndroidRuntime(5780):     at dalvik.system.NativeStart.main(Native Method)
10-06 15:47:55.239: E/AndroidRuntime(5780): Caused by: java.lang.reflect.InvocationTargetException
10-06 15:47:55.239: E/AndroidRuntime(5780):     at java.lang.reflect.Method.invokeNative(Native Method)
10-06 15:47:55.239: E/AndroidRuntime(5780):     at java.lang.reflect.Method.invoke(Method.java:511)
10-06 15:47:55.239: E/AndroidRuntime(5780):     at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:270)
10-06 15:47:55.239: E/AndroidRuntime(5780):     ... 11 more
10-06 15:47:55.239: E/AndroidRuntime(5780): Caused by: java.lang.IllegalAccessError: tried to access method android.support.v7.widget.AppCompatDrawableManager.getPorterDuffColorFilter:()V from class android.support.design.widget.TextInputLayout
10-06 15:47:55.239: E/AndroidRuntime(5780):     at android.support.design.widget.TextInputLayout.updateEditTextBackground(TextInputLayout.java:700)
10-06 15:47:55.239: E/AndroidRuntime(5780):     at android.support.design.widget.TextInputLayout.setError(TextInputLayout.java:592)
10-06 15:47:55.239: E/AndroidRuntime(5780):     at com.example.testandroidsupportv7.ActivityEditText.onClickButtonSetError(ActivityEditText.java:30)
10-06 15:47:55.239: E/AndroidRuntime(5780):     ... 14 more

正如我所看到的，原因是 IllegalAccessError，它确实告诉了我很多信息。我猜方法 getPorterDuffColorFilter() 的访问修饰符在库中设置不正确。但这是我的猜测。我怎样才能摆脱这个异常，因为这个 basiclay 打败了我迁移到应用程序兼容库的原因？

Answer 1

几乎可以肯定，您在运行时使用的类版本与您预期的版本不同。

按照这个

Caused by: java.lang.IllegalAccessError: tried to access method android.support.v7.widget.AppCompatDrawableManager.getPorterDuffColorFilter:()V from class android.support.design.widget.TextInputLayout

我为您找到了解决方法。以下是您必须在 xml 中为 textInputLayout 应用的样式。

<style name="TextLabel" parent="TextAppearance.AppCompat">
<item name="android:textColorHint">@color/colorLightText</item>
<item name="android:textSize">14dp</item>
<item name="colorAccent">@color/colorAccent</item>
<item name="colorControlNormal">@color/colorMediumText</item>
<item name="colorControlActivated">@color/colorAccent</item>
<item name="android:textColorHighlight">@color/COLOR</item>
<item name="android:textColorLink">@color/COLOR</item>

让我知道它是否适合您。