我正在使用支持库android-support-v7 Pkg.Revision=23.2.1。编译时API版本为23,测试设备为4.1.2。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。这是通过点击按钮完成的,我会得到以下异常:
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
据我所见,问题的原因是IllegalAccessError,但它并没有给我提供太多信息。我猜测方法getPorterDuffColorFilter()的访问修饰符在库中没有正确设置。但这只是我的猜测。我该如何摆脱这个异常呢?因为这基本上是迁移到应用兼容库的原因被打败了。