小编fik*_*r4n的帖子

例如，我有以下代码：

@Retention(RetentionPolicy.SOURCE)
public @interface ClassAnnotation {
}

@ClassAnnotation
public class AnnotatedClass {
}

@ClassAnnotation
public class AnotherAnnotatedClass {

    private AnnotatedClass someField;
    private int intIsNotAnnotated;
}

并在编译时对该处理器进行预处理：

@SupportedAnnotationTypes({ "com.example.ClassAnnotation" })
@SupportedSourceVersion(SourceVersion.RELEASE_6)
public class AwesomeProcessor extends AbstractProcessor {

    public boolean process(Set<? extends TypeElement> annotations,
            RoundEnvironment roundEnv) {
        // Skipped for brevity...
        // For each annotated class
        for (Element e : roundEnv.getElementsAnnotatedWith(ClassAnnotation.class)) {
            // Skipped for brevity...
            // For each field
            for (Element ee : classElement.getEnclosedElements()) {
                // Skipped for brevity... (of course …

我正在使用RecyclerView（com.android.support:recyclerview-v7:21.0.2）GridLayoutManager并应用动态列数。滚动视图时，将引发异常。当RecyclerView即将显示以前未显示的项目（重新使用或重新绑定）时，似乎发生了错误。但是，如果我不使用这样的动态跨度/列数，或者只是注释行调用GridLayoutManager.setSpanCount，则不会发生。

我试图检查源代码，看来问题与临时数组有关mSet。

E/AndroidRuntime? FATAL EXCEPTION: main
    java.lang.ArrayIndexOutOfBoundsException
            at android.support.v7.widget.GridLayoutManager.layoutChunk(GridLayoutManager.java:361)
            at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1269)
            at android.support.v7.widget.LinearLayoutManager.scrollBy(LinearLayoutManager.java:1097)
            at android.support.v7.widget.LinearLayoutManager.scrollVerticallyBy(LinearLayoutManager.java:957)
            at android.support.v7.widget.RecyclerView.scrollByInternal(RecyclerView.java:985)
            at android.support.v7.widget.RecyclerView.onTouchEvent(RecyclerView.java:1686)
            at android.view.View.dispatchTouchEvent(View.java:3885)
            at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:903)
            at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
            at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
            at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
            at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
            at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
            at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
            at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
            at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
            at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1691)
            at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1125)
            at android.app.Activity.dispatchTouchEvent(Activity.java:2096)
            at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1675)
            at android.view.ViewRoot.deliverPointerEvent(ViewRoot.java:2194)
            at android.view.ViewRoot.handleMessage(ViewRoot.java:1878)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:123)
            at android.app.ActivityThread.main(ActivityThread.java:3683)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:507)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) …

我做了一个无限的ValueAnimator,它持有对视图的引用Context(当然视图保持引用),并且日志显示它在视图被(应该被)销毁时不会停止.

    ValueAnimator anim = ValueAnimator.ofFloat(0, 1);
    anim.addListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationRepeat(Animator animation) {
                myView.setText(...);
                Log.d("my_tag", "I am still running and repeating");
            }
    });
    anim.setRepeatCount(ValueAnimator.INFINITE);
    anim.start();

当然,我可以通过将侦听器提取为静态内部类并保持一个WeakReference而不是保持(强)引用.但是,我的问题是,如果有限的动画师(例如anim.setRepeatCount(3))在定义的时间内停止,它会在动画结束后导致内存泄漏吗？(所以我需要做同样的弱参考策略)？

我正在尝试为Android创建自定义键盘.我使用软键盘示例应用程序作为起点.我的问题是我无法在键盘中居中,而我在网上找到的其他样本显然有效.

我的XML文件如下所示:

<?xml version="1.0" encoding="utf-8"?><Keyboard xmlns:android="http://schemas.android.com/apk/res/android"
android:horizontalGap="@dimen/horizontal_gap"
android:keyHeight="@dimen/key_height"
android:keyWidth="10%p"
android:verticalGap="@dimen/vertical_gap" >
<Row>
    <Key
        android:codes="49"
        android:keyEdgeFlags="left"
        android:keyLabel="1" />
    <Key
        android:codes="50"
        android:keyLabel="2" />
    <Key
        android:codes="51"
        android:keyLabel="3" />
    <Key
        android:codes="52"
        android:keyLabel="4" />
    <Key
        android:codes="53"
        android:keyLabel="5" />
    <Key
        android:codes="54"
        android:keyLabel="6" />
    <Key
        android:codes="55"
        android:keyLabel="7" />
    <Key
        android:codes="56"
        android:keyLabel="8" />
    <Key
        android:codes="57"
        android:keyLabel="9" />
    <Key
        android:codes="48"
        android:keyEdgeFlags="right"
        android:keyLabel="0" />
</Row>
<Row>
    <Key
        android:codes="1"            
        android:keyEdgeFlags="left"
        android:keyLabel="q" />
    <Key
        android:codes="2"
        android:keyLabel="w" />
    <Key
        android:codes="3"
        android:keyLabel="e" />
    <Key
        android:codes="4"
        android:keyLabel="r" />
    <Key
        android:codes="5"
        android:keyLabel="t" />
    <Key
        android:codes="6"
        android:keyLabel="y" …