改变背景颜色为ImageView的图片源参考选择器

Question

我有一个图像，我想改变从黑色背景到灰色背景时按下，并使用选择器似乎是最好的方式来做到这一点，但颜色没有改变。我可以让图像在点击时改变，但我只想改变背景颜色。我宁愿不使用onClickListener只是b/c这似乎更干净。下面是我的代码:

图片:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="horizontal"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content">
  <RelativeLayout
    android:id="@+id/image_block"
    android:layout_width="0dp"
    android:layout_height="fill_parent"
    android:layout_weight="1">
    <ImageView
      android:id="@+id/image_btn"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:clickable="true"
      android:src="@drawable/image_selector"/>
  </RelativeLayout>
</LinearLayout>

选择器:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
  <item
    android:state_pressed="true"
    android:drawable="@drawable/image_gray"
    android:background="@color/gray"/>
  <item
    android:drawable="@drawable/image_gray"
    android:background="@color/black"/>
</selector>

LogCat当StackOverflow发生时(一个干净的修复它):

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.ex.package/com.ex.package.ImageActivity}: android.view.InflateException: Binary XML file line #13: Error inflating class <unknown>
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2596)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2653)
        at android.app.ActivityThread.access$800(ActivityThread.java:156)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1355)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:157)
        at android.app.ActivityThread.main(ActivityThread.java:5872)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:515)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:674)
        at dalvik.system.NativeStart.main(Native Method)
 Caused by: android.view.InflateException: Binary XML file line #13: Error inflating class <unknown>
        at android.view.LayoutInflater.createView(LayoutInflater.java:620)
        at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
        at android.view.LayoutInflater.onCreateView(LayoutInflater.java:669)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:694)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:758)
        at android.view.LayoutInflater.parseInclude(LayoutInflater.java:839)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:745)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
at dcom.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:375)
        at android.app.Activity.setContentView(Activity.java:1997)
        at com.ex.package.ImageActivity.onCreate(ImageActivity.java:33)
        at android.app.Activity.performCreate(Activity.java:5312)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1111)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2552)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2653)
        at android.app.ActivityThread.access$800(ActivityThread.java:156)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1355)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:157)
        at android.app.ActivityThread.main(ActivityThread.java:5872)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:515)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:674)
        at dalvik.system.NativeStart.main(Native Method)
    Caused by: java.lang.reflect.InvocationTargetException
        at java.lang.reflect.Constructor.constructNative(Native Method)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at android.view.LayoutInflater.createView(LayoutInflater.java:594)
        at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
        at android.view.LayoutInflater.onCreateView(LayoutInflater.java:669)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:694)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:758)
        at android.view.LayoutInflater.parseInclude(LayoutInflater.java:839)
        a
t android.view.LayoutInflater.rInflate(LayoutInflater.java:745)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
                at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
              at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:375)
              at android.app.Activity.setContentView(Activity.java:1997)
              at com.ex.package.ImageActivity.onCreate(ImageActivity.java:33)
            at android.app.Activity.performCreate(Activity.java:5312)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1111)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2552)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2653)
            at android.app.ActivityThread.access$800(ActivityThread.java:156)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1355)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:157)
            at android.app.ActivityThread.main(ActivityThread.java:5872)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at    com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:674)
            at dalvik.system.NativeStart.main(Native Method)
        Caused by: java.lang.StackOverflowError
            at android.util.LongSparseArray.get(LongSparseArray.java:111)
            at android.util.LongSparseArray.get(LongSparseArray.java:102)
            at android.content.res.Resources.getCachedDrawable(Resources.java:2226)
            at android.content.res.Resources.loadDrawable(Resources.java:2086)
            at android.content.res.Resources.getDrawable(Resources.java:711)
            at android.graphics.drawable.StateListDrawable.inflate(StateListDrawable.java:176)
            at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:937)
            at android.graphics.drawable.Drawable.createFromXml(Drawable.java:877)
            at android.content.res.Resources.loadDrawable(Resources.java:2130)
            at android.content.res.Resources.getDrawable(Resources.java:711)
            at android.graphics.drawable.StateListDrawable.inflate(StateListDrawable.java:176)
            at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:937)
            at android.graphics.drawable.Drawable.createFromXml(Drawable.java:877)
            at android.content.res.Resources.loadDrawable(Resources.java:2130)
            at android.content.res.Resources.getDrawable(Resources.java:711)
            at android.graphics.drawable.StateListDrawable.inflate(StateListDrawable.java:176)
            at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:937)
            at android.graphics.drawable.Drawable.createFromXml(Drawable.java:877)
            at android.content.res.Resources.l

任何帮助都会很棒。

谢谢,Devin

Answer 1

<item>没有属性android:background。这里列出了所有字段。

如果你只想要在项目被点击时改变背景，将ImageView的android:src更改为@drawable/image_gray，并将其android:background更改为仅在@color/gray和@color/black之间切换的选择器。

它看起来像这样:

  <ImageView
  android:id="@+id/image_btn"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:clickable="true"
  android:background="@drawable/background_selector"
  android:src="@drawable/image_gray"/>

其中background_selector.xml类似于

<selector xmlns:android="http://schemas.android.com/apk/res/android">
  <item
    android:state_pressed="true"
    android:drawable="@color/gray"/>
  <item
    android:drawable="@color/black"/>
</selector>

另外，如果您的ImageView是可点击的，请考虑将其更改为ImageButton。

Answer 2

对于那些好奇的人，我将ImageView更改为ImageButton。当我通过代码将ImageButton的state_selected设置为true时，它确实将背景颜色设置为选择器项中设置的任何颜色:

<item
  android:state_selected="true"
  android:drawable="@color/gray"/>

但是，当然，要取消选中它，您必须将state_selected设置为false。这将通过以下命令完成:imageButton.setSelected(<true or false>);这个状态是专门为ImageButton s创建的，如下所示。