Android Studio中的setBackgroundResource需要drawable,而不是int

时间:2015-07-01 13:07:05

标签: android

我正在尝试以编程方式实现一些ImageView按钮,因此我可以在运行时对它们进行排序。

我使用名为image_bg的布局资源作为XML按钮的背景,如activity_main.xml中所示:

   <ImageView android:layout_margin="1dp"
        android:clickable="true"
        android:layout_weight="1"
        android:layout_width="0dp"
        android:id="@+id/imageButton"
        android:src="@drawable/a"
        android:background="@layout/image_bg"
        android:scaleType="fitCenter"/>

尝试以编程方式将背景设置为layout / image_bg,我遇到了这个错误:

img

无论我使用什么组合命令,我都无法设置布局文件的背景。我进行了广泛的搜索,并尝试了getResources().getDrawable(R.layout.image_bg)的各种组合,并使用了setBackground(R.layout.image_bg) - 但到目前为止我没有运气。

编辑:--------------------------------------------- ---

按照建议将image_bg.xml文件移动到R.drawable后,修复了语法错误,但在运行时发生了以下错误:

java.lang.RuntimeException: Unable to start activity ComponentInfo{m.fugl/m.fugl.MainActivity}: android.content.res.Resources$NotFoundException: Resource ID #0x7f02006a

image_bg.xml的内容:

<?xml version="1.0" encoding="UTF-8" ?>
  <shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:background="@android:color/transparent"
    android:layout_height="match_parent"
    android:layout_width="match_parent">
  <solid android:color="#000000" />
  <stroke android:width="1dp" android:color="#776da8"/>
  <corners android:bottomRightRadius="3dp" android:bottomLeftRadius="3dp" android:topLeftRadius="3dp" android:topRightRadius="3dp" />
  <padding android:left="2dp" android:top="2dp" android:right="2dp" android:bottom="2dp" />
  </shape>

我已经尝试过运行gradlew clean,但它没有帮助。

EDIT2 ---------------------------------------------- -----:

尝试将我的image_bg.xml文件更改为:

<?xml version="1.0" encoding="UTF-8" ?>
  <shape xmlns:android="http://schemas.android.com/apk/res/android">
  <solid android:color="#000000" />
  <stroke android:width="1dp" android:color="#776da8"/>
  <corners android:bottomRightRadius="3dp" android:bottomLeftRadius="3dp" android:topLeftRadius="3dp" android:topRightRadius="3dp" />
  <padding android:left="2dp" android:top="2dp" android:right="2dp" android:bottom="2dp" />
  </shape>

我仍然收到错误。整个堆栈跟踪:

07-01 18:14:58.817      977-977/m.fugl E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: m.fugl, PID: 977
    java.lang.RuntimeException: Unable to start activity ComponentInfo{m.fugl/m.fugl.MainActivity}: android.content.res.Resources$NotFoundException: Resource ID #0x7f02006a
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2329)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2389)
            at android.app.ActivityThread.access$900(ActivityThread.java:147)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1296)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5254)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:898)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:693)
     Caused by: android.content.res.Resources$NotFoundException: Resource ID #0x7f02006a
            at android.content.res.Resources.getValue(Resources.java:1310)
            at android.content.res.Resources.getDrawable(Resources.java:790)
            at android.content.res.Resources.getDrawable(Resources.java:770)
            at android.content.Context.getDrawable(Context.java:402)
            at android.view.View.setBackgroundResource(View.java:16105)
            at m.fugl.SoundButton.<init>(SoundButton.java:58)
            at m.fugl.MainActivity.onCreate(MainActivity.java:111)
            at android.app.Activity.performCreate(Activity.java:5933)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2282)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2389)
            at android.app.ActivityThread.access$900(ActivityThread.java:147)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1296)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5254)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:898)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:693)

EDIT3 ---------------------------------:

Soundbutton是一个包含Imageview,声音和用于播放声音的各种方法的类。这是它的构造函数:

SoundButton(int uri, Context context, int src, CharSequence text) {
        //Binder lyd og knap til constructor parametre
        globalUri = uri;
        globalContext = context;
        globalText = text;
        buttonId = new ImageView(context);

        createSoundForButton();

        buttonId.setImageResource(src);
        buttonId.setBackgroundResource(R.drawable.image_bg);
        buttonId.setClickable(true);
        buttonId.setHapticFeedbackEnabled(true);
        buttonId.setLongClickable(false);
        buttonId.setHovered(false);
        setButtonIsPlaying(false);
        setVisible(false);

        // Når der trykkes på knappen....
        buttonId.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(final View v) {
                playOrPauseSound();
            }
        });

        buttonId.setLongClickable(true);

        buttonId.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View view) {
                PopupMenu popupMenu = new PopupMenu(globalContext, view);
                popupMenu.setOnMenuItemClickListener(SoundButton.this);
                popupMenu.inflate(R.menu.popup_menu);
                popupMenu.show();
                buttonId.setBackgroundColor(Color.BLUE);
                popupMenu.setOnDismissListener(new PopupMenu.OnDismissListener() {
                    @Override
                    public void onDismiss(PopupMenu menu) {
                        setButtonIsPlaying(false);
                    }
                });
                return true;
            }
        });
    }

问题应该在58号线上:     buttonId.setBackgroundResource(R.drawable.image_bg);

EDIT4 ---------------------------------: 我找到了答案。我将image_bg.xml文件从Android Studio内部复制到drawables文件夹,这使它落在drawable-large-mdpi文件夹中,而不是drawable文件夹。将image_bg.xml复制到drawable文件夹后,它现在可以工作了,因为编译器可以找到xml文件!

3 个答案:

答案 0 :(得分:2)

查看您发布的图片,您正在提供mContext的值,而正在等待来自R.layout的int。

R.drawable应该是R.layout.image_bg,希望您将R.drawable.image_bg放在其中一个可绘制文件夹中

答案 1 :(得分:0)

  

将图片放入可绘制文件夹

myImgView.setBackgroundResource(R.drawable.image_bg);

myImgView.setImageDrawable(getResources().getDrawable(R.drawable.image_bg));

答案 2 :(得分:0)

您无法将布局设置为背景

您需要将图像放在drawable文件夹中,然后使用getResources().getDrawable(R.layout.image_bg)

然后

setBackground(R.layout.image_bg)