Question

我最近除了将png图像（mdpi，hdpi，xhdpi和xxhdpi）添加到我的android studio项目中，将矢量可绘制对象（anydpi）添加到我的android studio项目中。

我立即开始收到此错误：

2019-02-10 23:10:25.870 2722-2722/? E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.test, PID: 2722
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.test/com.example.test.SettingsActivity}: android.content.res.Resources$NotFoundException: Drawable com.example.test:drawable/back_button with resource ID #0x7f080073
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2951)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3086)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1816)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6718)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
     Caused by: android.content.res.Resources$NotFoundException: Drawable com.example.test:drawable/back_button with resource ID #0x7f080073
     Caused by: android.content.res.Resources$NotFoundException: File res/drawable/back_button.xml from drawable resource ID #0x7f080073
        at android.content.res.ResourcesImpl.loadDrawableForCookie(ResourcesImpl.java:847)
        at android.content.res.ResourcesImpl.loadDrawable(ResourcesImpl.java:631)
        at android.content.res.Resources.getDrawableForDensity(Resources.java:888)
        at android.content.res.Resources.getDrawable(Resources.java:827)
        at android.content.Context.getDrawable(Context.java:635)
        at android.support.v4.content.ContextCompat.getDrawable(ContextCompat.java:463)
        at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:203)
        at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:191)
        at android.support.v7.content.res.AppCompatResources.getDrawable(AppCompatResources.java:102)
        at android.support.v7.widget.ToolbarWidgetWrapper.setNavigationIcon(ToolbarWidgetWrapper.java:599)
        at android.support.v7.app.ToolbarActionBar.setHomeAsUpIndicator(ToolbarActionBar.java:161)
        at com.example.test.SettingsActivity.setUpToolbarAndActionBar(SettingsActivity.java:642)
        at com.example.test.SettingsActivity.onCreate(SettingsActivity.java:159)
        at android.app.Activity.performCreate(Activity.java:7144)
        at android.app.Activity.performCreate(Activity.java:7135)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2931)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3086)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1816)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6718)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
     Caused by: org.xmlpull.v1.XmlPullParserException: Binary XML file line #4: <bitmap> requires a valid 'src' attribute
        at android.graphics.drawable.BitmapDrawable.updateStateFromTypedArray(BitmapDrawable.java:849)
        at android.graphics.drawable.BitmapDrawable.inflate(BitmapDrawable.java:770)
2019-02-10 23:10:25.870 2722-2722/? E/AndroidRuntime:     at android.graphics.drawable.DrawableInflater.inflateFromXmlForDensity(DrawableInflater.java:142)
        at android.graphics.drawable.Drawable.createFromXmlInnerForDensity(Drawable.java:1332)
        at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:1321)
        at android.graphics.drawable.StateListDrawable.inflateChildElements(StateListDrawable.java:194)
        at android.graphics.drawable.StateListDrawable.inflate(StateListDrawable.java:122)
        at android.graphics.drawable.DrawableInflater.inflateFromXmlForDensity(DrawableInflater.java:142)
        at android.graphics.drawable.Drawable.createFromXmlInnerForDensity(Drawable.java:1332)
        at android.graphics.drawable.Drawable.createFromXmlForDensity(Drawable.java:1291)
        at android.content.res.ResourcesImpl.loadDrawableForCookie(ResourcesImpl.java:833)
            ... 27 more

错误导致我的代码出现在这里：

Toolbar toolbar = (Toolbar)findViewById(R.id.toolbar_settings);
setSupportActionBar(toolbar);

ActionBar actionBar = getSupportActionBar();

actionBar.setDisplayHomeAsUpEnabled(true);
int drawable = R.drawable.back_button;
actionBar.setHomeAsUpIndicator(drawable); // ERROR IS HERE
toolbar.setNavigationIcon(drawable);

上面的代码在活动的onCreate中调用，在该活动中，我将自定义可绘制对象（R.drawable.back_button）设置为活动的后退按钮。

但是，R.drawable.back_button是一个可绘制资源文件，它在按下时会更改可绘制对象：

<selector
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="false">
        <bitmap
            android:src="@drawable/back">
        </bitmap>
    </item>
    <item android:state_pressed="true">
        <bitmap
            android:src="@drawable/back"
            android:tint="@color/colorAccent">
        </bitmap>
    </item>
</selector>

除了android：src之外，我还尝试使用app：srcCompat来代替，但仍然出现错误。

drawable.back由5个不同dpi的文件组成：anydpi（矢量），mdpi，hdpi，xhdpi和xxhdpi。

我的gradle设置：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    buildToolsVersion '28.0.3'
    defaultConfig {
        applicationId "com.example.test"
        minSdkVersion 17
        targetSdkVersion 28
        versionCode 5
        versionName "1.1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        vectorDrawables.useSupportLibrary = true
        renderscriptTargetApi 24
        renderscriptSupportModeEnabled true
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            zipAlignEnabled true
        }
    }
    lintOptions {
        checkReleaseBuilds false
        abortOnError false
    }
}

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    implementation('com.android.support:appcompat-v7:28.0.0') { force = true }
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    implementation('com.android.support:design:28.0.0') { force = true }
    implementation('com.android.support:support-v4:28.0.0') { force = true }
    implementation('com.android.support:support-vector-drawable:28.0.0') { force = true }
    testImplementation 'junit:junit:4.12'
    implementation("com.android.support:support-compat:28.0.0") { force = true }
    implementation 'com.squareup.picasso:picasso:2.71828'
    implementation 'commons-io:commons-io:2.5'
    implementation 'com.android.support:exifinterface:28.0.0'
    implementation 'com.android.support:cardview-v7:28.0.0'
}

也很有趣：当我将在onCreate中设置的可绘制对象更改为R.drawable.back（直接使用可绘制对象而不是使用资源文件R.drawable.back_button）时，没有错误。因此崩溃似乎是由于在可绘制资源文件中使用了矢量可绘制对象。

更新：

我遇到的另一个错误：

在R.drawable.back_button中，当我仅使用android：src时，出现错误：

<bitmap
    android:src="@drawable/back" <!-- ERROR: When using VectorDrawableCompat, you need to use srcCompat-->
    android:tint="@color/colorAccent"/>

但是当我使用srcCompat

<bitmap <!-- ERROR: required attribute src should be defined-->
    app:srcCompat="@drawable/back"
    android:tint="@color/colorAccent"/>

同时使用src和srcCompat都不起作用。

Answer 1

您的代码没有问题，我们需要在每个drawable文件夹示例中添加@ drawable / back，例如“ main / res / drawable-xxhdpi”，“ main / res / drawable-xhdpi”等那么它将起作用。（即每个尺寸，例如：hdpi，mdpi，xxhdpi..etc）

我们可以按照以下步骤使用android studio在每个文件夹中添加back.png

单击“文件”，然后单击“新建”，然后单击“图像资产”

将“资产类型”更改为“操作栏和标签图标”

对于“前景”，选择“剪贴画”

对于“ Clipart”，请单击“选择”按钮，然后选择任何图标

对于“资源名称”，请输入图标文件名

6。单击“下一步”，将生成所有尺寸的图像（hdpi，mdpi，xxhdpi..etc）

Answer 2

Drawable icon = AppCompatResources.getDrawable(context, R.drawable. back_button);
actionBar.setHomeAsUpIndicator(icon);

，然后在下方设置为“创建”

AppCompatDelegate.setCompatVectorFromResourcesEnabled(true);

Resources $ NotFoundException：资源ID为＃0x7f080073的Drawable com.example.test：drawable / back_button

2 个答案: