扩展类android.support.v7.widget.AppCompatTextView

Question

我正在为Vector Drawable开发一个简单的例子。我使用向后兼容的库com.android.support:appcompat-v7:25.1.1来支持前Lollipop设备。

布局中使用的视图是：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.nm.vectordrawableexample.VectorActivity">

    <ImageView android:id="@+id/ic_logo"
        android:layout_width="150dp"
        android:layout_height="150dp"
        android:layout_gravity="center_horizontal"
        android:layout_marginBottom="30dp"
        android:layout_marginTop="30dp"
        app:srcCompat="@drawable/ic_light_bulb" />

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="10dp"
        android:gravity="center_horizontal"
        android:text="Tap on icon to change tint color" />

    <android.support.v7.widget.AppCompatImageView
        android:id="@+id/ic_android"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginBottom="30dp" />

    <android.support.v7.widget.AppCompatTextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginBottom="20dp"
        android:drawableLeft="@drawable/ic_flight_takeoff"
        android:gravity="center_horizontal"
        android:text="TextView with Vector Drawable" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:text="Radio button with vector drawable icons" />

    <RadioGroup
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:showDividers="middle"
        android:orientation="horizontal"
        android:gravity="center">

        <android.support.v7.widget.AppCompatRadioButton
            android:id="@+id/radioBtn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="10dp"
            android:background="@drawable/radio_selector"
            android:button="@android:color/transparent" />

        <android.support.v7.widget.AppCompatRadioButton
            android:id="@+id/radioBtn2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="10dp"
            android:background="@drawable/radio_selector"
            android:button="@android:color/transparent" />

        <android.support.v7.widget.AppCompatRadioButton
            android:id="@+id/radioBtn3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="10dp"
            android:background="@drawable/radio_selector"
            android:button="@android:color/transparent" />

        <android.support.v7.widget.AppCompatRadioButton
            android:id="@+id/radioBtn4"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="10dp"
            android:background="@drawable/radio_selector"
            android:button="@android:color/transparent" />

        <android.support.v7.widget.AppCompatRadioButton
            android:id="@+id/radioBtn5"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="10dp"
            android:background="@drawable/radio_selector"
            android:button="@android:color/transparent" />

    </RadioGroup>

</LinearLayout>

以下是在ImageView上单击更改ImageView中使用的图像颜色的活动的代码段：

public class VectorActivity extends AppCompatActivity {

    static {
        AppCompatDelegate.setCompatVectorFromResourcesEnabled(true);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_vector);
        final AppCompatImageView icAndroid= (AppCompatImageView) findViewById(R.id.ic_android);
        icAndroid.setImageResource(R.drawable.ic_android);
        icAndroid.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Random random=new Random();
                int color= Color.argb(255,random.nextInt(256),random.nextInt(256),random.nextInt(256));
                icAndroid.setColorFilter(color);
            }
        });
    }
}

以下是样式文件内容说明：

<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

</resources>

现在在Android 5.0+设备上执行示例的问题（下面给出设备描述）

• 华硕Zenfone Max（Android版本6.0）。

• GenyMotion仿真器（三星Galaxy S7 Android版本6.0 API 23）

示例成功执行并显示结果。 但是在此设备上执行相同的示例时：

• GenyMotion仿真器HTC One 4.4.4 API 19（480dpi）

它显示运行时异常并且应用程序已停止。

FATAL EXCEPTION: main
 Process: com.nm.vectordrawableexample, PID: 1351
 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.nm.vectordrawableexample/com.nm.vectordrawableexample.VectorActivity}: android.view.InflateException: Binary XML file line #38: Error inflating class android.support.v7.widget.AppCompatTextView
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184)
     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
     at android.app.ActivityThread.access$800(ActivityThread.java:135)
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
     at android.os.Handler.dispatchMessage(Handler.java:102)
     at android.os.Looper.loop(Looper.java:136)
     at android.app.ActivityThread.main(ActivityThread.java:5001)
     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:785)
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
     at dalvik.system.NativeStart.main(Native Method)
  Caused by: android.view.InflateException: Binary XML file line #38: Error inflating class android.support.v7.widget.AppCompatTextView
     at android.view.LayoutInflater.createView(LayoutInflater.java:620)
     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)
     at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
     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 android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:288)
     at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
     at com.nm.vectordrawableexample.VectorActivity.onCreate(VectorActivity.java:21)
     at android.app.Activity.performCreate(Activity.java:5231)
     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)
     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233) 
     at android.app.ActivityThread.access$800(ActivityThread.java:135) 
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 
     at android.os.Handler.dispatchMessage(Handler.java:102) 
     at android.os.Looper.loop(Looper.java:136) 
     at android.app.ActivityThread.main(ActivityThread.java:5001) 
     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:785) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601) 
     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 android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696) 
     at android.view.LayoutInflater.rInflate(LayoutInflater.java:755) 
     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 android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:288) 
     at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140) 
     at com.nm.vectordrawableexample.VectorActivity.onCreate(VectorActivity.java:21) 
     at android.app.Activity.performCreate(Activity.java:5231) 
     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148) 
     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233) 
     at android.app.ActivityThread.access$800(ActivityThread.java:135) 
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 
     at android.os.Handler.dispatchMessage(Handler.java:102) 
     at android.os.Looper.loop(Looper.java:136) 
     at android.app.ActivityThread.main(ActivityThread.java:5001) 
     at java.lang.reflect.Method.invokeNative(Native Method) 
     at java.lang.reflect.Method.invoke(Method.java:515) 
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601) 
     at dalvik.system.NativeStart.main(Native Method) 
  Caused by: android.content.res.Resources$NotFoundException: File res/drawable/ic_flight_takeoff.xml from drawable resource ID #0x7f020055
     at android.content.res.Resources.loadDrawable(Resources.java:2096)
     at android.content.res.TypedArray.getDrawable(TypedArray.java:602)
     at android.widget.TextView.<init>(TextView.java:806)
     at android.support.v7.widget.AppCompatTextView.<init>(AppCompatTextView.java:62)
     at android.support.v7.widget.AppCompatTextView.<init>(AppCompatTextView.java:58)
     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 android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696) 
     at android.view.LayoutInflater.rInflate(LayoutInflater.java:755) 
     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 android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:288) 
     at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140) 
     at com.nm.vectordrawableexample.VectorActivity.onCreate(VectorActivity.java:21) 
     at android.app.Activity.performCreate(Activity.java:5231) 
     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148) 
     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233) 
     at android.app.ActivityThread.access$800(ActivityThread.java:135) 
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 
     at android.os.Handler.dispatchMessage(Handler.java:102) 
     at android.os.Looper.loop(Looper.java:136) 
     at android.app.ActivityThread.main(ActivityThread.java:5001) 
     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:785) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601) 
     at dalvik.system.NativeStart.main(Native Method) 
  Caused by: org.xmlpull.v1.XmlPullParserException: Binary XML file line #1: invalid drawable tag vector
     at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:933)
     at android.graphics.drawable.Drawable.createFromXml(Drawable.java:877)
     at android.content.res.Resources.loadDrawable(Resources.java:2092)
     at android.content.res.TypedArray.getDrawable(TypedArray.java:602) 
     at android.widget.TextView.<init>(TextView.java:806) 
     at android.support.v7.widget.AppCompatTextView.<init>(AppCompatTextView.java:62) 
     at android.support.v7.widget.AppCompatTextView.<init>(AppCompatTextView.java:58) 
     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 android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696) 
     at android.view.LayoutInflater.rInflate(LayoutInflater.java:755) 
     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 android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:288) 
     at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140) 
     at com.nm.vectordrawableexample.VectorActivity.onCreate(VectorActivity.java:21) 
     at android.app.Activity.performCreate(Activity.java:5231) 
     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148) 
     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233) 
     at android.app.ActivityThread.access$800(ActivityThread.java:135) 
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 
     at android.os.Handler.dispatchMessage(Handler.java:102) 
     at android.os.Looper.loop(Looper.java:136) 
     at android.app.ActivityThread.main(ActivityThread.java:5001) 
     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:785) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601) 
     at dalvik.system.NativeStart.main(Native Method) 

app / build.gradle文件内容说明

apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    buildToolsVersion "25.0.2"
    defaultConfig {
        applicationId "com.nm.vectordrawableexample"
        minSdkVersion 15
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        vectorDrawables.useSupportLibrary = true
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support:appcompat-v7:25.1.1'
    testCompile 'junit:junit:4.12'
}

代码中的哪个部分出错了？成功运行示例需要进行哪些更改？

Answer 1

看起来像老问题，所以作者可能不等待答案。但问题出在res/drawable/ic_flight_takeoff.xml文件中。

它是一个可绘制的矢量，您可以在build.gradle vectorDrawables.useSupportLibrary = true中设置。

我那个案例矢量drawable不会转换为PNG并按原样使用，因此它会导致Android 5.0之前的版本崩溃（LOLLIPOP）。

Answer 2

在您的活动中添加以下行

static {
        AppCompatDelegate.setCompatVectorFromResourcesEnabled(true);
    }

Answer 3

API 19及以下版本似乎对矢量可绘制对象有困难。因此，您可以以编程方式完成此操作，而不用用XML声明textView的drawableLeft；

1. 创建一个VectorDrawableCompat 像：

   Drawable drawable = VectorDrawableCompat.create(context.getResources(), R.drawable.your_drawable, null);

2. 将drawable设置为textview的drawableLeft，例如：

   your_textView.setCompoundDrawablesWithIntrinsicBounds(drawable, null, null, null)