エラー:(90、58）エラー：シンボル変数の描画可能なものを見つけることができません

Question

私はAndroid開発用のJavaで初心者です。私は "ダミーのためのAndroidアプリケーション開発"という本を読んでいます。この本の第5章では、動作していない次のコードスニペットが与えられています。

誰かが私がコード内で間違っていることを知ってもらえますか？ すべての助力に感謝します。

package helloandroid.android.dummies.com.silentmodetoggle; 

import android.support.v7.app.AppCompatActivity; 

import android.graphics.drawable.Drawable; 

import android.media.AudioManager; 

import android.os.Bundle; 

import android.view.View; 

import android.widget.Button; 

import android.widget.ImageView; 


public class MainActivity extends AppCompatActivity { 

private AudioManager mAudioManager; 
private boolean mPhoneIsSilent; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    setButtonClickListener(); 

    mAudioManager = (AudioManager) getSystemService(AUDIO_SERVICE); 

    checkIfPhoneIsSilent(); 

    setButtonClickListener(); 

} 

private void setButtonClickListener() { 


    Button toggleButton = (Button) findViewById(R.id.toggleButton); 
    toggleButton.setOnClickListener(new View.OnClickListener() { 

     public void onClick(View v) { 

      if (mPhoneIsSilent) { 
       //Change back to silent mode 

       mAudioManager 
         .setRingerMode(AudioManager.RINGER_MODE_NORMAL); 
       mPhoneIsSilent = false; 
      } else { 
       // Change to silent mode 

       mAudioManager 
         .setRingerMode(AudioManager.RINGER_MODE_SILENT); 
       mPhoneIsSilent = true; 


      } 
      // Now toggle the UI again 

      toggleUI(); 


     } 
    }); 
} 

/** 
* Checks to see if the phone is currently in silent mode 
*/ 
private void checkIfPhoneIsSilent() { 

    int ringerMode = mAudioManager.getRingerMode(); 
    if (ringerMode == AudioManager.RINGER_MODE_SILENT) { 

     mPhoneIsSilent = true; 
    } else { 

     mPhoneIsSilent = false; 

    } 

} 

/** 
* Toggles the UI images from silent to normal and vice versa 
*/ 
private void toggleUI() { 

    ImageView imageView = (ImageView) findViewById(R.id.phone_icon); 
    Drawable newPhoneImage; 

    if (mPhoneIsSilent) { 
     newPhoneImage = getResources(drawable.phone_silent 

    } 
    else { 
     newPhoneImage = 
       getResources(drawable.phone_on); 
    } 

    imageView.setImageDrawable(newPhoneImage); 

} 

@Override 
protected void onResume() { 
    super.onResume(); 
    checkIfPhoneIsSilent(); 
    toggleUI(); 
} 
} 

何か親切に助けてください。 ありがとうございます。

UPDATE 

10-12 13:53:28.672 2965-2965/? D/dalvikvm: Not late-enabling CheckJNI (already on) 

10-12 13:53:28.692 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle E/Trace: error 

opening trace file: No such file or directory (2) 


10-12 13:53:28.703 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle I/dalvikvm: 

Could not 

find method android.app.Application.registerOnProvideAssistDataListener, 

referenced from method 

    com.android.tools.fd.runtime.BootstrapApplication.registerOnProvideAssistDataListener 

10-12 13:53:28.703 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle W/dalvikvm: VFY: 

unable to resolve virtual method 231: Landroid/app 

/Application;.registerOnProvideAssistDataListener (Landroid/app 

/Application$OnProvideAssistDataListener;) 


10-12 13:53:28.703 2965-2965/helloandroid.android.dummies.com.silentmodetoggle D/dalvikvm: VFY: 

replacing opcode 0x6e at 0x0002 


10-12 13:53:28.703 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle I/dalvikvm: Could 

not find method 

android.app.Application.unregisterOnProvideAssistDataListener, referenced 

from method 

com.android.tools.fd.runtime.BootstrapApplication.unregisterOnProvideAssistDataLis 

tener 

10-12 13:53:28.703 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle W/dalvikvm: VFY: 

unable to resolve virtual method 234: Landroid/app 

/Application;.unregisterOnProvideAssistDataListener (Landroid/app 

/Application$OnProvideAssistDataListener;)V 

10-12 13:53:28.703 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle D/dalvikvm: VFY: 

replacing opcode 0x6e at 0x0002 

10-12 13:53:28.703 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle I/InstantRun: 

Instant Run Runtime started. Android package is 

helloandroid.android.dummies.com.silentmodetoggle, real application class is 

null。

10-12 13:53:28.703 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle W/InstantRun: No 

instant run dex files added to classpath 


10-12 13:53:28.703 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle E/dalvikvm: Could 

not find class 'android.util.ArrayMap', referenced from method 

com.android.tools.fd.runtime.MonkeyPatcher.monkeyPatchExistingResources 


10-12 13:53:28.703 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle W/dalvikvm: VFY: 

unable to resolve check-cast 1884 (Landroid/util/ArrayMap;) in Lcom/android 

/tools/fd/runtime/MonkeyPatcher; 


10-12 13:53:28.703 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle D/dalvikvm: VFY: 

replacing opcode 0x1f at 0x025e 


10-12 13:53:28.703 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle E/dalvikvm: Could 

not find class 'android.util.ArrayMap', referenced from method 

com.android.tools.fd.runtime.MonkeyPatcher.pruneResourceCache 


10-12 13:53:28.703 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle W/dalvikvm: VFY: 

unable to resolve const-class 1884 (Landroid/util/ArrayMap;) in Lcom/android 

/tools/fd/runtime/MonkeyPatcher; 


10-12 13:53:28.703 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle D/dalvikvm: VFY: 

replacing opcode 0x1c at 0x0060 


10-12 13:53:28.732 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle I/dalvikvm: Could 

not find method android.view.Window$Callback.onProvideKeyboardShortcuts,  

referenced from method  

android.support.v7.view.WindowCallbackWrapper.onProvideKeyboardShortcuts 


10-12 13:53:28.732 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle W/dalvikvm: VFY: 

unable to resolve interface method 15983: Landroid/view 

/Window$Callback;.onProvideKeyboardShortcuts (Ljava/util/List;Landroid 

/view/Menu;I)V 


10-12 13:53:28.732 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle D/dalvikvm: VFY: 

replacing opcode 0x72 at 0x0002 


10-12 13:53:28.732 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle W/dalvikvm: VFY: 

unable to find class referenced in signature (Landroid/view/SearchEvent;) 


10-12 13:53:28.732 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle I/dalvikvm: Could 

not find method android.view.Window$Callback.onSearchRequested, referenced 

from method android.support.v7.view.WindowCallbackWrapper.onSearchRequested 


10-12 13:53:28.732 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle W/dalvikvm: VFY: 

unable to resolve interface method 15985: Landroid/view 

/Window$Callback;.onSearchRequested (Landroid/view/SearchEvent;)Z 


10-12 13:53:28.732 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle D/dalvikvm: VFY: 

replacing opcode 0x72 at 0x0002 


10-12 13:53:28.732 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle I/dalvikvm: Could 

not find method android.view.Window$Callback.onWindowStartingActionMode, 

referenced from method 

android.support.v7.view.WindowCallbackWrapper.onWindowStartingActionMode 


10-12 13:53:28.732 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle W/dalvikvm: VFY: 

unable to resolve interface method 15989: Landroid/view 

/Window$Callback;.onWindowStartingActionMode (Landroid/view 

/ActionMode$Callback;I)Landroid/view/ActionMode; 


10-12 13:53:28.732 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle D/dalvikvm: VFY: 

replacing opcode 0x72 at 0x0002 


10-12 13:53:28.732 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle I/dalvikvm: Could 

not find method android.content.res.TypedArray.getChangingConfigurations, 

referenced from method 

android.support.v7.widget.TintTypedArray.getChangingConfigurations 


10-12 13:53:28.732 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle W/dalvikvm: VFY: 

unable to resolve virtual method 669: Landroid/content 

/res/TypedArray;.getChangingConfigurations()I 


10-12 13:53:28.732 


2965-2965/helloandroid.android.dummies.com.silentmodetoggle D/dalvikvm: VFY: 

replacing opcode 0x6e at 0x0002 


10-12 13:53:28.732 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle I/dalvikvm: Could 

not find method android.content.res.TypedArray.getType, referenced from 

method android.support.v7.widget.TintTypedArray.getType 


10-12 13:53:28.732 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle W/dalvikvm: VFY: 

unable to resolve virtual method 691: Landroid/content 

/res/TypedArray;.getType (I)I 


10-12 13:53:28.732 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle D/dalvikvm: VFY: 

replacing opcode 0x6e at 0x0008 


10-12 13:53:28.732 

2965-2965/helloandroid.android.dummies.com.silentmodetoggle 

E/VdcInflateDelegate: Exception while inflating <vector 

org.xmlpull.v1.XmlPullParserException: Binary XML file line #17<vector> 

tag requires viewportHeight > 0 
at 

android.support.graphics.drawable.VectorDrawableCompat.updateStateFromTypedArray（

VectorDrawableCompat.java:544) 
at 
android.support.graphics.drawable.VectorDrawableCompat.inflate 

(VectorDrawableCompat.java:478) 
at  

android.support.graphics.drawable.VectorDrawableCompat.createFromXmlInner

(VectorDrawableCompat.java:441) 
at android.support.v7.widget.AppCompatDrawableManager$VdcInflateDelegate.createFromXmlInner(AppCompatDrawableManager.java:742) 
at android.support.v7.widget.AppCompatDrawableManager.loadDrawableFromDelegates(AppCompatDrawableManager.java:362) 
at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:192) 
at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:185) 
at android.support.v7.widget.AppCompatDrawableManager.checkVectorDrawableSetup(AppCompatDrawableManager.java:720) 
at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:190) 
at android.support.v7.widget.TintTypedArray.getDrawableIfKnown(TintTypedArray.java:77) 
at 

android.support.v7.app.AppCompatDelegateImplBase.<init>(AppCompatDelegateImplBase.java:127) 
at android.support.v7.app.AppCompatDelegateImplV9.<init 
(AppCompatDelegateImplV9.java:147) 
at android.support.v7.app.AppCompatDelegateImplV11.<init> 

(AppCompatDelegateImplV11.java:27) 
at android.support.v7.app.AppCompatDelegateImplV14.<init> 

(AppCompatDelegateImplV14.java:50) 
    at 

android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:201) 
    at 

android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:181) 
    at 

android.support.v7。 app.AppCompatActivity.getDelegate（AppCompatActivity.java:521） at

012 dalvik.systemでcom.android.internal.os.ZygoteInit.mainで

android.support.v7.app.AppCompatActivity.onCreate(AppCompatActivity.java:71) 
    at 

helloandroid.android.dummies.com.silentmodetoggle.MainActivity.onCreate(MainActivity.java:18) 
at android.app.Activity.performCreate(Activity.java:5008) 
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079) 
at  

android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023) 
    at 

android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084) 
    at 

android.app.ActivityThread.access$600(ActivityThread.java:130) 
    at 

android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195) 
                        at android.os.Handler.dispatchMessage(Handler.java:99) 
                        at android.os.Looper.loop(Looper.java:137) 
    at android.app.ActivityThread.main(ActivityThread.java:4745) 
    at java.lang.reflect.Method.invokeNative(Native Method) 
    at java.lang.reflect.Method.invoke(Method.java:511) 
    at 

com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:786） （ZygoteInit.java:553） .NativeStart.main（ネイティブメト 10-12 13：53：28.732 com.android.internalで

2965-2965/helloandroid.android.dummies.com.silentmodetoggle 

D/AndroidRuntime: Shutting down VM 

10-12 13:53:28.732 
2965-2965/helloandroid.android.dummies.com.silentmodetoggle W/dalvikvm: 
threadid=1: thread exiting with uncaught exception (group=0xb2e51288) 
10-12 13:53:28.732 
2965-2965/helloandroid.android.dummies.com.silentmodetoggle 

E/AndroidRuntime: 
FATAL EXCEPTION: main 
java.lang.RuntimeException: Unable to start activity 
    ComponentInfo{helloandroid.android.dummies.com.silentmodetoggle/helloandroid.andro 
id.dummies.com.silentmodetoggle.MainActivity}:     
android.content.res.Resources$NotFoundException: File res/drawable 
/abc_vector_test.xml from drawable resource ID #0x7f02005 
at 
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059 
at 
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084) 
at 
android.app.ActivityThread.access$600(ActivityThread.java:13 
at 
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195) 
at android.os.Handler.dispatchMessage(Handler.java:99) 
at android.os.Looper.loop(Looper.java:137) 
at android.app.ActivityThread.main(ActivityThread.java:4745) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:511) 
at  

com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:786） .os.ZygoteInit.main（ZygoteInit.java:553） at dalvik.system.NativeStart.main（ネイティブメソッド） 原因：android.content.re s.Resources $ NotFoundException：ファイルのres /描画可能

/abc_vector_test.xml from drawable resource ID #0x7f020052 
at android.content.res.Resources.loadDrawable(Resources.java:1918) 
at android.content.res.Resources.getDrawable(Resources.java:659) 
at 

android.support.v4.content.ContextCompat.getDrawable(ContextCompat.java:346) 
at 

android.support.v7.widget.AppCompatDrawableManager.getDrawableでandroid.support.v7.widget.AppCompatDrawableManager.getDrawable（AppCompatDrawableManager.java:197） （AppCompatDrawableManager .javaファイル：android.supportでandroid.support.v7.widget.AppCompatDrawableManager.getDrawable（AppCompatDrawableManager.java:190） でandroid.support.v7.widget.AppCompatDrawableManager.checkVectorDrawableSetup（AppCompatDrawableManager.java:720） で185） （） android.support.v7.app.AppCompatDelegateImplV9で（AppCompatDelegateImplBase.java:127） 。（AppCompatDelegateImplV9.java:147）android.support.v7.app.AppCompatDelegateImplV11で 。（AppCompatDelegateImplV11.java:27） android.supportで.v7.app.AppCompatDelegateImplV14。（AppCompatDelegateImplV14。Javaの：50）

android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:201) 
     at 

android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:181) 
     at android.support.v7.app.AppCompatActivity.getDelegate(AppCompatActivity.java:521) 
     at android.support.v7.app.AppCompatActivity.onCreate(AppCompatActivity.java:71) 
     at helloandroid.android.dummies.com.silentmodetoggle.MainActivity.onCreate(MainActivity.java:18) 
      at android.app.Activity.performCreate(Activity.java:5008) 
     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079) 
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023) 
     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)  
     at android.app.ActivityThread.access$600(ActivityThread.java:130)  
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)  
     at android.os.Handler.dispatchMessage(Handler.java:99)  
     at android.os.Looper.loop(Looper.java:137)  
     at android.app.ActivityThread.main(ActivityThread.java:4745)  
     at java.lang.reflect.Method.invokeNative(Native Method)  
     at java.lang.reflect.Method.invoke(Method.java:511)  
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)  
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)  
     at dalvik.system.NativeStart.main(Native Method)  
     Caused by: org.xmlpull.v1.XmlPullParserException: Binary XML file line #17: invalid drawable tag vector 
     at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:877) 
      at android.graphics.drawable.Drawable.createFromXml(Drawable.java:818) 
     at android.content.res.Resources.loadDrawable(Resources.java:1915) 
     at android.content.res.Resources.getDrawable(Resources.java:659)  
     at android.support.v4.content.ContextCompat.getDrawable(ContextCompat.java:346)  
     at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:197)  
     at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:185)  
     at android.support.v7.widget.AppCompatDrawableManager.checkVectorDrawableSetup(AppCompatDrawableManager.java:720)  
     at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:190)  
     at android.support.v7.widget.TintTypedArray.getDrawableIfKnown(TintTypedArray.java:77)  
     at android.support.v7.app.AppCompatDelegateImplBase.<init>(AppCompatDelegateImplBase.java:127)  
     at android.support.v7.app.AppCompatDelegateImplV9.<init>(AppCompatDelegateImplV9.java:147)  
      at android.support.v7.app.AppCompatDelegateImplV11.<init>(AppCompatDelegateImplV11.java:27)  
      at android.support.v7.app.AppCompatDelegateImplV14.<init>(AppCompatDelegateImplV14.java:50)  
      at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:201)  
      at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:181)  
      at android.support.v7.app.AppCompatActivity.getDelegate(AppCompatActivity.java:521)  
      at android.support.v7.app.AppCompatActivity.onCreate(AppCompatActivity.java:71)  
      at helloandroid.android.dummies.com.silentmodetoggle.MainActivity.onCreate(MainActivity.java:18)  
      at android.app.Activity.performCreate(Activity.java:5008)  
      at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)  
      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)  
      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)  
      at android.app.ActivityThread.access$600(ActivityThread.java:130)  
      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)  
      at android.os.Handler.dispatchMessage(Handler.java:99)  
      at android.os.Looper.loop(Looper.java:137)  
      at android.app.ActivityThread.main(ActivityThread.java:4745)  
      at java.lang.reflect.Method.invokeNative(Native Method)  
      at java.lang.reflect.Method.invoke(Method.java:511)  
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)  
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)  
      at dalvik.system.NativeStart.main(Native Method)  
10-12 13:53:28.752 

2965-2969/helloandroid.android.dummies.com.silentmodetoggle D/dalvikvm: 

GC_CONCURRENT freed 305K, 7% free 6071K/6471K, paused 16ms+1ms, total 18ms 

10-12 13:53:31.472 2965-2965/? I/Process: Sending signal. PID: 2965 SIG: 9 

The above is the Exception Logcat which I found very difficult to paste However, somehow I managed. Your updated and edited answer is giving an error at the "else" block.

Answer 1

では、迅速な応答をありがとう、この

private void toggleUI() { 

    ImageView imageView = (ImageView) findViewById(R.id.phone_icon); 
    if (imageView != null) { 
     int imageResId = mPhoneIsSilent ? R.drawable.phone_silent : R.drawable.phone_on; 
     imageView.setImageResource(imageResId); 
    } else { 
     Log.e("ERR", "ImageView is null"); 
    } 
}