java - 我的 Android 应用程序在 10 次尝试后崩溃

Question

刚刚开始使用 Android，我的问题出在我正在制作的游戏上。因此，我用狗的图片填充 ImageView ，用户必须猜测狗的品种。所以我想出了如何填充它，但现在我遇到了这个问题，在应用程序崩溃之前我只能重新填充 imageView 10 次。

非常具有描述性，

我启动应用程序，打开将您插入此 Activity 的部分，其中显示图片，您必须选择您认为是的品种

我单击提交转到下一张图片(它不检查答案是否正确。它只是再次运行设置并尝试重新填充 ImageView )

所以我继续这样做，经过 10 次尝试，应用程序退出 Activity 并返回到菜单 Activity。此时我尝试再次进入游戏。

此时此刻。它要么允许我单击“提交”一次，要么单击几次，或者可能多次，但然后一次又一次完全崩溃。

错误代码

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.doggyroulette, PID: 17359
    java.lang.IllegalStateException: Could not execute method for android:onClick
        at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:390)
        at android.view.View.performClick(View.java:7339)
        at android.widget.TextView.performClick(TextView.java:14226)
        at android.view.View.performClickInternal(View.java:7305)
        at android.view.View.access$3200(View.java:846)
        at android.view.View$PerformClick.run(View.java:27787)
        at android.os.Handler.handleCallback(Handler.java:873)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:214)
        at android.app.ActivityThread.main(ActivityThread.java:7094)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:975)
     Caused by: java.lang.reflect.InvocationTargetException
        at java.lang.reflect.Method.invoke(Native Method)
        at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:385)
        at android.view.View.performClick(View.java:7339) 
        at android.widget.TextView.performClick(TextView.java:14226) 
        at android.view.View.performClickInternal(View.java:7305) 
        at android.view.View.access$3200(View.java:846) 
        at android.view.View$PerformClick.run(View.java:27787) 
        at android.os.Handler.handleCallback(Handler.java:873) 
        at android.os.Handler.dispatchMessage(Handler.java:99) 
        at android.os.Looper.loop(Looper.java:214) 
        at android.app.ActivityThread.main(ActivityThread.java:7094) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:975) 
     Caused by: android.content.res.Resources$NotFoundException: Resource ID #0x1
        at android.content.res.ResourcesImpl.getValueForDensity(ResourcesImpl.java:237)
        at android.content.res.Resources.getDrawableForDensity(Resources.java:902)
        at android.content.res.Resources.getDrawable(Resources.java:842)
        at android.content.Context.getDrawable(Context.java:628)
        at com.example.doggyroulette.IdentifyBreedActivity.appSetup(IdentifyBreedActivity.java:146)
        at com.example.doggyroulette.IdentifyBreedActivity.submitAnswer(IdentifyBreedActivity.java:167)
        at java.lang.reflect.Method.invoke(Native Method) 
        at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:385) 
        at android.view.View.performClick(View.java:7339) 
        at android.widget.TextView.performClick(TextView.java:14226) 
        at android.view.View.performClickInternal(View.java:7305) 
        at android.view.View.access$3200(View.java:846) 
        at android.view.View$PerformClick.run(View.java:27787) 
        at android.os.Handler.handleCallback(Handler.java:873) 
        at android.os.Handler.dispatchMessage(Handler.java:99) 
        at android.os.Looper.loop(Looper.java:214) 
        at android.app.ActivityThread.main(ActivityThread.java:7094) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:975) 

主要代码

private void appSetup(){

        breeds = getResources().getStringArray(R.array.breeds);
        int randInt;

        //Hides Next Button
        nextBtn  = findViewById(R.id.nextBtn);
        nextBtn.setVisibility(View.INVISIBLE);

        //Spinner Setup
        spinner = findViewById(R.id.breedDropdown);

        // ArrayAdapter to pass String Array list to Spinner, uses spinner_container.xml as layout
        ArrayAdapter<CharSequence> spinnerArrayAdapter = ArrayAdapter.createFromResource(this, R.array.breeds, R.layout.spinner_container);
        spinnerArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner.setAdapter(spinnerArrayAdapter);


        //Setup for Image View

        randInt = AppUtility.getRandomNumber(1, 10);
        Log.i("Rand_ID", String.valueOf(randInt));


        String filePath = "";
        correctName = breeds[randInt];
        switch (breeds[randInt]){

            case "Australian Terrier":
                Log.i("Breed", breeds[randInt]);
                filePath = "at_"+randInt;

            case "Beagle":
                Log.i("Breed", breeds[randInt]);
                filePath = "b_"+randInt;
                break;

            case "Boxer":
                Log.i("Breed", breeds[randInt]);
                filePath = "boxer_"+randInt;
                break;

            case "Chihuahua":
                Log.i("Breed", breeds[randInt]);
                filePath = "chihuahua_"+randInt;
                break;

            case "Cockerspaniel":
                Log.i("Breed", breeds[randInt]);
                filePath = "cs_"+randInt;
                break;

            case "Doberman":
                Log.i("Breed", breeds[randInt]);
                filePath = "db_"+randInt;
                break;

            case "German Shepherd":
                Log.i("Breed", breeds[randInt]);
                filePath = "gs_"+randInt;
                break;

            case "Golden Retriever":
                Log.i("Breed", breeds[randInt]);
                filePath = "gr_"+randInt;
                break;

            case "Great Dane":
                Log.i("Breed", breeds[randInt]);
                filePath = "gd_"+randInt;
                break;

            case "Labrador Retriever":
                Log.i("Breed", breeds[randInt]);
                filePath = "lr_"+randInt;
                break;

            case "Maltese Dog":
                Log.i("Breed", breeds[randInt]);
                filePath = "md_"+randInt;
                break;

            case "Saint Bernard":
                Log.i("Breed", breeds[randInt]);
                filePath = "sb_"+randInt;
                break;

            case "Schipperke":
                Log.i("Breed", breeds[randInt]);
                filePath = "schipperke_"+randInt;
                break;

            case "Siberian Husky":
                Log.i("Breed", breeds[randInt]);
                filePath = "sh_"+randInt;
                break;

            case "Tibetan Mastiff":
                Log.i("Breed", breeds[randInt]);
                filePath = "tm_"+randInt;
                break;

                default:
                    Log.i("Error", "Not Found");
        }


        final ImageView imageView = findViewById(R.id.questionImage);
        imageView.setImageDrawable(getDrawable(AppUtility.getResourceID(filePath,this.getApplicationContext())));


    }

    @Override
    public void onBackPressed() {
        finish();
    }



    public void submitAnswer(View view) {
        // Unhides Next Button after question has been submitted
        if(spinner.getSelectedItem().toString().equalsIgnoreCase(correctName )){

        }

        nextBtn  = findViewById(R.id.nextBtn);
        nextBtn.setVisibility(View.VISIBLE);

        appSetup();
    }

AppUtility类

import android.content.Context;

class AppUtility {

    static int getResourceID(final String resource, final Context appContext) {

        final int RES_ID = appContext.getResources().getIdentifier(resource, "drawable",
                appContext.getApplicationInfo().packageName);
        if (RES_ID == 0) {
//            throw new IllegalArgumentException("No application resource found at : " + resource);
            return RES_ID+1;
        }else {
            return RES_ID;
        }
    }


    static int getRandomNumber(int min, int max){
        int returnNum = (int)Math.round(Math.random()*max);

        while(returnNum<min){
            returnNum = (int)Math.round(Math.random()*max);
        }

        return returnNum;
    }
}

更新:

因此，在我的 getResourceID() 方法中取消注释 throw new IllegalExceptionError 行后。我现在得到这一行错误，它响应传递给该方法的资源什么都没有？？

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.doggyroulette, PID: 25960
    java.lang.IllegalArgumentException: No application resource found at : 
        at com.example.doggyroulette.AppUtility.getResourceID(AppUtility.java:12)
        at com.example.doggyroulette.IdentifyBreedActivity.appSetup(IdentifyBreedActivity.java:152)
        at com.example.doggyroulette.IdentifyBreedActivity.access$000(IdentifyBreedActivity.java:18)
        at com.example.doggyroulette.IdentifyBreedActivity$1.onClick(IdentifyBreedActivity.java:186)
        at android.view.View.performClick(View.java:7339)
        at android.widget.TextView.performClick(TextView.java:14226)
        at android.view.View.performClickInternal(View.java:7305)
        at android.view.View.access$3200(View.java:846)
        at android.view.View$PerformClick.run(View.java:27787)
        at android.os.Handler.handleCallback(Handler.java:873)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:214)
        at android.app.ActivityThread.main(ActivityThread.java:7094)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:975)

这不可能是图像的问题，因为我记录了通过 Log Cat 传递到图像中的数字，这就是所经历的情况。最后一个数字是崩溃的地方。

2020-02-24 06:03:55.338 26898-26898/com.example.doggyroulette I/Rand_ID: 3
2020-02-24 06:03:59.716 26898-26898/com.example.doggyroulette I/Rand_ID: 7
2020-02-24 06:04:01.855 26898-26898/com.example.doggyroulette I/Rand_ID: 8
2020-02-24 06:04:03.455 26898-26898/com.example.doggyroulette I/Rand_ID: 5
2020-02-24 06:04:05.347 26898-26898/com.example.doggyroulette I/Rand_ID: 6

Answer 1

Caused by: android.content.res.Resources$NotFoundException: Resource ID #0x1

您正在尝试查找 ID 为 1 的资源。鉴于资源的编号方式，不会有具有该 ID 的资源。

static int getResourceID(final String resource, final Context appContext) {

    final int RES_ID = appContext.getResources().getIdentifier(resource, "drawable",
            appContext.getApplicationInfo().packageName);
    if (RES_ID == 0) {
//            throw new IllegalArgumentException("No application resource found at : " + resource);
        return RES_ID+1;
    }else {
        return RES_ID;
    }
}

如果资源查找失败，您将返回1。所以，我的猜测是，您的第 10 个项目的资源查找失败。也许您缺少适当的可绘制对象。

我建议您取消注释 IllegalArgumentException 行，看看是否会在您的场景中抛出该异常。这将确认失败的 1 查找来自 return RES_ID+1;。