为什么我在Android Studio中收到此错误"原始类型的预期资源"？

Question

我试图通过使用按钮设置默认壁纸,但出于某种原因,当我在OnCreate方法中设置InputStream时,我得到此错误"raw type of raw".我正在引用drawable文件夹并使用drawable文件夹中的icon.png图像.我正在按照NewBoston系列中的教程进行操作,它似乎对Travis工作正常,但由于某种原因,我在Android Studio中无法工作.可能是什么错误？谢谢

Camera.java:

package com.example.user.cameraapplication;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.Switch;

import java.io.IOException;
import java.io.InputStream;

/**
 * Created by user on 16-08-2015.
 */
public class Camera extends Activity implements View.OnClickListener{

    ImageView iv;
    Button b1,b2;
    ImageButton img;
    Intent i;
    final static  int cameractivity = 0;
    Bitmap b;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.photo);
        inititalize();
        InputStream is = getResources().openRawResource(R.drawable.icon);
        b = BitmapFactory.decodeStream(is);
    }

    private void inititalize() {
        iv = (ImageView)findViewById(R.id.iView1);
        img = (ImageButton)findViewById(R.id.imgbtn);
        b1 = (Button)findViewById(R.id.btn1);
        b2 = (Button)findViewById(R.id.btn2);

        b1.setOnClickListener(this);
        b2.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch(v.getId()){
            case R.id.btn1:
                try {
                    getApplicationContext().setWallpaper(b);
                } catch (IOException e) {
                    e.printStackTrace();
                }
                break;
            case R.id.imgbtn:
                i = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                startActivityForResult(i,cameractivity);

                break;
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(resultCode==RESULT_OK)
        {
            Bundle extras = data.getExtras();
            b = (Bitmap)extras.get("data");
           iv.setImageBitmap(b);

        }
    }
}

图片:

Answer 1

发生错误是因为Android Studio需要raw类型的资源文件.

解决方案1:

在"res"文件夹中创建一个名为"raw"的新文件夹,并将您的图标放在那里.原始文件夹应包含应用的所有媒体文件.

然后更换

InputStream is = getResources().openRawResource(R.drawable.icon);

同

InputStream is = getResources().openRawResource(R.raw.icon);

解决方案2:

另一种解决方案就是这样做.这不需要您创建原始文件夹:

InputStream is = getResources().openRawResource(+ R.drawable.icon);

Answer 2

更换

InputStream is = getResources().openRawResource(R.drawable.icon);

同

InputStream is = getResources().openRawResource(+ R.drawable.icon);