android-camera - 使用安卓相机捕捉图像

Question

这个问题在这里已经有了答案:




8年前关闭。

Possible Duplicate:
Calling camera from an activity, capturing an image and uploading to a server

我对android非常陌生，我试图在将该图像放入 ImageView 之后捕获图像，它在模拟器上工作但在设备中它崩溃了它显示消息强制关闭即使它无法打开相机事件。以下是我的代码。
请帮助我如何解决这个问题。谢谢。

package com.gss.android;

package com.gss.android;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;

import android.app.Activity;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;

public class Pictures extends Activity{

    Button btnsave,btnnewpic;
    protected ImageView image;
    protected String _path;
     File sdImageMainDirectory;
    private static final int IMAGE_CAPTURE = 0;
    protected boolean _taken = true;
    private Uri imageUri;
    protected static final String PHOTO_TAKEN = "photo_taken";
    private static final int CAMERA_PIC_REQUEST = 1;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.pictures);
        btnsave=(Button)findViewById(R.id.btnsave);
        btnnewpic=(Button)findViewById(R.id.btnnewpic);




        btnnewpic.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub

                startCameraActivity2();
            }
        });

    }

     protected void onActivityResult(int requestCode, int resultCode, Intent data) {

            if ( requestCode == CAMERA_PIC_REQUEST){
                if (resultCode == RESULT_OK){
                    switch (resultCode) {
                    case 0:
                           finish();
                           break;

                    case -1:

                           try {

                              StoreImage(this, Uri.parse(data.toURI()),
                                           sdImageMainDirectory);
                              Log.e("file path", "stiring file") ;
                               } catch (Exception e) {
                                                 e.printStackTrace();
                                }

                                    finish();


                                 }


            }

            } else if ( requestCode == IMAGE_CAPTURE) {
                if (resultCode == RESULT_OK){
                    Log.d("ANDRO_CAMERA","Picture taken!!!");
                    ImageView image = (ImageView) findViewById(R.id.image); 
                    image.setImageURI(imageUri);
                }
            } 
     }

        protected void startCameraActivity2()
        {
            Log.d("ANDRO_CAMERA", "Starting camera on the phone...");
            String fileName = "testphoto.jpg";
            ContentValues values = new ContentValues();
            values.put(MediaStore.Images.Media.TITLE, fileName);
            values.put(MediaStore.Images.Media.DESCRIPTION,
                    "Image capture by camera");
            values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg");
            imageUri = getContentResolver().insert(
                    MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
            Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
            intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);
            startActivityForResult(intent, IMAGE_CAPTURE);

        }





           @Override
           protected void onRestoreInstanceState(Bundle savedInstanceState) {
           if (savedInstanceState.getBoolean(Pictures.PHOTO_TAKEN)) {
           _taken = true;
           }
       }

          @Override
          protected void onSaveInstanceState(Bundle outState) {
          outState.putBoolean(Pictures.PHOTO_TAKEN, _taken);
       }

           public static void StoreImage(Context mContext, Uri imageLoc, File imageDir) {
           Bitmap bm = null;
               try {

                   bm = MediaStore.Images.Media.getBitmap(mContext.getContentResolver(), imageLoc);
                   FileOutputStream out = new FileOutputStream(imageDir);
                   bm.compress(Bitmap.CompressFormat.JPEG, 100, out);
                    Log.e("file dir",imageDir.toString());

                     bm.recycle();


                    } catch (FileNotFoundException e) {
                    e.printStackTrace();
                    } catch (IOException e) {
                    e.printStackTrace();
                   } catch (Exception e) {
                  e.printStackTrace();
             }

         }

}

Answer 1

我认为这是与模拟器有关的问题，而不是与物理设备有关的问题。

我使用了这段代码，我得到了一个位图:

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        captureButton = (Button)findViewById(R.id.capture);
        captureButton.setOnClickListener(listener);

        imageView = (ImageView)findViewById(R.id.image);

        destination = new   File(Environment.getExternalStorageDirectory(),"image.jpg");
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if(requestCode == REQUEST_IMAGE && resultCode == Activity.RESULT_OK) {
            //Bitmap userImage = (Bitmap)data.getExtras().get("data");
            try {
                FileInputStream in = new FileInputStream(destination);
                BitmapFactory.Options options = new BitmapFactory.Options();
                options.inSampleSize = 10; //Downsample 10x
                Bitmap userImage = BitmapFactory.decodeStream(in, null, options);
                imageView.setImageBitmap(userImage);
            } catch (Exception e) {
                e.printStackTrace();
            }

        }
    }

    private View.OnClickListener listener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            //Add extra to save full-image somewhere
            intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(destination));
            Toast.makeText(JMABarcodeScannerActivity.this, Uri.fromFile(destination).toString(), Toast.LENGTH_SHORT).show();
            startActivityForResult(intent, REQUEST_IMAGE);
        }
    };
}

主文件

          <?xml version="1.0" encoding="utf-8"?>


          <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
          android:orientation="vertical"
          android:layout_width="fill_parent"
          android:layout_height="fill_parent">
      <Button
    android:id="@+id/capture"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="Take a Picture"
      />
      <ImageView
    android:id="@+id/image"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:scaleType="centerInside"
       />
          </LinearLayout>