Question

可能重复：
Calling camera from an activity, capturing an image and uploading to a server

我是非常新的android，我试图捕获图像后我将该图像放入图像视图，它在模拟器上工作，但在设备崩溃它显示消息强制关闭，即使它无法打开相机活动。以下是我的代码。请帮我解决这个问题。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，而不是物理设备。

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);
        }
    };
}

main.xml中

          <?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>

使用Android相机捕获图像

1 个答案: