<!--在SDCard中创建与删除文件权限 –><uses-permissioandroid:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/> <!--往SDCard写入数据权限 --> <uses-permissionandroid:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)// 获取SD卡状态，并且值为Environment.MEDIA_MOUNTED时进行照片的拍摄。

private static final File PHOTO_DIR = new File(Environment.getExternalStorageDirectory() + "/DCIM/Camera"); // 图片的存储目录PHOTO_DIR.mkdir();//创建目录

File mCurrentPhotoFile;//图片文件 mCurrentPhotoFile = new File(PHOTO_DIR, getPhotoFileName()); // 用当前时间给取得的图片命名    /**     * 创建一个新的图片名     */ private String getPhotoFileName() {       Date date = new Date(System.currentTimeMillis());        SimpleDateFormat format = new SimpleDateFormat("‘IMG‘_yyyyMMdd_HHmmss");        return format.format(date) + ".jpg";    }

private static final int CAMERA_WITH_DATA = http://www.mamicode.com/0; // 拍照Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");//跳转到照相Uri fromFile = Uri.fromFile(mCurrentPhotoFile); // String string = fromFile.toString(); intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(mCurrentPhotoFile)); startActivityForResult(intent, CAMERA_WITH_DATA);

import android.app.Activity;import android.content.Intent;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.Matrix;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.widget.Button;import android.widget.ImageView;import com.example.test.R;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Date;import java.util.List;/** * Created by Administrator on 2014/9/9. */public class GetPic extends Activity {    private static final File PHOTO_DIR = new File(            Environment.getExternalStorageDirectory() + "/DCIM/Camera"); // 图片的存储目录    File mCurrentPhotoFile;//图片文件    private static final int CAMERA_WITH_DATA = http://www.mamicode.com/0; // 拍照    private Integer mStepImg = 0;    private static final int SCALE = 4;// 照片缩小比例    private List<Bitmap> mBitmaps = new ArrayList<Bitmap>();    private ImageView mImg_pic1, mImg_pic2;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.get_pic);        mImg_pic1 = (ImageView) findViewById(R.id.view1);        mImg_pic2 = (ImageView) findViewById(R.id.view2);        Button button = (Button) findViewById(R.id.button);        button.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                getPicFromCapture();            }        });    }    private void getPicFromCapture() {        if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {//判断SDCard的状态            PHOTO_DIR.mkdir();//创建目录            mCurrentPhotoFile = new File(PHOTO_DIR, getPhotoFileName()); // 用当前时间给取得的图片命名            Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");//跳转到照相            Uri fromFile = Uri.fromFile(mCurrentPhotoFile);            // String string = fromFile.toString();            intent.putExtra(MediaStore.EXTRA_OUTPUT,                    Uri.fromFile(mCurrentPhotoFile));            startActivityForResult(intent, CAMERA_WITH_DATA);        } else {            Log.e("---------", "没有sd卡");        }    }    /**     * 创建一个新的图片名     */    private String getPhotoFileName() {        Date date = new Date(System.currentTimeMillis());        SimpleDateFormat format = new SimpleDateFormat("‘IMG‘_yyyyMMdd_HHmmss");        return format.format(date) + ".jpg";    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        if (resultCode != RESULT_OK)            return;        switch (requestCode) {            case CAMERA_WITH_DATA: {// 照相机程序返回的,再次调用图片剪辑程序去修剪图片               mStepImg++;                // Bundle extras = data.getExtras();                // final Bitmap bitmap = (Bitmap) extras.get("data");                // 获取图片、缩小、显示、保存               Bitmap bitmap = BitmapFactory.decodeFile(mCurrentPhotoFile.toString());//根据文件全路径获取图片               final ImgModel imgModel = new ImgModel();                imgModel.path = mCurrentPhotoFile.toString();                // imgModel.bitmap = bitmap;             Bitmap newBitmap = zoomBitmap(bitmap, bitmap.getWidth() / SCALE, bitmap.getHeight() / SCALE);//缩放图片               bitmap.recycle();// 由于Bitmap内存占用较大，这里需要回收内存，否则会报out of memory异常               mBitmaps.add(bitmap);//？？如果用到缩放前图片               mBitmaps.add(newBitmap);             mImg_pic1.setScaleType(ImageView.ScaleType.CENTER_CROP);             mImg_pic2.setScaleType(ImageView.ScaleType.CENTER_CROP);//按比例扩大图片的size居中显示，使得图片长(宽)等于或大于View的长(宽)                // 生成图片显示在界面上                if (mStepImg == 1) {                    mImg_pic1.setTag(mStepImg);                    mImg_pic1.setImageBitmap(newBitmap);//                    mImg_pic2.setVisibility(View.VISIBLE);                } else if (mStepImg == 2) {                    mImg_pic2.setTag(mStepImg);                    mImg_pic2.setImageBitmap(newBitmap);                }                // 将处理过的图片显示在界面上，并保存到本地                savePhotoToSDCard(newBitmap, Environment.getExternalStorageDirectory().getAbsolutePath(),                        String.valueOf(System.currentTimeMillis()));                //Environment.getExternalStorageDirectory().getAbsolutePath()是获取外部存储路径的绝对路径，即SD卡的文件路径                //此处的事件是保存事件                break;            }        }    }    public Bitmap zoomBitmap(Bitmap bitmap, int width, int height) {//缩小BitMap        int w = bitmap.getWidth();        int h = bitmap.getHeight();        Matrix matrix = new Matrix();        float scaleWidth = ((float) width / w);        float scaleHeight = ((float) height / h);        matrix.postScale(scaleWidth, scaleHeight);        Bitmap newbmp = Bitmap.createBitmap(bitmap, 0, 0, w, h, matrix, true);        return newbmp;    }    /**     * 保存图片     */    public void savePhotoToSDCard(Bitmap photoBitmap, String path, String photoName) {        if (checkSDCardAvailable()) {            File dir = new File(path);            if (!dir.exists()) {//dir.exists()判断路径是否存在，不存在则创建                dir.mkdirs();            }            File photoFile = new File(path, photoName + ".png");            FileOutputStream fileOutputStream = null;            try {                fileOutputStream = new FileOutputStream(photoFile);                if (photoBitmap != null) {                    if (photoBitmap.compress(Bitmap.CompressFormat.PNG, 100,                            fileOutputStream)) {                        fileOutputStream.flush();//清除                        // fileOutputStream.close();                    }                }            } catch (FileNotFoundException e) {                photoFile.delete();                e.printStackTrace();            } catch (IOException e) {                photoFile.delete();                e.printStackTrace();            } finally {                try {                    fileOutputStream.close();//关闭                } catch (IOException e) {                    e.printStackTrace();                }            }        }    }    /**     * 判断SD卡是否可用     *     * @return     */    public boolean checkSDCardAvailable() {        return android.os.Environment.getExternalStorageState().equals(                android.os.Environment.MEDIA_MOUNTED);    }}

/** * Created by Administrator on 2014/9/9. */public class ImgModel {    public String path;}