Android拍照、相册选取、裁剪图片

来自：http://blog.csdn.net/ryantang03/article/details/8656278

package com.example.listactivity;



import java.io.ByteArrayOutputStream;
import java.io.File;

import com.example.model.ImageTools;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
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.provider.MediaStore.Images.Media;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;

public class Paizhao extends Activity {
    
    private ImageView paizhao;
    private static final int SCALE = 5;//照片缩小比例
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.paizhao);
        paizhao = (ImageView)this.findViewById(R.id.paizhao);
        paizhao.setOnClickListener(new TanDialog());
    }
    
    class TanDialog implements OnClickListener{

        @Override
        public void onClick(View v) {
            showPicturePicker(Paizhao.this);
        }

        
    }

    private void showPicturePicker(Context context) {
        
        AlertDialog.Builder dialog = new AlertDialog.Builder(context);
        dialog.setTitle("图片来源");
        dialog.setNegativeButton("取消", null);
        dialog.setItems(new String[]{"拍照","相册"},new DialogInterface.OnClickListener() {
            
            @Override
            public void onClick(DialogInterface dialog, int which) {
                int REQUEST_CODE;
                switch(which){
                
                //拍照
                case 0:
                    REQUEST_CODE =0;
                    //启动相机                    
                    Intent openCameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                    SharedPreferences share = getSharedPreferences("temp", Context.MODE_WORLD_WRITEABLE);
                    ImageTools.deletePhotoAtPathAndName(Environment.getExternalStorageDirectory().getAbsolutePath(), share.getString("tempName", ""));
                    
                    String filename = String.valueOf(System.currentTimeMillis())+".jpg";
                    Editor editor = share.edit();
                    editor.putString("tempName", filename);
                    editor.commit();
                    
                    Uri imguri = Uri.fromFile(new File(Environment.getExternalStorageDirectory(),filename));
                    //开启
                    openCameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, imguri);
                    startActivityForResult(openCameraIntent, REQUEST_CODE);
                    break;
                    
                    //相册
                case 1:
                    Intent openAlbumIntent = new Intent(Intent.ACTION_GET_CONTENT);
                    openAlbumIntent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");
                    startActivityForResult(openAlbumIntent, 0);
                    break;
                }
                
            }
        } );
        dialog.create().show();
        
    }
    
    @Override
    //照相以后返回的照片
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(resultCode == RESULT_OK){
            
            switch (requestCode) {
            //拍照
            case 0:
                Uri uri = null;
                if(data != null){
                    uri = data.getData();
                    Log.e("----?", "data");
                }else{
                    Log.e("----?", "file");
                    String fileName = getSharedPreferences("temp",Context.MODE_WORLD_WRITEABLE).getString("tempName", "");
                    uri = Uri.fromFile(new File(Environment.getExternalStorageDirectory(),fileName));
                }
                //剪裁
                cropImage(uri, 500, 500, 1);
                break;
            case 1:
                Bitmap photo = null;
                Uri photoUri = data.getData();
                if (photoUri != null) {
                    photo = BitmapFactory.decodeFile(photoUri.getPath());
                }
                if (photo == null) {
                    Bundle extra = data.getExtras();
                    if (extra != null) {
                        photo = (Bitmap)extra.get("data");  
                        ByteArrayOutputStream stream = new ByteArrayOutputStream();  
                        photo.compress(Bitmap.CompressFormat.JPEG, 100, stream);
                    }  
                }
                paizhao.setImageBitmap(photo);
                break;
            }
        }
    }
    
    //截取图片
    public void cropImage(Uri uri, int outputX, int outputY, int requestCode){
        Intent intent = new Intent("com.android.camera.action.CROP");  
        intent.setDataAndType(uri, "image/*");  
        intent.putExtra("crop", "true");  
        intent.putExtra("aspectX", 1);  
        intent.putExtra("aspectY", 1);  
        intent.putExtra("outputX", outputX);   
        intent.putExtra("outputY", outputY); 
        intent.putExtra("outputFormat", "JPEG");
        intent.putExtra("noFaceDetection", true);
        intent.putExtra("return-data", true);  
        startActivityForResult(intent, requestCode);
    }
    
}

ImageTools 类

package com.example.model;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Shader.TileMode;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;

/**
 * Tools for handler picture
 * 
 * @author Ryan.Tang
 * 
 */
public final class ImageTools {

    /**
     * Transfer drawable to bitmap
     * 
     * @param drawable
     * @return
     */
    public static Bitmap drawableToBitmap(Drawable drawable) {
        int w = drawable.getIntrinsicWidth();
        int h = drawable.getIntrinsicHeight();

        Bitmap.Config config = drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
                : Bitmap.Config.RGB_565;
        Bitmap bitmap = Bitmap.createBitmap(w, h, config);
        Canvas canvas = new Canvas(bitmap);
        drawable.setBounds(0, 0, w, h);
        drawable.draw(canvas);
        return bitmap;
    }

    /**
     * Bitmap to drawable
     * 
     * @param bitmap
     * @return
     */
    public static Drawable bitmapToDrawable(Bitmap bitmap) {
        return new BitmapDrawable(bitmap);
    }

    /**
     * Input stream to bitmap
     * 
     * @param inputStream
     * @return
     * @throws Exception
     */
    public static Bitmap inputStreamToBitmap(InputStream inputStream)
            throws Exception {
        return BitmapFactory.decodeStream(inputStream);
    }

    /**
     * Byte transfer to bitmap
     * 
     * @param byteArray
     * @return
     */
    public static Bitmap byteToBitmap(byte[] byteArray) {
        if (byteArray.length != 0) {
            return BitmapFactory
                    .decodeByteArray(byteArray, 0, byteArray.length);
        } else {
            return null;
        }
    }

    /**
     * Byte transfer to drawable
     * 
     * @param byteArray
     * @return
     */
    public static Drawable byteToDrawable(byte[] byteArray) {
        ByteArrayInputStream ins = null;
        if (byteArray != null) {
            ins = new ByteArrayInputStream(byteArray);
        }
        return Drawable.createFromStream(ins, null);
    }

    /**
     * Bitmap transfer to bytes
     * 
     * @param byteArray
     * @return
     */
    public static byte[] bitmapToBytes(Bitmap bm) {
        byte[] bytes = null;
        if (bm != null) {
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            bm.compress(Bitmap.CompressFormat.PNG, 100, baos);
            bytes = baos.toByteArray();
        }
        return bytes;
    }

    /**
     * Drawable transfer to bytes
     * 
     * @param drawable
     * @return
     */
    public static byte[] drawableToBytes(Drawable drawable) {
        BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
        Bitmap bitmap = bitmapDrawable.getBitmap();
        byte[] bytes = bitmapToBytes(bitmap);
        ;
        return bytes;
    }

    /**
     * Base64 to byte[]
//     */
//    public static byte[] base64ToBytes(String base64) throws IOException {
//        byte[] bytes = Base64.decode(base64);
//        return bytes;
//    }
//
//    /**
//     * Byte[] to base64
//     */
//    public static String bytesTobase64(byte[] bytes) {
//        String base64 = Base64.encode(bytes);
//        return base64;
//    }

    /**
     * Create reflection images
     * 
     * @param bitmap
     * @return
     */
    public static Bitmap createReflectionImageWithOrigin(Bitmap bitmap) {
        final int reflectionGap = 4;
        int w = bitmap.getWidth();
        int h = bitmap.getHeight();

        Matrix matrix = new Matrix();
        matrix.preScale(1, -1);

        Bitmap reflectionImage = Bitmap.createBitmap(bitmap, 0, h / 2, w,
                h / 2, matrix, false);

        Bitmap bitmapWithReflection = Bitmap.createBitmap(w, (h + h / 2),
                Config.ARGB_8888);

        Canvas canvas = new Canvas(bitmapWithReflection);
        canvas.drawBitmap(bitmap, 0, 0, null);
        Paint deafalutPaint = new Paint();
        canvas.drawRect(0, h, w, h + reflectionGap, deafalutPaint);

        canvas.drawBitmap(reflectionImage, 0, h + reflectionGap, null);

        Paint paint = new Paint();
        LinearGradient shader = new LinearGradient(0, bitmap.getHeight(), 0,
                bitmapWithReflection.getHeight() + reflectionGap, 0x70ffffff,
                0x00ffffff, TileMode.CLAMP);
        paint.setShader(shader);
        // Set the Transfer mode to be porter duff and destination in
        paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));
        // Draw a rectangle using the paint with our linear gradient
        canvas.drawRect(0, h, w, bitmapWithReflection.getHeight()
                + reflectionGap, paint);

        return bitmapWithReflection;
    }

    /**
     * Get rounded corner images
     * 
     * @param bitmap
     * @param roundPx
     *            5 10
     * @return
     */
    public static Bitmap getRoundedCornerBitmap(Bitmap bitmap, float roundPx) {
        int w = bitmap.getWidth();
        int h = bitmap.getHeight();
        Bitmap output = Bitmap.createBitmap(w, h, Config.ARGB_8888);
        Canvas canvas = new Canvas(output);
        final int color = 0xff424242;
        final Paint paint = new Paint();
        final Rect rect = new Rect(0, 0, w, h);
        final RectF rectF = new RectF(rect);
        paint.setAntiAlias(true);
        canvas.drawARGB(0, 0, 0, 0);
        paint.setColor(color);
        canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
        paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
        canvas.drawBitmap(bitmap, rect, rect, paint);

        return output;
    }

    /**
     * Resize the bitmap
     * 
     * @param bitmap
     * @param width
     * @param height
     * @return
     */
    public static Bitmap zoomBitmap(Bitmap bitmap, int width, int height) {
        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;
    }

    /**
     * Resize the drawable
     * @param drawable
     * @param w
     * @param h
     * @return
     */
    public static Drawable zoomDrawable(Drawable drawable, int w, int h) {
        int width = drawable.getIntrinsicWidth();
        int height = drawable.getIntrinsicHeight();
        Bitmap oldbmp = drawableToBitmap(drawable);
        Matrix matrix = new Matrix();
        float sx = ((float) w / width);
        float sy = ((float) h / height);
        matrix.postScale(sx, sy);
        Bitmap newbmp = Bitmap.createBitmap(oldbmp, 0, 0, width, height,
                matrix, true);
        return new BitmapDrawable(newbmp);
    }
    
    /**
     * Get images from SD card by path and the name of image
     * @param photoName
     * @return
     */
    public static Bitmap getPhotoFromSDCard(String path,String photoName){
        Bitmap photoBitmap = BitmapFactory.decodeFile(path + "/" +photoName +".png");
        if (photoBitmap == null) {
            return null;
        }else {
            return photoBitmap;
        }
    }
    
    /**
     * Check the SD card 
     * @return
     */
    public static boolean checkSDCardAvailable(){
        return android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);
    }
    
    /**
     * Get image from SD card by path and the name of image
     * @param fileName
     * @return
     */
    public static boolean findPhotoFromSDCard(String path,String photoName){
        boolean flag = false;
        
        if (checkSDCardAvailable()) {
            File dir = new File(path);
            if (dir.exists()) {
                File folders = new File(path);
                File photoFile[] = folders.listFiles();
                for (int i = 0; i < photoFile.length; i++) {
                    String fileName = photoFile[i].getName().split("\.")[0];
                    if (fileName.equals(photoName)) {
                        flag = true;
                    }
                }
            }else {
                flag = false;
            }
//            File file = new File(path + "/" + photoName  + ".jpg" );
//            if (file.exists()) {
//                flag = true;
//            }else {
//                flag = false;
//            }
            
        }else {
            flag = false;
        }
        return flag;
    }
    
    /**
     * Save image to the SD card 
     * @param photoBitmap
     * @param photoName
     * @param path
     */
    public static void savePhotoToSDCard(Bitmap photoBitmap,String path,String photoName){
        if (checkSDCardAvailable()) {
            File dir = new File(path);
            if (!dir.exists()){
                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();
//                        fileOutputStream.close();
                    }
                }
            } catch (FileNotFoundException e) {
                photoFile.delete();
                e.printStackTrace();
            } catch (IOException e) {
                photoFile.delete();
                e.printStackTrace();
            } finally{
                try {
                    fileOutputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        } 
    }
    
    /**
     * Delete the image from SD card
     * @param context
     * @param path
     * file:///sdcard/temp.jpg
     */
    public static void deleteAllPhoto(String path){
        if (checkSDCardAvailable()) {
            File folder = new File(path);
            File[] files = folder.listFiles();
            for (int i = 0; i < files.length; i++) {
                files[i].delete();
            }
        }
    }
    
    public static void deletePhotoAtPathAndName(String path,String fileName){
        if (checkSDCardAvailable()) {
            File folder = new File(path);
            File[] files = folder.listFiles();
            for (int i = 0; i < files.length; i++) {
                System.out.println(files[i].getName());
                if (files[i].getName().equals(fileName)) {
                    files[i].delete();
                }
            }
        }
    }

}

AndroidManifest

       <uses-feature android:name="android.hardware.camera" />
    <uses-feature android:name="android.hardware.camera.autofocus" />
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />