android相机调用及存储详解

 package com.firefly.six;

 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;

 import android.app.Activity;
 import android.content.Intent;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.graphics.drawable.Drawable;
 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.ViewGroup;
 import android.view.Window;
 import android.widget.BaseAdapter;
 import android.widget.GridView;
 import android.widget.ImageButton;
 import android.widget.ImageView;
 import android.widget.TextView;
 import android.widget.Toast;

 public class ImageActivity extends Activity {
     File outputImage;
     private ImageView iv;
     public static final int TAKE_PHOTO = 1;
     public static final int CROP_PHOTO = 2;
     private Uri imageUri;
     private String path = Environment.getExternalStorageDirectory()
             .getAbsolutePath();
     private String imagePath;
     private GridView gv_photos;
     String photoPath = path + "/Six/image/";
     File[] images;
     ImageButton image;
     List<Drawable> lists;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         requestWindowFeature(Window.FEATURE_NO_TITLE);
         setContentView(R.layout.activity_image);
         init();
     }

     private void init() {
         iv = (ImageView) findViewById(R.id.iv_picture);
         File f = new File(photoPath);
         images = f.listFiles();
         try {
             lists = new ArrayList<Drawable>();
             for (int i = 0; i < images.length; i++) {
                 FileInputStream fil = new FileInputStream(photoPath
                         + images[i].getName());
                 Drawable d = Drawable.createFromStream(fil, null);
                 lists.add(d);
             }

         } catch (FileNotFoundException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }

         gv_photos = (GridView) findViewById(R.id.gv_photos);
         gv_photos.setAdapter(new BaseAdapter() {

             @Override
             public View getView(int position, View convertView, ViewGroup parent) {
                 // TODO Auto-generated method stub
                 convertView = View.inflate(ImageActivity.this,
                         R.layout.item_photo, null);
                 ImageView iv = (ImageView) convertView
                         .findViewById(R.id.iv_photo_item);
                 TextView tv = (TextView) convertView
                         .findViewById(R.id.tv_photo);
                 tv.setText(images[position].getName());
                 iv.setImageDrawable(lists.get(position));
                 return convertView;
             }

             @Override
             public long getItemId(int position) {
                 // TODO Auto-generated method stub
                 return 0;
             }

             @Override
             public Object getItem(int position) {
                 // TODO Auto-generated method stub
                 return null;
             }

             @Override
             public int getCount() {
                 // TODO Auto-generated method stub
                 return lists.size();
             }
         });
     }

     public void SelectImage(View view) {
         // 创建File路径，用于存储拍照后的图片

         // File filePath = Environment.getExternalStorageDirectory();

         // 新建此文件夹
         File fileFolder = new File(photoPath);
         if (!fileFolder.exists() && !fileFolder.isDirectory()) {
             fileFolder.mkdirs();
         }

         // 文件名不能总是同一个名字，所以在这里，可以选择用时间来做图片名称

         SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMddHHmmss");
         Date curDate = new Date(System.currentTimeMillis());// 获取当前时间
         String name = "six" + formatter.format(curDate);
         // 新建此文件
         outputImage = new File(fileFolder, name + ".jpg");
         // 得到它的名字，在显示中用
         imagePath = photoPath + name + ".jpg";
         // 找到地址及调用
         imageUri = Uri.fromFile(outputImage);
         Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
         intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
         // 启动相机程序
         startActivityForResult(intent, TAKE_PHOTO);

     }

     // 注意，这里是要重写这个方法，必须要重写！！
     @Override
     public void onActivityResult(int requestCode, int resultCode, Intent data) {
         switch (requestCode) {
         case TAKE_PHOTO:
             if (resultCode == RESULT_OK) {
                 Intent intent = new Intent("com.android.camera.action.CROP");
                 intent.setDataAndType(imageUri, "image/*");
                 intent.putExtra("scale", true);
                 intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
                 // 启动裁剪程序
                 startActivityForResult(intent, CROP_PHOTO);
             }
             break;
         case CROP_PHOTO:
             if (resultCode == RESULT_OK) {
                 try {
                     Bitmap bitmap = BitmapFactory
                             .decodeStream(getContentResolver().openInputStream(
                                     imageUri));
                     // 将裁剪后的照片显示出来
                     iv.setImageBitmap(bitmap);
                 } catch (FileNotFoundException e) {
                     e.printStackTrace();
                 }
             }
             break;
         default:
             break;
         }
     }

     public void PhotoToImage(View view) {
         Toast.makeText(ImageActivity.this, "未做待续哈~", 0).show();
     }

 }