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();
    }

}