獲取系統的相機功能拍照這個不難，但是需要注意的是，拍照返回後的照片如果沒有指定儲存的路徑，那麼系統將自動儲存到sd卡中，得到的是拍完照的縮圖，會失幀，顯示有些模糊，所以在呼叫系統相機拍完照後我們要指定一個路徑，將它存起來，需要的時候再去拿，呼叫相簿這裡當時需要的是相簿的多選，但是系統相簿只能單選，所以自定義了一個相簿，是直接startActivity的，我們來看看獲取相簿和系統相機的Intent是怎麼寫的。

AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("新增顏色");
String[] items = {"
 
從相簿選取", "拍照"};
builder.setNegativeButton("取消", null);
builder.setItems(items, new DialogInterface.OnClickListener() {

   @Override
public void onClick(DialogInterface dialog, int which) {
      switch (which) {
         case CHOOSE_PICTURE:// 選擇本地照片Intent intent = new Intent(SampleSendActivity.this,SampleCameraActivity.class
 
);
startActivityForResult(intent, ACTION_IMAGE_PICTURE);
            break;
         case TAKE_PICTURE:// 拍照Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
/**
             * 每次拍照新建一個照片檔案
*/
String name = new DateFormat().format("yyyyMMdd_hhmmss", Calendar.getInstance(Locale.CHINA)) + ".jpg"
 
;
File file = new File("/sdcard/myImage/");
file.mkdirs();// 建立資料夾
mFilePath = "/sdcard/myImage/"+name;
// 載入路徑
Uri uri = Uri.fromFile(new File(mFilePath));
// 指定儲存路徑，這樣就可以儲存原圖了
intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);
// 拍照返回圖片
startActivityForResult(intent, ACTION_IMAGE_CAMEREA);            break;
}
   }
});
builder.create().show();

現在我們來看看呼叫系統相簿後去獲取指定的file，直接通過路徑顯示在imageview中

if (requestCode == ACTION_IMAGE_CAMEREA&& resultCode == Activity.RESULT_OK) {
   String storageState = Environment.getExternalStorageState();
   if (!storageState.equals(Environment.MEDIA_MOUNTED)) {
      return;
}// /sdcard
mFilePath = "/storage/emulated/0" + mFilePath.substring(7);
BitmapUtil.loadUriImage(SampleSendActivity.this, mFilePath, tagHolder.iv_pinkaddpig);
   //這裡的bitmaputil是我自己寫的，就是通過路徑載入到imageview中，可以忽略}

     再來看看自定義多選相簿的實現

public class SampleCameraActivity extends Activity implements OnImageDirSelected {
    private ProgressDialog mProgressDialog;
/**
     * 儲存資料夾中的圖片數量
*/
private int mPicsSize;
/**
     * 圖片數量最多的資料夾
*/
private File mImgDir;
/**
     * 所有的圖片
*/
private List<String> mImgs;
    private GridView mGirdView;
    private MyAdapter mAdapter;
/**
     * 臨時的輔助類，用於防止同一個資料夾的多次掃描
*/
private HashSet<String> mDirPaths = new HashSet<String>();
/**
     * 掃描拿到所有的圖片資料夾
*/
private List<ImageFloder> mImageFloders = new ArrayList<ImageFloder>();
    private RelativeLayout mBottomLy;
    private TextView mChooseDir;
    private TextView mImageCount;
    int totalCount = 0;
    private int mScreenHeight;
    private ListImageDirPopupWindow mListImageDirPopupWindow;
    private Handler mHandler = new Handler() {
        public void handleMessage(android.os.Message msg) {
            mProgressDialog.dismiss();
// 為View繫結資料
data2View();
// 初始化展示資料夾的popupWindw
initListDirPopupWindw();
}
    };
    private TextView tv_samplecamera_confirm;
    private TextView tv_return;
/**
     * 為View繫結資料
*/
private void data2View() {
        if (mImgDir == null) {
            Toast.makeText(getApplicationContext(), "擦，一張圖片沒掃描到",
Toast.LENGTH_SHORT).show();
            return;
}
        mImgs = Arrays.asList(mImgDir.list());
/**
         * 可以看到資料夾的路徑和圖片的路徑分開儲存，極大的減少了記憶體的消耗；
*/
mAdapter = new MyAdapter(getApplicationContext(), mImgs,
R.layout.view_cameragrid_item, mImgDir.getAbsolutePath());
mAdapter.setIamgeNull();
mGirdView.setAdapter(mAdapter);
mImageCount.setText(totalCount + "張");
};
/**
     * 初始化展示資料夾的popupWindw
     */
private void initListDirPopupWindw() {
        mListImageDirPopupWindow = new ListImageDirPopupWindow(
                (int) LayoutParams.MATCH_PARENT, (int) (mScreenHeight * 0.7),
mImageFloders, LayoutInflater.from(getApplicationContext())
                .inflate(R.layout.view_cameralist_dir, null));
mListImageDirPopupWindow.setOnDismissListener(new OnDismissListener() {

            @Override
public void onDismiss() {
                // 設定背景顏色變暗
WindowManager.LayoutParams lp = getWindow().getAttributes();
lp.alpha = 1.0f;
getWindow().setAttributes(lp);
}
        });
// 設定選擇資料夾的回撥
mListImageDirPopupWindow.setOnImageDirSelected(this);
}

    @Override
protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sample_camera);
DisplayMetrics outMetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(outMetrics);
mScreenHeight = outMetrics.heightPixels;
getActionBar().hide();
initView();
getImages();
initEvent();
}

    /**
     * 利用ContentProvider掃描手機中的圖片，此方法在執行在子執行緒中 完成圖片的掃描，最終獲得jpg最多的那個資料夾
*/
private void getImages() {
        if (!Environment.getExternalStorageState().equals(
                Environment.MEDIA_MOUNTED)) {
            Toast.makeText(this, "暫無外部儲存", Toast.LENGTH_SHORT).show();
            return;
}
        // 顯示進度條
mProgressDialog = ProgressDialog.show(this, null, "正在載入...");
        new Thread(new Runnable() {
            @Override
public void run() {
                String firstImage = null;
Uri mImageUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
ContentResolver mContentResolver = SampleCameraActivity.this
.getContentResolver();
// 只查詢jpeg和png的圖片
Cursor mCursor = mContentResolver.query(mImageUri, null,
MediaStore.Images.Media.MIME_TYPE + "=? or "
+ MediaStore.Images.Media.MIME_TYPE + "=?",
                        new String[]{"image/jpeg", "image/png"},
MediaStore.Images.Media.DATE_MODIFIED);
Log.e("TAG", mCursor.getCount() + "");
                while (mCursor.moveToNext()) {
                    // 獲取圖片的路徑
String path = mCursor.getString(mCursor
                            .getColumnIndex(MediaStore.Images.Media.DATA));
Log.e("TAG", path);
// 拿到第一張圖片的路徑
if (firstImage == null)
                        firstImage = path;
// 獲取該圖片的父路徑名
File parentFile = new File(path).getParentFile();
                    if (parentFile == null)
                        continue;
String dirPath = parentFile.getAbsolutePath();
ImageFloder imageFloder = null;
// 利用一個HashSet防止多次掃描同一個資料夾（不加這個判斷，圖片多起來還是相當恐怖的~~）
if (mDirPaths.contains(dirPath)) {
                        continue;
} else {
                        mDirPaths.add(dirPath);
// 初始化imageFloder
imageFloder = new ImageFloder();
imageFloder.setDir(dirPath);
imageFloder.setFirstImagePath(path);
}
                    int picSize = 0;
                    try{
                        picSize = parentFile.list(new FilenameFilter() {
                            @Override
public boolean accept(File dir, String filename) {
                                if (filename.endsWith(".jpg")
                                        || filename.endsWith(".png")
                                        || filename.endsWith(".jpeg"))
                                    return true;
                                return false;
}
                        }).length;
}catch (Exception e){
                        e.printStackTrace();
}
                    totalCount += picSize;
imageFloder.setCount(picSize);
mImageFloders.add(imageFloder);
                    if (picSize > mPicsSize) {
                        mPicsSize = picSize;
mImgDir = parentFile;
}
                }
                mCursor.close();
// 掃描完成，輔助的HashSet也就可以釋放記憶體了
mDirPaths = null;
// 通知Handler掃描圖片完成
mHandler.sendEmptyMessage(0x110);
}
        }).start();
}

    /**
     * 初始化View
     */
private void initView() {
        mGirdView = (GridView) findViewById(R.id.id_gridView);
tv_samplecamera_confirm = (TextView) findViewById(R.id.tv_samplecamera_confirm);
mChooseDir = (TextView) findViewById(R.id.id_choose_dir);
tv_return = (TextView) findViewById(R.id.tv_return_samplecamera);
mImageCount = (TextView) findViewById(R.id.id_total_count);
mBottomLy = (RelativeLayout) findViewById(R.id.id_bottom_ly);
}

    private void initEvent() {
        tv_samplecamera_confirm.setOnClickListener(new OnClickListener() {

            @Override
public void onClick(View v) {
                ArrayList<String> imageList = mAdapter.getImageList();
Intent intent = new Intent();
Bundle bundle = new Bundle();
bundle.putStringArrayList("images", imageList);
intent.putExtras(bundle);
setResult(11, intent);
finish();
}
        });
tv_return.setOnClickListener(new OnClickListener() {
            @Override
public void onClick(View v) {
                finish();
}
        });
/**
         * 為底部的佈局設定點選事件，彈出popupWindow
         */
mBottomLy.setOnClickListener(new OnClickListener() {
            @Override
public void onClick(View v) {
                mListImageDirPopupWindow
.setAnimationStyle(R.style.anim_popup_dir);
mListImageDirPopupWindow.showAsDropDown(mBottomLy, 0, 0);
// 設定背景顏色變暗
WindowManager.LayoutParams lp = getWindow().getAttributes();
lp.alpha = .3f;
getWindow().setAttributes(lp);
}
        });
}

    public void selected(ImageFloder floder) {
        mImgDir = new File(floder.getDir());
mImgs = Arrays.asList(mImgDir.list(new FilenameFilter() {
            @Override
public boolean accept(File dir, String filename) {
                if (filename.endsWith(".jpg") || filename.endsWith(".png")
                        || filename.endsWith(".jpeg"))
                    return true;
                return false;
}
        }));
/**
         * 可以看到資料夾的路徑和圖片的路徑分開儲存，極大的減少了記憶體的消耗；
*/
mAdapter = new MyAdapter(getApplicationContext(), mImgs,
R.layout.view_cameragrid_item, mImgDir.getAbsolutePath());
mGirdView.setAdapter(mAdapter);mImageCount.setText(floder.getCount() + "張");
mChooseDir.setText(floder.getName());
mListImageDirPopupWindow.dismiss();
}
}

   來看看呼叫後的效果

相簿呼叫後返回的是包含相片的本地路徑字串

ArrayList<String> imageArrayList = bundle.getStringArrayList("images");

原始碼下載：

http://download.csdn.net/download/jacky_can/9878331