获取android的拍照和自定义多选相册
获取系统的相机功能拍照这个不难，但是需要注意的是，拍照返回后的照片如果没有指定存储的路径，那么系统将自动保存到sd卡中，得到的是拍完照的缩略图，会失帧，显示有些模糊，所以在调用系统相机拍完照后我们要指定一个路径，将它存起来，需要的时候再去拿，调用相册这里当时需要的是相册的多选，但是系统相册只能单选，所以自定义了一个相册，是直接startActivity的，我们来看看获取相册和系统相机的Intent是怎么写的。
AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle("添加颜色"); String[] items = {"从相册选取", "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:// 选择本地照片 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); /** * 每次拍照新建一个照片文件 */ String name = new DateFormat().format("yyyyMMdd_hhmmss", Calendar.getInstance(Locale.CHINA)) + ".jpg"; File file = new File("/sdcard/myImage/"); file.mkdirs();// 创建文件夹 mFilePath = "/sdcard/myImage/"+name; // 加载路径 Uri uri = Uri.fromFile(new File(mFilePath)); // 指定存储路径，这样就可以保存原图了 intent.putExtra(MediaStore.EXTRA_OUTPUT, uri); intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1); // 拍照返回图片 startActivityForResult(intent, ACTION_IMAGE_CAMEREA); break; } } }); builder.create().show();
现在我们来看看调用系统相册后去获取指定的file，直接通过路径显示在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); //这里的bitmaputil是我自己写的，就是通过路径加载到imageview中，可以忽略 }
再来看看自定义多选相册的实现
public class SampleCameraActivity extends Activity implements OnImageDirSelected { private ProgressDialog mProgressDialog; /** * 存储文件夹中的图片数量 */ private int mPicsSize; /** * 图片数量最多的文件夹 */ private File mImgDir; /** * 所有的图片 */ private ListmImgs; private GridView mGirdView; private MyAdapter mAdapter; /** * 临时的辅助类，用于防止同一个文件夹的多次扫描 */ private HashSet mDirPaths = new HashSet (); /** * 扫描拿到所有的图片文件夹 */ private List mImageFloders = new ArrayList (); 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(); // 为View绑定数据 data2View(); // 初始化展示文件夹的popupWindw initListDirPopupWindw(); } }; private TextView tv_samplecamera_confirm; private TextView tv_return; /** * 为View绑定数据 */ private void data2View() { if (mImgDir == null) { Toast.makeText(getApplicationContext(), "擦，一张图片没扫描到", Toast.LENGTH_SHORT).show(); return; } mImgs = Arrays.asList(mImgDir.list()); /** * 可以看到文件夹的路径和图片的路径分开保存，极大的减少了内存的消耗； */ mAdapter = new MyAdapter(getApplicationContext(), mImgs, R.layout.view_cameragrid_item, mImgDir.getAbsolutePath()); mAdapter.setIamgeNull(); mGirdView.setAdapter(mAdapter); mImageCount.setText(totalCount + "张"); }; /** * 初始化展示文件夹的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() { // 设置背景颜色变暗 WindowManager.LayoutParams lp = getWindow().getAttributes(); lp.alpha = 1.0f; getWindow().setAttributes(lp); } }); // 设置选择文件夹的回调 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扫描手机中的图片，此方法在运行在子线程中 完成图片的扫描，最终获得jpg最多的那个文件夹 */ private void getImages() { if (!Environment.getExternalStorageState().equals( Environment.MEDIA_MOUNTED)) { Toast.makeText(this, "暂无外部存储", Toast.LENGTH_SHORT).show(); return; } // 显示进度条 mProgressDialog = ProgressDialog.show(this, null, "正在加载..."); new Thread(new Runnable() { @Override public void run() { String firstImage = null; Uri mImageUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI; ContentResolver mContentResolver = SampleCameraActivity.this .getContentResolver(); // 只查询jpeg和png的图片 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()) { // 获取图片的路径 String path = mCursor.getString(mCursor .getColumnIndex(MediaStore.Images.Media.DATA)); Log.e("TAG", path); // 拿到第一张图片的路径 if (firstImage == null) firstImage = path; // 获取该图片的父路径名 File parentFile = new File(path).getParentFile(); if (parentFile == null) continue; String dirPath = parentFile.getAbsolutePath(); ImageFloder imageFloder = null; // 利用一个HashSet防止多次扫描同一个文件夹（不加这个判断，图片多起来还是相当恐怖的~~） 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(); // 扫描完成，辅助的HashSet也就可以释放内存了 mDirPaths = null; // 通知Handler扫描图片完成 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 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(); } }); /** * 为底部的布局设置点击事件，弹出popupWindow */ mBottomLy.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { mListImageDirPopupWindow .setAnimationStyle(R.style.anim_popup_dir); mListImageDirPopupWindow.showAsDropDown(mBottomLy, 0, 0); // 设置背景颜色变暗 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; } })); /** * 可以看到文件夹的路径和图片的路径分开保存，极大的减少了内存的消耗； */ mAdapter = new MyAdapter(getApplicationContext(), mImgs, R.layout.view_cameragrid_item, mImgDir.getAbsolutePath()); mGirdView.setAdapter(mAdapter); mImageCount.setText(floder.getCount() + "张"); mChooseDir.setText(floder.getName()); mListImageDirPopupWindow.dismiss(); } }
来看看调用后的效果
相册调用后返回的是包含相片的本地路径字符串
ArrayListimageArrayList = bundle.getStringArrayList("images");
源码下载：
http://download.csdn.net/download/jacky_can/9878331