Android拍照和取相册并裁切

1.先弹出框有两个选项:

public void camera() {
  final CharSequence[] items = { "相册", "拍照" };
  AlertDialog dlg = new AlertDialog.Builder(SettingFragment.this.mAct)
    .setTitle("选择图片")
    .setItems(items, new DialogInterface.OnClickListener() {
     public void onClick(DialogInterface dialog, int item) {
      // 在items数组里面定义了两种方式，拍照的下标为1所以就调用拍照方法
      if (item == 1) {
       Intent intent = new Intent(
         MediaStore.ACTION_IMAGE_CAPTURE);

	//去拍照
       startActivityForResult(intent, REQUEST_CAMERA);

      } else {
       Intent getImage = new Intent(
         Intent.ACTION_GET_CONTENT);
       getImage.addCategory(Intent.CATEGORY_OPENABLE);
       getImage.setType("image/*");
       startActivityForResult(getImage, 0);
      }
     }
    }).create();
  dlg.show();
 }

2.拍照和相册事件完成后会回调OnActivityResult里面，requestCode是启动事件标识，resultCode是回调状态码 -1 0 1：

	@Override
	public void onActivityResult(int requestCode, int resultCode, Intent data) {
		// TODO Auto-generated method stub
		super.onActivityResult(requestCode, resultCode, data);
		if (requestCode == 2) {
			Bitmap tempPhoto = null;
			if (data != null) {
				tempPhoto = (Bitmap) data.getExtras().get("data");
				if (tempPhoto == null) {
					return;
				}
				//img_head是ImageView设置图片
				img_head.setImageBitmap(tempPhoto);

				//读取图片压缩流数据

				file = CropUtil.makeTempFile(
						SettingFragment.this.getActivity(),
						tempPhoto,
						FileNameGenerator.generator(System.currentTimeMillis()
								+ "hupu")
								+ ".png");
				file_path = file.getAbsolutePath();
			}
		}
		if (requestCode == REQUEST_CAMERA||requestCode == 0) {
			Intent intent = new Intent("com.android.camera.action.CROP");
	        intent.setDataAndType(data.getData(), "image/*");
	        intent.putExtra("crop", "true");
	        intent.putExtra("aspectX", 1); //设置按长和宽的比例裁剪
	        intent.putExtra("aspectY", 1);
	        intent.putExtra("outputX", 180); //设置输出的大小
	        intent.putExtra("outputY", 180);
	        intent.putExtra("scale", true); //设置是否允许拉伸
	        // 如果要在给定的uri中获取图片，则必须设置为false，如果设置为true，那么便不会在给定的uri中获取到裁剪的图片
	        intent.putExtra("return-data", true);
	        intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());//设置输出格式
	        intent.putExtra("noFaceDetection", true); // 无需人脸识别  默认不需要设置
	        startActivityForResult(intent, 2);
		}
	}

 

3.读取图片缓存本地，并压缩文件流数据返回文件类型：

public static File makeTempFile(Context mcontext, Bitmap photo,
			String nameKey) {
		// 判断是否有存储卡
		String status = Environment.getExternalStorageState();
		// 等比例压缩图片，将较长的一边压缩到600px一下，最大容量不超过200K
		ByteArrayOutputStream bos = new ByteArrayOutputStream();
		photo.compress(CompressFormat.PNG, 100, bos);
		byte[] tempData = bos.toByteArray();
		File file2 = new File(FileNameGenerator.getExternalDir(mcontext)
				+ "/runing");
		if (file2.exists() && file2.isDirectory()) {
			file2.delete();
		}
		file2.mkdir();
		// 将压缩后的图片缓存到存储卡根目录下（权限）
		File bFile = new File(FileNameGenerator.getExternalDir(mcontext)
				+ "/runing", nameKey);
		FileOutputStream fos = null;
		try {
			fos = new FileOutputStream(bFile);
			fos.write(tempData);
			fos.flush();
			if (bFile.exists() && bFile.length() > 0)
				return bFile;
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			CropUtil.closeIO(null, fos);
		}
		return null;
	}

4.获取系统文件存储路径如下：
/**
	 * 获取程序外部的缓存目录
	 * 
	 * @param context
	 * @return
	 */
	public static File getExternalCacheDir(Context context) {
		return new File(Environment.getExternalStorageDirectory().getPath()
				);
	}

	public static File getExternalDir(Context context) {
		return new File(getCahePath(context));
	}

	public static final String getCahePath(Context ctx) {
		if (cache_path == null) {
			cache_path = Environment.MEDIA_MOUNTED.equals(Environment
					.getExternalStorageState()) ? getExternalCacheDir(ctx)
					.getPath() : ctx.getCacheDir().getPath();
		}
		return cache_path;
	}