拍照，裁剪照片

程序中的主要代碼

package com.example.photo;

import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;

import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity implements OnClickListener {
	private final static String FILE_SAVEPATH = Environment.getExternalStorageDirectory().getAbsolutePath()
			+ "/Laiguo/Portrait/";
	private Button btn_take;
	private Button btn_pick;

	private Uri origUri;
	private Uri cropUri;
	private File protraitFile;
	private Bitmap protraitBitmap;
	private String protraitPath;
	private final static int CROP = 200;
	public final static String SDCARD_MNT = "/mnt/sdcard";
	public final static String SDCARD = "/sdcard";
	/** 請求相冊 */
	public static final int REQUEST_CODE_GETIMAGE_BYSDCARD = 0;
	/** 請求相機 */
	public static final int REQUEST_CODE_GETIMAGE_BYCAMERA = 1;
	/** 請求裁剪 */
	public static final int REQUEST_CODE_GETIMAGE_BYCROP = 2;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		btn_take = (Button) findViewById(R.id.button1);
		btn_pick = (Button) findViewById(R.id.button2);

		btn_take.setOnClickListener(this);
		btn_pick.setOnClickListener(this);

	}

	@Override
	public void onClick(View arg0) {
		switch (arg0.getId()) {
		case R.id.button1:
			startActionCamera();

			break;
		case R.id.button2:
			startImagePick();
			break;

		}
	}

	// 拍照
	private void startActionCamera() {
		Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
		intent.putExtra(MediaStore.EXTRA_OUTPUT, this.getCameraTempFile());
		startActivityForResult(intent, REQUEST_CODE_GETIMAGE_BYCAMERA);
	}

	@Override
	protected void onActivityResult(final int requestCode, final int resultCode, final Intent data) {
		if (resultCode != RESULT_OK)
			return;

		switch (requestCode) {
		case REQUEST_CODE_GETIMAGE_BYCAMERA:
			startActionCrop(origUri);// 拍照後裁剪
			break;
		case REQUEST_CODE_GETIMAGE_BYCROP:
			startActionCrop(data.getData());// 選圖後裁剪
			break;
		case REQUEST_CODE_GETIMAGE_BYSDCARD:
			// uploadNewPhoto();// 上傳新照片
			// protraitPath 最後的圖片路徑
			break;
		}
	}

	/**
	 * 選擇圖片裁剪
	 * 
	 * @param output
	 */
	private void startImagePick() {
		Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
		intent.addCategory(Intent.CATEGORY_OPENABLE);
		intent.setType("image/*");
		startActivityForResult(Intent.createChooser(intent, "選擇圖片"), REQUEST_CODE_GETIMAGE_BYCROP);
	}

	// 拍照保存的絕對路徑
	private Uri getCameraTempFile() {
		String storageState = Environment.getExternalStorageState();
		if (storageState.equals(Environment.MEDIA_MOUNTED)) {
			File savedir = new File(FILE_SAVEPATH);
			if (!savedir.exists()) {
				savedir.mkdirs();
			}
		} else {
			System.out.println("無法保存上傳的頭像，請檢查SD卡是否掛載");
			return null;
		}
		String timeStamp = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date());
		// 照片命名
		String cropFileName = "osc_camera_" + timeStamp + ".jpg";
		// 裁剪頭像的絕對路徑
		protraitPath = FILE_SAVEPATH + cropFileName;
		protraitFile = new File(protraitPath);
		cropUri = Uri.fromFile(protraitFile);
		this.origUri = this.cropUri;
		return this.cropUri;
	}

	// 裁剪頭像的絕對路徑
	private Uri getUploadTempFile(Uri uri) {
		String storageState = Environment.getExternalStorageState();
		if (storageState.equals(Environment.MEDIA_MOUNTED)) {
			File savedir = new File(FILE_SAVEPATH);
			if (!savedir.exists()) {
				savedir.mkdirs();
			}
		} else {
			System.out.println("無法保存上傳的頭像，請檢查SD卡是否掛載");
			return null;
		}
		String timeStamp = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date());
		String thePath = getAbsolutePathFromNoStandardUri(uri);

		// 如果是標準Uri
		if (isEmpty(thePath)) {
			thePath = getAbsoluteImagePath(this, uri);
		}
		String ext = getFileFormat(thePath);
		ext = isEmpty(ext) ? "jpg" : ext;
		// 照片命名
		String cropFileName = "osc_crop_" + timeStamp + "." + ext;
		// 裁剪頭像的絕對路徑
		protraitPath = FILE_SAVEPATH + cropFileName;
		protraitFile = new File(protraitPath);

		cropUri = Uri.fromFile(protraitFile);
		return this.cropUri;
	}

	private void startActionCrop(Uri data) {
		Intent intent = new Intent("com.android.camera.action.CROP");
		intent.setDataAndType(data, "image/*");
		intent.putExtra("output", getUploadTempFile(data));
		intent.putExtra("crop", "true");
		intent.putExtra("aspectX", 1);// 裁剪框比例
		intent.putExtra("aspectY", 1);
		intent.putExtra("outputX", CROP);// 輸出圖片大小
		intent.putExtra("outputY", CROP);
		intent.putExtra("scale", true);// 去黑邊
		intent.putExtra("scaleUpIfNeeded", true);// 去黑邊
		startActivityForResult(intent, REQUEST_CODE_GETIMAGE_BYSDCARD);
	}

	/**
	 * 判斷當前Url是否標準的content://樣式，如果不是，則返回絕對路徑
	 * 
	 * @param uri
	 * @return
	 */
	public static String getAbsolutePathFromNoStandardUri(Uri mUri) {
		String filePath = null;

		String mUriString = mUri.toString();
		mUriString = Uri.decode(mUriString);

		String pre1 = "file://" + SDCARD + File.separator;
		String pre2 = "file://" + SDCARD_MNT + File.separator;

		if (mUriString.startsWith(pre1)) {
			filePath = Environment.getExternalStorageDirectory().getPath() + File.separator
					+ mUriString.substring(pre1.length());
		} else if (mUriString.startsWith(pre2)) {
			filePath = Environment.getExternalStorageDirectory().getPath() + File.separator
					+ mUriString.substring(pre2.length());
		}
		return filePath;
	}

	/**
	 * 判斷給定字符串是否空白串。 空白串是指由空格、製表符、回車符、換行符組成的字符串 若輸入字符串爲null或空字符串，返回true
	 * 
	 * @param input
	 * @return boolean
	 */
	public static boolean isEmpty(String input) {
		if (input == null || "".equals(input))
			return true;

		for (int i = 0; i < input.length(); i++) {
			char c = input.charAt(i);
			if (c != ' ' && c != '\t' && c != '\r' && c != '\n') {
				return false;
			}
		}
		return true;
	}

	/**
	 * 通過uri獲取文件的絕對路徑
	 * 
	 * @param uri
	 * @return
	 */
	@SuppressWarnings("deprecation")
	public static String getAbsoluteImagePath(Activity context, Uri uri) {
		String imagePath = "";
		String[] proj = { MediaStore.Images.Media.DATA };
		Cursor cursor = context.managedQuery(uri, proj, // Which columns to
														// return
				null, // WHERE clause; which rows to return (all rows)
				null, // WHERE clause selection arguments (none)
				null); // Order-by clause (ascending by name)

		if (cursor != null) {
			int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
			if (cursor.getCount() > 0 && cursor.moveToFirst()) {
				imagePath = cursor.getString(column_index);
			}
		}

		return imagePath;
	}

	/**
	 * 獲取文件擴展名
	 * 
	 * @param fileName
	 * @return
	 */
	public static String getFileFormat(String fileName) {
		if (isEmpty(fileName))
			return "";

		int point = fileName.lastIndexOf('.');
		return fileName.substring(point + 1);
	}
}

需要的權限

<uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
    <uses-permission android:name="android.permission.RESTART_PACKAGES" />
    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <uses-permission android:name="android.permission.VIBRATE" />
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.FLASHLIGHT" />

代碼下載地址：

http://download.csdn.net/detail/hkg1pek/8111425