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

public class SelectPhotoActivity extends Activity implements OnClickListener {
	/** 使用照相機拍照獲取圖片 */
	public static final int SELECT_PIC_BY_TACK_PHOTO = 1;
	/** 使用相簿中的圖片 */
	public static final int SELECT_PIC_BY_PICK_PHOTO = 2;
	/** 開啟相機 */
	private Button btn_take_photo;
	/** 開啟圖冊 */
	private Button btn_pick_photo;
	/** 取消 */
	private Button btn_cancel;
	/** 獲取到的圖片路徑 */
	private String picPath;
	private Intent lastIntent;
	private Uri photoUri;
	/** 從Intent獲取圖片路徑的KEY */
	public static final String KEY_PHOTO_PATH = "photo_path";

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_select_photo);
		btn_take_photo = (Button) findViewById(R.id.btn_take_photo);
		btn_pick_photo = (Button) findViewById(R.id.btn_pick_photo);
		btn_cancel = (Button) findViewById(R.id.btn_cancel);

		lastIntent = getIntent();

		btn_take_photo.setOnClickListener(this);
		btn_pick_photo.setOnClickListener(this);
		btn_cancel.setOnClickListener(this);
	}

	@Override
	public void onClick(View v) {
		switch (v.getId()) {
			case R.id.btn_take_photo : // 開啟相機
				takePhoto();
				break;
			case R.id.btn_pick_photo : // 開啟圖冊
				pickPhoto();
				break;
			case R.id.btn_cancel : // 取消操作
				this.finish();
				break;
			default :
				break;
		}
	}
	private void takePhoto() {
		//  執行拍照前，應該先判斷SD卡是否存在
		String SDState = Environment.getExternalStorageState();
		if (SDState.equals(Environment.MEDIA_MOUNTED)) {
			Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);// "android.media.action.IMAGE_CAPTURE"
			/***
			 * 需要說明一下，以下操作使用照相機拍照，拍照後的圖片會存放在相簿中的 這裡使用的這種方式有一個好處就是獲取的圖片是拍照後的原圖
			 * 如果不實用ContentValues存放照片路徑的話，拍照後獲取的圖片為縮圖不清晰
			 */
			ContentValues values = new ContentValues();
			photoUri = this.getContentResolver().insert(
					MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
			intent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, photoUri);
			startActivityForResult(intent, SELECT_PIC_BY_TACK_PHOTO);
		} else {
			Toast.makeText(getApplicationContext(), "記憶體卡不存在",
					Toast.LENGTH_SHORT).show();
		}
	}

	/***
	 *  從相簿中取圖片
	 */
	private void pickPhoto() {
		Intent intent = new Intent();
		intent.setType("image/*");
		intent.setAction(Intent.ACTION_GET_CONTENT);
		startActivityForResult(intent, SELECT_PIC_BY_PICK_PHOTO);
	}

	@Override
	public boolean onTouchEvent(MotionEvent event) {
		finish();
		return super.onTouchEvent(event);
	}

	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		if (resultCode == Activity.RESULT_OK) {
			doPhoto(requestCode, data);
		}
		super.onActivityResult(requestCode, resultCode, data);
	}

	/**
	 * 選擇圖片後，獲取圖片的路徑
	 */
	private void doPhoto(int requestCode, Intent data) {
		if (requestCode == SELECT_PIC_BY_PICK_PHOTO) {// 從相簿取圖片，有些手機有異常情況，請注意
			if (data == null) {
				Toast.makeText(getApplicationContext(), "選擇圖片檔案出錯",
						Toast.LENGTH_SHORT).show();
				return;
			}
			photoUri = data.getData();
			if (photoUri == null) {
				Toast.makeText(getApplicationContext(), "選擇圖片檔案出錯",
						Toast.LENGTH_SHORT).show();
				return;
			}
		}
		String[] pojo = {MediaStore.Images.Media.DATA};
		@SuppressWarnings("deprecation")
		Cursor cursor = managedQuery(photoUri, pojo, null, null, null);
		if (cursor != null) {
			int columnIndex = cursor.getColumnIndexOrThrow(pojo[0]);
			cursor.moveToFirst();
			picPath = cursor.getString(columnIndex);
			cursor.close();
		}
		if (picPath != null
				&& (picPath.endsWith(".png") || picPath.endsWith(".PNG")
						|| picPath.endsWith(".jpg") || picPath.endsWith(".JPG"))) {
			lastIntent.putExtra(KEY_PHOTO_PATH, picPath);
			setResult(Activity.RESULT_OK, lastIntent);
			finish();
		} else {
			Toast.makeText(getApplicationContext(), "選擇圖片檔案不正確",
					Toast.LENGTH_SHORT).show();
		}
	}

}
 

其中會使用到intent的跳轉，我們可以在跳轉期間新增動畫以及背景透明:

<activity
            android:name="com.seven.activity.SelectPhotoActivity"
            android:screenOrientation="portrait"
            android:theme="@style/DialogStyleBottom" >
        </activity>

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