对Activity强制横屏，保证预览方向正确。使用OrientationEventListener监听设备方向，判断竖拍时，旋转照片后再保存，保证竖拍时预览图片和保存后的图片方向一致。

      运行效果：

代码：

TestCameraActivity.java

package com.example.testcamera;

import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.List;
import java.util.UUID;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.hardware.Camera.Size;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.OrientationEventListener;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class TestCameraActivity extends Activity implements OnClickListener,
		SurfaceHolder.Callback {
	private static final String TAG = "TestCameraActivity";
	public static final String KEY_FILENAME = "filename";
	private Button mTakePhoto;
	private SurfaceView mSurfaceView;
	private Camera mCamera;
	private String mFileName;
	private OrientationEventListener mOrEventListener; // 设备方向监听器
	private Boolean mCurrentOrientation; // 当前设备方向 横屏false,竖屏true

	/* 图像数据处理还未完成时的回调函数 */
	private Camera.ShutterCallback mShutter = new Camera.ShutterCallback() {
		@Override
		public void onShutter() {
			// 一般显示进度条
		}
	};

	/* 图像数据处理完成后的回调函数 */
	private Camera.PictureCallback mJpeg = new Camera.PictureCallback() {

		@Override
		public void onPictureTaken(byte[] data, Camera camera) {
			// 保存图片
			mFileName = UUID.randomUUID().toString() + ".jpg";
			Log.i(TAG, mFileName);
			FileOutputStream out = null;
			try {
				out = openFileOutput(mFileName, Context.MODE_PRIVATE);
				byte[] newData = http://www.mamicode.com/null;>
ShowPicture.java
package com.example.testcamera;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.util.Log;
import android.view.Display;
import android.widget.ImageView;

public class ShowPicture extends Activity {

	private static final String TAG = "ShowPicture";
	private ImageView mPicture;

	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_show_picture);

		mPicture = (ImageView) findViewById(R.id.picture);
		String fileName = getIntent().getStringExtra(
				TestCameraActivity.KEY_FILENAME);
		// 图片路径
		Log.i(TAG, fileName);
		String path = getFileStreamPath(fileName).getAbsolutePath();

		Display display = getWindowManager().getDefaultDisplay(); // 显示屏尺寸
		float destWidth = display.getWidth();
		float destHeight = display.getHeight();

		// 读取本地图片尺寸
		BitmapFactory.Options options = new BitmapFactory.Options();
		options.inJustDecodeBounds = true;
		BitmapFactory.decodeFile(path, options);// 设置为true，options依然对应此图片，但解码器不会为此图片分配内存

		float srcWidth = options.outWidth;
		float srcHeight = options.outHeight;

		int inSampleSize = 1;
		if (srcHeight > destHeight || srcWidth > destWidth) { // 当图片长宽大于屏幕长宽时
			if (srcWidth > srcHeight) {
				inSampleSize = Math.round(srcHeight / destHeight);
			} else {
				inSampleSize = Math.round(srcWidth / destWidth);
			}
		}
		options = new BitmapFactory.Options();
		options.inSampleSize = inSampleSize;

		Bitmap bitmap = BitmapFactory.decodeFile(path, options);
		BitmapDrawable bDrawable = new BitmapDrawable(getResources(), bitmap);
		mPicture.setImageDrawable(bDrawable);
	}

	@Override
	public void onDestroy() {
		if (!(mPicture.getDrawable() instanceof BitmapDrawable))
			return;
		// 释放bitmap占用的空间
		BitmapDrawable b = (BitmapDrawable) mPicture.getDrawable();
		b.getBitmap().recycle();
		mPicture.setImageDrawable(null);
	}

}


  源码下载


Android Camera+SurfaceView实现自定义拍照