package com.jph.cp;

import java.io.File;
import java.io.FileNotFoundException;
import android.support.v7.app.ActionBarActivity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.View;
import android.widget.ImageView;

/**
 * 从相册选择照片进行裁剪，从相机拍取照片进行裁剪
 * @author JPH
 * Date:2014.10.09
 */
public class MainActivity extends ActionBarActivity {
	private final static int SELECT_PIC=0x123; 
	private final static int TAKE_PIC=0x124; 
	private final static int CROP_PIC=0x125; 
	private Uri imageUri;
	private ImageView imgShow;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		//初始化imageUri
		imageUri=Uri.fromFile(new File(Environment.getExternalStorageDirectory(), "test.jpg"));
		imgShow=(ImageView)findViewById(R.id.imgShow);
	}
	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		// TODO Auto-generated method stub
		switch (requestCode) {
		case SELECT_PIC:
			if (resultCode==RESULT_OK) {
				try {
					Bitmap bitmap=BitmapFactory.decodeStream(getContentResolver().
							openInputStream(imageUri));//将imageUri对象的图片加载到内存
					imgShow.setImageBitmap(bitmap);
				} catch (FileNotFoundException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
			break;
		case TAKE_PIC:
			if (resultCode==RESULT_OK) {
				cropImageUri(imageUri, 600, 600, CROP_PIC);
			}
			break;
		case CROP_PIC:
			if (resultCode==RESULT_OK) {
				try {
					Bitmap bitmap=BitmapFactory.decodeStream(getContentResolver().
							openInputStream(imageUri));//将imageUri对象的图片加载到内存
					imgShow.setImageBitmap(bitmap);
				} catch (FileNotFoundException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
			break;
		default:
			break;
		}
		super.onActivityResult(requestCode, resultCode, data);
	}
	/**
	 * 裁剪指定uri对应的照片
	 * @param imageUri：uri对应的照片
	 * @param outputX：裁剪宽
	 * @param outputY：裁剪高
	 * @param requestCode：请求码
	 */
	private void cropImageUri(Uri imageUri, int outputX, int outputY, int requestCode){
	    Intent intent = new Intent("com.android.camera.action.CROP");
	    intent.setDataAndType(imageUri, "image/*");
	    intent.putExtra("crop", "true");
	    intent.putExtra("aspectX", 1);
	    intent.putExtra("aspectY", 1);
	    intent.putExtra("outputX", outputX);
	    intent.putExtra("outputY", outputY);
	    intent.putExtra("scale", true);
	    intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
	    intent.putExtra("return-data", false);
	    intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
	    intent.putExtra("noFaceDetection", true); // no face detection
	    startActivityForResult(intent, requestCode);
	}

	public void cropPic(View view) {
		switch (view.getId()) {
		case R.id.btnCropFromGallery://从相册选择照片进行裁剪
			cropFromGallery();
			break;
		case R.id.btnCropFromTake://从相机拍取照片进行裁剪
			cropFromTake();
			break;

		default:
			break;
		}
	}
	/**
	 * 从相机拍取照片进行裁剪
	 */
	private void cropFromTake() {
		// TODO Auto-generated method stub
		Intent intent=new Intent();
		intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);//设置Action为拍照
		intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);//将拍取的照片保存到指定URI
		startActivityForResult(intent, TAKE_PIC);
	}
	/**
	 * 从相册选择照片进行裁剪
	 */
	private void cropFromGallery() {
		// TODO Auto-generated method stub		
		Intent intent=new Intent();
		intent.setAction(Intent.ACTION_PICK);//Pick an item from the data
		intent.setType("image/*");//从所有图片中进行选择
		intent.putExtra("crop", "true");//设置为裁切
		intent.putExtra("aspectX", 1);//裁切的宽比例
		intent.putExtra("aspectY", 1);//裁切的高比例
		intent.putExtra("outputX", 600);//裁切的宽度
		intent.putExtra("outputY", 600);//裁切的高度
		intent.putExtra("scale", true);//支持缩放
		intent.putExtra("return-data", false);
		intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);//将裁切的结果输出到指定的Uri
		intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());//裁切成的图片的格式
		intent.putExtra("noFaceDetection", true); // no face detection
		startActivityForResult(intent, SELECT_PIC);    
	}
}