系统相册和拍照图片进行裁剪保存

直接上例子吧,折腾了一上午,就整理出这点东西,这年头,知识挺贵的:)

package com.example.album;

import java.io.ByteArrayOutputStream;
import java.io.File;

import android.app.Activity;
import android.content.Intent;
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;
import android.widget.ImageView;

public class SysAlbumActivity extends Activity {

	public static final int NONE = 0;
	public static final int PHOTO_CAPTURE = 1;
	public static final int PHOTO_ALBUM = 2;
	public static final int PHOTO_CUT = 3;

	public static final String IMAGE_UNSPECIFIED = "image/*";
	public ImageView imageView = null;
	public Button mAlbumBtn = null;
	public Button mCaptureBtn = null;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		imageView = (ImageView) findViewById(R.id.imageID);
		mAlbumBtn = (Button) findViewById(R.id.mAlbumBtn);
		mCaptureBtn = (Button) findViewById(R.id.mCaptureBtn);

		mAlbumBtn.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				Intent intent = new Intent(Intent.ACTION_PICK, null);
				intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, IMAGE_UNSPECIFIED);
				startActivityForResult(intent, PHOTO_ALBUM);
			}
		});

		mCaptureBtn.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
				intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(Environment.getExternalStorageDirectory(), "temp.jpg")));
				startActivityForResult(intent, PHOTO_CAPTURE);
			}
		});
	}

	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		if (resultCode == NONE)
			return;
		/** 拍照 */
		if (requestCode == PHOTO_CAPTURE) {
			/** 设置文件保存路径这里放在跟目录下 */
			File picture = new File(Environment.getExternalStorageDirectory() + "/temp.jpg");
			startPhotoZoom(Uri.fromFile(picture));
		}

		if (data == null)
			return;

		/** 读取相册缩放图片 */
		if (requestCode == PHOTO_ALBUM) {
			startPhotoZoom(data.getData());
		}
		if (requestCode == PHOTO_CUT) {
			Bundle extras = data.getExtras();
			if (extras != null) {
				Bitmap photo = extras.getParcelable("data");
				ByteArrayOutputStream stream = new ByteArrayOutputStream();
				photo.compress(Bitmap.CompressFormat.JPEG, 75, stream);
				imageView.setImageBitmap(photo);
			}
		}
		super.onActivityResult(requestCode, resultCode, data);
	}

	/** 进行图片的裁剪操作. */
	public void startPhotoZoom(Uri uri) {
		Intent intent = new Intent("com.android.camera.action.CROP");
		intent.setDataAndType(uri, IMAGE_UNSPECIFIED);
		intent.putExtra("crop", "true");
		// aspectX aspectY 是宽高的比例
		intent.putExtra("aspectX", 1);
		intent.putExtra("aspectY", 1);
		// outputX outputY 是裁剪图片宽高
		intent.putExtra("outputX", 64);
		intent.putExtra("outputY", 64);
		intent.putExtra("return-data", true);
		startActivityForResult(intent, PHOTO_CUT);
	}
}