Android从相机或相册获取图片裁剪

package com.only.android.app;

import java.io.File;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.SystemClock;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

import com.only.android.R;

public class CopyOfImageScaleActivity extends Activity implements View.OnClickListener {
	/** Called when the activity is first created. */
	private Button selectImageBtn;
	private ImageView imageView;
	
	private File sdcardTempFile;
	private AlertDialog dialog;
	private int crop = 180;

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

		selectImageBtn = (Button) findViewById(R.id.selectImageBtn);
		imageView = (ImageView) findViewById(R.id.imageView);

		selectImageBtn.setOnClickListener(this);
		sdcardTempFile = new File("/mnt/sdcard/", "tmp_pic_" + SystemClock.currentThreadTimeMillis() + ".jpg");

	}

	@Override
	public void onClick(View v) {
		if (v == selectImageBtn) {
			if (dialog == null) {
				dialog = new AlertDialog.Builder(this).setItems(new String[] { "相机", "相册" }, new DialogInterface.OnClickListener() {
					@Override
					public void onClick(DialogInterface dialog, int which) {
						if (which == 0) {
							Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
							intent.putExtra("output", Uri.fromFile(sdcardTempFile));
							intent.putExtra("crop", "true");
							intent.putExtra("aspectX", 1);// 裁剪框比例
							intent.putExtra("aspectY", 1);
							intent.putExtra("outputX", crop);// 输出图片大小
							intent.putExtra("outputY", crop);
							startActivityForResult(intent, 101);
						} else {
							Intent intent = new Intent("android.intent.action.PICK");
							intent.setDataAndType(MediaStore.Images.Media.INTERNAL_CONTENT_URI, "image/*");
							intent.putExtra("output", Uri.fromFile(sdcardTempFile));
							intent.putExtra("crop", "true");
							intent.putExtra("aspectX", 1);// 裁剪框比例
							intent.putExtra("aspectY", 1);
							intent.putExtra("outputX", crop);// 输出图片大小
							intent.putExtra("outputY", crop);
							startActivityForResult(intent, 100);
						}
					}
				}).create();
			}
			if (!dialog.isShowing()) {
				dialog.show();
			}
		}
	}

	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
		if (resultCode == RESULT_OK) {
			Bitmap bmp = BitmapFactory.decodeFile(sdcardTempFile.getAbsolutePath());
			imageView.setImageBitmap(bmp);
		}
	}
}