转载：Android调用相册、拍照实现缩放、切割图片

package com.xiaoma.piccut.demo;

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.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
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.ImageButton;
import android.widget.ImageView;
/**
 * 调用系统相册或者拍照来实现图片的裁剪、缩放
 * @author Kiritor
 **/
public class PicCutDemoActivity extends Activity  {

    private Button btn = null;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        //初始化
        init();
    }
    
    /**
     * 初始化方法实现
     */
    private void init() {
        btn = (Button) findViewById(R.id.button1);
        btn.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                ShowPickDialog();
            }
        });
    }

    
    /**
     * 控件点击事件实现
     * 
     * 因为有朋友问不同控件的背景图裁剪怎么实现，
     * 我就在这个地方用了三个控件，只为了自己记录学习
     * 大家觉得没用的可以跳过啦
     */
    

    /**
     * 选择提示对话框
     */
    private void ShowPickDialog() {
        new AlertDialog.Builder(this)
                .setTitle("设置头像...")
                .setNegativeButton("相册", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.dismiss();
                        
                        Intent intent = new Intent(Intent.ACTION_PICK, null);
                        
                        /**
                         * 下面这句话，与其它方式写是一样的效果，如果：
                         * intent.setData(MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                         * intent.setType(""image/*");设置数据类型
                         * 如果朋友们要限制上传到服务器的图片类型时可以直接写如："image/jpeg 、 image/png等的类型"
                         */
                        intent.setDataAndType(
                                MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
                                "image/*");
                        startActivityForResult(intent, 1);

                    }
                })
                .setPositiveButton("拍照", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {
                        dialog.dismiss();
                        Intent intent = new Intent(
                                MediaStore.ACTION_IMAGE_CAPTURE);
                        //下面这句指定调用相机拍照后的照片存储的路径
                        intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri
                                .fromFile(new File(Environment
                                        .getExternalStorageDirectory(),
                                        "xiaoma.jpg")));
                        startActivityForResult(intent, 2);
                    }
                }).show();
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch (requestCode) {
        // 如果是直接从相册获取
        case 1:
            startPhotoZoom(data.getData());
            break;
        // 如果是调用相机拍照时
        case 2:
            File temp = new File(Environment.getExternalStorageDirectory()
                    + "/test.jpg");
            startPhotoZoom(Uri.fromFile(temp));
            break;
        // 取得裁剪后的图片
        case 3:
            if(data != null){
                setPicToView(data);
            }
            break;
        default:
            break;

        }
        super.onActivityResult(requestCode, resultCode, data);
    }
    
    /**
     * 裁剪图片方法实现
     * @param uri
     */
    public void startPhotoZoom(Uri uri) {
        Intent intent = new Intent("com.android.camera.action.CROP");
        intent.setDataAndType(uri, "image/*");
        //下面这个crop=true是设置在开启的Intent中设置显示的VIEW可裁剪
        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", 150);
        intent.putExtra("outputY", 150);
        intent.putExtra("return-data", true);
        startActivityForResult(intent, 3);
    }
    
    /**
     * 保存裁剪之后的图片数据
     * @param picdata
     */
    private void setPicToView(Intent picdata) {
        Bundle extras = picdata.getExtras();
        if (extras != null) {
            Bitmap photo = extras.getParcelable("data");
            Drawable drawable = new BitmapDrawable(photo);
            
        }
    }

}