通过拍照或选择本地图片并剪裁图片设置成头像，并保存裁剪后图片与本地方便注册头像上传

import java.io.File;

import android.app.AlertDialog;
import android.content.Context;
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.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class CropActivity extends BaseActivity {
    private Context context;
    private Button btn_crop;
    private String[] items = new String[] { "选择本地图片", "拍照" };

    private static final String SAVE_PIC_PATH=Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED) ? Environment.getExtern　　　　　　alStorageDirectory().getAbsolutePath():"/mnt/sdcard";//保存到SD卡
    
    
    /*头像名称*/ 
    private static final String IMAGE_FILE_NAME = "faceImage.jpg"; 
    
    /* 请求码*/ 
    private static final int IMAGE_REQUEST_CODE = 0;  
    private static final int CAMERA_REQUEST_CODE = 1;  
    private static final int RESULT_REQUEST_CODE = 2; 

    private String filtPath = ""; 
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_crop);
        context=this;
        initViews();
    }

    
    @Override
    protected void onResume() {
        // TODO Auto-generated method stub
        super.onResume();
        initValues();
    }

    @Override
    protected void updateViews(Object o) {
        // TODO Auto-generated method stub

    }

    @Override
    protected void initViews() {
        // TODO Auto-generated method stub
        
        btn_crop=(Button)findViewById(R.id.btn_crop);
        btn_crop.setOnClickListener(new View.OnClickListener() {
            
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                showDialog();
            }
        });
        
    }

    @Override
    protected void initValues() {
        // TODO Auto-generated method stub
    }

    @Override
    protected void initHandler() {
        // TODO Auto-generated method stub

    }
    
    private void showDialog() {  
        
        new AlertDialog.Builder(this)  
                .setTitle("设置头像")  
                .setItems(items, new DialogInterface.OnClickListener() {  
 
                    @Override 
                    public void onClick(DialogInterface dialog, int which) {  
                        switch (which) {  
                        case 0:  
                            Intent intentFromGallery = new Intent();  
                            intentFromGallery.setType("image/*"); // 设置文件类型  
                            intentFromGallery.setAction(Intent.ACTION_GET_CONTENT);
                            startActivityForResult(intentFromGallery,IMAGE_REQUEST_CODE); 
                            break;  
                        case 1:  
                            Intent intentFromCapture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                            // 判断存储卡是否可以用，可用进行存储  
                            if (hasSdcard()) {  
                                intentFromCapture.putExtra(MediaStore.EXTRA_OUTPUT,
                                        Uri.fromFile(new File(Environment.getExternalStorageDirectory(),IMAGE_FILE_NAME)));
                            }  
                            startActivityForResult(intentFromCapture,CAMERA_REQUEST_CODE);
                            break;  
                        }  
                    }  
                })  
                .setNegativeButton("取消", new DialogInterface.OnClickListener() {  
 
                    @Override 
                    public void onClick(DialogInterface dialog, int which) {  
                        dialog.dismiss();  
                    }  
                }).show();  
 
    }  
    
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // 结果码不等于取消时候
        if (resultCode != RESULT_CANCELED) {
            switch (requestCode) {
            case IMAGE_REQUEST_CODE:
                startPhotoZoom(data.getData());
                break;
            case CAMERA_REQUEST_CODE:
                if (hasSdcard()) {
                    File tempFile = new File(Environment.getExternalStorageDirectory(),IMAGE_FILE_NAME);
                    startPhotoZoom(Uri.fromFile(tempFile));
                } else {
                    showToast("未找到存储卡，无法存储照片！");
                }

                break;
            case RESULT_REQUEST_CODE:
                if (data != null) {
                    setImageToView(data);
                }
                break;
            }
        }
        super.onActivityResult(requestCode, resultCode, data);
    }
     
        /**  
         * 裁剪图片方法实现  
         *   
         * @param uri  
         */  
        public void startPhotoZoom(Uri uri) {  
            if(uri==null){
                Log.i("tag", "The uri is not exist.");
            }
            Intent intent = new Intent("com.android.camera.action.CROP");  
            intent.setDataAndType(uri, "image/*");  
            // 设置裁剪  
            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", 320);  
            intent.putExtra("outputY", 320);  
            intent.putExtra("return-data", true);  
            startActivityForResult(intent, 2);  
        }  
     
        /**  
         * 保存裁剪之后的图片数据  
         *   
         * @param picdata  
         */  
        private void setImageToView(Intent data) {  
            Bundle extras = data.getExtras();  
            if (extras != null) {  
                Bitmap photo = extras.getParcelable("data");  
                Drawable drawable = new BitmapDrawable(photo);  

184             Calendar calendar = Calendar.getInstance();
185             String imgname = String.valueOf(calendar.getTimeInMillis());
186             filtPath = saveBitmapToSDCard(photo, imgname);
                btn_crop.setBackgroundDrawable(drawable);
            }  
        }  
    
    

    public String saveBitmapToSDCard(Bitmap bitmap,String imagename)   
194     {   
195         FileOutputStream fos = null;   
196         try {
197             String filePath = SAVE_PIC_PATH+ "/beauty/images/img-"+imagename + ".png";
198             File file = new File(filePath);
199             if(!file.exists())
200             {
201                 file.getParentFile().mkdirs();
202                 file.createNewFile();
203             }
204             fos = new FileOutputStream(file); 
205             if (fos != null) {
206                 bitmap.compress(Bitmap.CompressFormat.PNG, 90, fos);   
207                 fos.close();
208                 
209                 return filePath;
210             }   
211         } catch (Exception e) {   
212             e.printStackTrace();
213             return null;
214         }
215         return null;
216     } 
217 





}