照相机 相册 上传照片

权限：

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.CAMERA"/>

    private static final int PHOTO_GRAPH = 2;// 拍照
    private static final int PHOTO_ZOOM = 3; // 缩放
    private static final int PHOTO_RESULT = 4;// 结果
    private static final String IMAGE_UNSPECIFIED = "image/*";


AlertDialog.Builder builder=new AlertDialog.Builder(InfoActivity.this);
            builder.setTitle("头像");
            builder.setNegativeButton("取消", new DialogInterface.OnClickListener(){
                @Override
                public void onClick(DialogInterface dialog, int which) {

                }
            });
            String[] items=new String[]{"相册上传","拍摄上传"};
            builder.setItems(items, new DialogInterface.OnClickListener(){
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    if(which == 0){
                        //从相册获取图片
                        Intent intent = new Intent(Intent.ACTION_PICK, null);
                        intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, IMAGE_UNSPECIFIED);
                        startActivityForResult(intent, PHOTO_ZOOM);
                    }
                    else if(which == 1){
                        //从拍照获取图片
                        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                        intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(Environment
                                .getExternalStorageDirectory(),"temp.jpg")));
                        startActivityForResult(intent, PHOTO_GRAPH);
                    }
                }
            });
            builder.create().show();


   @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        //获取图片路径
        if (resultCode == 0) return;

        // 拍照
        if (requestCode == PHOTO_GRAPH) {
            // 设置文件保存路径
            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_ZOOM) {
            startPhotoZoom(data.getData());
        }

        // 处理结果
        if (requestCode == PHOTO_RESULT) {
            Bundle extras = data.getExtras();
            if (extras != null) {
                Bitmap photo = extras.getParcelable("data");
                ByteArrayOutputStream stream = new ByteArrayOutputStream();
                photo.compress(Bitmap.CompressFormat.JPEG, 100, stream);// (0-100)压缩文件
                //此处可以把Bitmap保存到sd卡中，具体请看：http://www.cnblogs.com/linjiqin/archive/2011/12/28/2304940.html
                imageView_head.setImageBitmap(photo); //把图片显示在ImageView控件上
                myApp = (MyGlobal)getApplication();
                myApp.saveUserHead(user_id, photo);
                EventMessage eventMessage = new EventMessage();
                eventMessage.setWhich(3);
                EventBus.getDefault().post(eventMessage);
            }
        }
    }

    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", 100);
        intent.putExtra("outputY", 100);
        intent.putExtra("return-data", true);
        startActivityForResult(intent, PHOTO_RESULT);
    }