android调用系统相机和相册进行拍照裁剪处理,解决不同安卓版本存在无法加载相册的问题,处理了是否有sd卡的存在的情况

//android调用系统相机和相册进行拍照裁剪处理,解决不同安卓版本存在无法加载相册的问题,处理了是否有sd卡的存在的情况

private static final int IMAGE_REQUEST_CODE = 0;
private static final int SELECT_PIC_KITKAT = 3;
private static final int CAMERA_REQUEST_CODE = 1;
private static final int RESULT_REQUEST_CODE = 2;
private static final String IMAGE_FILE_NAME_01 = “face.jpg”;
private Uri personPath = null;
private Uri companyPath = null;
private static final String IMAGE_FILE_NAME_02= “logo.jpg”;
private Dialog mydialog;
private boolean isPic ;
private boolean isOpen =false;
private boolean sdCardExist;
//先创建路径
private void makeDir() {
//检查手机上是否有外部存储卡
sdCardExist = Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);
if(!sdCardExist)
{
}else{//如果存在SD卡,判断文件夹目录是否存在
//一级目录和二级目录必须分开创建
File dirFirstFile=new File(Environment
.getExternalStorageDirectory()+”/ttx”);//新建一级主目录
if(!dirFirstFile.exists()){//判断文件夹目录是否存在
dirFirstFile.mkdir();//如果不存在则创建
}
}

//执行完上述方法之后,如果手机sd才能用,则在sd卡上创建一个文件夹,如果sd卡不能用,则在默认系统根目录处创建一个文件夹
接下来新建一个自定义dialog来实现调取的功能

class Mydialog extends Dialog {

    Context context;
    RadioButton rbcamera, rbpic;
    RadioGroup rgheaderchange;

    public Mydialog(Context context) {
        super(context);
        this.context = context;
    }

    public Mydialog(Context context, int theme) {
        super(context, theme);
        this.context = context;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.setContentView(R.layout.dia_headerchange);

        rbcamera = (RadioButton) findViewById(R.id.rb_camera);
        rbpic = (RadioButton) findViewById(R.id.rb_pic);
        rgheaderchange = (RadioGroup) findViewById(R.id.rg_headerchange);
        rgheaderchange
                .setOnCheckedChangeListener(new OnCheckedChangeListener() {

                    @Override
                    public void onCheckedChanged(RadioGroup group,
                            int checkedId) {
                        if (rbcamera.getId() == checkedId) {
                            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 (isPic) {
                                  intentFromCapture.putExtra(  
                                          MediaStore.EXTRA_OUTPUT,  
                                          Uri.fromFile(new File(Environment  
                                                  .getExternalStorageDirectory()+"/ttx",  
                                                  IMAGE_FILE_NAME_01))); 
                              }else{
                                  intentFromCapture.putExtra(  
                                          MediaStore.EXTRA_OUTPUT,  
                                          Uri.fromFile(new File(Environment  
                                                  .getExternalStorageDirectory()+"/ttx",  
                                                  IMAGE_FILE_NAME_02))); 
                              }


                            startActivityForResult(intentFromCapture,  
                                    CAMERA_REQUEST_CODE);
                            mydialog.dismiss();
                        } else {

                            // pickPhotoFromGallery();// 从相册中去获取
                            Intent intent=new Intent(Intent.ACTION_GET_CONTENT);  
                            intent.addCategory(Intent.CATEGORY_OPENABLE);  
                            intent.setType("image/*");  
                            if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT) {  
                                startActivityForResult(intent,SELECT_PIC_KITKAT);  
                            } else {  
                                startActivityForResult(intent,IMAGE_REQUEST_CODE);  
                            }
                            mydialog.cancel();
                        }
                    }
                });

    }
}

//实现返回方法进行处理
public void onActivityResult(int requestCode, int resultCode, Intent data) {
// 结果码不等于取消时候

    if (resultCode != Activity.RESULT_CANCELED) {  
        switch (requestCode) {  
        case IMAGE_REQUEST_CODE:  
            startPhotoZoom(data.getData());  
            break;  
        case SELECT_PIC_KITKAT:  
            startPhotoZoom(data.getData());  
            break;  
        case CAMERA_REQUEST_CODE:
            if (!sdCardExist) {
                //如果不存在SD卡,进行提示  
              Toast.makeText(getActivity(), "没有内存卡,无法拍照", Toast.LENGTH_SHORT).show();  
              getActivity().finish();
            }else{
                File tempFile =null;
                if (isPic) {

                     tempFile = new File(Environment.getExternalStorageDirectory()+ "/ttx/",IMAGE_FILE_NAME_01);  
                }else{
                    tempFile = new File(Environment.getExternalStorageDirectory()+ "/ttx/",IMAGE_FILE_NAME_02);  

                }
                startPhotoZoom(Uri.fromFile(tempFile));  
            }

            break;  
        case RESULT_REQUEST_CODE:  
            Bundle bundle = data.getExtras();
            Bitmap photo = bundle.getParcelable("data");
            photo = ThumbnailUtils.extractThumbnail(photo, 50, 50);  
            if (isPic) {
                mimg_card_add_pic.setImageBitmap(photo);
            }else{
                mimg_card_add_logo.setImageBitmap(photo);
            }
            saveBitmap(photo);
            break;  
        }  
    }  
    super.onActivityResult(requestCode, resultCode, data);  
}  
//实现裁剪方法
public void startPhotoZoom(Uri uri) {  
    if (uri == null) {  
        Log.i("tag", "The uri is not exist.");  
        return;  
    }  

    Intent intent = new Intent("com.android.camera.action.CROP");  
    if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT) {  
        String url=getPath(getActivity(),uri);  
        intent.setDataAndType(Uri.fromFile(new File(url)), "image/*");  
    }else{  
        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", 200);  
    intent.putExtra("outputY", 200);  
    intent.putExtra("return-data", true);  
    startActivityForResult(intent, RESULT_REQUEST_CODE);  
}  
//保存的方法
public void saveBitmap(Bitmap mBitmap) {  
    File f=null;
    if (isPic) {
         f = new File(Environment.getExternalStorageDirectory(),IMAGE_FILE_NAME_01); 
         personPath = Uri.fromFile(f);
    }else{
         f = new File(Environment.getExternalStorageDirectory(),IMAGE_FILE_NAME_02);  
         companyPath = Uri.fromFile(f);
    }
    try {  
        f.createNewFile();  
        FileOutputStream fOut = null;  
        fOut = new FileOutputStream(f);  
        mBitmap.compress(Bitmap.CompressFormat.JPEG, 100, fOut);  
        fOut.flush();  
        fOut.close();  
    } catch (FileNotFoundException e) {  
        e.printStackTrace();  
    } catch (IOException e) {  
        e.printStackTrace();  
    }  
}
//以下是关键,原本uri返回的是file:///...来着的,android4.4返回的是content:///...  
@SuppressLint("NewApi")  
public static String getPath(final Context context, final Uri uri) {  

    final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;  

    // DocumentProvider  
    if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {  
        // ExternalStorageProvider  
        if (isExternalStorageDocument(uri)) {  
            final String docId = DocumentsContract.getDocumentId(uri);  
            final String[] split = docId.split(":");  
            final String type = split[0];  

            if ("primary".equalsIgnoreCase(type)) {  
                return Environment.getExternalStorageDirectory() + "/" + split[1];  
            }  

        }  
        // DownloadsProvider  
        else if (isDownloadsDocument(uri)) {  
            final String id = DocumentsContract.getDocumentId(uri);  
            final Uri contentUri = ContentUris.withAppendedId(  
                    Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));  

            return getDataColumn(context, contentUri, null, null);  
        }  
        // MediaProvider  
        else if (isMediaDocument(uri)) {  
            final String docId = DocumentsContract.getDocumentId(uri);  
            final String[] split = docId.split(":");  
            final String type = split[0];  

            Uri contentUri = null;  
            if ("image".equals(type)) {  
                contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;  
            } else if ("video".equals(type)) {  
                contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;  
            } else if ("audio".equals(type)) {  
                contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;  
            }  

            final String selection = "_id=?";  
            final String[] selectionArgs = new String[] {  
                    split[1]  
            };  

            return getDataColumn(context, contentUri, selection, selectionArgs);  
        }  
    }  
    // MediaStore (and general)  
    else if ("content".equalsIgnoreCase(uri.getScheme())) {  
        // Return the remote address  
        if (isGooglePhotosUri(uri))  
            return uri.getLastPathSegment();  

        return getDataColumn(context, uri, null, null);  
    }  
    // File  
    else if ("file".equalsIgnoreCase(uri.getScheme())) {  
        return uri.getPath();  
    }  

    return null;  
}  

public static String getDataColumn(Context context, Uri uri, String selection,  
        String[] selectionArgs) {  

    Cursor cursor = null;  
    final String column = "_data";  
    final String[] projection = {  
            column  
    };  

    try {  
        cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,  
                null);  
        if (cursor != null && cursor.moveToFirst()) {  
            final int index = cursor.getColumnIndexOrThrow(column);  
            return cursor.getString(index);  
        }  
    } finally {  
        if (cursor != null)  
            cursor.close();  
    }  
    return null;  
}  


/** 
 * @param uri The Uri to check. 
 * @return Whether the Uri authority is ExternalStorageProvider. 
 */  
public static boolean isExternalStorageDocument(Uri uri) {  
    return "com.android.externalstorage.documents".equals(uri.getAuthority());  
}  

/** 
 * @param uri The Uri to check. 
 * @return Whether the Uri authority is DownloadsProvider. 
 */  
public static boolean isDownloadsDocument(Uri uri) {  
    return "com.android.providers.downloads.documents".equals(uri.getAuthority());  
}  

/** 
 * @param uri The Uri to check. 
 * @return Whether the Uri authority is MediaProvider. 
 */  
public static boolean isMediaDocument(Uri uri) {  
    return "com.android.providers.media.documents".equals(uri.getAuthority());  
}  

/** 
 * @param uri The Uri to check. 
 * @return Whether the Uri authority is Google Photos. 
 */  
public static boolean isGooglePhotosUri(Uri uri) {  
    return "com.google.android.apps.photos.content".equals(uri.getAuthority());  
}  

//至此,所有的方法都实现可以完美的通过运行,如果有不明白的可以给我留言。

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