Android拍照和取相册并裁切

1.先弹出框有两个选项:

public void camera() {  final CharSequence[] items = { "相册", "拍照" };  AlertDialog dlg = new AlertDialog.Builder(SettingFragment.this.mAct)    .setTitle("选择图片")    .setItems(items, new DialogInterface.OnClickListener() {     public void onClick(DialogInterface dialog, int item) {      // 在items数组里面定义了两种方式，拍照的下标为1所以就调用拍照方法      if (item == 1) {       Intent intent = new Intent(         MediaStore.ACTION_IMAGE_CAPTURE);

//去拍照       startActivityForResult(intent, REQUEST_CAMERA);      } else {       Intent getImage = new Intent(         Intent.ACTION_GET_CONTENT);       getImage.addCategory(Intent.CATEGORY_OPENABLE);       getImage.setType("image/*");       startActivityForResult(getImage, 0);      }     }    }).create();  dlg.show(); }

2.拍照和相册事件完成后会回调OnActivityResult里面，requestCode是启动事件标识，resultCode是回调状态码 -1 0 1：

@Overridepublic void onActivityResult(int requestCode, int resultCode, Intent data) {// TODO Auto-generated method stubsuper.onActivityResult(requestCode, resultCode, data);if (requestCode == 2) {Bitmap tempPhoto = null;if (data != null) {tempPhoto = (Bitmap) data.getExtras().get("data");if (tempPhoto == null) {return;}//img_head是ImageView设置图片img_head.setImageBitmap(tempPhoto);

//读取图片压缩流数据

file = CropUtil.makeTempFile(SettingFragment.this.getActivity(),tempPhoto,FileNameGenerator.generator(System.currentTimeMillis()+ "hupu")+ ".png");file_path = file.getAbsolutePath();}}if (requestCode == REQUEST_CAMERA||requestCode == 0) {Intent intent = new Intent("com.android.camera.action.CROP");        intent.setDataAndType(data.getData(), "image/*");        intent.putExtra("crop", "true");        intent.putExtra("aspectX", 1); //设置按长和宽的比例裁剪        intent.putExtra("aspectY", 1);        intent.putExtra("outputX", 180); //设置输出的大小        intent.putExtra("outputY", 180);        intent.putExtra("scale", true); //设置是否允许拉伸        // 如果要在给定的uri中获取图片，则必须设置为false，如果设置为true，那么便不会在给定的uri中获取到裁剪的图片        intent.putExtra("return-data", true);        intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());//设置输出格式        intent.putExtra("noFaceDetection", true); // 无需人脸识别  默认不需要设置        startActivityForResult(intent, 2);}}

 

3.读取图片缓存本地，并压缩文件流数据返回文件类型：

public static File makeTempFile(Context mcontext, Bitmap photo,String nameKey) {// 判断是否有存储卡String status = Environment.getExternalStorageState();// 等比例压缩图片，将较长的一边压缩到600px一下，最大容量不超过200KByteArrayOutputStream bos = new ByteArrayOutputStream();photo.compress(CompressFormat.PNG, 100, bos);byte[] tempData = bos.toByteArray();File file2 = new File(FileNameGenerator.getExternalDir(mcontext)+ "/runing");if (file2.exists() && file2.isDirectory()) {file2.delete();}file2.mkdir();// 将压缩后的图片缓存到存储卡根目录下（权限）File bFile = new File(FileNameGenerator.getExternalDir(mcontext)+ "/runing", nameKey);FileOutputStream fos = null;try {fos = new FileOutputStream(bFile);fos.write(tempData);fos.flush();if (bFile.exists() && bFile.length() > 0)return bFile;} catch (Exception e) {e.printStackTrace();} finally {CropUtil.closeIO(null, fos);}return null;}

4.获取系统文件存储路径如下：
/** * 获取程序外部的缓存目录 *  * @param context * @return */public static File getExternalCacheDir(Context context) {return new File(Environment.getExternalStorageDirectory().getPath());}public static File getExternalDir(Context context) {return new File(getCahePath(context));}public static final String getCahePath(Context ctx) {if (cache_path == null) {cache_path = Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState()) ? getExternalCacheDir(ctx).getPath() : ctx.getCacheDir().getPath();}return cache_path;}