android 选择照片(相册/拍照/切图)

private static final int PHOTO_REQUEST_CAREMA = 0;//相机拍照
private static final int PHOTO_REQUEST_GALLERY = 1;//从相册中选择
private static final int PHOTO_REQUEST_CUT = 2;//剪切结果结果
private static final String PHOTO_FILE_NAME = "zhuangxiaomi_head.jpg";
private File headPhotoFile;

<pre name="code" class="java">  /**从相册中获取*/
private void gallery(){
// 激活系统图库，选择一张图片
Intent intent = new Intent(Intent.ACTION_PICK);
intent.setType("image/*");
// 开启一个带有返回值的Activity，请求码为PHOTO_REQUEST_GALLERY
startActivityForResult(intent, PHOTO_REQUEST_GALLERY);
}

/**从相机获取*/
public void camera() {
// 激活相机
Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
// 判断存储卡是否可以用，可用进行存储
if (hasSdcard()) {
headPhotoFile = new File(Environment.getExternalStorageDirectory(),PHOTO_FILE_NAME);
// 从文件中创建uri
Uri uri = Uri.fromFile(headPhotoFile);
intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
}
// 开启一个带有返回值的Activity，请求码为PHOTO_REQUEST_CAREMA
startActivityForResult(intent, PHOTO_REQUEST_CAREMA);
}

/**剪切图片*/
private void crop(Uri uri) {
// 裁剪图片意图
Intent intent = new Intent("com.android.camera.action.CROP");
intent.setDataAndType(uri, "image/*");
intent.putExtra("crop", "true");
// 裁剪框的比例，1：1
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
// 裁剪后输出图片的尺寸大小
intent.putExtra("outputX", 250);
intent.putExtra("outputY", 250);

intent.putExtra("outputFormat", "JPEG");// 图片格式
intent.putExtra("noFaceDetection", true);// 取消人脸识别
intent.putExtra("return-data", true);
// 开启一个带有返回值的Activity，请求码为PHOTO_REQUEST_CUT
startActivityForResult(intent, PHOTO_REQUEST_CUT);
}

/**判断sdcard是否被挂载*/
private boolean hasSdcard() {
if (Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED)) {
return true;
} else {
return false;
}
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == PHOTO_REQUEST_GALLERY) {/**从相册返回的数据*/

if (data != null) {
// 得到图片的全路径
Uri uri = data.getData();
crop(uri);
}

} else if (requestCode == PHOTO_REQUEST_CAREMA) {/**从相机返回的数据*/

if (hasSdcard()) {
crop(Uri.fromFile(headPhotoFile));
} else {
makeToast("未找到存储卡，无法存储照片！");
}

} else if (requestCode == PHOTO_REQUEST_CUT) {/**从剪切图片返回的数据*/

if (data != null) {
Bitmap bitmap = data.getParcelableExtra("data");
//                this.headImage.setImageBitmap(bitmap);//显示剪切后的图片
byte[] b = BitmapUtil.getImageBytes(bitmap);/**压缩图片*/
String s = Base64.encodeToString(b, Base64.NO_WRAP);
//                submitHead(s);
}
try {
// 将临时文件删除
headPhotoFile.delete();
} catch (Exception e) {
e.printStackTrace();
}
}

super.onActivityResult(requestCode, resultCode, data);
}

<pre name="code" class="java">/**选择框*/
private void showDialog(){
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setItems(new String[]{getString(R.string.profile_account_setting_photos), getString(R.string.profile_account_setting_select_pic)}, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
switch (which){
case PHOTO_REQUEST_CAREMA:
camera();
break;
case PHOTO_REQUEST_GALLERY:
gallery();
break;
}
}
});
builder.show();
}