Android上传头像，图片剪裁，压缩图片

private byte[] mContent = new byte[1024];// 保存照片转换后的字节，用与上传到服务器
private Bitmap myBitmap;
private static final int REQUEST_CAMERA = 1;
private static final int REQUEST_CALENDAR = 2;

public void camera() {
final CharSequence[] items = { "相册", "拍照" };
AlertDialog dlg = new AlertDialog.Builder(PersonDataActivity.this)
.setTitle("选择图片")
.setItems(items, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int item) {
// 这里item是根据选择的方式，

// 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 getImageByCamera = new Intent(
"android.media.action.IMAGE_CAPTURE");
startActivityForResult(getImageByCamera,
REQUEST_CAMERA);
} else {
Intent getImage = new Intent(
Intent.ACTION_GET_CONTENT);
getImage.addCategory(Intent.CATEGORY_OPENABLE);
getImage.setType("image/jpeg");
startActivityForResult(getImage, 0);
}
}
}).create();
dlg.show();
}

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
ContentResolver resolver = getContentResolver();
if (requestCode == 0) {
try {
Uri originalUri = data.getData();
startPhotoZoom(originalUri);// 图片剪裁
Bitmap bm = yasuo(originalUri);
// Bitmap bm = (Bitmap) data.getExtras().get("data");
// Bitmap bb = ThumbnailUtils.extractThumbnail(bm, 420, 320);
Uri uri = Uri.parse(MediaStore.Images.Media.insertImage(
getContentResolver(), bm, null, null));

mContent = CameraUtils.readStream(resolver.openInputStream(Uri
.parse(uri.toString())));
// 将字节数组转换为ImageView可调用的Bitmap对象
// myBitmap = CameraUtils.getPicFromBytes(mContent, null);
// //把得到的图片绑定在控件上显示
// img_touxiang.setImageBitmap(myBitmap);
// 处理圆角
// Bitmap icon = CameraUtils.toRoundCorner(myBitmap);
// img_touxiang.setImageBitmap(icon);
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
} else if (requestCode == REQUEST_CAMERA) {
try {
super.onActivityResult(requestCode, resultCode, data);
Bundle extras = data.getExtras();
myBitmap = (Bitmap) extras.get("data");
ByteArrayOutputStream baos = new ByteArrayOutputStream();
myBitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
mContent = baos.toByteArray();
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
// iv_icon.setImageBitmap(Utils.toRoundCorner(myBitmap, 10));//
// 把拍摄的照片转成圆角显示在预览控件上
// Bitmap icon = Utils.toRoundCorner(myBitmap, 65);
// img_touxiang.setImageBitmap(myBitmap);

} else if (requestCode == REQUEST_CALENDAR) {
if (requestCode == RESULT_OK) {

}
}
if (data != null) {
getImageToView(data);
}
// 上传到数据库，并修改页面图像
HashMap<String, Object> map = service.updateAvatar(uid, mContent,
"android", String.valueOf(1020));
if (map != null && !"".equals(map.get("newAvatar").toString())) {
// 处理返回的新头像地址
// 重新保存图片
spf = getSharedPreferences("data", 0);
Editor e = spf.edit();
e.putString("avatar", map.get("newAvatar").toString());
e.commit();

} else {
Utils.showToast(PersonDataActivity.this, "上传头像失败");
}
}

/**
* 裁剪图片方法实现
*
* @param uri
*/
public void startPhotoZoom(Uri uri) {

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 getImageToView(Intent data) {
Bundle extras = data.getExtras();
if (extras != null) {
Bitmap photo = extras.getParcelable("data");
Drawable drawable = new BitmapDrawable(photo);
img_touxiang.setImageDrawable(drawable);
}
}

/**

*压缩图片

*

private Bitmap yasuo(Uri uri) {
Bitmap bitmap = null;
try {

BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
bitmap = BitmapFactory.decodeStream(this.getContentResolver()
.openInputStream(uri), null, options);
int picWidth = options.outWidth;
int picHeight = options.outHeight;
WindowManager windowManager = getWindowManager();
Display display = windowManager.getDefaultDisplay();
int screenWidth = display.getWidth();
int screenHeight = display.getHeight();
options.inSampleSize = 1;
if (picWidth > picHeight) {
if (picWidth > screenWidth)
options.inSampleSize = picWidth / screenWidth;
} else {
if (picHeight > screenHeight)
options.inSampleSize = picHeight / screenHeight;
}
options.inJustDecodeBounds = false;
bitmap = BitmapFactory.decodeStream(this.getContentResolver()
.openInputStream(uri), null, options);
img_touxiang.setImageBitmap(bitmap);
/*
* if (bitmap.isRecycled() == false) { bitmap.recycle(); }
*/
System.gc();
} catch (Exception e1) {
}
return bitmap;

}