我有一个问题。 当我尝试从相机获取的图片,质量是非常低的。 起初,使用相机拍摄的照片,比保存的目录,并在同一时间获得该图片并显示在保存的目录里面我app.The图片是一个优良的品质,但是当我从目录中得到它,质量低。 下面是我的示例代码:
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
if (requestCode == CAMERA_PIC_REQUEST) {
Bitmap thumbnail = (Bitmap) intent.getExtras().get("data");
if (g==1)
{
ImageView myImage = (ImageView) findViewById(R.id.img5);
myImage.setImageBitmap(thumbnail);
View a = findViewById(R.id.img5);
a.setVisibility(View.VISIBLE);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
thumbnail.compress(Bitmap.CompressFormat.JPEG, 100, stream);
byteArray1 = stream.toByteArray();
}
}
任何解决方案/建议吗? 谢谢 :)
解决了
当我按照给出的代码解决的问题Antrromet以下
我用下面的代码,这工作完全正常,我。
values = new ContentValues();
values.put(MediaStore.Images.Media.TITLE, "New Picture");
values.put(MediaStore.Images.Media.DESCRIPTION, "From your Camera");
imageUri = getContentResolver().insert(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
startActivityForResult(intent, PICTURE_RESULT);
并且
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case PICTURE_RESULT:
if (requestCode == PICTURE_RESULT)
if (resultCode == Activity.RESULT_OK) {
try {
thumbnail = MediaStore.Images.Media.getBitmap(
getContentResolver(), imageUri);
imgView.setImageBitmap(thumbnail);
imageurl = getRealPathFromURI(imageUri);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
和
public String getRealPathFromURI(Uri contentUri) {
String[] proj = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(contentUri, proj, null, null, null);
int column_index = cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
我会给你为我工作的东西。 我问过同样的!
解决方案保存图片在一个特定的文件夹,而不丧失质量
我找到了解决办法:
// 创建一个新的文件夹代码:
String path = String.valueOf(Environment.getExternalStorageDirectory()) + "/your_name_folder";
try {
File ruta_sd = new File(path);
File folder = new File(ruta_sd.getAbsolutePath(), nameFol);
boolean success = true;
if (!folder.exists()) {
success = folder.mkdir();
}
if (success) {
Toast.makeText(MainActivity.this, "Carpeta Creada...", Toast.LENGTH_SHORT).show();
}
} catch (Exception ex) {
Log.e("Carpetas", "Error al crear Carpeta a tarjeta SD");
}
Intent i = new Intent(MainActivity.this, MainActivity.class);
startActivity(i);
finish();//agregue este
// 方法拍照
public void clickFoto(View view) {
takePic();
}
// takePic()
private void takePic() {
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
*File file = new File(Environment.getExternalStorageDirectory(), "/your_name_folder/a" + "/photo_" + timeStamp + ".png");*
imageUri = Uri.fromFile(file);
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
startActivityForResult(intent, PICTURE_RESULT);
}
// onActivityResult
public void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case PICTURE_RESULT:
if (requestCode == PICTURE_RESULT)
if (resultCode == Activity.RESULT_OK) {
try {
Bitmap thumbnail = MediaStore.Images.Media.getBitmap(
getContentResolver(), imageUri);
imgFoto.setImageBitmap(thumbnail);
imageurl = getRealPathFromURI(imageUri);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
// getRealPathFromUri
public String getRealPathFromURI(Uri contentUri) {
String[] proj = {MediaStore.Images.Media.DATA};
Cursor cursor = managedQuery(contentUri, proj, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}