我是
Android的新手.我想将我的位图存储在sharedPreferences中.有谁能告诉我怎么可能吗？其实我的要求是,我从画廊获取图像,以及从相机拍摄照片,我在ImageView中设置了Bitmap.这些都是正常的.但是当我点击后退按钮,所有的ImageView都将为空.
所以我想在我的应用程序中存储该位图.
有人可以帮我吗我非常坚持这个.
谢谢.
解决方法@H_404_10@
嘿朋友我得到了我的问题的解决方案在这里我发布我的代码,以便其他人可以使用这个解决方案..
1).在按钮上点击 – 打开相机拍摄图像
ContentValues values = new ContentValues();
values.put(MediaStore.Images.Media.TITLE,fileName);
mCapturedImageURI = getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,values);
Intent cameraIntent = new Intent("android.media.action.IMAGE_CAPTURE");
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT,mCapturedImageURI);
startActivityForResult(cameraIntent,CAMERA_REQUEST);
2).在按钮cllick – 打开图库选择图像
Intent galleryintent = new Intent(Intent.ACTION_GET_CONTENT);
galleryintent.setType("image/*");
startActivityForResult(galleryintent,IMAGE_PICK);
3).静态变量
private static final int CAMERA_REQUEST = 0;
private static final int IMAGE_PICK = 1;
4). onActivityResult
protected void onActivityResult(int requestCode,int resultCode,Intent data)
{
switch(requestCode)
{
case CAMERA_REQUEST:
if(resultCode == RESULT_OK)
{
String[] projection = { MediaStore.Images.Media.DATA};
Cursor cursor = managedQuery(mCapturedImageURI,projection,null,null);
int column_index_data = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
String capturedImageFilePath = cursor.getString(column_index_data);
Log.d("photos*******"," in camera take int "+capturedImageFilePath);
Bitmap photo_camera = BitmapFactory.decodeFile(capturedImageFilePath,options);
if(data != null)
{
img_1.setImageBitmap(photo_camera);
prefsEditor.putString(Global.PHOTO_1,capturedImageFilePath);
}
}
case IMAGE_PICK:
if(resultCode == RESULT_OK)
{
Uri selectedImage = data.getData();
String[] filePathColumn = {MediaStore.Images.Media.DATA};
Cursor cursor = getContentResolver().query(selectedImage,filePathColumn,null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String filePath = cursor.getString(columnIndex);
cursor.close();
// Bitmap photo = BitmapFactory.decodeFile(filePath);
Bitmap photo_gallery = BitmapFactory.decodeFile(filePath,options);
img_1.setImageBitmap(photo_gallery);
prefsEditor.putString(Global.PHOTO_1,filePath);
}
}
prefsEditor.commit();
}
5).在onDestroy()
你必须销毁你设置的所有位图.
@Override
public void onDestroy()
{
super.onDestroy();
if(photo_camera != null)
{
photo_camera.recycle();
}
if(photo_gallery != null)
{
photo_gallery.recycle();
}
}
6).当您从sharedPrefrences获取数据时,您必须将字符串转换为Bitmap,然后可以在ImageView中设置位图.例如Bitmap bit1 = BitmapFactory.decodeFile(strimg1);然后设置,imageView.setImageBitmap
1).在按钮上点击 – 打开相机拍摄图像
ContentValues values = new ContentValues();
values.put(MediaStore.Images.Media.TITLE,fileName);
mCapturedImageURI = getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,values);
Intent cameraIntent = new Intent("android.media.action.IMAGE_CAPTURE");
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT,mCapturedImageURI);
startActivityForResult(cameraIntent,CAMERA_REQUEST);
2).在按钮cllick – 打开图库选择图像
Intent galleryintent = new Intent(Intent.ACTION_GET_CONTENT);
galleryintent.setType("image/*");
startActivityForResult(galleryintent,IMAGE_PICK);
3).静态变量
private static final int CAMERA_REQUEST = 0;
private static final int IMAGE_PICK = 1;
4). onActivityResult
protected void onActivityResult(int requestCode,int resultCode,Intent data)
{
switch(requestCode)
{
case CAMERA_REQUEST:
if(resultCode == RESULT_OK)
{
String[] projection = { MediaStore.Images.Media.DATA};
Cursor cursor = managedQuery(mCapturedImageURI,projection,null,null);
int column_index_data = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
String capturedImageFilePath = cursor.getString(column_index_data);
Log.d("photos*******"," in camera take int "+capturedImageFilePath);
Bitmap photo_camera = BitmapFactory.decodeFile(capturedImageFilePath,options);
if(data != null)
{
img_1.setImageBitmap(photo_camera);
prefsEditor.putString(Global.PHOTO_1,capturedImageFilePath);
}
}
case IMAGE_PICK:
if(resultCode == RESULT_OK)
{
Uri selectedImage = data.getData();
String[] filePathColumn = {MediaStore.Images.Media.DATA};
Cursor cursor = getContentResolver().query(selectedImage,filePathColumn,null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String filePath = cursor.getString(columnIndex);
cursor.close();
// Bitmap photo = BitmapFactory.decodeFile(filePath);
Bitmap photo_gallery = BitmapFactory.decodeFile(filePath,options);
img_1.setImageBitmap(photo_gallery);
prefsEditor.putString(Global.PHOTO_1,filePath);
}
}
prefsEditor.commit();
}
5).在onDestroy()
你必须销毁你设置的所有位图.
@Override
public void onDestroy()
{
super.onDestroy();
if(photo_camera != null)
{
photo_camera.recycle();
}
if(photo_gallery != null)
{
photo_gallery.recycle();
}
}
6).当您从sharedPrefrences获取数据时,您必须将字符串转换为Bitmap,然后可以在ImageView中设置位图.例如Bitmap bit1 = BitmapFactory.decodeFile(strimg1);然后设置,imageView.setImageBitmap
