我正在使用gridview显示图像。 选择图像后，它将显示在新活动中。 在新活动中，有2个按钮用于捕获图像，1个用于保存图像以及从gridview中选择的图像。 我的问题是，当我从gridview中选择图像时，下一个活动中的按钮不响应。当它们响应时，未显示从gridview中选择的图像。 捕获图像和保存按钮逻辑属于不同的类。 我试图通过意图调用这些。
这是我的代码问题所在，当我使用两个意图时，也只是工作。
public class SingleItemView extends Activity {
//final static int CAMERA_RESULT = 0;
ImageView imv; private int TAKENPHOTO = 0;
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Get the view from singleitemview.xml
setContentView(R.layout.singleitemview);
// Get position from intent passed from MainActivity.java
Intent i = getIntent();
//startActivityForResult(i, 1);
int position = i.getExtras().getInt("id");
// Open the Image adapter
ImageAdapter imageAdapter = new ImageAdapter(this);
// Locate the ImageView in singleitemview.xml
ImageView imageView = (ImageView) findViewById(R.id.image);
// Get image and position from ImageAdapter.java and set into ImageView
imageView.setImageResource(imageAdapter.mThumbIds[position]);
//i = new Intent(SingleItemView.this, saveandshare.class);
// startActivityForResult(i, 1);
//Intent openNewActivity = new Intent(getApplicationContext(), saveandshare.class);
// startActivity(openNewActivity);
}
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);
if (resultCode == RESULT_OK) {
Bundle extras = intent.getExtras();
Bitmap bmp = (Bitmap) extras.get("data");
imv = (ImageView) findViewById(R.id.imageView);
imv.setImageBitmap(bmp);
}
}
答案 0 :(得分：0)
您好请尝试下面的代码，希望它能帮助您
将下面的代码写入gridView的项目点击监听器
Intent intent = new Intent(m_context, SecondActivity.class);
intent.putExtra("ImagePath", "Your Image path(either it is url or uri)");
startActivity(intent);
在第二个活动中写下以下代码
if(getIntent().getExtras() != null)
{
String path;
path = getIntent().getExtras().getString("ImagePath");
}
在按钮中输入以下代码，以便从库中选择图像 并使用Universalimageloader库来加载图像
Intent m_galleryIntent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(m_galleryIntent, 200);
@Override
protected void onActivityResult(int p_requestCode, int p_resultCode, Intent p_data)
{
if(p_requestCode == 200 && p_resultCode == RESULT_OK)
{
try
{
Uri m_selectedImageUri = p_data.getData();
m_userSelectedImagePath = getPath(m_selectedImageUri);
if(m_userSelectedImagePath.toString().startsWith("http"))
{
m_loader.displayImage(m_userSelectedImagePath, m_ivScenarioImage);
}
else
{
m_loader.displayImage("file://" + m_userSelectedImagePath, m_ivScenarioImage, m_options);
}
}
catch(Exception m_e)
{
}
}
}
将以下功能用于商店媒体
private File getOutputMediaFile()
{
File m_mediaFile;
m_builder = new StringBuilder();
m_builder.append(Constant.m_mediaDirectoryPath).append(Constant.IMAGE_DIRECTORY_NAME);
File m_imageStorageFile = new File(m_builder.toString());
// Create the storage directory if it does not exist
if(! m_imageStorageFile.exists())
{
if(! m_imageStorageFile.mkdirs())
{
return null;
}
}
// Create a media file name
String m_timeStamp = new SimpleDateFormat(Constant.TIME_STAMP_FORMAT, Locale.getDefault()).format(new java.util.Date());
m_builder = new StringBuilder();
m_builder.append(m_imageStorageFile.getPath()).append(File.separator).append("IMG_").append(m_timeStamp).append(".jpg");
m_mediaFile = new File(m_builder.toString());
return m_mediaFile;
}
在上述功能之后，您必须在保存图像按钮中编写以下代码，然后单击
try
{
String saveImagePath;
saveImagePath = getOutputMediaFile().getPath();
m_bitmap = CommonUtills.getImageBitmap(m_context, m_userSelectedImagePath, 500, 500);
ByteArrayOutputStream m_out = new ByteArrayOutputStream();
if(m_bitmap != null)
{
m_ivScenarioImage.setImageBitmap(m_bitmap);
}
}
catch(Throwable m_e)
{
}
public static Bitmap getImageBitmap(Context p_context,String p_filePath, int p_width, int p_height)
{
try
{
ExifInterface m_exif = new ExifInterface(p_filePath);
int m_rotation = m_exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);
Matrix m_localMatrix = new Matrix();
if(m_rotation == ExifInterface.ORIENTATION_ROTATE_90)
m_localMatrix.postRotate(90);
else if(m_rotation == ExifInterface.ORIENTATION_ROTATE_180)
m_localMatrix.postRotate(180);
else if(m_rotation == ExifInterface.ORIENTATION_ROTATE_270)
m_localMatrix.postRotate(270);
else
m_localMatrix.postRotate(0);
// Bitmap m_retBmp = decodeFile(p_context, p_filePath,p_width,p_height);
// Bitmap m_retBmp = ImageHelper.scaleImage(p_filePath, p_width, p_height);
// Bitmap m_retBmp = CommonUtills.decodeFile(p_context, p_filePath, p_width, p_height);
Bitmap m_retBmp = CommonUtills.scaleImage(p_context,p_filePath,p_width,p_height);
return Bitmap.createBitmap(m_retBmp, 0, 0, m_retBmp.getWidth(), m_retBmp.getHeight(), m_localMatrix, true);
}
catch(Throwable p_e)
{
}
return null;
}
public static Bitmap scaleImage(Context p_context, String p_path, int p_reqHeight, int p_reqWidth)
{
Bitmap m_retBmp = null;
try
{
System.gc();
File m_file = new File(p_path);
if (m_file.exists())
{
BitmapFactory.Options m_o2 = new BitmapFactory.Options();
m_o2.inJustDecodeBounds = true;
BitmapFactory.decodeFile(m_file.getPath(), m_o2);
m_o2.inSampleSize = calculateInSampleSize(m_o2, p_reqHeight, p_reqWidth);
m_o2.inJustDecodeBounds = false;
m_retBmp = BitmapFactory.decodeFile(m_file.getPath(), m_o2);
}
}
catch (Exception p_e)
{
}
return m_retBmp;
}
private static int calculateInSampleSize(BitmapFactory.Options p_options, int p_reqWidth, int p_reqHeight)
{
// Raw height and width of image
final int m_height = p_options.outHeight;
final int m_width = p_options.outWidth;
int m_inSampleSize = 1;
if (m_height > p_reqHeight || m_width > p_reqWidth)
{
final int m_halfHeight = m_height / 2;
final int m_halfWidth = m_width / 2;
// Calculate the largest inSampleSize value that is a power of 2 and keeps both
// height and width larger than the requested height and width.
while ((m_halfHeight / m_inSampleSize) > p_reqHeight && (m_halfWidth / m_inSampleSize) > p_reqWidth)
{
m_inSampleSize *= 2;
}
}
return m_inSampleSize;
}