MainActivity.java
public class MainActivity extends ListActivity {
private static final int CAMERA_CAPTURE = 20;
ArrayList<String> listOfImages;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
DisplayCapturedImagesFromCamera();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_camera) {
startCameraCapture();
return true;
}
return super.onOptionsItemSelected(item);
}
private void startCameraCapture() {
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
if (cameraIntent.resolveActivity(getPackageManager()) != null) {
File photoFile = null;
try {
photoFile = CreateImageFile();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if(photoFile != null)
{
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));
startActivityForResult(cameraIntent, CAMERA_CAPTURE);
}
}
}
private File CreateImageFile() throws IOException
{
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "Image_" + timeStamp + "_";
File storageDirectory = getExternalFilesDir("");
File image = File.createTempFile(imageFileName, ".jpg",storageDirectory);
return image;
}
@Override
public void onActivityResult(final int requestCode, int resultCode, Intent data) {
switch(requestCode)
{
case CAMERA_CAPTURE:
if(resultCode == RESULT_OK)
{
DisplayCapturedImagesFromCamera();
}
break;
}
}
private void DisplayCapturedImagesFromCamera() {
// TODO Auto-generated method stub
File myPath = getExternalFilesDir(null);
listOfImages = new ArrayList<String>();
try
{
for(File f: myPath.listFiles()) {
listOfImages.add(f.getAbsolutePath());
}
AdptAddjobsGallery adapter = new AdptAddjobsGallery(MainActivity.this,listOfImages);
setListAdapter(adapter);
}
catch(Exception ex)
{
Log.w("Error", ex.getMessage());
}
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
// TODO Auto-generated method stub
super.onListItemClick(l, v, position, id);
// custom dialog
final Dialog dialog = new Dialog(MainActivity.this);
dialog.setContentView(R.layout.cust_dialog);
dialog.setTitle("Image ");
Bitmap bitmap = BitmapFactory.decodeFile(listOfImages.get(position));
// set the custom dialog components - text, image and button
ImageView image = (ImageView) dialog.findViewById(R.id.image);
image.setImageBitmap(bitmap);
Button dialogButton = (Button) dialog.findViewById(R.id.dialogButtonOK);
// if button is clicked, close the custom dialog
dialogButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
dialog.dismiss();
}
});
dialog.show();
}
}
AdptAddjobsGallery.java
public class AdptAddjobsGallery extends ArrayAdapter<String> {
private final Activity context;
private final ArrayList<String> listOfImages;
public AdptAddjobsGallery(Activity context, ArrayList<String> listOfImages) {
super(context, R.layout.adpt_addjobs_gallery, listOfImages);
// TODO Auto-generated constructor stub
this.context=context;
this.listOfImages = listOfImages;
}
public View getView(int position,View view,ViewGroup parent) {
ViewHolder holder;
if(view == null)
{
LayoutInflater inflater=context.getLayoutInflater();
view =inflater.inflate(R.layout.adpt_addjobs_gallery, null,true);
holder = new ViewHolder();
holder.imageView = (ImageView) view.findViewById(R.id.selfie);
holder.txtTitle = (TextView) view.findViewById(R.id.fileName);
view.setTag(holder);
}
else
{
holder = (ViewHolder) view.getTag();
}
Bitmap bitmap = BitmapFactory.decodeFile(listOfImages.get(position));
File f = new File(listOfImages.get(position));
holder.txtTitle.setText(f.getName());
holder.imageView.setImageBitmap(bitmap);
return view;
};
}
class ViewHolder {
TextView txtTitle;
ImageView imageView;
}
答案 0 :(得分：0)
使用file.lastmodified()方法尝试此操作。
private ArrayList<String> getRecentImages(long from, long to,
ArrayList<String> list) {
ArrayList<String> sortedList = new ArrayList<String>();
for (int i = 0; i < list.size(); i++) {
File file = new File(list.get(i));
long modified = file.lastModified();
if (modified > from && modified <= to) {
sortedList.add(list.get(i));
}
}
return sortedList;
}