Android:gridview
我在一个屏幕上有一个gridview,在gridview中我显示了SD卡中的所有图像,这很好。现在我想做的是,当我点击任何gridview图像时,它应该进入下一个活动,并且应该全屏显示该特定图像。我已经参考了一些其他链接,并尝试了,但没有得到正确的解决方案Android:gridview,android,gridview,Android,Gridview,我在一个屏幕上有一个gridview,在gridview中我显示了SD卡中的所有图像,这很好。现在我想做的是,当我点击任何gridview图像时,它应该进入下一个活动,并且应该全屏显示该特定图像。我已经参考了一些其他链接,并尝试了,但没有得到正确的解决方案 public class Gallary_Images extends Activity { private Cursor cursor; private int columnIndex; @Override public void o
public class Gallary_Images extends Activity {
private Cursor cursor;
private int columnIndex;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.gallery_images);
// Set up an array of the Thumbnail Image ID column we want
String[] projection = { MediaStore.Images.Thumbnails._ID };
// Create the cursor pointing to the SDCard
cursor = managedQuery(
MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, projection,
null, // Return all rows
null, MediaStore.Images.Thumbnails.IMAGE_ID);
// Get the column index of the Thumbnails Image ID
columnIndex = cursor
.getColumnIndexOrThrow(MediaStore.Images.Thumbnails._ID);
GridView sdcardImages = (GridView) findViewById(R.id.gridView1);
sdcardImages.setAdapter(new ImageAdapter(this));
// Set up a click listener
sdcardImages.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView parent, View v, int position,
long id) {
Intent i = new Intent(getApplicationContext(),
ViewGallery_Photo.class);
i.putExtra("id", position);
startActivity(i);
}
});
}
private class ImageAdapter extends BaseAdapter {
private Context context;
public ImageAdapter(Context localContext) {
context = localContext;
}
public int getCount() {
return cursor.getCount();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ImageView picturesView;
if (convertView == null) {
picturesView = new ImageView(context);
// Move cursor to current position
cursor.moveToPosition(position);
// Get the current value for the requested column
int imageID = cursor.getInt(columnIndex);
// Set the content of the image based on the provided URI
picturesView.setImageURI(Uri.withAppendedPath(
MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, ""
+ imageID));
picturesView.setScaleType(ImageView.ScaleType.FIT_CENTER);
picturesView.setPadding(8, 8, 8, 8);
picturesView
.setLayoutParams(new GridView.LayoutParams(100, 100));
} else {
picturesView = (ImageView) convertView;
}
return picturesView;
}
}
}
这是我的gridview类,我在其中调用下一个活动。现在我不知道在下一个活动中如何获取图像。请帮助…您必须尝试的第一件事是像这样在您的意图中放置图像的URi
intent.putExtra("imageUri", imageUri.toString());
其中imageUri是Uri.withAppendedPath(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_Uri,“+imageID”)
但在此之前,您必须知道您的imageID,因此整个代码必须如下所示
sdcardImages.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView parent, View v, int position,long id) {
Intent i = new Intent(getApplicationContext(),ViewGallery_Photo.class);
cursor.moveToPosition(position);
int imageID = cursor.getInt(columnIndex);
Uri imageUri = Uri.withAppendedPath(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI,
""+ imageID));
intent.putExtra("imageUri", imageUri.toString());
startActivity(i);
}
});
尝试如下:
在投影字符串中添加数据字段
public-void-onItemClick(AdapterView arg0,android.view.view v,
内部位置,长id){
Intent i=新Intent(getApplicationContext(),ViewGallery\u Photo.class);
cursor=managedQuery(
MediaStore.Images.Media.EXTERNAL\u CONTENT\u URI,列,
空,空,空);
final int dataColumnIndex=游标
.getColumnIndex(MediaStore.Images.Media.DATA);
最终int idColumIndex=1
.getColumnIndex(MediaStore.Images.Media.\u ID);
光标。移动位置(位置);
filename=cursor.getString(dataColumnIndex);
i、 putExtra(“图像路径”,文件名);
星触觉(i);
感谢您的回复Whizzkey…我将尝试此代码,并让您知道此代码是否有效。。
String[] columns = { MediaStore.Images.Media.DATA,
MediaStore.Images.Media._ID };
public void onItemClick(AdapterView<?> arg0, android.view.View v,
int position, long id) {
Intent i = new Intent(getApplicationContext(),ViewGallery_Photo.class);
cursor = managedQuery(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, columns,
null, null, null);
final int dataColumnIndex = cursor
.getColumnIndex(MediaStore.Images.Media.DATA);
final int idColumIndex = actualimagecursor
.getColumnIndex(MediaStore.Images.Media._ID);
cursor.moveToPosition(position);
filename = cursor.getString(dataColumnIndex);
i.putExtra("imagePath", filename );
startActivity(i);