android-gridview - w3toppers.com

implement AsyncTask in Fragment android

There is easy step to crate asyntask within fragment in your fragment place code on activityCreateview new MyAsyncTask(getActivity(), mListView).execute(“”); getActivity() is method to communicate with fragment and activity in asynstak on post context.mListView.setArrayAdapter(………..) here is public class SalesFragment extends Fragment { GridView gridView; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View gv … Read more

java.lang.illegalstateexception could not find a method (view) in the activity class android fragment

You can’t register the onClick callback(using android:onClick) for the Button(from the layout of the Dialog) in the Fragment class because Android will not find it as it will search only the Activity for a method matching that name(Btn_pumpInfo_Clicked) and it will throw that exception. Instead look for the Button in the Dialog and assign it … Read more

Add an array of buttons to a GridView in an Android application

In the following code, you should change the upper limits of the for to a variable. public class MainActivity extends Activity implements View.OnClickListener { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); TableLayout layout = new TableLayout (this); layout.setLayoutParams( new TableLayout.LayoutParams(4,5) ); layout.setPadding(1,1,1,1); for (int f=0; f<=13; f++) { TableRow tr = new TableRow(this); for (int … Read more

GridView VS GridLayout in Android Apps

A GridView is a ViewGroup that displays items in two-dimensional scrolling grid. The items in the grid come from the ListAdapter associated with this view. This is what you’d want to use (keep using). Because a GridView gets its data from a ListAdapter, the only data loaded in memory will be the one displayed on … Read more

gridView with different cells sizes, pinterest style

Is it a bit late to answer? check this library from etsy. it looks very promising. https://github.com/etsy/AndroidStaggeredGrid I think it is newer version of https://github.com/maurycyw/StaggeredGridView . Updated. Try using RecyclerView StaggeredGridLayoutManager from google instead RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recycler_view); recyclerView.setLayoutManager(new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL)); recyclerView.setItemAnimator(new DefaultItemAnimator()); recyclerView.setAdapter(adapter);

how to run media scanner in android

I have found it best (faster/least overhead) to run media scanner on a specific file (vs running it to scan all files for media), if you know the filename. Here’s the method I use: /** * Sends a broadcast to have the media scanner scan a file * * @param path * the file to … Read more

GridView rows overlapping: how to make row height fit the tallest item?

I used a static array to drive max heights for the row. This is not perfect since the earlier columns will not be resized until the cell is redisplayed. Here is the code for the inflated reusable content view. Edit: I got this work correctly but I had pre-measure all cells before rendering. I did … Read more

RecyclerView Item Click Listener the Right Way

You need to check this tutorial here for better understanding on how you can achieve the behaviour that you want. In case of handling the onClickListener from your activity you need to work based on a callback implementation with an interface. Pass the interface from the activity to your adapter and then call the callback … Read more

Gridview with two columns and auto resized images

Here’s a relatively easy method to do this. Throw a GridView into your layout, setting the stretch mode to stretch the column widths, set the spacing to 0 (or whatever you want), and set the number of columns to 2: res/layout/main.xml <?xml version=”1.0″ encoding=”utf-8″?> <FrameLayout xmlns:android=”http://schemas.android.com/apk/res/android” android:layout_width=”match_parent” android:layout_height=”match_parent”> <GridView android:id=”@+id/gridview” android:layout_width=”match_parent” android:layout_height=”match_parent” android:verticalSpacing=”0dp” android:horizontalSpacing=”0dp” android:stretchMode=”columnWidth” … Read more

How ListView’s recycling mechanism works

Initially, I was also unaware of listview recycling and the convertview usage mechanism, but after a whole days research I pretty much understand the mechanisms of the list view by referring to an image from android.amberfog Whenever your listview is filled by an adapter it basically shows the number of Rows that the listview can … Read more