Text color by programmatically created grid view c

问题:

I understand how to do this in design view, but I'm not sure how to create a style based on programmatically created elements. I followed a tutorial and here's where I'm at:

I have a grid view which is populated by a string array as in the code below:

...
gridView = (GridView) findViewById(R.id.gridView);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, strData);
gridView.setAdapter(adapter);

Each element of the string array populates the grid just fine.

How would I set the text color of the items added to the gridView?

回答1:

2 solutions: dynamically or with a custom layout.

• Dynamically: you can set a text color by using setTextColor(...) when you Override the getView() method in your ArrayAdapter, something like this:

  gridview.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, strData) {
      @Override
      public View getView(int position, View convertView, ViewGroup parent) {
          View view = super.getView(position, convertView, parent);
          TextView text = (TextView) view.findViewById(android.R.id.text1);
          text.setTextColor(getResources().getColor(R.color.my_color));
          return view;
      }
  });
  

• Custom Layout: this is the simplest way, build a custom layout as:

  <?xml version="1.0" encoding="utf-8"?>
  <TextView xmlns:android="http://schemas.android.com/apk/res/android"
      android:id="@+id/tv"
      android:layout_height="fill_parent"
      android:layout_width="fill_parent"
      android:textColor="@color/my_color"
      android:background="@drawable/my_background"
      android:padding="5sp"
      android:singleLine="true"
      android:gravity="center" />  
  

  Then, set it to your adapter:

  ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.my_layout_above, strData);
  

Even if, you wanted this dynamically, I'm not sure but I think it's better to do with a custom layout.
Hope this helps.

回答2:

By creating a custom layout and supplying it to your ArrayAdapter. Currently you are supplying the default layout android.R.layout.simple_list_item_1. Create a new layout xml like this:

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
          android:id="@+id/flFragmentContainer"
          android:layout_width="match_parent"
          android:layout_height="match_parent">


    <TextView
            android:id="@+id/tvText"
            android:layout_width="wrap_content" 
            android:layout_height="wrap_content"/>

</RelativeLayout>

And style it however you want.

You can use it like this:

ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.custom_layout, R.id.tvText, strData);