Kotlin Recycler Views - Revision history

Chris at 02:29, 30 November 2017

2017-11-30T02:29:54Z

Chris at 02:26, 30 November 2017

2017-11-30T02:26:15Z

Chris at 02:18, 30 November 2017

2017-11-30T02:18:38Z

Chris: Created page with "For recycler we will NOt have setOnItemClickListener as below:

  override fun onCreate(savedInstanceState: Bundle?) {         super.onCreate(savedInstanceState)         s..."

2017-11-30T01:13:23Z

Created page with "For recycler we will NOt have setOnItemClickListener as below: <pre> override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) s..."

New page

For recycler we will NOt have setOnItemClickListener as below:
<pre>
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
adapter = CategoryAdapter(this, DataService.categories)
categoryListView.adapter = adapter
categoryListView.setOnItemClickListener { parent, view, position, id ->
val category = DataService.categories[position]
Toast.makeText(this, "You clicked on the ${category.title}", Toast.LENGTH_SHORT).show()
}
}
</pre>

← Older revision		Revision as of 02:29, 30 November 2017
Line 31:		Line 31:
	</pre>		</pre>
	You will then need to Sync Now (top right) to resync gradle.		You will then need to Sync Now (top right) to resync gradle.
		+
		+	Now, in your layout xml file you swap the ListView for recycleview. eg
		+	Replace
		+	<pre>
		+	<ListView
		+	...
		+	</pre>
		+	with:
		+	<pre>
		+	<android.support.v7.widget.RecyclerView
		+	...
		+	</pre>

@@ Line 24: / Line 24: @@
      implementation 'com.android.support:appcompat-v7:26.1.0'
      implementation 'com.android.support.constraint:constraint-layout:1.0.2'
-     compile 'com.android.support:recyclerview-v7:27.0.1'
+     compile 'com.android.support:recyclerview-v7:26.1.0'
      testImplementation 'junit:junit:4.12'
      androidTestImplementation 'com.android.support.test:runner:1.0.1'

← Older revision		Revision as of 02:18, 30 November 2017
Line 12:		Line 12:
	}		}
	</pre>		</pre>
		+
		+	Instead:
		+
		+	We need to add the recycler support library:
		+	*Open build.gradle (Module: app)
		+	*In dependencies create a space after implementations, press alt-enter, add library dependency, then choose the one with recyclerview. This may ass it at the bottom, you can move it up. It should be something like this:
		+	<pre>
		+	dependencies {
		+	implementation fileTree(dir: 'libs', include: ['*.jar'])
		+	implementation"org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
		+	implementation 'com.android.support:appcompat-v7:26.1.0'
		+	implementation 'com.android.support.constraint:constraint-layout:1.0.2'
		+	compile 'com.android.support:recyclerview-v7:27.0.1'
		+	testImplementation 'junit:junit:4.12'
		+	androidTestImplementation 'com.android.support.test:runner:1.0.1'
		+	androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
		+	}
		+	</pre>
		+	You will then need to Sync Now (top right) to resync gradle.