1.21 Clicking on list item opens EditorActivity

app/src/main/AndroidManifest.xml

@@ -29,7 +29,6 @@
         </activity>
         <activity
             android:name=".EditorActivity"
-            android:label="@string/editor_activity_title_new_pet"
             android:theme="@style/EditorTheme"
             android:parentActivityName=".CatalogActivity" >
             <!-- Parent activity meta-data to support 4.0 and lower -->

app/src/main/java/com/example/android/pets/CatalogActivity.java

@@ -16,6 +16,7 @@
 package com.example.android.pets;
 
 import android.app.LoaderManager;
+import android.content.ContentUris;
 import android.content.ContentValues;
 import android.content.CursorLoader;
 import android.content.Intent;
@@ -28,6 +29,7 @@
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
+import android.widget.AdapterView;
 import android.widget.ListView;
 
 import com.example.android.pets.data.PetContract.PetEntry;
@@ -71,6 +73,28 @@ public void onClick(View view) {
         mCursorAdapter = new PetCursorAdapter(this, null);
         petListView.setAdapter(mCursorAdapter);
 
+        // Setup the item click listener
+        petListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
+            @Override
+            public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
+                // Create new intent to go to {@link EditorActivity}
+                Intent intent = new Intent(CatalogActivity.this, EditorActivity.class);
+
+                // Form the content URI that represents the specific pet that was clicked on,
+                // by appending the "id" (passed as input to this method) onto the
+                // {@link PetEntry#CONTENT_URI}.
+                // For example, the URI would be "content://com.example.android.pets/pets/2"
+                // if the pet with ID 2 was clicked on.
+                Uri currentPetUri = ContentUris.withAppendedId(PetEntry.CONTENT_URI, id);
+
+                // Set the URI on the data field of the intent
+                intent.setData(currentPetUri);
+
+                // Launch the {@link EditorActivity} to display the data for the current pet.
+                startActivity(intent);
+            }
+        });
+
         // Kick off the loader
         getLoaderManager().initLoader(PET_LOADER, null, this);
     }

app/src/main/java/com/example/android/pets/EditorActivity.java

@@ -16,6 +16,7 @@
 package com.example.android.pets;
 
 import android.content.ContentValues;
+import android.content.Intent;
 import android.net.Uri;
 import android.os.Bundle;
 import android.support.v4.app.NavUtils;
@@ -61,6 +62,21 @@ protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_editor);
 
+        // Examine the intent that was used to launch this activity,
+        // in order to figure out if we're creating a new pet or editing an existing one.
+        Intent intent = getIntent();
+        Uri currentPetUri = intent.getData();
+
+        // If the intent DOES NOT contain a pet content URI, then we know that we are
+        // creating a new pet.
+        if (currentPetUri == null) {
+            // This is a new pet, so change the app bar to say "Add a Pet"
+            setTitle(getString(R.string.editor_activity_title_new_pet));
+        } else {
+            // Otherwise this is an existing pet, so change app bar to say "Edit Pet"
+            setTitle(getString(R.string.editor_activity_title_edit_pet));
+        }
+
         // Find all relevant views that we will need to read user input from
         mNameEditText = (EditText) findViewById(R.id.edit_pet_name);
         mBreedEditText = (EditText) findViewById(R.id.edit_pet_breed);

app/src/main/res/values/strings.xml

@@ -29,6 +29,9 @@
     <!-- Title for the activity to add a new pet [CHAR LIMIT=20] -->
     <string name="editor_activity_title_new_pet">Add a Pet</string>
 
+    <!-- Title for the activity to edit an existing pet [CHAR LIMIT=20] -->
+    <string name="editor_activity_title_edit_pet">Edit Pet</string>
+
     <!-- Label for editor menu option to save pet and leave editor [CHAR LIMIT=20] -->
     <string name="action_save">Save</string>