Android : 01-TheActivityClass: implement

2 files changed, 76 insertions, 78 deletions

diff --git a/Android/01-TheActivityClass/ActivityLab/src/course/labs/activitylab/ActivityOne.java b/Android/01-TheActivityClass/ActivityLab/src/course/labs/activitylab/ActivityOne.java
index 83e1df7..b5c7f01 100644
--- a/Android/01-TheActivityClass/ActivityLab/src/course/labs/activitylab/ActivityOne.java
+++ b/Android/01-TheActivityClass/ActivityLab/src/course/labs/activitylab/ActivityOne.java
@@ -21,48 +21,48 @@ public class ActivityOne extends Activity {
 
     // Lifecycle counters
 
-    // TODO:
-    // Create counter variables for onCreate(), onRestart(), onStart() and
-    // onResume(), called mCreate, etc.
-    // You will need to increment these variables' values when their
-    // corresponding lifecycle methods get called
+    private int mCreate;
+    private int mStart;
+    private int mResume;
+    private int mRestart;
 
-    // TODO: Create variables for each of the TextViews, called
-    // mTvCreate, etc.
+    private TextView mTvCreate;
+    private TextView mTvStart;
+    private TextView mTvResume;
+    private TextView mTvRestart;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_one);
 
-        // TODO: Assign the appropriate TextViews to the TextView variables
-        // Hint: Access the TextView by calling Activity's findViewById()
-        // textView1 = (TextView) findViewById(R.id.textView1);
+        mTvCreate = (TextView) findViewById(R.id.create);
+        mTvStart = (TextView) findViewById(R.id.start);
+        mTvResume = (TextView) findViewById(R.id.resume);
+        mTvRestart = (TextView) findViewById(R.id.restart);
 
         Button launchActivityTwoButton = (Button) findViewById(R.id.bLaunchActivityTwo);
         launchActivityTwoButton.setOnClickListener(new OnClickListener() {
 
             @Override
             public void onClick(View v) {
-                // TODO:
-                // Launch Activity Two
-                // Hint: use Context's startActivity() method
-                // Create an intent stating which Activity you would like to start
-                // Launch the Activity using the intent
+                Intent intent = new Intent(ActivityOne.this, ActivityTwo.class);
+                startActivity(intent);
             }
         });
 
         // Check for previously saved state
         if (savedInstanceState != null) {
-            // TODO:
-            // Restore value of counters from saved state
-            // Only need 4 lines of code, one for every count variable
+            Log.i(TAG, "restore savedInstanceState");
+            mCreate = (Integer) savedInstanceState.getSerializable("mCreate");
+            mStart = (Integer) savedInstanceState.getSerializable("mStart");
+            mResume = (Integer) savedInstanceState.getSerializable("mResume");
+            mRestart = (Integer) savedInstanceState.getSerializable("mRestart");
         }
 
-        // TODO: Emit LogCat message
-        // TODO:
-        // Update the appropriate count variable
-        // Update the user interface via the displayCounts() method
+        Log.i(TAG, "onCreate()");
+        mCreate += 1;
+        displayCounts();
     }
 
     // Lifecycle callback overrides
@@ -70,53 +70,52 @@ public class ActivityOne extends Activity {
     @Override
     public void onStart() {
         super.onStart();
-        // TODO: Emit LogCat message
-        // TODO:
-        // Update the appropriate count variable
-        // Update the user interface
+        Log.i(TAG, "onStart()");
+        mStart += 1;
+        displayCounts();
     }
 
     @Override
     public void onResume() {
         super.onResume();
-        // TODO: Emit LogCat message
-        // TODO:
-        // Update the appropriate count variable
-        // Update the user interface
+        Log.i(TAG, "onResume()");
+        mResume += 1;
+        displayCounts();
     }
 
     @Override
     public void onPause() {
         super.onPause();
-        // TODO: Emit LogCat message
+        Log.i(TAG, "onPause()");
     }
 
     @Override
     public void onStop() {
         super.onStop();
-        // TODO: Emit LogCat message
+        Log.i(TAG, "onStop()");
     }
 
     @Override
     public void onRestart() {
         super.onRestart();
-        // TODO: Emit LogCat message
-        // TODO:
-        // Update the appropriate count variable
-        // Update the user interface
+        Log.i(TAG, "onRestart()");
+        mRestart += 1;
+        displayCounts();
     }
 
     @Override
     public void onDestroy() {
         super.onDestroy();
-        // TODO: Emit LogCat message
+        Log.i(TAG, "onDestroy()");
     }
 
     @Override
     public void onSaveInstanceState(Bundle savedInstanceState) {
-        // TODO:
-        // Save state information with a collection of key-value pairs
-        // 4 lines of code, one for every count variable
+        Log.i(TAG, "onSaveInstanceState()");
+        savedInstanceState.putSerializable("mCreate", mCreate);
+        savedInstanceState.putSerializable("mStart", mStart);
+        savedInstanceState.putSerializable("mResume", mResume);
+        savedInstanceState.putSerializable("mRestart", mRestart);
     }
 
     // Updates the displayed counters
diff --git a/Android/01-TheActivityClass/ActivityLab/src/course/labs/activitylab/ActivityTwo.java b/Android/01-TheActivityClass/ActivityLab/src/course/labs/activitylab/ActivityTwo.java
index edd3951..f210662 100644
--- a/Android/01-TheActivityClass/ActivityLab/src/course/labs/activitylab/ActivityTwo.java
+++ b/Android/01-TheActivityClass/ActivityLab/src/course/labs/activitylab/ActivityTwo.java
@@ -20,46 +20,46 @@ public class ActivityTwo extends Activity {
 
     // Lifecycle counters
 
-    // TODO:
-    // Create counter variables for onCreate(), onRestart(), onStart() and
-    // onResume(), called mCreate, etc.
-    // You will need to increment these variables' values when their
-    // corresponding lifecycle methods get called
+    private int mCreate;
+    private int mStart;
+    private int mResume;
+    private int mRestart;
 
-    // TODO: Create variables for each of the TextViews, called
-    // mTvCreate, etc.
+    private TextView mTvCreate;
+    private TextView mTvStart;
+    private TextView mTvResume;
+    private TextView mTvRestart;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_two);
 
-        // TODO: Assign the appropriate TextViews to the TextView variables
-        // Hint: Access the TextView by calling Activity's findViewById()
-        // textView1 = (TextView) findViewById(R.id.textView1);
+        mTvCreate = (TextView) findViewById(R.id.create);
+        mTvStart = (TextView) findViewById(R.id.start);
+        mTvResume = (TextView) findViewById(R.id.resume);
+        mTvRestart = (TextView) findViewById(R.id.restart);
 
         Button closeButton = (Button) findViewById(R.id.bClose);
         closeButton.setOnClickListener(new OnClickListener() {
 
             @Override
             public void onClick(View v) {
-                // TODO:
-                // This function closes Activity Two
-                // Hint: use Context's finish() method
+                finish();
             }
         });
 
         // Check for previously saved state
         if (savedInstanceState != null) {
-            // TODO:
-            // Restore value of counters from saved state
-            // Only need 4 lines of code, one for every count variable
+            mCreate = (Integer) savedInstanceState.getSerializable("mCreate");
+            mStart = (Integer) savedInstanceState.getSerializable("mStart");
+            mResume = (Integer) savedInstanceState.getSerializable("mResume");
+            mRestart = (Integer) savedInstanceState.getSerializable("mRestart");
         }
 
-        // TODO: Emit LogCat message
-        // TODO:
-        // Update the appropriate count variable
-        // Update the user interface via the displayCounts() method
+        Log.i(TAG, "onCreate()");
+        mCreate += 1;
+        displayCounts();
     }
 
     // Lifecycle callback methods overrides
@@ -67,53 +67,52 @@ public class ActivityTwo extends Activity {
     @Override
     public void onStart() {
         super.onStart();
-        // TODO: Emit LogCat message
-        // TODO:
-        // Update the appropriate count variable
-        // Update the user interface
+        Log.i(TAG, "onStart()");
+        mStart += 1;
+        displayCounts();
     }
 
     @Override
     public void onResume() {
         super.onResume();
-        // TODO: Emit LogCat message
-        // TODO:
-        // Update the appropriate count variable
-        // Update the user interface
+        Log.i(TAG, "onResume()");
+        mResume += 1;
+        displayCounts();
     }
 
     @Override
     public void onPause() {
         super.onPause();
-        // TODO: Emit LogCat message
+        Log.i(TAG, "onPause()");
     }
 
     @Override
     public void onStop() {
         super.onStop();
-        // TODO: Emit LogCat message
+        Log.i(TAG, "onStop()");
     }
 
     @Override
     public void onRestart() {
         super.onRestart();
-        // TODO: Emit LogCat message
-        // TODO:
-        // Update the appropriate count variable
-        // Update the user interface
+        Log.i(TAG, "onRestart()");
+        mRestart += 1;
+        displayCounts();
     }
 
     @Override
     public void onDestroy() {
         super.onDestroy();
-        // TODO: Emit LogCat message
+        Log.i(TAG, "onDestroy()");
     }
 
     @Override
     public void onSaveInstanceState(Bundle savedInstanceState) {
-        // TODO:
-        // Save counter state information with a collection of key-value pairs
-        // 4 lines of code, one for every count variable
+        Log.i(TAG, "onSaveInstanceState)");
+        savedInstanceState.putSerializable("mCreate", mCreate);
+        savedInstanceState.putSerializable("mStart", mStart);
+        savedInstanceState.putSerializable("mResume", mResume);
+        savedInstanceState.putSerializable("mRestart", mRestart);
     }
 
     // Updates the displayed counters