Android : 01-TheActivityClass: add

1 files changed, 129 insertions, 0 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
new file mode 100644
index 0000000..83e1df7
--- /dev/null
+++ b/Android/01-TheActivityClass/ActivityLab/src/course/labs/activitylab/ActivityOne.java
@@ -0,0 +1,129 @@
+package course.labs.activitylab;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.os.Bundle;
+import android.util.Log;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+import android.widget.TextView;
+
+public class ActivityOne extends Activity {
+
+    private static final String RESTART_KEY = "restart";
+    private static final String RESUME_KEY = "resume";
+    private static final String START_KEY = "start";
+    private static final String CREATE_KEY = "create";
+
+    // String for LogCat documentation
+    private final static String TAG = "Lab-ActivityOne";
+
+    // 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
+
+    // TODO: Create variables for each of the TextViews, called
+    // mTvCreate, etc.
+
+    @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);
+
+        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
+            }
+        });
+
+        // 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
+        }
+
+        // TODO: Emit LogCat message
+        // TODO:
+        // Update the appropriate count variable
+        // Update the user interface via the displayCounts() method
+    }
+
+    // Lifecycle callback overrides
+
+    @Override
+    public void onStart() {
+        super.onStart();
+        // TODO: Emit LogCat message
+        // TODO:
+        // Update the appropriate count variable
+        // Update the user interface
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        // TODO: Emit LogCat message
+        // TODO:
+        // Update the appropriate count variable
+        // Update the user interface
+    }
+
+    @Override
+    public void onPause() {
+        super.onPause();
+        // TODO: Emit LogCat message
+    }
+
+    @Override
+    public void onStop() {
+        super.onStop();
+        // TODO: Emit LogCat message
+    }
+
+    @Override
+    public void onRestart() {
+        super.onRestart();
+        // TODO: Emit LogCat message
+        // TODO:
+        // Update the appropriate count variable
+        // Update the user interface
+    }
+
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+        // TODO: Emit LogCat message
+    }
+
+    @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
+    }
+
+    // Updates the displayed counters
+    public void displayCounts() {
+        mTvCreate.setText("onCreate() calls: " + mCreate);
+        mTvStart.setText("onStart() calls: " + mStart);
+        mTvResume.setText("onResume() calls: " + mResume);
+        mTvRestart.setText("onRestart() calls: " + mRestart);
+    }
+}