Android Open Source - Assignment1 Counter Screen

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.example.kwicento_count;
//from w  w  w .ja va 2s  .c om
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.support.v4.app.NavUtils;
import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.content.Intent;
import android.os.Build;

public class CounterScreen extends Activity {
  
  protected Counter currObj; 
  //represents the object that will be represented by this screen at this time 

  
  @SuppressLint("NewApi")
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.actual_counting_screen);
    // Show the Up button in the action bar.
    setupActionBar();
    //Get the name of the counter, and set the name of the button to it
    currObj = new Counter();
    Button text = (Button) findViewById(R.id.button1);
    String name = currObj.getName();
    text.setText(name);
  }

  public void setCurrObj(Counter currObj) {
    this.currObj = currObj;
  }

  /**
   * Set up the {@link android.app.ActionBar}, if the API is available.
   */
  @TargetApi(Build.VERSION_CODES.HONEYCOMB)
  private void setupActionBar() {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
      getActionBar().setDisplayHomeAsUpEnabled(true);
    }
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.counter_screen, menu);
    return true;
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    case android.R.id.home:
      // This ID represents the Home or Up button. In the case of this
      // activity, the Up button is shown. Use NavUtils to allow users
      // to navigate up one level in the application structure. For
      // more details, see the Navigation pattern on Android Design:
      //
      // http://developer.android.com/design/patterns/navigation.html#up-vs-back
      //
      NavUtils.navigateUpFromSameTask(this);
      return true;
    }
    return super.onOptionsItemSelected(item);
  }
  
  //when the main button is pressed, will increment the count of the counter object
  // and update what is displayed on the screen
  public void increment(View view) {
    int num = currObj.getCount();
    num++;
    currObj.setCount(num);
    TextView text = (TextView) findViewById(R.id.counting);
    text.setText("Count: "+num);
  }

  //Updates the counter's count to 0 and changes the count 
  //displayed on screen
  public void reset(View view)
  {
    currObj.setCount(0);
    TextView text = (TextView) findViewById(R.id.counting);
    text.setText("Count: 0");
  }
  
  //Method first gets the array of counters from the home screen, and then 
  //calls the method in CounterListModel that deletes the current counter
  //from its array. then it returns to the list screen
  public void deleteCounter(View view)
  {
    CounterListModel mod = HomeScreen.getNewModel();
    mod.deleteCounter(currObj);
    finish();
  }
  public void editCounter(View view) {
    Intent intent = new Intent(this, EditingCounterScreen.class);
    startActivity(intent);  
  }
  
}

Java Source Code List

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