Android Open Source - android_tutorial_projects Main Activity

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License

The source code is released under:

Copyright (c) 2013, Uthcode All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redi...

Java Source Code

package com.uthcode.testdatabaseactivity;
/*from   w w w  .ja  v  a2 s  .c o  m*/
import android.app.ListActivity;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.os.Build;
import android.widget.ArrayAdapter;

import java.sql.SQLException;
import java.util.List;
import java.util.Random;

public class MainActivity extends ListActivity{
    private CommentsDataSource datasource;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        datasource = new CommentsDataSource(this);
        try {
            datasource.open();
        } catch (SQLException e) {
            e.printStackTrace();
        }

        List<Comment> values = datasource.getAllComments();

        ArrayAdapter<Comment> adapter = new ArrayAdapter<Comment>(this, android.R.layout.simple_list_item_1, values);
        setListAdapter(adapter);

    }

    public void onClick(View view) {
        ArrayAdapter<Comment> adapter = (ArrayAdapter<Comment>) getListAdapter();
        Comment comment = null;
        switch(view.getId()) {
            case R.id.add:
                String[] comments = new String[] {"Cool", "very nice ", "Hate it"};
                int nextInt = new Random().nextInt(3);
                comment = datasource.createComment(comments[nextInt]);
                adapter.add(comment);
                break;
            case R.id.delete:
                if (getListAdapter().getCount() > 0 ) {
                    comment = (Comment) getListAdapter().getItem(0);
                    datasource.deleteComment(comment);
                    adapter.remove(comment);
                }
                break;
        }
        adapter.notifyDataSetChanged();
    }

    @Override
    protected void onPause() {
        datasource.close();
        super.onPause();
    }

    @Override
    protected void onResume() {
        try {
            datasource.open();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        super.onResume();
    }
}

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