Android Open Source - bugfree-context-demo Main Activity

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License

The source code is released under:

MIT License

Java Source Code

package com.hustbaidu.notebook.activity;
/*w  ww .j  a  va2  s. c  om*/
import java.util.List;

import com.hustbaidu.notebook.R;
import com.hustbaidu.notebook.api.NoteBookInterface;
import com.hustbaidu.notebook.file.NoteFileAPI;
import com.hustbaidu.notebook.model.Note;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.Window;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;

public class MainActivity extends Activity {
  
  public static final String TAG = "MainActivity";
  public static final String DIR = "mydir";
  
  Button addBtn;
  ListView titleLv;
  List<Note> titles;
  TitleAdapter adapter;
  NoteBookInterface mApi;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    this.requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.activity_main);
    mApi = NoteFileAPI.getInstance(this.getApplicationContext());
    findViews();
    titles = mApi.findAll();
    addBtn.setOnClickListener(new AddBtnListener());
    adapter =  new TitleAdapter(this, titles, R.layout.title_item);
    titleLv.setAdapter(adapter);
    titleLv.setOnItemClickListener(new TitleItemListener());
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
  }
  
  void findViews(){
    this.addBtn = (Button) findViewById(R.id.add_note_btn);
    this.titleLv = (ListView) findViewById(R.id.titile_listview);
  }
  
  @Override
  protected void onResume() {
    // TODO Auto-generated method stub
    super.onResume();
    titles = mApi.findAll();
    adapter.setData(titles);
    adapter.notifyDataSetChanged();
  }
  
  class AddBtnListener implements OnClickListener {

    @Override
    public void onClick(View v) {
      // TODO ?????????
      Intent intent = new Intent(MainActivity.this, EditorActivity.class);
      startActivity(intent);
    }
    
  }
  
  class TitleAdapter extends BaseAdapter {
    
    List<Note> data;
    int layoutId;
    Context context;
    LayoutInflater inflater;
    
    public TitleAdapter(Context context, List<Note> data, int layoutId) {
      super();
      this.data = data;
      this.layoutId = layoutId;
      this.context = context;
      this.inflater = (LayoutInflater) context.getSystemService(LAYOUT_INFLATER_SERVICE);
    }
    
    public void setData(List<Note> data) {
      this.data = data;
    }
    
    public List<Note> getData() {
      return data;
    }

    // ????ListView??????????item
    @Override
    public int getCount() {
      // TODO Auto-generated method stub
      return data == null ? 0: data.size();
    }

    
    @Override
    public Object getItem(int position) {
      // TODO Auto-generated method stub
      return data.get(position);
    }

    @Override
    public long getItemId(int position) {
      // TODO Auto-generated method stub
      return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
      // ??convertView?null
      LinearLayout layout;
      ViewHolder holder;
      if(convertView == null) {
        layout = (LinearLayout) inflater.inflate(layoutId, null);
        holder = new ViewHolder();
        holder.name = (TextView) layout.findViewById(R.id.title_item_name);
        holder.date = (TextView) layout.findViewById(R.id.title_item_date);
        layout.setTag(holder);
      } else {
        layout = (LinearLayout) convertView;
        holder = (ViewHolder) layout.getTag();
      }
      
      holder.name.setText(data.get(position).getTitle());
      holder.date.setText(data.get(position).getModifyDate());
      return layout;
    }
    
    class ViewHolder {
      TextView name;
      TextView date;
    }
    
  }
  
  class TitleItemListener implements OnItemClickListener {

    @Override
    public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
        long arg3) {
      Intent intent = new Intent(MainActivity.this, EditorActivity.class);
      String titleString = adapter.data.get(arg2).getTitle();
      intent.putExtra("title", titleString);
      startActivity(intent);
    }
  }

}

Java Source Code List

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