public class MainActivity extends Activity {ListView list,lv;MyOpenHelper dbHelper;SQLiteDatabase db;String s;Button delbtn,addbtn;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);lv=(ListView)findViewById(R.id.listView1);addbtn=(Button)findViewById(R.id.button1);delbtn=(Button)findViewById(R.id.button2);dbHelper=new MyOpenHelper(MainActivity.this,"personal_contacts.db",null,1);db=dbHelper.getReadableDatabase();///查询数据库Cursor cursor = db.rawQuery("select * from contacts", null);Log.i("sssssssss", "111111");inflateList(cursor);//长按显示详细信息lv.setOnItemLongClickListener(new OnItemLongClickListener() {@Overridepublic boolean onItemLongClick(AdapterView<?> arg0, View view, int arg2,long arg3) {// TODO Auto-generated method stubTextView textView = (TextView)findViewById(R.id.textView1);s=textView.getText().toString();Intent intent = new Intent(MainActivity.this,DetailActivity.class);Bundle bundle=new Bundle();bundle.putString("name", s);intent.putExtras(bundle);startActivity(intent);finish();return false;}});delbtn.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubdb.delete("contacts", "name=?", new String[]{s});Toast.makeText(MainActivity.this, "删除成功", Toast.LENGTH_LONG).show();Cursor cursor=db.rawQuery("select * from contacts", null);inflateList(cursor);}});lv.setOnItemClickListener(new OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> arg0, View view, int arg2,long arg3) {// TODO Auto-generated method stub
                view.setBackgroundColor(Color.BLUE);TextView textView = (TextView)findViewById(R.id.textView1);s=textView.getText().toString();}});addbtn.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubIntent i=new Intent();i.setClass(MainActivity.this, DetailActivity.class);startActivity(i);finish();}});}
private void inflateList(Cursor cursor){Log.i("aaaaa", "111111");int count=cursor.getCount();String[] name=new String[count];String[] mobile=new String[count];int a=0;while(cursor.moveToNext()){name[a]=cursor.getString(cursor.getColumnIndex("name"));mobile[a]=cursor.getString(cursor.getColumnIndex("mobile"));a++;}ArrayList<HashMap<String, Object>> listItem = new ArrayList<HashMap<String,Object>>();
Log.i("sssssssss", "2222222");
for(int i=0;i<count;i++){Log.i("qqqqqqqqq", "111111");HashMap<String,Object> map = new HashMap<String, Object>();map.put("ItemText1", name[i]);map.put("ItemText2", mobile[i]);listItem.add(map);}SimpleAdapter listItemAdater = new SimpleAdapter(MainActivity.this,listItem,R.layout.item,new String[]{"ItemText1","ItemText2"}, new int[]{R.id.textView1,R.id.textView2});Log.i("jjjjjjjjjjjjjjjj", "111111");lv.setAdapter(listItemAdater);Log.i("zzzzzz", "111111");
}@Overridepublic 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;}}