添加功能图标在首页显示-创新互联

添加功能图标在首页显示

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主类：

public class MainActivity extends AppCompatActivity

{

private List<MyData> mList =new ArrayList<MyData>();

private SharedPreferences sp;

private MyAdapter myAdapter;

@Override

protected void onCreate ( Bundle savedInstanceState )

{

super.onCreate ( savedInstanceState );

setContentView ( R.layout.activity_main );

initListView ( );

initData();

}

//上下文菜单

@Override

public void onCreateContextMenu ( ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo )

{

menu.add ( "删除" );

}

@Override

public boolean onContextItemSelected ( MenuItem item )

{

AdapterView.AdapterContextMenuInfo menuInfo = ( AdapterView.AdapterContextMenuInfo ) item.getMenuInfo ( );

int position = menuInfo.position;

MyData myData = mList.get ( position );

String name = myData.getName ( );

mList.remove ( position );

SharedPreferences.Editor edit = sp.edit ( );

edit.putInt ( name, 0);

edit.commit ();

myAdapter.notifyDataSetChanged ();

return true;

}

private void initData ( )

{

sp = getSharedPreferences("data",0);

mList.clear ();

for (int i=0;i<Constant.TT.length;i++)

{

int anInt = sp.getInt ("0"+i,0 );

if(anInt!=0)

{

mList.add ( new MyData ("0"+i,anInt ) );

}

myAdapter.notifyDataSetChanged ();

}

private void initListView ( )

{

ListView mListView = ( ListView ) findViewById ( R.id.lv );

myAdapter = new MyAdapter();

mListView.setAdapter ( myAdapter );

registerForContextMenu (mListView);

}

class MyAdapter extends BaseAdapter

{

@Override

public int getCount ( )

{

return mList.size ();

}

@Override

public Object getItem ( int position )

{

return null;

}

@Override

public long getItemId ( int position )

{

return 0;

}

@SuppressLint ( "ViewHolder" )

@Override

public View getView ( int position, View convertView, ViewGroup parent )

{

View layout = getLayoutInflater ( ).inflate ( R.layout.mainlistview, null );

ImageView img = ( ImageView ) layout.findViewById ( R.id.mlv_img );

TextView tv = ( TextView ) layout.findViewById ( R.id.mlv_tv );

if(mList.size ()>position)

{

MyData mydata = mList.get ( position );

int imgId=mydata.getImgId ();

if ( imgId!= 0)

{

img.setVisibility ( View.VISIBLE );

tv.setVisibility ( View.VISIBLE );

img.setImageResource ( imgId );

tv.setText ( mydata.getName () );

}else

{

img.setVisibility ( View.GONE );

tv.setVisibility ( View.GONE );

}

return layout;

}

@Override

protected void onActivityResult ( int requestCode, int resultCode, Intent data )

{

initData();

super.onActivityResult ( requestCode, resultCode, data );

}

public void btnClick ( View v )

{

Intent intent = new Intent ( this, SecondActivity.class );

startActivityForResult ( intent, Constant.requestCode );

}

接口：

interface Constant

{

public final static int requestCode=01;

public final static int[] TT={R.drawable.w1,R.drawable.w2,R.drawable.w3,

R.drawable.w4,R.drawable.w5, R.drawable.w6,

R.drawable.w7,R.drawable.w8,R.drawable.w9,

R.drawable.w10, R.drawable.w11};

public final static String[] SS={"01","02","03","04","05","06","07","08","09","10","11"};

}

添加功能界面类：

public class SecondActivity extends AppCompatActivity

{

private SharedPreferences sp;

@Override

protected void onCreate(Bundle savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_second);

initGridView();

}

//找GridView控件

private void initGridView ( )

{

sp = getSharedPreferences ( "data", 0 );

GridView gv = ( GridView ) findViewById ( R.id.second_gv );

MyGridAdapter myGridAdapter = new MyGridAdapter();

gv.setAdapter ( myGridAdapter );

}

class MyGridAdapter extends BaseAdapter

{

@Override

public int getCount ( )

{

return Constant.TT.length;

}

@Override

public Object getItem ( int position )

{

return null;

}

@Override

public long getItemId ( int position )

{

return 0;

}

@SuppressLint ( "ViewHolder" )

@Override

public View getView ( final int position, View convertView, ViewGroup parent )

{

View layout = getLayoutInflater ().inflate ( R.layout.secondgridview,null );

ImageView img = ( ImageView ) layout.findViewById ( R.id.sgv_img );

CheckBox cb = ( CheckBox ) layout.findViewById ( R.id.sgv_cb );

img.setImageResource ( Constant.TT[position] );

final int p=position;

cb.setOnClickListener ( new View.OnClickListener ( )

{

@Override

public void onClick ( View v )

{

SharedPreferences.Editor edit = sp.edit ( );

edit.putInt ( "0"+p ,Constant.TT[p]);

edit.commit ();

}

} );

return layout;

}

//返回首页页面

public void btnBack(View v)

{

Intent intent = new Intent ( );

setResult ( Constant.requestCode,intent );

finish ();

}

数据保存对象类：

public class MyData

{

private String name;

private int imgId;

public MyData ( String name , int imgId )

{

this.name = name;

this.imgId = imgId;

}

public String getName ( )

{

return name;

}

public int getImgId ( )

{

return imgId;

}

public void setName ( String name )

{

this.name = name;

}

public void setImgId ( int imgId )

{

this.imgId = imgId;

}

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