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上传时间: 2014-10-23
详细说明： package com.xyz.gridview; import java.util.HashMap; import java.util.Map; import java.util.Set; import android.app.Activity; import android.content.Context; import android.os.Bundle; import android.view.ActionMode; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.AbsListView.LayoutParams; import android.widget.AbsListView.MultiChoiceModeListener; import android.widget.BaseAdapter; import android.widget.Chec kable; import android.widget.FrameLayout; import android.widget.GridView; import android.widget.ImageView; import android.widget.ListAdapter; import android.widget.TextView; public class HomeActivity extends Activity implements MultiChoiceModeListener { private GridView mGridView; private GridAdapter mGridAdapter; private TextView mActionText; private static final int MENU_SELECT_ALL = 0; private static final int MENU_UNSELECT_ALL = MENU_SELECT_ALL + 1; private Map mSelectMap = new HashMap(); private int[] mImgIds = new int[] { R.drawable.img_1, R.drawable.img_2, R.drawable.img_3, R.drawable.img_4, R.drawable.img_5, R.drawable.img_6, R.drawable.img_7, R.drawable.img_8, R.drawable.img_9, R.drawable.img_1, R.drawable.img_2, R.drawable.img_3, R.drawable.img_4, R.drawable.img_5, R.drawable.img_6, R.drawable.img_7 }; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mGridView = (GridView) findViewById(R.id.gridview); mGridView.setChoiceMode(GridView.CHOICE_MODE_MULTIPLE_MODAL); mGridAdapter = new GridAdapter(this); mGridView.setAdapter(mGridAdapter); mGridView.setMultiChoiceModeListener(this); } /** Override MultiChoiceModeListener start **/ @Override public boolean onCreateActionMode(ActionMode mode, Menu menu) { // TODO Auto-generated method stub View v = LayoutInflater.from(this).inflate(R.layout.actionbar_layout, null); mActionText = (TextView) v.findViewById(R.id.action_text); mActionText.setText(formatString(mGridView.getCheckedItemCount())); mode.setCustomView(v); getMenuInflater().inflate(R.menu.action_menu, menu); return true; } @Override public boolean onPrepareActionMode(ActionMode mode, Menu menu) { // TODO Auto-generated method stub menu.getItem(MENU_SELECT_ALL).setEnabled( mGridView.getCheckedItemCount() != mGridView.getCount()); return true; } @Override public boolean onActionItemClicked(ActionMode mode, MenuItem item) { // TODO Auto-generated method stub switch (item.getItemId()) { case R.id.menu_select: for (int i = 0; i < mGridView.getCount(); i++) { mGridView.setItemChecked(i, true); mSelectMap.put(i, true); } break; case R.id.menu_unselect: for (int i = 0; i < mGridView.getCount(); i++) { mGridView.setItemChecked(i, false); mSelectMap.clear(); } break; } return true; } @Override public void onDestroyActionMode(ActionMode mode) { // TODO Auto-generated method stub mGridAdapter.notifyDataSetChanged(); } @Override public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) { // TODO Auto-generated method stub mActionText.setText(formatString(mGridView.getCheckedItemCount())); mSelectMap.put(position, checked); mode.invalidate(); } /** Override MultiChoiceModeListener end **/ private String formatString(int count) { return String.format(getString(R.string.selection), count); } private class GridAdapter extends BaseAdapter { private Context mContext; public GridAdapter(Context ctx) { mContext = ctx; } @Override public int getCount() { // TODO Auto-generated method stub return mImgIds.length; } @Override public Integer getItem(int position) { // TODO Auto-generated method stub return Integer.valueOf(mImgIds[position]); } @Override public long getItemId(int position) { // TODO Auto-generated method stub return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub GridItem item; if (convertView == null) { item = new GridItem(mContext); item.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT)); } else { item = (GridItem) convertView; } item.setImgResId(getItem(position)); item.setChecked(mSelectMap.get(position) == null ? false : mSelectMap.get(position)); return item; } } } ...展开收缩
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