import java.io.Serializable; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map;
import android.os.Bundle; import android.app.Activity; import android.app.AlertDialog; import android.app.AlertDialog.Builder; import android.app.Dialog; import android.content.DialogInterface; import android.content.Intent; import android.graphics.Color; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.Button; import android.widget.GridView; import android.widget.SimpleAdapter; import android.widget.TextView; import android.widget.Toast;
public class MainActivity extends Activity {
private Button button_add; private GridView gv; List<Map<String, String>> list = new ArrayList<Map<String, String>>();
@Override protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 1 && resultCode == 1) { // 获取map集合 final HashMap<String, String> map = (HashMap<String, String>) data .getSerializableExtra("map");
// 将map集合添加到list集合中 list.add(map);
// 为gridview设置适配器 final SimpleAdapter adapter = new SimpleAdapter(MainActivity.this, list, R.layout.item, new String[] { "name", "author" }, new int[] { R.id.item_name, R.id.item_author }); gv.setAdapter(adapter);
// 为gv设置条目点击监听事件 gv.setOnItemClickListener(new OnItemClickListener() {
@Override public void onItemClick(AdapterView<?> parent, View view, final int position, long id) {
gv.setSelector(android.R.color.holo_red_light);
new AlertDialog.Builder(MainActivity.this) .setTitle("确认删除") .setMessage("确认删除吗?") .setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override public void onClick( DialogInterface dialog, int which) { Toast.makeText(MainActivity.this, "您放弃了删除", 0).show();
} }).setPositiveButton("确认", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Toast.makeText(MainActivity.this, "删除成功", 0).show(); list.remove(position); adapter.notifyDataSetChanged(); } }).show();
} });
}
}
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main);
// 寻找控件 findView();
// 为添加按钮设置点击监听事件 setClick(); }
private void setClick() {
button_add.setOnClickListener(new OnClickListener() {
@Override public void onClick(View v) {
// 回调跳转到添加界面 Intent intent = new Intent(MainActivity.this, AddActivity.class); startActivityForResult(intent, 1);
} });
}
private void findView() {
button_add = (Button) findViewById(R.id.button_add); gv = (GridView) findViewById(R.id.gv); TextView tv = (TextView) findViewById(R.id.tv_manager);
}
}
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