我有两个问题。首先是当我点击我设置的选项时没有任何反应，在这种情况下，它是添加项目的选项，将用户带到另一个活动，但是当我点击它时没有任何反应。我创建了一个调用相同活动的按钮，它正在工作。同样在listView中选择项目是不行的，应该有一个弹出窗口从listView和数据库中删除项目，但是没有。我会在这里找到一些帮助，如果有人可以建议我如何在listView中创建多个选项并计算检查了多少项this
所以这是我的MainActivity：
public class MainActivity extends BaseActivity {
// Declare variables
private static final int ACTIVITY_CREATE=0;
private static final int ACTIVITY_EDIT=1;
private static final int INSERT_ID = Menu.FIRST;
private static final int DELETE_ID = Menu.FIRST + 1;
private GroceryDbAdapter mDbHelper;
Button addItem;
private Toolbar toolbar;
private ListView listView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FrameLayout frameLayout = (FrameLayout)findViewById(R.id.frame_container);
// inflate the custom activity layout
LayoutInflater layoutInflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View activityView = layoutInflater.inflate(R.layout.activity_main, null,false);
frameLayout.addView(activityView);
// Setting toolbar
toolbar = (Toolbar) findViewById(R.id.app_bar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setLogo(R.drawable.shopping_cart_logo);
// Setting database and adapter
mDbHelper = new GroceryDbAdapter(this);
mDbHelper.open();
// Locate ListView
listView = (ListView) findViewById(R.id.list);
// Locate button and initialization
addItem = (Button) findViewById(R.id.add_item);
addItem.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, AddActivity.class);
startActivity(intent);
overridePendingTransition(R.anim.slide_in, R.anim.slide_out);
}
});
fillData();
}
@SuppressWarnings("deprecation")
private void fillData() {
Cursor itemsCursor = mDbHelper.fetchAllItems();
startManagingCursor(itemsCursor);
// Create an array to specify the fields we want to display in the list (only TITLE)
String[] from = new String[]{GroceryDbAdapter.KEY_TITLE, GroceryDbAdapter.KEY_PRICE};
// and an array of the fields we want to bind those fields to (in this case just title)
int[] to = new int[]{R.id.title, R.id.price};
// Now create a simple cursor adapter and set it to display
SimpleCursorAdapter items =
new SimpleCursorAdapter(this, R.layout.list_item_row, itemsCursor, from, to);
listView.setAdapter(items);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
menu.add(0, INSERT_ID, 0, "Add Item");
return true;
}
public boolean onOptionsItemSelected(int featureId, MenuItem item) {
switch(item.getItemId()) {
case INSERT_ID:
createItem();
return true;
}
return super.onMenuItemSelected(featureId, item);
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
menu.add(0, DELETE_ID, 0, "Delete Item");
}
@Override
public boolean onContextItemSelected(MenuItem item) {
switch(item.getItemId()) {
case DELETE_ID:
AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
mDbHelper.deleteItem(info.id);
fillData();
return true;
}
return super.onContextItemSelected(item);
}
private void createItem() {
Intent i = new Intent(this, AddActivity.class);
startActivityForResult(i, ACTIVITY_CREATE);
}
public void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
Intent i = new Intent(this, AddActivity.class);
i.putExtra(GroceryDbAdapter.KEY_ROWID, id);
startActivityForResult(i, ACTIVITY_EDIT);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);
fillData();
}
}
这是我的AddActivity.java，当用户从菜单（不工作）和按钮（工作正常）点击addItem时应该调用它：
public class AddActivity extends BaseActivity {
private Long mRowId;
private GroceryDbAdapter mDbHelper;
private EditText title_edit;
private EditText price_edit;
private Button saveButton;
private Toolbar toolbar;
@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
mDbHelper = new GroceryDbAdapter(this);
mDbHelper.open();
setContentView(R.layout.add_activity_layout);
mDrawerToggle.setDrawerIndicatorEnabled(false);
toolbar = (Toolbar) findViewById(R.id.app_bar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
toolbar.setNavigationIcon(R.drawable.ic_action_back);
getSupportActionBar().setLogo(R.drawable.shopping_cart_logo);
// Locate the EditText in add_activity_layout.xml
title_edit = (EditText) findViewById(R.id.titleEdit);
price_edit = (EditText) findViewById(R.id.priceEdit);
mRowId = (savedInstanceState == null) ? null :
(Long) savedInstanceState.getSerializable(GroceryDbAdapter.KEY_ROWID);
if (mRowId == null) {
Bundle extras = getIntent().getExtras();
mRowId = extras != null ? extras.getLong(GroceryDbAdapter.KEY_ROWID)
: null;
}
populateFields();
saveButton = (Button) findViewById(R.id.save);
saveButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
setResult(RESULT_OK);
finish();
overridePendingTransition(R.anim.slide_in_back, R.anim.slide_out_back);
}
});
}
private void populateFields() {
if (mRowId != null) {
Cursor item = mDbHelper.fetchItem(mRowId);
startManagingCursor(item);
title_edit.setText(item.getString(
item.getColumnIndexOrThrow(GroceryDbAdapter.KEY_TITLE)));
price_edit.setText(item.getString(
item.getColumnIndexOrThrow(GroceryDbAdapter.KEY_PRICE)));
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
saveState();
outState.putSerializable(GroceryDbAdapter.KEY_ROWID, mRowId);
}
@Override
protected void onPause() {
super.onPause();
saveState();
}
@Override
protected void onResume() {
super.onResume();
populateFields();
}
private void saveState() {
String title = title_edit.getText().toString();
String price = price_edit.getText().toString();
if (mRowId == null) {
long id = mDbHelper.createItem(title, price);
if (id > 0) {
mRowId = id;
}
} else {
mDbHelper.updateItem(mRowId, title, price);
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.home) {
NavUtils.navigateUpFromSameTask(this);
}
return super.onOptionsItemSelected(item);
}
}
以下是我的MainActivity布局：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/mainContent"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<include
android:id="@+id/app_bar"
layout="@layout/app_bar" />
<Button
android:id="@+id/add_item"
style="@style/MyCustomButton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:text="@string/add_button" />
<ListView
android:id="@+id/list"
android:choiceMode="multipleChoice"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_above="@+id/add_item"
android:layout_below="@+id/relativeLayout"
android:layout_centerHorizontal="true"
android:layout_margin="@dimen/margin"
android:divider="@color/list_divider_row"
android:dividerHeight="@dimen/divider_height"
android:listSelector="@drawable/list_row_selector" >
</ListView>
<RelativeLayout
android:id="@+id/relativeLayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/listView1"
android:layout_alignStart="@+id/listView1"
android:layout_alignRight="@+id/listView1"
android:layout_alignEnd="@+id/listView1"
android:layout_below="@+id/app_bar"
android:padding="@dimen/relative_layout_padding" >
<TextView
android:id="@+id/item_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="10dp"
android:layout_marginTop="4dp"
android:text="Items"
android:textColor="#474747"
android:textSize="16sp" />
<TextView
android:id="@+id/item_count"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginLeft="5dp"
android:layout_marginTop="4dp"
android:layout_toRightOf="@+id/item_text"
android:text="(2)"
android:textColor="#474747"
android:textSize="14sp" />
<TextView
android:id="@+id/total_amount"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:text="Rs. 5700"
android:textColor="#000000"
android:textSize="20dp" />
</RelativeLayout>
</RelativeLayout>
修改
我的BaseActivity代码：
package com.dusandimitrijevic.grocerylist;
import java.util.ArrayList;
import com.dusandimitrijevic.adapters.NavDrawerListAdapter;
import android.content.Intent;
import android.content.res.Configuration;
import android.content.res.TypedArray;
import android.os.Bundle;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
public abstract class BaseActivity extends AppCompatActivity {
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
public ActionBarDrawerToggle mDrawerToggle;
// nav drawer title
private CharSequence mDrawerTitle;
// used to store app title
private CharSequence mTitle;
// slide menu items
private String[] navMenuTitles;
private TypedArray navMenuIcons;
private ArrayList<NavDrawerItem> navDrawerItems;
private NavDrawerListAdapter adapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_drawer_layout);
mTitle = mDrawerTitle = getTitle();
// load slide menu items
navMenuTitles = getResources().getStringArray(R.array.nav_drawer_items);
// nav drawer icons from resources
navMenuIcons = getResources()
.obtainTypedArray(R.array.nav_drawer_icons);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.list_slidermenu);
navDrawerItems = new ArrayList<NavDrawerItem>();
// adding nav drawer items to array
// Home
navDrawerItems.add(new NavDrawerItem(navMenuTitles[0], navMenuIcons.getResourceId(0, -1)));
// Shop
navDrawerItems.add(new NavDrawerItem(navMenuTitles[1], navMenuIcons.getResourceId(1, -1)));
// Calendar
navDrawerItems.add(new NavDrawerItem(navMenuTitles[2], navMenuIcons.getResourceId(2, -1)));
// Settings
navDrawerItems.add(new NavDrawerItem(navMenuTitles[3], navMenuIcons.getResourceId(3, -1)));
// About
navDrawerItems.add(new NavDrawerItem(navMenuTitles[4], navMenuIcons.getResourceId(4, -1)));
// Recycle the typed array
navMenuIcons.recycle();
mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
// setting the nav drawer list adapter
adapter = new NavDrawerListAdapter(getApplicationContext(),
navDrawerItems);
mDrawerList.setAdapter(adapter);
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
R.drawable.ic_drawer, //nav menu toggle icon
R.string.app_name
){
public void onDrawerClosed(View view) {
getSupportActionBar().setTitle(mTitle);
// calling onPrepareOptionsMenu() to show action bar icons
invalidateOptionsMenu();
}
public void onDrawerOpened(View drawerView) {
getSupportActionBar().setTitle(mDrawerTitle);
// calling onPrepareOptionsMenu() to hide action bar icons
invalidateOptionsMenu();
}
};
}
private class DrawerItemClickListener implements ListView.OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
switch (position) {
case 0: {
Intent intent = new Intent(BaseActivity.this, MainActivity.class);
startActivity(intent);
break;
}
case 1: {
Intent intent = new Intent(BaseActivity.this, MainActivity.class);
startActivity(intent);
break;
}
case 2: {
Intent intent = new Intent(BaseActivity.this, MainActivity.class);
startActivity(intent);
break;
}
case 3: {
Intent intent = new Intent(BaseActivity.this, MainActivity.class);
startActivity(intent);
break;
}
case 4: {
Intent intent = new Intent(BaseActivity.this, MainActivity.class);
startActivity(intent);
break;
}
default:
break;
}
mDrawerLayout.closeDrawer(mDrawerList);
}
}
@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;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/***
* Called when invalidateOptionsMenu() is triggered
*/
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
// if nav drawer is opened, hide the action items
boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
menu.findItem(R.id.action_settings).setVisible(!drawerOpen);
return super.onPrepareOptionsMenu(menu);
}
@Override
public void setTitle(CharSequence title) {
mTitle = title;
getActionBar().setTitle(mTitle);
}
/**
* When using the ActionBarDrawerToggle, you must call it during
* onPostCreate() and onConfigurationChanged()...
*/
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
mDrawerToggle.syncState();
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Pass any configuration change to the drawer toggls
mDrawerToggle.onConfigurationChanged(newConfig);
}
@Override
public void onBackPressed() {
// TODO Auto-generated method stub
super.onBackPressed();
overridePendingTransition(R.anim.slide_in_back, R.anim.slide_out_back);
}
public void onListItemClick(ListView l, View v, int position, long id) {
// TODO Auto-generated method stub
}
}
答案 0 :(得分：0)
而不是addItem.setOnClickListener，请使用listView.setOnItemClickListener
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent intent = new Intent(MainActivity.this, AddActivity.class);
startActivity(intent);
overridePendingTransition(R.anim.slide_in, R.anim.slide_out);
}
});
对于菜单项，请单击
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int itemId = item.getItemId();
if (itemId == DELETE_ID) {
AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
mDbHelper.deleteItem(info.id);
fillData();
}
return true;
}