android中的搜索对话框未显示
我正在开发一个我希望实现搜索对话框的Android应用程序。 尽管遵循了http://developer.android.com/guide/topics/search/search-dialog.html
中的所有步骤单击搜索图标时，不会显示搜索对话框。代码如下：
Android清单
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.a1405232.rateit2">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".HomePage"
android:label="@string/title_activity_home_page"
android:theme="@style/AppTheme.NoActionBar"></activity>
<activity android:name=".SearchableActivity" >
<intent-filter>
<action android:name="android.intent.action.SEARCH" />
</intent-filter>
<meta-data android:name="android.app.searchable"
android:resource="@xml/searchable"/>
</activity>
<meta-data android:name="android.app.searchable"
android:resource="@xml/searchable"/>
</application>
HomePage.java
package com.example.a1405232.rateit2;
import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.NavigationView;
import android.support.design.widget.Snackbar;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
public class HomePage extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
Intent i1 = getIntent();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home_page);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.home_page, 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();
//noinspection SimplifiableIfStatement
switch(id)
{
case R.id.action_settings:
return true;
case R.id.action_search:
onSearchRequested();
// Toast.makeText(this, "This is my Toast message!",
// Toast.LENGTH_SHORT).show();
return true;
default:
// If we got here, the user's action was not recognized.
// Invoke the superclass to handle it.
return super.onOptionsItemSelected(item);
}
}
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
// Handle the camera action
} else if (id == R.id.nav_gallery) {
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
SearchableActivity.java
package com.example.a1405232.rateit2;
import android.app.ListActivity;
import android.app.SearchManager;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ListView;
public class SearchableActivity extends ListActivity{
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
handleIntent(getIntent());
}
public void onNewIntent(Intent intent) {
setIntent(intent);
handleIntent(intent);
}
public void onListItemClick(ListView l,View v, int position, long id) {
// call detail activity for clicked entry
}
private void handleIntent(Intent intent) {
if (Intent.ACTION_SEARCH.equals(intent.getAction())) {
String query =intent.getStringExtra(SearchManager.QUERY);
doSearch(query);
}
}
private void doSearch(String queryStr) {
// get a Cursor, prepare the ListAdapter and set it
}
}
res / xml中有一个可搜索的文件
<?xml version="1.0" encoding="utf-8"?>
<searchable xmlns:android="http://schemas.android.com/apk/res/android"
android:label="@string/app_name"
android:hint="@string/search_hint" >
</searchable>
我错过了什么？ 我还没有实现查询。只想要SearchableActivity 打开，以便我可以看到搜索对话框。
我看到了这个答案并添加了一个外部元标记，但没有回复Search in Android
这是屏幕的外观。单击搜索图标时不会显示搜索框。
1 个答案:
答案 0 :(得分：2)
以下是工作搜索对话框示例的基本代码。
首先，您必须在List postDTOs = entityManager.createNativeQuery(
"select " +
" p.id as \"id\", " +
" p.title as \"title\" " +
"from Post p " +
"where p.created_on > :fromTimestamp")
.setParameter( "fromTimestamp", Timestamp.from(
LocalDateTime.of( 2016, 1, 1, 0, 0, 0 ).toInstant( ZoneOffset.UTC ) ))
.unwrap( org.hibernate.query.NativeQuery.class )
.setResultTransformer( Transformers.aliasToBean( PostDTO.class ) )
.getResultList();
资源文件夹中定义searchable.xml文件：
xml请注意，因为<?xml version="1.0" encoding="utf-8"?>
<searchable xmlns:android="http://schemas.android.com/apk/res/android"
android:label="@string/app_name"
android:hint="@string/search_hint" >
</searchable>
和label值强制，它们指向字符串资源，这是一个应该在android文档中更加突出显示的点，仍然是这么多问题的根源。
其次，你必须改变一下你的hint，为了简单起见，假设你只有一个活动AndroidManifest.xml，你最后的清单应该是这样的：
MainActivity最后一步是更改<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.paolomoschini.searchdialogtest">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:name=".MainActivity"
android:label="@string/app_name"
android:theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
<!-- this is the searchable activity; it performs searches.
Notice that this provides the search dialog by default -->
<intent-filter>
<action android:name="android.intent.action.SEARCH" />
</intent-filter>
<meta-data android:name="android.app.searchable"
android:resource="@xml/searchable"/>
</activity>
</application>
</manifest>
以显示搜索对话框并接收搜索查询。
假设您有一个声明了以下项目的菜单项：
MainActivity.class当用户按下搜索图标
时，<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
xmlns:appcompat="http://schemas.android.com/apk/res-auto"
tools:context="com.paolomoschini.searchdialogtest.MainActivity">
<item
android:id="@+id/action_search"
android:icon="@drawable/ic_search"
android:title="Search"
appcompat:showAsAction="always"/>
<item
android:id="@+id/action_settings"
android:orderInCategory="100"
android:title="@string/action_settings"
app:showAsAction="never"/>
</menu>
会触发以下内容
MainActivity.class @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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
if (id == R.id.action_search) {
//this is the method that displays the search dialog
onSearchRequested();
}
return super.onOptionsItemSelected(item);
}
通过意图接收搜索文本，在MainActivity.class方法中添加以下内容：
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