Question

初学者在Android应用程序上工作，当我在主活动中按下按钮后调用onSearchRequested方法时，我正在尝试启动可搜索的活动。目前，按下按钮时，没有任何反应。

这是MainActivity.Java：

package com.example.activity2;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;



public class MainActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button button1 = (Button) findViewById(R.id.button1);
        button1.setOnClickListener(new View.OnClickListener() 
        {

            @Override
            public void onClick(View v)
            {
                onSearchRequested();
            }
        });

        }

    /** Called when the user clicks the Send button */
  //  public void sendMessage(View view)
   // {    

  //  }





    @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);
    }
}

这是清单：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.activity2"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-permission
         android:name="android.permission.INTERNET"></uses-permission>

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="19" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.SEARCH" />
                <action android:name="android.intent.action.MAIN" />
                <action android:name="android.intent.action.FLAG_ACTIVITY_NEW_TASK" />
                <meta-data
                android:name="android.app.default_searchable"
                android:value="com.example.activity2.SearchActivity" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.authorwjf.youtubeapi.MainActivity"
            android:label="@string/title_activity_activity2" >
        </activity>
        <activity android:name=".SearchActivity" >
            android:launchMode="singleTop" >
            <intent-filter>
                <action android:name="com.example.activity2.SEARCHACTIVITY" />

                <category android:name="android.intent.category.DEFAULT"  />
            </intent-filter>

        </activity>
        <activity
            android:name=".OtherActivity"
            android:label="@string/title_activity_other" >

            <!-- enable the search dialog to send searches to SearchableActivity -->
            <meta-data
                android:name="android.app.default_searchable"
                android:value=".SearchActivity" />
        </activity>
        <activity
            android:name=".SearchListView"
            android:label="@string/title_activity_search_list_view" >
        </activity>
        <activity
            android:name=".SearchYoutube"
            android:label="@string/title_activity_search_youtube" >
        </activity>
        <meta-data
                android:name="android.app.searchable"
                android:resource="@xml/searchable" />
    </application>

</manifest>

SearchActivity.Java

package com.example.activity2;


import java.util.ArrayList;
import java.util.Iterator;

import android.app.Activity;
import android.app.SearchManager;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import com.google.api.services.youtube.model.SearchResult;

public class SearchActivity extends Activity {
    ListView lst;

    @Override
    protected void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_search_activity);
        Intent intent = getIntent();
        if (Intent.ACTION_SEARCH.equals(intent.getAction())) {
          String query = intent.getStringExtra(SearchManager.QUERY);
          ArrayList<SearchResult> results = new ArrayList<SearchResult>();
          Iterator<SearchResult> it = results.iterator();
          SearchYoutube.prettyPrint(it, query);
          lst = (ListView) findViewById(R.id.list);
          ArrayAdapter<String> adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, SearchYoutube.ytstuff);
          lst.setAdapter(adapter);
    }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.search, 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);
    }
}

Answer 1

在searchable.xml文件夹的xml文件中，标签无法进行硬编码。它应该像@string/name或搜索对话框不会显示。

Answer 2

您需要实施搜索活动。

public class SearchableActivity extends ListActivity {

    public void onCreate(Bundle savedInstanceState) { 
          super.onCreate(savedInstanceState); 
          Log.d("SEARCH", "HERE");
          handleIntent(getIntent()); 
       } 

       public void onNewIntent(Intent intent) { 
          setIntent(intent); 
          handleIntent(intent); 
       } 

       public void onListItemClick(ListView l, View v, int position, long id) { 
          // call the appropriate detail activity
       } 

       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) { 
           Toast.makeText(getApplicationContext(), queryStr, Toast.LENGTH_LONG).show();
       } 
}

并在AndroidManifest.xml中指定元数据

<meta-data
    android:name="android.app.default_searchable"
    android:value=".SearchableActivity" />

<activity
    android:name=".SearchableActivity"
    android:label="@string/app_name"
    android:launchMode="singleTop" >
    <intent-filter>
        <action android:name="android.intent.action.SEARCH" />
    </intent-filter>

    <meta-data
        android:name="android.app.searchable"
        android:resource="@xml/searchable" />
</activity>

调用onSearchRequested时未激活搜索对话（Android）

2 个答案: