android应用程序搜索操作栏没有得到结果

Question

我正在为我的网站做一个应用程序。我正在开展一项活动，即MainActivity。我不是刚刚学习的Android开发人员。问题是，我已经搜索了主要活动的操作栏。 searchview即将到来，我可以在其中输入文字。但是当我按下提交时，没有任何反应。我需要的结果是在同一个活动中。主要活动。搜索查询将加载网页搜索。我的菜单是R.menu.main，用于搜索的菜单项是R.id.action_search 请告诉我我做错了什么。这里是我的AndroidManifest.xml

代码

<uses-permission android:name="android.permission.INTERNET" /> 
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> 
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> 
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 
<uses-permission android:name="android.permission.MEDIA_CONTENT_CONTROL"/> 
<uses-permission android:name="android.permission.CAMERA"/> 
android:hardwareAccelerated="true" 
<application android:allowBackup="true" 
    android:icon="@mipmap/ic_launcher" 
    android:label="Bengalflora.in" 
    android:supportsRtl="true" 
    android:theme="@style/AppTheme" > 
    <activity 
     android:name=".MainActivity" 
     android:label="Bengalflora.in" 
     android:theme="@style/AppTheme.NoActionBar" 
     android:launchMode="singleTop" 
     > 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN" /> 

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

     <meta-data android:name="android.app.default_searchable" 
      android:value="com.mywebsite.mywebsite.MainActivity" 
      android:resource="@xml/searchable" /> 
     <meta-data 
      android:name="android.app.searchable" 
      android:value="com.mywebsite.mywebsite.MainActivity" 
      android:resource="@xml/searchable" /> 
    </activity> 
    <activity android:name=".Splash"> 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN"/> 
      <category android:name="android.intent.category.LAUNCHER"/> 
     </intent-filter> 
    </activity> 
    <activity 
     android:name=".Aboutus" 
     android:label="About us" 
     android:parentActivityName=".MainActivity" > 

     <!-- Parent activity meta-data to support 4.0 and lower --> 
     <meta-data 
      android:name="android.support.PARENT_ACTIVITY" 
      android:value=".MainActivity" /> 
    </activity> 
</application> 

这是我的主要活动

public class MainActivity extends AppCompatActivity 
     implements NavigationView.OnNavigationItemSelectedListener{ 
    private static final int REQUEST_INTERNET = 200; 
    private static final int TIME_INTERVAL = 1000; // # milliseconds, desired time passed between two back presses. 
    private long mBackPressed; 
    private ProgressBar mProgressBar; 

    private static final String target_url="https://bengalflora.in"; 
    private static final String target_url_prefix="bengalflora.in"; 
    private Context mContext; 
    private WebView mWebviewPop; 
    private FrameLayout mContainer; 
    WebView mwebView; 

    String mypage_error = "file:///android_asset/error/index.html"; 

    private static final String TAG = MainActivity.class.getSimpleName(); 
    private String mCM; 
    private ValueCallback<Uri> mUM; 
    private ValueCallback<Uri[]> mUMA; 
    private final static int FCR=1; 

    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent intent){ 
     super.onActivityResult(requestCode, resultCode, intent); 
     if(Build.VERSION.SDK_INT >= 21){ 
      Uri[] results = null; 
      //Check if response is positive 
      if(resultCode== Activity.RESULT_OK){ 
       if(requestCode == FCR){ 
        if(null == mUMA){ 
         return; 
        } 
        if(intent == null){ 
         //Capture Photo if no image available 
         if(mCM != null){ 
          results = new Uri[]{Uri.parse(mCM)}; 
         } 
        }else{ 
         String dataString = intent.getDataString(); 
         if(dataString != null){ 
          results = new Uri[]{Uri.parse(dataString)}; 
         } 
        } 
       } 
      } 
      mUMA.onReceiveValue(results); 
      mUMA = null; 
     }else{ 
      if(requestCode == FCR){ 
       if(null == mUM) return; 
       Uri result = intent == null || resultCode != RESULT_OK ? null : intent.getData(); 
       mUM.onReceiveValue(result); 
       mUM = null; 
      } 
     } 
    } 
    @SuppressLint({"SetJavaScriptEnabled", "WrongViewCast"}) 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 

     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     int Permission_All = 1; 
     String[] Permissions = {Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.MEDIA_CONTENT_CONTROL, Manifest.permission.CAMERA, }; 
     if(!hasPermissions(this, Permissions)){ 
      ActivityCompat.requestPermissions(this, Permissions, Permission_All); 
     } 

     // 
     mProgressBar = (ProgressBar) findViewById(R.id.pb); 

     Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
     setSupportActionBar(toolbar); 

     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); 
     mwebView = (WebView) findViewById(R.id.myWebView); 
     assert mwebView != null; 
     WebSettings webSettings = mwebView.getSettings(); 
     webSettings.setJavaScriptEnabled(true); 
     webSettings.setAllowFileAccess(true); 


     CookieManager cookieManager = CookieManager.getInstance(); 
     cookieManager.setAcceptCookie(true); 
     CookieManager.getInstance().setAcceptThirdPartyCookies(mwebView, true); 

     mwebView.getSettings().setRenderPriority(WebSettings.RenderPriority.HIGH); 
     mwebView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK); 
     mwebView.getSettings().setAppCacheEnabled(true); 
     mwebView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY); 
     webSettings.setDomStorageEnabled(true); 
     webSettings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.NARROW_COLUMNS); 
     webSettings.setUseWideViewPort(true); 
     webSettings.setSavePassword(true); 
     webSettings.setSaveFormData(true); 
     webSettings.setEnableSmoothTransition(true); 
     mwebView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true); 

     mwebView.getSettings().setAllowFileAccess(true); 
     if(Build.VERSION.SDK_INT >= 21){ 
      webSettings.setMixedContentMode(0); 
      mwebView.setLayerType(View.LAYER_TYPE_HARDWARE, null); 
     }else if(Build.VERSION.SDK_INT >= 19){ 
      mwebView.setLayerType(View.LAYER_TYPE_HARDWARE, null); 
     }else if(Build.VERSION.SDK_INT >=11 && Build.VERSION.SDK_INT < 19){ 
      mwebView.setLayerType(View.LAYER_TYPE_SOFTWARE, null); 
     } 
     mwebView.setWebViewClient(new Callback()); 
     mwebView.setWebViewClient(new CustomWebViewClient()); 

     mwebView.loadUrl("https://bengalflora.in/gallery/index.php"); 




     mwebView.setWebChromeClient(new WebChromeClient(){ 
      public void onProgressChanged(WebView view, int newProgress){ 
       // Update the progress bar with page loading progress 
       mProgressBar.setProgress(newProgress); 
       if(newProgress >= 90){ 
        // Hide the progressbar 
        mProgressBar.setVisibility(View.GONE); 
       } 
      } 

      public void onReceivedError(WebView view, int errorCode, String description, String failingUrl){ 
       mwebView.loadUrl(mypage_error); 
      } 



      //For Android 3.0+ 
      public void openFileChooser(ValueCallback<Uri> uploadMsg){ 
       mUM = uploadMsg; 
       Intent i = new Intent(Intent.ACTION_GET_CONTENT); 
       i.addCategory(Intent.CATEGORY_OPENABLE); 
       i.setType("image/*"); 
       MainActivity.this.startActivityForResult(Intent.createChooser(i,"File Chooser"), FCR); 
      } 
      // For Android 3.0+, above method not supported in some android 3+ versions, in such case we use this 
      public void openFileChooser(ValueCallback uploadMsg, String acceptType){ 
       mUM = uploadMsg; 
       Intent i = new Intent(Intent.ACTION_GET_CONTENT); 
       i.addCategory(Intent.CATEGORY_OPENABLE); 
       i.setType("image/*"); 
       MainActivity.this.startActivityForResult(
         Intent.createChooser(i, "File Browser"), 
         FCR); 
      } 
      //For Android 4.1+ 
      public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture){ 
       mUM = uploadMsg; 
       Intent i = new Intent(Intent.ACTION_GET_CONTENT); 
       i.addCategory(Intent.CATEGORY_OPENABLE); 
       i.setType("image/*"); 
       MainActivity.this.startActivityForResult(Intent.createChooser(i, "File Chooser"), MainActivity.FCR); 
      } 
      //For Android 5.0+ 

      public boolean onShowFileChooser(
        WebView webView, ValueCallback<Uri[]> filePathCallback, 
        WebChromeClient.FileChooserParams fileChooserParams) { 
       if(mUMA != null){ 
        mUMA.onReceiveValue(null); 
       } 
       mUMA = filePathCallback; 
       Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
       if(takePictureIntent.resolveActivity(MainActivity.this.getPackageManager()) != null){ 
        File photoFile = null; 
        try{ 
         photoFile = createImageFile(); 
         takePictureIntent.putExtra("PhotoPath", mCM); 
        }catch(IOException ex){ 
         Log.e(TAG, "Image file creation failed", ex); 
        } 
        if(photoFile != null){ 
         mCM = "file:" + photoFile.getAbsolutePath(); 
         takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile)); 
        }else{ 
         takePictureIntent = null; 
        } 
       } 
       Intent contentSelectionIntent = new Intent(Intent.ACTION_GET_CONTENT); 
       contentSelectionIntent.addCategory(Intent.CATEGORY_OPENABLE); 
       contentSelectionIntent.setType("image/*"); 
       Intent[] intentArray; 
       if(takePictureIntent != null){ 
        intentArray = new Intent[]{takePictureIntent}; 
       }else{ 
        intentArray = new Intent[0]; 
       } 

       Intent chooserIntent = new Intent(Intent.ACTION_CHOOSER); 
       chooserIntent.putExtra(Intent.EXTRA_INTENT, contentSelectionIntent); 
       chooserIntent.putExtra(Intent.EXTRA_TITLE, "Image Chooser"); 
       chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, intentArray); 
       startActivityForResult(chooserIntent, FCR); 
       return true; 
      } 
     }); 
    } 

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


     // 
     SearchView searchView = (SearchView) menu.findItem(R.id.action_search).getActionView(); 
     SearchManager searchManager = (SearchManager) getSystemService(SEARCH_SERVICE); 
     searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName())); 
     Intent searchIntent = getIntent(); 
     String query = searchIntent.getStringExtra(SearchManager.QUERY); 
     if(Intent.ACTION_SEARCH.equals(searchIntent.getAction())) { 
      mwebView.loadUrl("http://google.co.in/?q="+query); 
     } 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 

     switch (item.getItemId()){ 
      case R.id.action_upload: 
       mwebView.loadUrl("https://xyz/uploadpage.php"); 
       return true; 
      case R.id.action_reload: 
       mwebView.reload(); 
       return true; 

      case R.id.action_about: 
       startActivity(new Intent(this, Aboutus.class)); 
       return true; 



      case R.id.action_exit: 
       finish(); 


     } 


     return super.onOptionsItemSelected(item); 
    } 

    ///////////////multiple permission code 
    public static boolean hasPermissions(Context context, String... permissions){ 

     if(Build.VERSION.SDK_INT>=Build.VERSION_CODES.M && context!=null && permissions!=null){ 
      for(String permission: permissions){ 
       if(ActivityCompat.checkSelfPermission(context, permission)!=PackageManager.PERMISSION_GRANTED){ 
        return false; 
       } 
      } 
     } 
     return true; 
    } 
    @SuppressWarnings("StatementWithEmptyBody") 
    @Override 
    public boolean onNavigationItemSelected(MenuItem item) { 
     // Handle navigation view item clicks here. 
     int id = item.getItemId(); 

     if (id == R.id.nav_local) { 
      mwebView.loadUrl("http://xyz/index.php?/category/1&mobile=true"); 
     } else if (id == R.id.nav_spices) { 
      mwebView.loadUrl("http://xyz?/category/84&mobile=true"); 
     } else if (id == R.id.nav_vherbarium) { 
      mwebView.loadUrl("http://xyz/index.php?/category/36&mobile=true"); 
     } else if (id == R.id.nav_usersupload) { 
      mwebView.loadUrl("http://xyz/index.php?/category/user&mobile=true"); 
     } else if (id == R.id.nav_recent) { 
      mwebView.loadUrl("http://xyz/index.php?/recent_pics&mobile=true"); 

     } else if (id == R.id.nav_login) { 
      mwebView.loadUrl("http://xyz/identification.php?mobile=true"); 
     } else if (id == R.id.nav_register) { 
      mwebView.loadUrl("http://xyz/register.php?mobile=true"); 

     } else if (id == R.id.nav_contact) { 
      mwebView.loadUrl("http://xyz/contact/&mobile=true"); 
     } 

     DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
     drawer.closeDrawer(GravityCompat.START); 
     return true; 
    } 

    public class CustomWebViewClient extends WebViewClient { 
     @Override 
     public void onPageStarted(WebView view, String url, Bitmap favicon){ 
      // Do something on page loading started 
      // Visible the progressbar 
      mProgressBar.setVisibility(View.VISIBLE); 
     } 


     public void onReceivedError(WebView view, int errorCode, String description, String failingUrl){ 
      mwebView.loadUrl(mypage_error); 
     } 
     @Override 
     public boolean shouldOverrideUrlLoading(WebView webView, String url) { 
      if(url.contains("something")) return true; 
      return false; //Default is to not override unless our condition is met. 
     } 
     public void onPageFinished(WebView webView, String url) { 


      String webUrl = webView.getUrl(); 
      System.out.println(webUrl); 
      if(url.startsWith("https://xyz/plugins/oAuth/auth.php?provider=Facebook&openid_identifier=&init_auth=1#_=_")) 
      { 
       String redirectUrl = "https://xyz/gallery/facloginapp.php"; 
       webView.loadUrl(redirectUrl); 
       return; 
      } 
      super.onPageFinished(webView, url); 
      mProgressBar.setVisibility(View.GONE); 
     } 
    } 
    public class Callback extends WebViewClient { 
     public void onReceivedError(WebView view, int errorCode, String description, String failingUrl){ 
      mwebView.loadUrl(mypage_error); 
     } 
    } 
    // Create an image file 
    private File createImageFile() throws IOException{ 
     @SuppressLint("SimpleDateFormat") String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date()); 
     String imageFileName = "img_"+timeStamp+"_"; 
     File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES); 
     return File.createTempFile(imageFileName,".jpg",storageDir); 
    } 
    @Override 
    public boolean onKeyDown(int keyCode, KeyEvent event){ 
     if(event.getAction() == KeyEvent.ACTION_DOWN){ 
      switch(keyCode){ 
       case KeyEvent.KEYCODE_BACK: 

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
        if (drawer.isDrawerOpen(GravityCompat.START)) { 
         drawer.closeDrawer(GravityCompat.START); 
        } 

        else{ 

         if(mwebView.canGoBack()){ 
          mwebView.goBack(); 
         } 
         else if (mBackPressed + TIME_INTERVAL > System.currentTimeMillis()) 
         { 
          super.onBackPressed(); 

         } 
         else { Toast.makeText(getBaseContext(), "Press back button once quickly to exit", Toast.LENGTH_SHORT).show(); } 

         mBackPressed = System.currentTimeMillis(); 





        } 
        return true; 
      } 
     } 
     return super.onKeyDown(keyCode, event); 
    } 



    @Override 
    public void onConfigurationChanged(Configuration newConfig){ 
     super.onConfigurationChanged(newConfig); 
    }} 

Answer 1

有许多实现，但常见的是包括在应用栏搜索视图。

创建带有搜索视图的菜单资源文件。

<?xml version="1.0" encoding="utf-8"?> 
<menu xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:app="http://schemas.android.com/apk/res-auto"> 

<item 
    android:id="@+id/search" 
    android:title="Search" 
    app:showAsAction="always" 
    app:actionViewClass="android.support.v7.widget.SearchView" 
    /> 
</menu> 

然后，在活动或片段设置oncreateoptionsmenu和膨胀的上述菜单项目

@Override 
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { 
    super.onCreateOptionsMenu(menu, inflater); 
    inflater.inflate(R.menu.main_menu, menu); 
    MenuItem item = menu.findItem(R.id.search); 
    SearchView searchview = (SearchView) item.getActionView(); 
    searchview.setOnQueryTextListener(new SearchView.OnQueryTextListener() { 
     @Override 
     public boolean onQueryTextSubmit(String query) { 
      Log.d("hello", query); 
      msp_editor.putString("query", query); 
      msp_editor.commit(); 
      fetchData(query); 
      return false; 
     } 

     @Override 
     public boolean onQueryTextChange(String newText) { 
      return false; 
     } 
    }); 
} 

通过创建RES/XML/searchable.xml文件创建可搜索配置和声明在清单文件的元数据，你可以从官方的documentation得到更多关于安装的说明，但是在上面的代码中我给出了我的搜索视图的实现。当用户输入搜索查询时，我会通过查询侦听器并将查询传递给我的翻新API调用。