如何在webview中搜索文本

时间：2013-05-31 04:53:41

标签： android text webview

我在android工作......我是这个领域的新手...我开发了一个webview ...我需要在webview中搜索特定的文本...我搜索了一些问题，比如t { {3}}但我没有得到正确答案

我做了这么多代码但是在执行webview时显示但我在代码中给出的按钮丢失了

* 

private static final int SEARCH_MENU_ID = Menu.FIRST;  

    @Override  
    public boolean onCreateOptionsMenu(Menu menu){  
    super.onCreateOptionsMenu(menu);  

    menu.add(0, SEARCH_MENU_ID, 0, "Search");  

    return true;  
    }  

    public boolean onPrepareOptionsMenu(Menu menu){  
    super.onPrepareOptionsMenu(menu);  
    return true;  
    }  

    public boolean onOptionsItemSelected(MenuItem item){  
    switch(item.getItemId()){  
    case SEARCH_MENU_ID:  
    search();  
    return true;  
    }  
    return true;  
    }  

    public void search(){  
    container = (LinearLayout)findViewById(R.id.lLayout1);  

    nextButton = new Button(this);  
    nextButton.setText("Next"); 
    nextButton.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {


            mWebView.findNext(true); 
            // TODO Auto-generated method stub

        }
    });
    container.addView(nextButton);  

    closeButton = new Button(this);  
    closeButton.setText("Close");
    closeButton.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {




            container.removeAllViews();
            // TODO Auto-generated method stub

        }
    });


    container.addView(closeButton);  

    findBox = new EditText(this);  
findBox.setMinEms(30);  
findBox.setSingleLine(true);  
findBox.setHint("Search"); 
findBox.setOnKeyListener(new OnKeyListener(){  
public boolean onKey(View v, int keyCode, KeyEvent event){  
if((event.getAction() == KeyEvent.ACTION_DOWN) && ((keyCode == KeyEvent.KEYCODE_ENTER))){  
mWebView.findAll(findBox.getText().toString());  

try{  
Method m = WebView.class.getMethod("setFindIsUp", Boolean.TYPE);  
m.invoke(mWebView, true);  
}catch(Exception ignored){}  
}  
return false;  
}  
});


    }
}

*

4 个答案:

答案 0 :(得分：5)

虽然这是一个较旧的问题，但基于AndroidEnthusiastic的版本，我设法将一个实际工作得相当不错的版本组合在一起。三星Note上的按钮类型有一个小错误我测试了它，但无论我如何更改IME类型，它都搞砸了。所以我只是隐藏了软键盘。但布局更好。

public class SearchDemoActivity extends ActionBarActivity implements View.OnClickListener
{
WebView mWebView;
private RelativeLayout container;
private Button nextButton, closeButton;
private EditText findBox;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_search);
    getActionBar().setTitle(R.string.information_display);
    mWebView = (WebView) findViewById(R.id.webview);
    mWebView.setWebViewClient(new WebViewClient());
    mWebView.loadUrl("http://devemat-androidprogramming.blogspot.com/");

    nextButton = (Button) findViewById(R.id.nextButton);
    closeButton = (Button) findViewById(R.id.closeButton);
    findBox = (EditText) findViewById(R.id.findBox);
    findBox.setSingleLine(true);
    findBox.setOnKeyListener(new OnKeyListener()
    {
        public boolean onKey(View v, int keyCode, KeyEvent event)
        {
            if ((event.getAction() == KeyEvent.ACTION_DOWN) && ((keyCode == KeyEvent.KEYCODE_ENTER)))
            {
                mWebView.findAll(findBox.getText().toString());

                try
                {
                    // Can't use getMethod() as it's a private method
                    for (Method m : WebView.class.getDeclaredMethods())
                    {
                        if (m.getName().equals("setFindIsUp"))
                        {
                            m.setAccessible(true);
                            m.invoke(mWebView, true);
                            break;
                        }
                    }
                }
                catch (Exception ignored)
                {
                }
                finally
                {
                    InputMethodManager inputManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
                    // check if no view has focus:
                    View vv = getCurrentFocus();
                    if (vv != null)
                    {
                        inputManager.hideSoftInputFromWindow(v.getWindowToken(),
                                InputMethodManager.HIDE_NOT_ALWAYS);
                    }
                }
            }
            return false;
        }
    });
    nextButton.setOnClickListener(this);
    closeButton.setOnClickListener(this);

}

@Override
public boolean onCreateOptionsMenu(Menu menu)
{
    super.onCreateOptionsMenu(menu);
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.searchview_in_menu, menu);
    return true;
}

public boolean onPrepareOptionsMenu(Menu menu)
{
    super.onPrepareOptionsMenu(menu);
    return true;
}

public boolean onOptionsItemSelected(MenuItem item)
{
    switch (item.getItemId())
    {
        case R.id.action_search:
            search();
            return true;
    }
    return true;
}

public void search()
{
    container = (RelativeLayout) findViewById(R.id.layoutId);
    if (container.getVisibility() == RelativeLayout.GONE)
    {
        container.setVisibility(RelativeLayout.VISIBLE);
    }
    else if (container.getVisibility() == RelativeLayout.VISIBLE)
    {
        container.setVisibility(RelativeLayout.GONE);
    }
}

@Override
public void onClick(View v)
{
    if (v == nextButton)
    {
        mWebView.findNext(true);
    }
    else if (v == closeButton)
    {
        container.setVisibility(RelativeLayout.GONE);
    }
}
}

布局XML（activity_search.xml）：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent" >

<WebView
    android:id="@+id/webview"
    android:layout_width="fill_parent"
    android:layout_height="match_parent"
    android:layout_below="@+id/layoutId" />

<RelativeLayout
    android:id="@+id/layoutId"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:visibility="gone" >

    <Button
        android:id="@+id/closeButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:text="Close" />

    <Button
        android:id="@+id/nextButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toLeftOf="@+id/closeButton"
        android:text="Next" />

    <EditText
        android:id="@+id/findBox"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_toLeftOf="@+id/nextButton"
        android:hint="Enter search keyword here."
        android:singleLine="true" />
  </RelativeLayout>

</RelativeLayout>

菜单：

<menu xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:custom="http://schemas.android.com/apk/res-auto" >

<item
    android:id="@+id/action_search"
    android:icon="@android:drawable/ic_menu_search"
    custom:showAsAction="always"
    android:title="@string/action_search"/>
</menu>

答案 1 :(得分：2)

请尝试此代码段

  package com.search.demo;  


 import java.lang.reflect.Method;  

 import android.app.Activity;  
 import android.os.Bundle;  
 import android.view.KeyEvent;  
 import android.view.Menu;  
 import android.view.MenuItem;  
 import android.view.View;  
 import android.view.View.OnClickListener;  
 import android.view.View.OnKeyListener;  
 import android.webkit.WebView;  
 import android.widget.Button;  
 import android.widget.EditText;  
 import android.widget.LinearLayout;  

 public class SearchDemoActivity extends Activity {  
  WebView mWebView;  
  private LinearLayout container;  
  private Button nextButton, closeButton;  
 private EditText findBox;  
/** Called when the activity is first created. */  
@Override  
public void onCreate(Bundle savedInstanceState) {  
    super.onCreate(savedInstanceState);  
    setContentView(R.layout.main);  
    mWebView = (WebView)findViewById(R.id.webview);  
    mWebView.loadUrl("http://devemat-androidprogramming.blogspot.com/");  
}  

private static final int SEARCH_MENU_ID = Menu.FIRST;  

@Override  
public boolean onCreateOptionsMenu(Menu menu){  
super.onCreateOptionsMenu(menu);  

menu.add(0, SEARCH_MENU_ID, 0, "Search");  

return true;  
}  

public boolean onPrepareOptionsMenu(Menu menu){  
super.onPrepareOptionsMenu(menu);  
return true;  
}  

public boolean onOptionsItemSelected(MenuItem item){  
switch(item.getItemId()){  
case SEARCH_MENU_ID:  
search();  
return true;  
}  
return true;  
}  

public void search(){  
container = (LinearLayout)findViewById(R.id.layoutId);  

nextButton = new Button(this);  
nextButton.setText("Next");  
nextButton.setOnClickListener(new OnClickListener(){  
@Override  
public void onClick(View v){  
mWebView.findNext(true);  
}  
});  
container.addView(nextButton);  

closeButton = new Button(this);  
closeButton.setText("Close");  
closeButton.setOnClickListener(new OnClickListener(){  
@Override  
public void onClick(View v){  
container.removeAllViews();  

 }  
});  
container.addView(closeButton);  

findBox = new EditText(this);  
findBox.setMinEms(30);  
findBox.setSingleLine(true);  
findBox.setHint("Search");  

findBox.setOnKeyListener(new OnKeyListener(){  
public boolean onKey(View v, int keyCode, KeyEvent event){  
if((event.getAction() == KeyEvent.ACTION_DOWN) && ((keyCode == KeyEvent.KEYCODE_ENTER))){  
mWebView.findAll(findBox.getText().toString());  

try{  
Method m = WebView.class.getMethod("setFindIsUp", Boolean.TYPE);  
m.invoke(mWebView, true);  
}catch(Exception ignored){}  
}  
return false;  
}  
});  

container.addView(findBox);  
}  
}

答案 2 :(得分：0)

我简化了它以供我使用

    findBox.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                webView.findAll(findBox.getText().toString());
            }

            @Override
            public void afterTextChanged(Editable s) {

            }
    });
    nextButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                webView.findNext(true);
            }
    });
    closeButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                layoutId.setVisibility(View.GONE);
                webView.clearMatches();
                closeKeyboard(MainActivity.this);
            }
    });

答案 3 :(得分：-1)

要从WebView连续检查文本，请使用以下代码：

webView.setFindListener(new WebView.FindListener() {
    @Override
    public void onFindResultReceived(int activeMatchOrdinal, int numberOfMatches, boolean isDoneCounting) {
        webView.findAllAsync("Search Text"); //find text for each foundresult
    }
});
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