Question

在基本的webview应用程序中，我希望用户能够在某种首选项菜单中手动更改链接。

如何将文本字段连接到mWebView.loadUrl？

<EditText
    android:id="@+id/your_link"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:inputType="text" />

mWebView.loadUrl("http://domain.com/**your_link**/");

此外，我希望应用记住链接，以便用户不必每次都输入，只需在需要时进行更改。

Answer 1

您可以在DateTime上保存地址，在加载时检索该地址并在您打开SharedPreferences或某些用户操作时加载WebView的网址（按a例如Activity：

<强> activity_main.xml中

Button

<强> WebViewActivity.java

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <EditText
            android:id="@+id/edit"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"/>

        <Button
            android:id="@+id/change"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="0"
            android:text="Change link"/>
    </LinearLayout>

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

</LinearLayout>

Answer 2

截图：

http://image.prntscr.com/image/c652033930e54938b170786a4f86570e.png http://image.prntscr.com/image/c7ef33aa812642b094f77cc71b2f3bcc.png

示例代码：

<强> DemoWebView.java

public class DemoWebView extends AppCompatActivity {

private WebView webView;
private AutoCompleteTextView edtUrl;
public static final String PREFS_NAME = "HistoryPrefs";
public static final String PREFS_SEARCH_HISTORY = "SearchHistory";
private SharedPreferences sharedPreferences;
private Set<String> history;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.webview);

    webView = (WebView) findViewById(R.id.webview);
    edtUrl = (AutoCompleteTextView) findViewById(R.id.edt_url);

    WebSettings settings = webView.getSettings();
    settings.setJavaScriptEnabled(true);
    webView.setWebViewClient(new MyBrowser(DemoWebView.this));

    webView.canGoBack();
    webView.canGoForward();
    webView.setScrollBarStyle(View.SCROLLBARS_OUTSIDE_OVERLAY);
    webView.getSettings().setBuiltInZoomControls(true);
    webView.getSettings().setDisplayZoomControls(false);
    webView.getSettings().setSupportZoom(false);

    edtUrl.setOnEditorActionListener(new TextView.OnEditorActionListener() {
        @Override
        public boolean onEditorAction(TextView textView, int i, KeyEvent keyEvent) {
            if (i == EditorInfo.IME_ACTION_GO) {
                webView.loadUrl("http://" + edtUrl.getText().toString());
                addSearchInput(edtUrl.getText().toString());
            }
            return false;
        }
    });

    sharedPreferences = getSharedPreferences(PREFS_NAME, 0);
    history = sharedPreferences.getStringSet(PREFS_SEARCH_HISTORY, new HashSet<String>());
    setAutoCompleteSource();
}

private void setAutoCompleteSource() {
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(
            this, android.R.layout.simple_list_item_1, history.toArray(new String[history.size()]));
    edtUrl.setAdapter(adapter);
}

private void addSearchInput(String input) {
    if (!history.contains(input)) {
        history.add(input);
        setAutoCompleteSource();
    }
}

private void savePrefs() {
    SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
    SharedPreferences.Editor editor = settings.edit();
    editor.putStringSet(PREFS_SEARCH_HISTORY, history);
    editor.commit();
}

@Override
protected void onStop() {
    super.onStop();
    savePrefs();
}

}

<强> webview.xml

    <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
    <AutoCompleteTextView
        android:id="@+id/edt_url"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:layout_margin="8dp"
        android:background="@android:drawable/editbox_background"
        android:hint="Enter URL Here"
        android:inputType="textPersonName"
        android:maxLines="1"
        android:imeOptions="actionGo"
        android:textColor="@color/black_alpha_80"
        android:textSize="16sp" />

    <WebView
        android:id="@+id/webview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        android:clickable="true" />
</LinearLayout>

<强> MyBrowser.java

public class MyBrowser extends WebViewClient {

private Activity mActivity;
private ProgressDialog mProgressDialog;
private String mainUrl = "";

public MyBrowser(Activity activity) {
    mActivity = activity;
}

public MyBrowser(Activity activity, String mainUrl) {
    this.mainUrl = mainUrl;
    mActivity = activity;
}

@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
    view.loadUrl(url);
    showProgress();
    return true;
}

@Override
public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
    super.onReceivedError(view, request, error);
    view.loadUrl("");
    Toast.makeText(mActivity, mActivity.getString(R.string.not_load_data), Toast.LENGTH_LONG);
}

@Override
public void onReceivedHttpError(WebView view, WebResourceRequest request, WebResourceResponse errorResponse) {
    super.onReceivedHttpError(view, request, errorResponse);
}

@Override
public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
    handler.proceed(); // Ignore SSL certificate errors
}

@Override
public void onPageFinished(WebView view, String url) {
    try {
        Log.e("Progress==>", view.getProgress() + "");
        dismissProgress();
    } catch (Exception exception) {
        Log.e("Exception==", exception + "");
        exception.printStackTrace();
    }
}

@Override
public void onLoadResource(WebView view, String url) {
    super.onLoadResource(view, url);
    if (mProgressDialog == null) {
        showProgress();
    }
}

private void showProgress() {
    Util.isCancelable = true;
    mProgressDialog = Util.getProgressDialog(mActivity);
}

private void dismissProgress() {
    Util.isCancelable = false;
    Util.dismissDialog(mActivity, mProgressDialog);
}
}

从文本字段更改webview源

2 个答案: