在 webview Activity 上打开 Json url

Question

我有一个从 json URI (http://api.androidhive.info/feed/feed.json) 获取内容并在列表视图中显示内容的活动。

内容包括图片、帖子的URI、描述等。每个内容项都有自己的URI。

我不想使用网络浏览器打开点击的 URI，而是希望在具有 web 视图的 另一个 活动中打开它。

很抱歉再次提出这个问题，我遇到了问题。我从http:// www.androidhive.info/2014/06/android-facebook-like-custom-listview-feed-using-volley 获得了一个运行良好的源代码，并且我在尝试传递点击链接以在应用程序 web 视图中打开时遇到问题。

这是 JSON 数据

{
    "feed": [


        {
            "id": 2,
            "name": "TIME",
            "image": "http://api.androidhive.info/feed/img/time_best.jpg",
            "status": "30 years of Cirque du Soleil's best photos",
            "profilePic": "http://api.androidhive.info/feed/img/time.png",
            "timeStamp": "1403375851930",
            "url": "http://ti.me/1qW8MLB"
        },
        {
            "id": 11,
            "name": "A. R. rahman",
            "image": "http://api.androidhive.info/feed/img/ar_bw.jpg",
            "status": "",
            "profilePic": "http://api.androidhive.info/feed/img/ar.jpg",
            "timeStamp": "1403375851930",
            "url": ""
        }
    ]
}

这是 MainActivity.java

package info.androidhive.listviewfeed;

public class MainActivity extends Activity {

private static final String TAG = MainActivity.class.getSimpleName();

private ListView listView;

private FeedListAdapter listAdapter;

private List<FeedItem> feedItems;

private String URL_FEED = "http://api.androidhive.info/feed/feed.json";

    @SuppressLint("NewApi")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        listView = (ListView) findViewById(R.id.list);

        feedItems = new ArrayList<FeedItem>();

        listAdapter = new FeedListAdapter(this, feedItems);
        listView.setAdapter(listAdapter);

        // These two lines not needed,
        // just to get the look of facebook (changing background color & hiding the icon)
        getActionBar().setBackgroundDrawable(new ColorDrawable(Color.parseColor("#3b5998")));
        getActionBar().setIcon(
                   new ColorDrawable(getResources().getColor(android.R.color.transparent)));

        // We first check for cached request
        Cache cache = AppController.getInstance().getRequestQueue().getCache();
        Entry entry = cache.get(URL_FEED);
        if (entry != null) {
            // fetch the data from cache
            try {
                String data = new String(entry.data, "UTF-8");
                try {
                    parseJsonFeed(new JSONObject(data));
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }

        } else {
            // making fresh volley request and getting json
            JsonObjectRequest jsonReq = new JsonObjectRequest(Method.GET,
                    URL_FEED, null, new Response.Listener<JSONObject>() {

                        @Override
                        public void onResponse(JSONObject response) {
                            VolleyLog.d(TAG, "Response: " + response.toString());
                            if (response != null) {
                                parseJsonFeed(response);
                            }
                        }
                    }, new Response.ErrorListener() {

                        @Override
                        public void onErrorResponse(VolleyError error) {
                            VolleyLog.d(TAG, "Error: " + error.getMessage());
                        }
                    });

            // Adding request to volley request queue
            AppController.getInstance().addToRequestQueue(jsonReq);
        }

    }

    /**
     * Parsing json reponse and passing the data to feed view list adapter
     * */
    private void parseJsonFeed(JSONObject response) {
        try {
            JSONArray feedArray = response.getJSONArray("feed");

            for (int i = 0; i < feedArray.length(); i++) {
                JSONObject feedObj = (JSONObject) feedArray.get(i);

                FeedItem item = new FeedItem();
                item.setId(feedObj.getInt("id"));
                item.setName(feedObj.getString("name"));

                // Image might be null sometimes
                String image = feedObj.isNull("image") ? null : feedObj
                        .getString("image");
                item.setImge(image);
                item.setStatus(feedObj.getString("status"));
                item.setProfilePic(feedObj.getString("profilePic"));
                item.setTimeStamp(feedObj.getString("timeStamp"));

                // url might be null sometimes
                String feedUrl = feedObj.isNull("url") ? null : feedObj
                        .getString("url");
                item.setUrl(feedUrl);

                feedItems.add(item);
            }

            // notify data changes to list adapater
            listAdapter.notifyDataSetChanged();
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}

这是我从http:// api.androidhive.info/feed/feed.json 获得的链接被传递并在点击时在 webview 中打开时创建的 webview.java

public class webview extends Activity{

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.webview);
        String getStringFromEdittext = "https:// www.google.co.in"+      getIntent().getExtras().getString("text");
        WebView wb = (WebView)findViewById(R.id.webView1);

        wb.setWebViewClient(new WebViewClient());
        System.out.println("URL"+getStringFromEdittext);
        wb.loadUrl(getStringFromEdittext );
        wb.getSettings().setJavaScriptEnabled(true);
        Button button = (Button)findViewById(R.id.button1);
        button.setOnClickListener(new View.OnClickListener() {

                    @Override
                    public void onClick(View v) {
                        // TODO Auto-generated method stub
                           Intent intent = new Intent(getApplicationContext(), MainActivity.class);
                           startActivity(intent);
                    }
                });
}
}

Answer 1

这可能不是您正在寻找的，但这就是我自己的方式。这个答案有点与你需要的东西有关，而不是你需要的百分百。

我了解您希望链接在 webview 而不是 android 网络浏览器上打开，我利用http://www.androidhive.info/2013/11/android-working-with-action-bar/ 帖子的帮助来重组上述编码

我再重复一遍，这段代码可能不是你需要的 100%，而且它主要是为了那些想要将上述代码用于 wordpress 或带有 www.example.com/page.php 之类 URL 的网站的人?1d=10

这将是 MainActivity.java 公共类 MainActivity 扩展 Activity {

private static final String TAG = MainActivity.class.getSimpleName();
private ListView listView;
private FeedListAdapter listAdapter;
private List<FeedItem> feedItems;
private String URL_FEED = "http://api.androidhive.info/feed/feed.json";

// action bar
    private ActionBar actionBar;

@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    listView = (ListView) findViewById(R.id.list);
    feedItems = new ArrayList<FeedItem>();

    listAdapter = new FeedListAdapter(this, feedItems);
    listView.setAdapter(listAdapter);

    actionBar = getActionBar();

    // Hide the action bar title
            actionBar.setDisplayShowTitleEnabled(false);

    // These two lines not needed,
    // just to get the look of facebook (changing background color & hiding the icon)
    getActionBar().setBackgroundDrawable(new ColorDrawable(Color.parseColor("#3b5998")));
    getActionBar().setIcon(
               new ColorDrawable(getResources().getColor(android.R.color.transparent)));

    // We first check for cached request
    Cache cache = AppController.getInstance().getRequestQueue().getCache();
    Entry entry = cache.get(URL_FEED);
    if (entry != null) {
        // fetch the data from cache
        try {
            String data = new String(entry.data, "UTF-8");
            try {
                parseJsonFeed(new JSONObject(data));
            } catch (JSONException e) {
                e.printStackTrace();
            }
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }

    } else {
        // making fresh volley request and getting json
        JsonObjectRequest jsonReq = new JsonObjectRequest(Method.GET,
                URL_FEED, null, new Response.Listener<JSONObject>() {

                    @Override
                    public void onResponse(JSONObject response) {
                        VolleyLog.d(TAG, "Response: " + response.toString());
                        if (response != null) {
                            parseJsonFeed(response);
                        }
                    }
                }, new Response.ErrorListener() {

                    @Override
                    public void onErrorResponse(VolleyError error) {
                        VolleyLog.d(TAG, "Error: " + error.getMessage());
                    }
                });

        // Adding request to volley request queue
        AppController.getInstance().addToRequestQueue(jsonReq);
    }

}

/**
 * Parsing json reponse and passing the data to feed view list adapter
 * */
private void parseJsonFeed(JSONObject response) {
    try {
        JSONArray feedArray = response.getJSONArray("feed");

        for (int i = 0; i < feedArray.length(); i++) {
            JSONObject feedObj = (JSONObject) feedArray.get(i);

            FeedItem item = new FeedItem();
            item.setId(feedObj.getInt("id"));
            item.setName(feedObj.getString("name"));

            // Image might be null sometimes
            String image = feedObj.isNull("image") ? null : feedObj
                    .getString("image");
            item.setImge(image);
            item.setStatus(feedObj.getString("status"));
            item.setProfilePic(feedObj.getString("profilePic"));
            item.setTimeStamp(feedObj.getString("timeStamp"));

            // url might be null sometimes
            String feedUrl = feedObj.isNull("url") ? null : feedObj
                    .getString("url");
            item.setUrl(feedUrl);
            feedItems.add(item);

            //Intent intent = new Intent(MainActivity.this, webview.class);
            //intent.putExtra("text", feedUrl.toString());
            //startActivity(intent);
        }

        // notify data changes to list adapater
        listAdapter.notifyDataSetChanged();
    } catch (JSONException e) {
        e.printStackTrace();
    }
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.activity_main_actions, menu);

    // Associate searchable configuration with the SearchView
    SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
    SearchView searchView = (SearchView) menu.findItem(R.id.action_search)
            .getActionView();
    searchView.setSearchableInfo(searchManager
            .getSearchableInfo(getComponentName()));

    return super.onCreateOptionsMenu(menu);
}

/**
 * On selecting action bar icons
 * */
@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Take appropriate action for each action item click
    switch (item.getItemId()) {
    case R.id.action_search:
        // search action
        return true;
    default:
        return super.onOptionsItemSelected(item);
    }
}

}

对于 webview 端，这是完整的代码

SearchResultsActivity.java

包信息.androidhive.listviewfeed;

公共类 SearchResultsActivity 扩展 Activity {

private TextView txtQuery;

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

    // get the action bar
    ActionBar actionBar = getActionBar();

    // Enabling Back navigation on Action Bar icon
    actionBar.setDisplayHomeAsUpEnabled(true);

    txtQuery = (TextView) findViewById(R.id.txtQuery);

    handleIntent(getIntent());
}

@Override
protected void onNewIntent(Intent intent) {
    setIntent(intent);
    handleIntent(intent);
}

/**
 * Handling intent data
 */
private void handleIntent(Intent intent) {
    if (Intent.ACTION_SEARCH.equals(intent.getAction())) {
        String query = "http://www.guruslodge.com/"+ intent.getStringExtra(SearchManager.QUERY);

        /**
         * Use this query to display search results like 
         * 1. Getting the data from SQLite and showing in listview 
         * 2. Making webrequest and displaying the data 
         * For now we just display the query only
         */
        txtQuery.setText("Search Query: " + query);

        WebView wb = (WebView)findViewById(R.id.webView1);

        wb.setWebViewClient(new WebViewClient());
        System.out.println("URL"+query);
        wb.loadUrl(query );
        wb.getSettings().setJavaScriptEnabled(true);

        wb.setWebViewClient(new WebViewClient() {
            public void onReceivedError(WebView webView, int errorCode, String description, String failingUrl) {
                try {
                    webView.stopLoading();
                } catch (Exception e) {
                }

                if (webView.canGoBack()) {
                    webView.goBack();
                }

                webView.loadUrl("about:blank");
                AlertDialog alertDialog = new AlertDialog.Builder(SearchResultsActivity.this).create();
                alertDialog.setTitle("Error");
                alertDialog.setMessage("Cannot connect to the Elitesbase Server. Check your internet connection and try again.");
                alertDialog.setButton(DialogInterface.BUTTON_POSITIVE, "Try Again", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        finish();
                        startActivity(getIntent());
                    }
                });

                alertDialog.show();
                super.onReceivedError(webView, errorCode, description, failingUrl);
            }
        });

    }

}

}

AndroidManifest.xml

<uses-sdk
    android:minSdkVersion="11"
    android:targetSdkVersion="19" />

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

<application
    android:name=".app.AppController"
    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" >
        <meta-data
            android:name="android.app.default_searchable"
            android:value=".SearchResultsActivity" />
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

    <!-- Search results activity -->
    <activity android:name=".SearchResultsActivity"
        android:parentActivityName=".MainActivity" >
        <intent-filter>
            <action android:name="android.intent.action.SEARCH" />
        </intent-filter>

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

    </activity>
 <activity
        android:name=".webview"
        android:label="@string/app_name" >

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

        <data
            android:host="elitesbase.com"
            android:pathPrefix="/cgi-sys/"
            android:scheme="http" />
        <data
            android:host="www.elitesbase.com"
            android:pathPrefix="/cgi-sys/"
            android:scheme="http" />
    </intent-filter>
    </activity>
</application>