android:从片段打开chrome自定义选项卡

我有一个活动MainActivity.它包含一个ViewPager托管片段FragmentPlaceHolder.这个片段有一个RecyclerView.

现在,只需点击特定视图,按钮,在RecyclerView项目中,我想打开新的Chrome自定义标签Activity.任何人都可以帮我这个吗？我期待着一步一步的实施Chrome Custom tabs.

谢谢.

所以,我这样做了:

首先,在以下内容中添加以下依赖项build.gradle(app):

编译'com.android.support:customtabs:23.1.1'

首先创建一个活动WebviewActivity:

WebViewActivity.java

public class WebviewActivity extends AppCompatActivity {
    public static final String EXTRA_URL = "extra.url";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_webview);
        String url = getIntent().getStringExtra(EXTRA_URL);
        WebView webView = (WebView)findViewById(R.id.webview);
        webView.setWebViewClient(new WebViewClient());
        WebSettings webSettings = webView.getSettings();
        webSettings.setJavaScriptEnabled(true);
        setTitle(url);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        webView.loadUrl(url);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            // Respond to the action bar's Up/Home button
            case android.R.id.home:
                finish();
                return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

现在,说按钮点击你想打开chrome自定义选项卡并加载www.google.com,所以,执行如下:

public void onButtonClick(View view){
    CustomTabsIntent customTabsIntent = new CustomTabsIntent.Builder().build();
    CustomTabActivityHelper.openCustomTab(
        this,// activity
        customTabsIntent,
        Uri.parse("http://www.google.com"), 
        new WebviewFallback()
    );

}

activity_webview.xml

然后,简单地如下所示:

CustomTabActivityHelper.java

import android.app.Activity;
import android.net.Uri;
import android.os.Bundle;
import android.support.customtabs.CustomTabsClient;
import android.support.customtabs.CustomTabsIntent;
import android.support.customtabs.CustomTabsServiceConnection;
import android.support.customtabs.CustomTabsSession;

import java.util.List;

/**
 * This is a helper class to manage the connection to the Custom Tabs Service.
 */
public class CustomTabActivityHelper implements ServiceConnectionCallback {
    private CustomTabsSession mCustomTabsSession;
    private CustomTabsClient mClient;
    private CustomTabsServiceConnection mConnection;
    private ConnectionCallback mConnectionCallback;

    /**
     * Opens the URL on a Custom Tab if possible. Otherwise fallsback to opening it on a WebView.
     *
     * @param activity         The host activity.
     * @param customTabsIntent a CustomTabsIntent to be used if Custom Tabs is available.
     * @param uri              the Uri to be opened.
     * @param fallback         a CustomTabFallback to be used if Custom Tabs is not available.
     */
    public static void openCustomTab(Activity activity,
                                     CustomTabsIntent customTabsIntent,
                                     Uri uri,
                                     CustomTabFallback fallback) {
        String packageName = CustomTabsHelper.getPackageNameToUse(activity);

        //If we cant find a package name, it means theres no browser that supports
        //Chrome Custom Tabs installed. So, we fallback to the webview
        if (packageName == null) {
            if (fallback != null) {
                fallback.openUri(activity, uri);
            }
        } else {
            customTabsIntent.intent.setPackage(packageName);
            customTabsIntent.launchUrl(activity, uri);
        }
    }

    /**
     * Unbinds the Activity from the Custom Tabs Service.
     *
     * @param activity the activity that is connected to the service.
     */
    public void unbindCustomTabsService(Activity activity) {
        if (mConnection == null) return;
        activity.unbindService(mConnection);
        mClient = null;
        mCustomTabsSession = null;
        mConnection = null;
    }

    /**
     * Creates or retrieves an exiting CustomTabsSession.
     *
     * @return a CustomTabsSession.
     */
    public CustomTabsSession getSession() {
        if (mClient == null) {
            mCustomTabsSession = null;
        } else if (mCustomTabsSession == null) {
            mCustomTabsSession = mClient.newSession(null);
        }
        return mCustomTabsSession;
    }

    /**
     * Register a Callback to be called when connected or disconnected from the Custom Tabs Service.
     *
     * @param connectionCallback
     */
    public void setConnectionCallback(ConnectionCallback connectionCallback) {
        this.mConnectionCallback = connectionCallback;
    }

    /**
     * Binds the Activity to the Custom Tabs Service.
     *
     * @param activity the activity to be binded to the service.
     */
    public void bindCustomTabsService(Activity activity) {
        if (mClient != null) return;

        String packageName = CustomTabsHelper.getPackageNameToUse(activity);
        if (packageName == null) return;

        mConnection = new ServiceConnection(this);
        CustomTabsClient.bindCustomTabsService(activity, packageName, mConnection);
    }

    /**
     * @return true if call to mayLaunchUrl was accepted.
     * @see {@link CustomTabsSession#mayLaunchUrl(Uri, Bundle, List)}.
     */
    public boolean mayLaunchUrl(Uri uri, Bundle extras, List otherLikelyBundles) {
        if (mClient == null) return false;

        CustomTabsSession session = getSession();
        if (session == null) return false;

        return session.mayLaunchUrl(uri, extras, otherLikelyBundles);
    }

    @Override
    public void onServiceConnected(CustomTabsClient client) {
        mClient = client;
        mClient.warmup(0L);
        if (mConnectionCallback != null) mConnectionCallback.onCustomTabsConnected();
    }

    @Override
    public void onServiceDisconnected() {
        mClient = null;
        mCustomTabsSession = null;
        if (mConnectionCallback != null) mConnectionCallback.onCustomTabsDisconnected();
    }

    /**
     * A Callback for when the service is connected or disconnected. Use those callbacks to
     * handle UI changes when the service is connected or disconnected.
     */
    public interface ConnectionCallback {
        /**
         * Called when the service is connected.
         */
        void onCustomTabsConnected();

        /**
         * Called when the service is disconnected.
         */
        void onCustomTabsDisconnected();
    }

    /**
     * To be used as a fallback to open the Uri when Custom Tabs is not available.
     */
    public interface CustomTabFallback {
        /**
         * @param activity The Activity that wants to open the Uri.
         * @param uri      The uri to be opened by the fallback.
         */
        void openUri(Activity activity, Uri uri);
    }

}

CustomTabsHelper.java

import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.net.Uri;
import android.text.TextUtils;
import android.util.Log;

import java.util.ArrayList;
import java.util.List;

/**
 * Helper class for Custom Tabs.
 */
public class CustomTabsHelper {
    private static final String TAG = "CustomTabsHelper";
    static final String STABLE_PACKAGE = "com.android.chrome";
    static final String BETA_PACKAGE = "com.chrome.beta";
    static final String DEV_PACKAGE = "com.chrome.dev";
    static final String LOCAL_PACKAGE = "com.google.android.apps.chrome";
    private static final String EXTRA_CUSTOM_TABS_KEEP_ALIVE =
            "android.support.customtabs.extra.KEEP_ALIVE";
    private static final String ACTION_CUSTOM_TABS_CONNECTION =
            "android.support.customtabs.action.CustomTabsService";

    private static String sPackageNameToUse;

    private CustomTabsHelper() {}

    public static void addKeepAliveExtra(Context context, Intent intent) {
        Intent keepAliveIntent = new Intent().setClassName(
                context.getPackageName(), KeepAliveService.class.getCanonicalName());
        intent.putExtra(EXTRA_CUSTOM_TABS_KEEP_ALIVE, keepAliveIntent);
    }

    /**
     * Goes through all apps that handle VIEW intents and have a warmup service. Picks
     * the one chosen by the user if there is one, otherwise makes a best effort to return a
     * valid package name.
     *
     * This is not threadsafe.
     *
     * @param context {@link Context} to use for accessing {@link PackageManager}.
     * @return The package name recommended to use for connecting to custom tabs related components.
     */
    public static String getPackageNameToUse(Context context) {
        if (sPackageNameToUse != null) return sPackageNameToUse;

        PackageManager pm = context.getPackageManager();
        // Get default VIEW intent handler.
        Intent activityIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.example.com"));
        ResolveInfo defaultViewHandlerInfo = pm.resolveActivity(activityIntent, 0);
        String defaultViewHandlerPackageName = null;
        if (defaultViewHandlerInfo != null) {
            defaultViewHandlerPackageName = defaultViewHandlerInfo.activityInfo.packageName;
        }

        // Get all apps that can handle VIEW intents.
        List resolvedActivityList = pm.queryIntentActivities(activityIntent, 0);
        List packagesSupportingCustomTabs = new ArrayList<>();
        for (ResolveInfo info : resolvedActivityList) {
            Intent serviceIntent = new Intent();
            serviceIntent.setAction(ACTION_CUSTOM_TABS_CONNECTION);
            serviceIntent.setPackage(info.activityInfo.packageName);
            if (pm.resolveService(serviceIntent, 0) != null) {
                packagesSupportingCustomTabs.add(info.activityInfo.packageName);
            }
        }

        // Now packagesSupportingCustomTabs contains all apps that can handle both VIEW intents
        // and service calls.
        if (packagesSupportingCustomTabs.isEmpty()) {
            sPackageNameToUse = null;
        } else if (packagesSupportingCustomTabs.size() == 1) {
            sPackageNameToUse = packagesSupportingCustomTabs.get(0);
        } else if (!TextUtils.isEmpty(defaultViewHandlerPackageName)
                && !hasSpecializedHandlerIntents(context, activityIntent)
                && packagesSupportingCustomTabs.contains(defaultViewHandlerPackageName)) {
            sPackageNameToUse = defaultViewHandlerPackageName;
        } else if (packagesSupportingCustomTabs.contains(STABLE_PACKAGE)) {
            sPackageNameToUse = STABLE_PACKAGE;
        } else if (packagesSupportingCustomTabs.contains(BETA_PACKAGE)) {
            sPackageNameToUse = BETA_PACKAGE;
        } else if (packagesSupportingCustomTabs.contains(DEV_PACKAGE)) {
            sPackageNameToUse = DEV_PACKAGE;
        } else if (packagesSupportingCustomTabs.contains(LOCAL_PACKAGE)) {
            sPackageNameToUse = LOCAL_PACKAGE;
        }
        return sPackageNameToUse;
    }

    /**
     * Used to check whether there is a specialized handler for a given intent.
     * @param intent The intent to check with.
     * @return Whether there is a specialized handler for the given intent.
     */
    private static boolean hasSpecializedHandlerIntents(Context context, Intent intent) {
        try {
            PackageManager pm = context.getPackageManager();
            List handlers = pm.queryIntentActivities(
                    intent,
                    PackageManager.GET_RESOLVED_FILTER);
            if (handlers == null || handlers.size() == 0) {
                return false;
            }
            for (ResolveInfo resolveInfo : handlers) {
                IntentFilter filter = resolveInfo.filter;
                if (filter == null) continue;
                if (filter.countDataAuthorities() == 0 || filter.countDataPaths() == 0) continue;
                if (resolveInfo.activityInfo == null) continue;
                return true;
            }
        } catch (RuntimeException e) {
            Log.e(TAG, "Runtime exception while getting specialized handlers");
        }
        return false;
    }

    /**
     * @return All possible chrome package names that provide custom tabs feature.
     */
    public static String[] getPackages() {
        return new String[]{"", STABLE_PACKAGE, BETA_PACKAGE, DEV_PACKAGE, LOCAL_PACKAGE};
    }
}

ServiceConnection.java

import android.content.ComponentName;
import android.support.customtabs.CustomTabsClient;
import android.support.customtabs.CustomTabsServiceConnection;

import java.lang.ref.WeakReference;

/**
 * Implementation for the CustomTabsServiceConnection that avoids leaking the
 * ServiceConnectionCallback
 */
public class ServiceConnection extends CustomTabsServiceConnection {
    // A weak reference to the ServiceConnectionCallback to avoid leaking it.
    private WeakReference mConnectionCallback;

    public ServiceConnection(ServiceConnectionCallback connectionCallback) {
        mConnectionCallback = new WeakReference<>(connectionCallback);
    }

    @Override
    public void onCustomTabsServiceConnected(ComponentName name, CustomTabsClient client) {
        ServiceConnectionCallback connectionCallback = mConnectionCallback.get();
        if (connectionCallback != null) connectionCallback.onServiceConnected(client);
    }

    @Override
    public void onServiceDisconnected(ComponentName name) {
        ServiceConnectionCallback connectionCallback = mConnectionCallback.get();
        if (connectionCallback != null) connectionCallback.onServiceDisconnected();
    }
}

ServiceConnectionCallback.java

import android.support.customtabs.CustomTabsClient;

/**
 * Callback for events when connecting and disconnecting from Custom Tabs Service.
 */
public interface ServiceConnectionCallback {
    /**
     * Called when the service is connected.
     * @param client a CustomTabsClient
     */
    void onServiceConnected(CustomTabsClient client);

    /**
     * Called when the service is disconnected.
     */
    void onServiceDisconnected();
}

WebviewFallback.java

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;

/**
 * A Fallback that opens a Webview when Custom Tabs is not available
 */
public class WebviewFallback implements CustomTabActivityHelper.CustomTabFallback {
    @Override
    public void openUri(Activity activity, Uri uri) {
        Intent intent = new Intent(activity, WebviewActivity.class);
        intent.putExtra(WebviewActivity.EXTRA_URL, uri.toString());
        activity.startActivity(intent);
    }
}

到目前为止,您应该可以打开Chrome自定义标签了.

如果发现任何问题,请告诉我.