How to start and App Chooser

问题:

The task of this application is to implicitly activate a separate application to view the URL, “http:// www.google.com”. So, App Chooser should appear and let me choose between at least two browsers: the default one, which will show me the www.google.com site, and another simple "browser", which just shows me the url. The problem is - App chooser doesn't appear, when i use implicit activity. Probably I wrote wrong intent filters for second "simple browser".

private void startImplicitActivation() {      Log.i(TAG, "Entered startImplicitActivation()");      // TODO - Create a base intent for viewing a URL      // (HINT:  second parameter uses parse() from the Uri class)     Uri adress = Uri.parse(URL);     Intent intentUrlView = new Intent(Intent.ACTION_VIEW, adress);      // TODO - Create a chooser intent, for choosing which Activity     // will carry out the baseIntent. Store the Intent in the      // chooserIntent variable below. HINT: using the Intent class'      // createChooser())     Intent chooserIntent = Intent.createChooser(intentUrlView, CHOOSER_TEXT);     //chooserIntent = null;      Log.i(TAG,"Chooser Intent Action:" + chooserIntent.getAction());     // TODO - Start the chooser Activity, using the chooser intent     if (intentUrlView.resolveActivity(getPackageManager()) != null) {         startActivity(chooserIntent);     } } 

MANIFEST

 <manifest xmlns:android="http://schemas.android.com/apk/res/android"     package="course.labs.intentslab.mybrowser"     android:versionCode="1"     android:versionName="1.0" >      <uses-sdk         android:minSdkVersion="13"         android:targetSdkVersion="18" />      <application         android:allowBackup="true"         android:icon="@drawable/ic_launcher"         android:label="@string/app_name"         android:theme="@style/AppTheme" >         <activity             android:name=".MyBrowserActivity"             android:label="@string/app_name" >             <intent-filter>                 <action android:name="android.intent.action.MAIN" />                  <category android:name="android.intent.category.LAUNCHER" />             </intent-filter>              <!-- TODO - Add necessary intent filter information so that this                             Activity will accept Intents with the                              action "android.intent.action.VIEW" and with an "http"                              schemed URL -->         <action android:name="android.intent.action.VIEW" />         <data android:scheme="http" />         <category android:name="android.intent.category.BROWSABLE" />         </activity>     </application> 

回答1:

Seriously, you have a GUI editor for manifest.

This

<action android:name="android.intent.action.VIEW" /> <data android:scheme="http" /> <category android:name="android.intent.category.BROWSABLE" /> 

should placed in <intent-filter> tag, as you already can see in your manifest. Like this:

<activity     android:name=".MyBrowserActivity"     android:label="@string/app_name" >      <intent-filter>         <action android:name="android.intent.action.MAIN" />          <category android:name="android.intent.category.LAUNCHER" />     </intent-filter>          <!-- TODO - Add necessary intent filter information so that this                         Activity will accept Intents with the                          action "android.intent.action.VIEW" and with an "http"                          schemed URL -->     <intent-filter>         <action android:name="android.intent.action.VIEW" />         <data android:scheme="http" />         <category android:name="android.intent.category.BROWSABLE" />     </intent-filter>  </activity> 

---

That is how it done in default browser:

        <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:scheme="http" />             <data android:scheme="https" />             <data android:scheme="about" />             <data android:scheme="javascript" />         </intent-filter>         <intent-filter>             <action android:name="android.intent.action.VIEW" />             <category android:name="android.intent.category.BROWSABLE" />             <category android:name="android.intent.category.DEFAULT" />             <data android:scheme="http" />             <data android:scheme="https" />             <data android:scheme="inline" />             <data android:scheme="file" />             <data android:mimeType="text/html" />             <data android:mimeType="text/plain" />             <data android:mimeType="application/xhtml+xml" />             <data android:mimeType="application/vnd.wap.xhtml+xml" />         </intent-filter> 

回答2:

Seems like the Adam Porter's Third Week Assignment of Programming mobile Application for Android HandHeld systems. Anyway, I hope you have your solution inside the AndroidManifest.xml you would need to add three more intent filters.

<action android:name="android.intent.action.VIEW" /> <category android:name="android.intent.category.DEFAULT" /> <data android:scheme="http" /> 

Further, if you were not able to run the AndroidUnit tests,

make sure you have done something similar to this in the ActionListener of the implicit button call.

Intent baseIntent = new Intent(Intent.ACTION_VIEW);         baseIntent.setData(Uri.parse(URL));  Intent chooserIntent = Intent.createChooser(baseIntent, "Select Application"); 

Coursera already has a mailing list. Please use that.

回答3:

Easy implementation of multiple actions app chooser:

Intent phoneCall=new Intent(Intent.ACTION_DIAL,Uri.fromParts("tel",contactNumber,null));             //Intent sms=new Intent(Intent.ACTION_VIEW,Uri.parse("sms:"+contactNumber));             Intent whatsapp=new Intent(Intent.ACTION_SENDTO, Uri.parse("smsto:"+contactNumber));             Uri.Builder builder = CalendarContract.CONTENT_URI.buildUpon();             builder.appendPath("time");             ContentUris.appendId(builder, Calendar.getInstance().getTimeInMillis());             Intent calendarIntent = new Intent(Intent.ACTION_VIEW).setData(builder.build());              Intent chooser=Intent.createChooser(whatsapp,"chooser??");//default action             chooser.putExtra(Intent.EXTRA_INITIAL_INTENTS,new Intent[]{phoneCall,calendarIntent});//additional actions             startActivity(chooser); 

回答4:

Here's how I am doing:

Step 1: First in the strings,

<string name="webklink">&lt;a href="http://www.google.com">SomeLink&lt;/a></string> 

Step 2: My Layout:

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:gravity="center"     android:orientation="vertical" >      <TextView         android:id="@+id/textView1"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_gravity="center"         android:text="@string/webklink"         android:textAppearance="?android:attr/textAppearanceLarge" />  </RelativeLayout> 

Step 3: Getting the link from the strings.

public class OpenWeb extends Activity {       @Override     protected void onCreate(Bundle savedInstanceState) {         // TODO Auto-generated method stub         super.onCreate(savedInstanceState);         setContentView(R.layout.webopen);          TextView someLink = (TextView)findViewById(R.id.textView1);         if(someLink!=null){              someLink.setMovementMethod(LinkMovementMethod.getInstance());             someLink.setText(Html.fromHtml(getResources().getString(R.string.webklink)));         }      } } 

Hope this helps..:)

回答5:

You have to run lab3a_MyBrowser before you run lab3a_IntentsLab, so that the browser gets installed on your phone. Then it will be visible to your chooser.

文章来源: How to start and App Chooser