How can I start MAIN activity with the help of ?

Question

When I declare my main activity in this maner:

<activity android:name=".MyActivity"
          android:configChanges="orientation|keyboardHidden"
          android:windowSoftInputMode="stateHidden"
          android:screenOrientation="portrait">
    <intent-filter>
          <action android:name="android.intent.action.MAIN"/>
          <action android:name="com.package.name.MyActivity"/>
          <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>

then I get an error No Activity found to handle Intent { act=com.package.name.MyActivity flg=0x24000000 } when I am using this code:

Intent intent = new Intent("com.package.name.MyActivity");
intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP);
context.startActivity(intent);

If do not use Intent i = new Intent(this, MyActivity.class); how can I do this with the help of action for <intent-filter>

Didn't help:

 <intent-filter>
      <action android:name="android.intent.action.MAIN"/>
      <action android:name="com.package.name.VIEW"/>
      <category android:name="android.intent.category.LAUNCHER" />
 </intent-filter>

code:

Intent intent = new Intent("com.package.name.VIEW");
intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP);
context.startActivity(intent);

Create a custom 'action' such as `com.package.name.ACTION_VIEW` and as Jeffery Blatman advises, remove the 'action' for `com.package.name.MyActivity`. You then just use your custom action to start the `Activity`. — Squonk, Jul 28 '12 at 17:28
I've changed the code, but it didn't help me. where I made a mistake? — Sviatoslav, Jul 28 '12 at 18:13

Vincent Mimoun-Prat · Accepted Answer · 2012-07-28T20:57:20.963

8

Try to specify two intent filters:

<activity android:name=".MyActivity"
          android:configChanges="orientation|keyboardHidden"
          android:windowSoftInputMode="stateHidden"
          android:screenOrientation="portrait">
    <intent-filter>
          <action android:name="android.intent.action.MAIN"/>
          <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
    <intent-filter>
          <action android:name="com.package.name.MyAction"/>
          <category android:name="android.intent.category.DEFAULT"/>
    </intent-filter>
</activity>

Then you can start the activity using the action name:

Intent intent = new Intent("com.package.name.MyAction");
context.startActivity(intent);

or the class name:

Intent intent = new Intent(context, MyActivity.class);
context.startActivity(intent);

edited Jul 28 '12 at 20:57

answered Jul 28 '12 at 18:27

Vincent Mimoun-Prat

28,208
16
81
124

`Intent intent = new Intent("com.package.name.MyAction"); context.startActivity(intent);` didn't help (_No Activity found to handle Intent_) :( Using class name work, but I want to use **action name** – Sviatoslav Jul 28 '12 at 18:40
@Svyatoslav: I am very confident that the answer given here is correct, and that you implemented the solution incorrectly. – CommonsWare Jul 28 '12 at 18:55
5

@CommonsWare I found that it works by using **action name** when second `` contains else. – Sviatoslav Jul 28 '12 at 19:50
4

@Svyatoslav: Ah, yes, my apologies. `startActivity()` always adds `CATEGORY_DEFAULT` to an `Intent` if there is no other category specified. Hence, an `` for an `` always needs a ``, whether `DEFAULT` or something else. – CommonsWare Jul 28 '12 at 19:54
1

Answer edited to add the default category. Sorry for having forgotten that. – Vincent Mimoun-Prat Jul 28 '12 at 20:57

score 1 · Answer 2 · answered Jul 28 '12 at 17:25

1

the name attribute in the action tag is the name of the action, not the name of your activity. remove the line,

  <action android:name="com.package.name.MyActivity"/>

since the intent filter tag is under your activity's tag, the system already understands that it's applied to that activity.

answered Jul 28 '12 at 17:25

Jeffrey Blattman

22,176
9
79
134

So I'll have two lines ` `. What does I must wright in java code? – Sviatoslav Jul 28 '12 at 18:12
you do not need to write anything in java. that intent filter will show a launcher icon linked to that activity. – Jeffrey Blattman Jul 29 '12 at 02:36

score 0 · Answer 3 · answered Jul 28 '12 at 17:31

Your class name isn't com.package.name.MyActivity, it's com.package.name.general.MyActivity.

An easy way to avoid this mistake is to create your new Intent using a class instead of a package name. You can use auto-complete to fill in the right class.

You say you don't want to create the Intent by specifying the class. I wonder why not -- I think it's a good way to go.

How can I start MAIN activity with the help of ?

3 Answers3

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