Android app won't open after i install. But it can run in emulator

问题

I have exported my app from eclipse and installed it on my phone. After installation, I click open from package installer, but the installer force close. Afterwards, when I tried to launch the app, nothing happen after I click it. I click the app in app drawer but it return to home screen instead.

I am able to run in emulator and in debug mode when I connect my device via usb, but not when I export the apk to install.

Note that this is not the first app that I exported to install. Previous apps are working fine.

回答1:

I found the problem! I had declared the activity 2 times in the manifest with different properties, like:

<activity android:name=".myclass"></activity>

and

<activity android:name=".myclass" android:label="@string/app_name">
  <intent-filter>   
     <action android:name="android.intent.action.MAIN" /> 
     <category android:name="android.intent.category.LAUNCHER" /> 
  </intent-filter>
</activity>

Remove the unwanted one from the manifest and it will work.

回答2:

Check your android emulator version and the firmware version of the phone. If firmware version is not supported for that app you will be install from adb, but you cant start the app.

Check the settings to be able to install the unknown apps in
Settings->Applications and check box "Unknown Sources"

回答3:

Try to check on permission in Android Manifest. I was having the same problem earlier when i install a NFC app. I forget to give permission for NFC. After i gave the permission it works fine for me. Please check your AndroidManifest.

回答4:

I spent few days to identify the problem why it occurred .But I solved my problem this way- Modification in Android Manifest

<activity android:configChanges >
        <intent-filter android:label="@string/launcher_name">
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
            <I removed my code here that i added for reference to google play store for reference >

Remove the unwanted one from the manifest and it will work.

回答5:

Try to search errors in your Android manifest, i have the same problem and the problem was the 'R' in the category LAUNCHER are in lower case.

like this:

<category android:name="android.intent.category.LAUNCHEr" />

to solve it, simple:

<category android:name="android.intent.category.LAUNCHER" />

回答6:

android:theme="@style/AppTheme.NoActionBar">

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

回答7:

My Manifest looked like this. Those that need help and have a similar manifest look bellow.

<activity android:name=".login.activities.SplashScreenActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
                <action android:name="android.intent.action.VIEW"/>
                <category android:name="android.intent.category.DEFAULT"/>
                <category android:name="android.intent.category.BROWSABLE"/>
                <data
                    android:host="example.com"
                    android:scheme="https"/>
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

You just need to remove the

< data>

element in the intent-filler and it should work.

来源：https://stackoverflow.com/questions/9410378/android-app-wont-open-after-i-install-but-it-can-run-in-emulator

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