In build.gradle file
minSDkversion 10 modified version andriod version
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Replace the main screen, the app / src / main / AndriodManifes.xml
<activity android:name=".login2Activity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</intent-filter>
</activity>