why the app is not running on my cellphone?

debugcn Published at Dev

Bolandian Eran

I'm debugging my app and for some reason it does not load the app to my smartphone. i have no idea why it happenes. it shows that there are no earrors and succsessfull launched, but nothing happenes.

This is the activity

public class TabHostMain extends TabActivity {

TabHost tabHost;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_tab_host_main);


    tabHost = getTabHost();

    TabHost.TabSpec ts1 = tabHost.newTabSpec("main");
    ts1.setIndicator("Main");
    ts1.setContent(new Intent(this, Main.class));
    tabHost.addTab(ts1);

    TabHost.TabSpec ts2 = tabHost.newTabSpec("GPS");
    ts2.setIndicator("GPS");
    ts2.setContent(new Intent(this, GPS.class));
    tabHost.addTab(ts2);


    TabHost.TabSpec ts3 = tabHost.newTabSpec("Info");
    ts3.setIndicator("Info");
    ts3.setContent(new Intent(this, Info.class));
    tabHost.addTab(ts3);

}

}

this is the manifest

   <?xml version="1.0" encoding="utf-8"?>

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".Main" />
    <activity android:name=".GPS" />
    <activity android:name=".Info" />
    <activity android:name=".TabHostMain"/>
    <activity android:name=".Main2Activity"></activity>

</application>

Arpit Ratan

This is because there is no launched activity declared in your Android Manifest.

Make the following change in your android manifest and it will work.

<activity android:name=". Main2Activity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

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