CODEWITHSUNDEEP
androidandroid-activitystartup
RBT
RBT

Reputation: 25877

Unable to launch a new activity as main activity

Initially my Android project had only one activity named MainActivity. Then, I added a new activity named ChildActivity into my project. I'm trying to launch my new activity as startup activity when app gets launched. I changed AndroidManifest.xml file to achieve it. I moved the entire intent-filter tag from MainActivity to ChildActivity as shown below:

<activity android:name=".MainActivity">

        </activity>

        <activity android:name=".ChildActivity" >

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

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

        </activity>

Layout file of ChildActivity looks like this. I'm trying to show a TextView on the new activity I've just added:

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".ChildActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/tv_display"
        android:text="Hello this is Rasik!"/>

</android.support.constraint.FrameLayout>

ChildActivity.java file:

package com.example.android.explicitintent;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;

public class ChildActivity extends AppCompatActivity {

    private TextView mDisplayText;

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

Whenever I try to debug my app in Android AVD, nothing happens. It seems my app is crashing at start up. Can anyone help me in diagnosing the root cause?

Upvotes: 0

Views: 521

Answers (5)

Neeraj vishwakarma
Neeraj vishwakarma

Reputation: 117

The Root layout android.support.constraint.FrameLayout you are using does not exist. Check out this link Android Developer guide.

Your Root layout can be:

There are many layouts available which you can use based on your need.

Upvotes: 1

Tung Tran
Tung Tran

Reputation: 2955

You used wrong layout. Just convert android.support.constraint.FrameLayout to FrameLayout. Or convert to default android.support.constraint.ConstraintLayout

<FrameLayout
    ...>

    <TextView
    ...
        />
</FrameLayout>

Upvotes: 1

Abner Esc&#243;cio
Abner Esc&#243;cio

Reputation: 2785

The class android.support.constraint.FrameLayout not exists. Try LinearLayout, FrameLayout, android.support.constraint.ConstraintLayour or others

Upvotes: 2

Basil jose
Basil jose

Reputation: 780

please try this ! 

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 
 xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/tv_display"
        android:text="Hello this is Rasik!"/>

</FrameLayout>

i think there is issue with root framelayout

Upvotes: 2

Jose Chavez
Jose Chavez

Reputation: 1

I had seen a similar issue in another post. Just off the bat, it seems like your child activity is not within the enclosing terms of the ".MainActivity."

Put the child activity into the brackets of the ".MainActivity", in between the <activity android:name=".MainActivity"> </actvitiy>. Hopefully that makes it run better. If that doesn't work, start the child activity during the onCreate() method of the MainActivity.

Upvotes: 0

Related Questions