lorena lorena - 13 days ago 9
Android Question

Crashes on StartActivitity() Android Apps

I am getting the error "Unable to start activity ComponentInfo".

When I call start_salud function:

public void start_salud(View view) {
Intent intent = new Intent(MainActivity.this, salud.class);
startActivity(intent);
}


It crashes on
startActivity(intent)


I call it from
android:onClick="start_salud"
.

salud_class:

package com.alertavecino.alertavecino;

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

import java.util.ArrayList;

public class salud extends AppCompatActivity {
ArrayList<String> listDiseases;

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


Dubbing results:

if (mResolvedMethod == null) { // <-- This statment is true
resolveMethod(mHostView.getContext(), mMethodName);
}

try {
mResolvedMethod.invoke(mResolvedContext, v); // <-- Here it's crashes
} catch (IllegalAccessException e) {
throw new IllegalStateException(
"Could not execute non-public method for android:onClick", e);
} catch (InvocationTargetException e) {
throw new IllegalStateException(
"Could not execute method for android:onClick", e);
}


Manifest.xml:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.alertavecino.alertavecino">

<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="Alerta Vecino!"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />

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

</manifest>


Cat Log:

11-25 20:17:31.924 29226-29226/com.alertavecino.alertavecino E/Zygote: MountEmulatedStorage()
11-25 20:17:31.924 29226-29226/com.alertavecino.alertavecino E/Zygote: v2
11-25 20:17:31.944 29226-29226/com.alertavecino.alertavecino E/SELinux: [DEBUG] get_category: variable seinfo: default sensitivity: NULL, cateogry: NULL

Answer

You need to declare your activity in the manifest in order for it to be able to be started.

Add the following to your manifest.xml file inside the <application> tags:

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

This will allow your activity to be started, and also make the activity launchable from the device app list.