I'm still learning how to code Android apps using Android Studio. This is the app I'm trying to write to practice having more than one activity. Everytime I run it it says "Unfortunately Multiactivity has stopped" whenever I type something in the EditText in the main activity page and click the button.
Perhaps you guys can help me in finding the error?
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="rinorapps.com.multiactivity">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="rinorapps.com.multiactivity.MainActivity"/>
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".SecondActivity">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="rinorapps.com.multiactivity.MainActivity"/>
</activity>
</application>
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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=".MainActivity">
<TextView
android:id="@+id/main_activity_title"
android:layout_width="match_parent"
android:layout_height="53dp"
android:gravity="center"
android:text="@string/main_activity_title_text"
android:textSize="18sp" />
<Button
android:id="@+id/main_activity_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="@string/main_activity_button_text"
android:onClick="main_activity_button_listener"/>
<EditText
android:id="@+id/main_edit"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginTop="70dp"
android:ems="10"
android:inputType="textPersonName"
android:text="@string/main_edit_text" />
mainactivity.java
package rinorapps.com.multiactivity;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends AppCompatActivity {
public static final String EXTRA_MESSAGE =
"rinorapps.com.multiactivity.extra.MESSAGE";
private Button main_activity_button;
private EditText main_edit;
@Override
protected void onCreate(Bundle savedInstanceState) {
main_activity_button = findViewById(R.id.main_activity_button);
main_edit = findViewById(R.id.main_edit);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void main_activity_button_listener(View view) {
Intent intent = new Intent(this, SecondActivity.class);
String message = main_edit.getText().toString();
intent.putExtra(EXTRA_MESSAGE, message);
startActivity(intent);
}
}
Second_activity.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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=".SecondActivity">
<TextView
android:id="@+id/second_activity_title"
android:layout_width="match_parent"
android:layout_height="53dp"
android:gravity="center"
android:text="@string/second_activity_title_text"
android:textSize="18sp" />
<EditText
android:id="@+id/second_edit"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="138dp"
android:ems="10"
android:inputType="textPersonName"
android:text="@string/second_edit_text"/>
</RelativeLayout>
SecondActivity.java
package rinorapps.com.multiactivity;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.EditText;
public class SecondActivity extends AppCompatActivity {
private EditText second_edit;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.second_activity);
Intent intent = getIntent();
String message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);
second_edit = findViewById(R.id.second_edit);
second_edit.setText(message);
}
}
And then the logcat, which suggests the problem lies in the onClick but that's all I could deduce so far,
1881-1881/rinorapps.com.multiactivity
E/AndroidRuntime: FATAL EXCEPTION: main
Process: rinorapps.com.multiactivity, PID: 1881
java.lang.IllegalStateException: Could not execute method for android:onClick"
Pasting the whole logcat here seems to mess up the Code format on this website, apologies.
This is the strings.xml file if it helps?
<resources>
<string name="app_name">Multiactivity</string>
<string name="main_activity_title_text">Main Activity</string>
<string name="main_activity_button_text">Second</string>
<string name="second_activity_title_text">Second Activity</string>
<string name="main_edit_text">Type here</string>
<string name="second_edit_text">Hello</string>
</resources>
I'm not sure if this is the right place, or if I'm doing this properly. I'm studying alone in Kuantan in front of my computer and I have no one around me to ask for help.
