เนื่องจากใน android studio version ใหม่จะใช้ fragment layout มาช่วยในส่วนของ Activity ทำให้การเขียนโค้ดในปุ่ม button เพื่อเปลี่ยนหน้าหรือเปลี่ยน activity ต้องย้ายไปทำในส่วนของ fragment แทน
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
final Button btnFlag=(Button) rootView.findViewById(R.id.buttonflagment);
btnFlag.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent newActivityReminder=new Intent();
newActivityReminder.setClass(getActivity(),MainActivityReminder.class);
newActivityReminder.putExtra("index","test");//ส่งค่าตัวหลังเป็น Value
startActivity(newActivityReminder);
}
});
return rootView;
}
}
อันนี้โค้ดทั้งหมดในหน้า MainActivity
package com.medicinereminder;
import android.app.AlertDialog;
import android.content.Intent;
import android.os.Handler;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.os.Build;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.Toast;
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment())
.commit();
}
/*
final AlertDialog.Builder adb = new AlertDialog.Builder(this);
final Button btn1 = (Button) findViewById(R.id.buttonnew);
// Perform action on click
btn1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
AlertDialog ad = adb.create();
ad.setMessage("Button 2 Event");
ad.show();
}
});
*/
// Button1
final Button btn1 = (Button) findViewById(R.id.buttonnew);
// Button2 open Reminder
final ImageButton btnReminder=(ImageButton)findViewById(R.id.buttonimgreminder);
// Perform action on click
btn1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Open Form 2
Intent newActivity = new Intent(MainActivity.this,MainActivity2.class);
startActivity(newActivity);
}
});
btnReminder.setOnClickListener(new View.OnClickListener(){
public void onClick(View v){
//open Reminder
Intent newActivityReminder=new Intent(MainActivity.this,MainActivityReminder.class);
startActivity(newActivityReminder);
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
switch (item.getItemId()) {
case R.id.action_settings:
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
final Button btnFlag=(Button) rootView.findViewById(R.id.buttonflagment);
btnFlag.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent newActivityReminder=new Intent();
newActivityReminder.setClass(getActivity(),MainActivityReminder.class);
newActivityReminder.putExtra("index","test");//ส่งค่าตัวหลังเป็น Value
startActivity(newActivityReminder);
}
});
return rootView;
}
}
}
อันนี้หน้า activity_main.xml มีสร้างปุ่ม button ธรรมดาเพื่อให้เห็นความแตกต่างด้วย แต่ถ้าทำจริงไม่ควรสร้างอะไรในไฟล์นี้ไปสร้างใน fragment แทนดีกว่า
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
tools:ignore="MergeRootFrame" >
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="36dp"
android:background="#CCFFFF">
<TextView
android:layout_width="fill_parent"
android:layout_height="27dp"
android:text="Welcome to Medicine Reminder"
android:id="@+id/textTitle"
android:layout_gravity="center_horizontal|top"
android:layout_margin="10dp"
android:textAlignment="center"
android:textSize="@dimen/abc_action_bar_subtitle_text_size"
android:textStyle="bold" />
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="130dp"
android:layout_height="400dp"
android:layout_gravity="center"
android:background="#ffffff">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Button"
android:id="@+id/buttonnew"
android:layout_gravity="center_horizontal|top"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="51dp"
android:text="New Text"
android:id="@+id/textView"
android:layout_gravity="center_horizontal|top" />
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="130dp"
android:layout_height="400dp"
android:layout_gravity="right|center_vertical"
android:background="#ffffff">
</LinearLayout>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Go to NFC Update"
android:id="@+id/button"
android:layout_gravity="center_horizontal|bottom" />
<LinearLayout
android:orientation="vertical"
android:layout_width="130dp"
android:layout_height="400dp"
android:layout_gravity="left|top"
android:weightSum="1"
android:background="#ffffff">
<ImageButton
android:layout_width="91dp"
android:layout_height="wrap_content"
android:id="@+id/buttonimgreminder"
android:layout_gravity="center_horizontal"
android:adjustViewBounds="false"
android:background="@drawable/main_reminder"
android:layout_weight="0.18" />
<TextView
android:layout_width="wrap_content"
android:layout_height="27dp"
android:text="New Text"
android:id="@+id/textView2"
android:layout_gravity="center_horizontal|top" />
</LinearLayout>
</FrameLayout>
หน้า fragment_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context=".MainActivity$PlaceholderFragment">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button on Flagment"
android:id="@+id/buttonflagment"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:singleLine="false" />
</RelativeLayout>