package com.example.androidviewpagerapp;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.support.v7.app.ActionBarActivity;
import android.text.method.ScrollingMovementMethod;
import android.graphics.Color;
import android.graphics.Typeface;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends ActionBarActivity {
ViewPager viewPager;
MyPagerAdapter myPagerAdapter;
TextView textMsg;
Button btnToFirst, btnToLast;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textMsg = (TextView)findViewById(R.id.msg);
textMsg.setMovementMethod(new ScrollingMovementMethod());
viewPager = (ViewPager) findViewById(R.id.myviewpager);
myPagerAdapter = new MyPagerAdapter();
viewPager.setAdapter(myPagerAdapter);
viewPager.setOnPageChangeListener(myOnPageChangeListener);
btnToFirst = (Button)findViewById(R.id.tofirst);
btnToLast = (Button)findViewById(R.id.tolast);
btnToFirst.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
viewPager.setCurrentItem(0);
}});
btnToLast.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
int indexLast = viewPager.getAdapter().getCount() - 1;;
viewPager.setCurrentItem(indexLast);
}});
}
OnPageChangeListener myOnPageChangeListener =
new OnPageChangeListener(){
@Override
public void onPageScrollStateChanged(int state) {
//Called when the scroll state changes.
}
@Override
public void onPageScrolled(int position,
float positionOffset, int positionOffsetPixels) {
//This method will be invoked when the current page is scrolled,
//either as part of a programmatically initiated smooth scroll
//or a user initiated touch scroll.
}
@Override
public void onPageSelected(int position) {
//This method will be invoked when a new page becomes selected.
textMsg.append("onPageSelected:" + position + "\n");
}};
private class MyPagerAdapter extends PagerAdapter {
int NumberOfPages = 5;
int[] res = { android.R.drawable.ic_dialog_alert,
android.R.drawable.ic_menu_camera,
android.R.drawable.ic_menu_compass,
android.R.drawable.ic_menu_directions,
android.R.drawable.ic_menu_gallery };
int[] backgroundcolor = { 0xFF101010, 0xFF202020, 0xFF303030,
0xFF404040, 0xFF505050 };
@Override
public int getCount() {
return NumberOfPages;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
textMsg.append("instantiateItem:" + position + "\n");
TextView textView = new TextView(MainActivity.this);
textView.setTextColor(Color.WHITE);
textView.setTextSize(30);
textView.setTypeface(Typeface.DEFAULT_BOLD);
textView.setText(String.valueOf(position));
ImageView imageView = new ImageView(MainActivity.this);
imageView.setImageResource(res[position]);
LayoutParams imageParams = new LayoutParams(
LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
imageView.setLayoutParams(imageParams);
LinearLayout layout = new LinearLayout(MainActivity.this);
layout.setOrientation(LinearLayout.VERTICAL);
LayoutParams layoutParams = new LayoutParams(
LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
layout.setBackgroundColor(backgroundcolor[position]);
layout.setLayoutParams(layoutParams);
layout.addView(textView);
layout.addView(imageView);
final int page = position;
layout.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(MainActivity.this,
"Page " + page + " clicked", Toast.LENGTH_LONG)
.show();
}
});
container.addView(layout);
return layout;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((LinearLayout) object);
textMsg.append("destroyItem:" + position + "\n");
}
}
}
<LinearLayout 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:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.androidviewpagerapp.MainActivity" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:autoLink="web"
android:text="http://android-er.blogspot.com/"
android:textStyle="bold" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="100dp"
android:orientation="vertical" >
<TextView
android:id="@+id/msg"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="bottom" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<Button
android:id="@+id/tofirst"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="to First" />
<Button
android:id="@+id/tolast"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="to Last" />
</LinearLayout>
<android.support.v4.view.ViewPager
android:id="@+id/myviewpager"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
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