第一步 先写布局,在Android_main. :
<RelativeLayout ns:android=\"http://schemas.android.com/apk/res/android\"
ns:tools=\"http://schemas.android.com/tools\"
android:layout_width=\"match_parent\"
android:layout_height=\"match_parent\" >
<android.support.v4.view.ViewPager
android:id=\"@+id/pager\"
android:layout_width=\"match_parent\"
android:layout_height=\"match_parent\"
/>
<Button
android:id=\"@+id/button1\"
android:layout_width=\"wrap_content\"
android:layout_height=\"wrap_content\"
android:layout_centerHorizontal=\"true\"
android:layout_centerVertical=\"true\"
android:text=\"立即体验\" />
</RelativeLayout>
先写布局,在Android_two. :
<RelativeLayout ns:android=\"http://schemas.android.com/apk/res/android\"
ns:tools=\"http://schemas.android.com/tools\"
android:layout_width=\"match_parent\"
android:layout_height=\"match_parent\"
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=\".TwoActivity\" >
<TextView
android:layout_width=\"wrap_content\"
android:layout_height=\"wrap_content\"
android:text=\"@string/hello_world\" />
</RelativeLayout>
第二步 在MainAntivity.java里边写:
package com.qy.ydy;
import java.util.ArrayList;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.Menu;
import android.view.View;
import android.view.View. Listener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
public class MainActivity extends Activity {
private ViewPager pager;
private Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 1找控件
pager = (ViewPager) findViewById(R.id.pager);
button = (Button) findViewById(R.id.button1);
button.setVisibility(View.GONE);
button.set Listener(new Listener() {
@Override
public void (View v) {
// 跳转页面
startActivity(new Intent(MainActivity.this, TwoActivity.class));
//注意这个代码很重要 价值5分
finish();
}
});
// 2数据
int arr[] = { R.drawable.a1, R.drawable.a2, R.drawable.a3,
R.drawable.a4 };
final ArrayList<ImageView> list = new ArrayList<ImageView>();
for (int i = 0; i < arr.length; i++) {
// 创建ImageView
ImageView imageView = new ImageView(MainActivity.this);
imageView.setImageResource(arr[i]);
// 添加到集合
list.add(imageView);
}
// 3.适配器
pager.setAdapter(new PagerAdapter() {
@Override
public int getCount() {
// TODO Auto-generated method stub
return list.size();
}
@Override
public boolean isViewFrom (View arg0, arg1) {
// TODO Auto-generated method stub
return arg0 == arg1;
}
@Override
public instantiateItem(ViewGroup container, int position) {
ImageView imageView = list.get(position);
// 添加到viewpager中
container.addView(imageView);
return imageView;
}
@Override
public void destroyItem(ViewGroup container, int position,
) {
container.removeView((View) );
}
});
// 4.页面切换事件
pager.setOnPageChangeListener(new OnPageChangeListener() {
@Override
public void onPageSelected(int arg0) {
// 页面切换
// 为啥-1???
// 因为下标是从零开始的,而长度是从一开始的
// 判断是不是最后一页,如果是就显示按钮,如果不是就隐藏按钮
if (arg0 == list.size() - 1) {
button.setVisibility(View.VISIBLE);
} else {
button.setVisibility(View.GONE);
}
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// 页面滚动
}
@Override
public void onPageScrollStateChanged(int arg0) {
// 页面状态改变
}
});
}
}
在第二个页面TwoActivity.java里边写:
package com.qy.ydy;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
public class TwoActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_two);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.two, menu);
return true;
}
}
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