質問編集履歴
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MainActivityのコードを全文載せました。
test
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File without changes
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test
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@@ -4,17 +4,143 @@
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訂正し、MainActivityのコードをすべて載せました。Fragmentを3つ用意しスワイプさせるためAdapterも使用しています。
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```java
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package com.example.viewpagertest;
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import android.net.Uri;
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import android.support.v4.app.Fragment;
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import android.support.v4.app.FragmentActivity;
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import android.support.v4.app.FragmentManager;
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import android.support.v4.app.FragmentStatePagerAdapter;
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import android.support.v4.view.ViewPager;
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import android.support.v7.app.AppCompatActivity;
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import android.os.Bundle;
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import android.util.Log;
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import android.widget.TextView;
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import java.util.Random;
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public class MainActivity extends FragmentActivity {
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private InfinateSwipeViewPagerAdapter mPagerAdapter;
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-
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private ViewPager mViewPager;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_main);
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mPagerAdapter = new InfinateSwipeViewPagerAdapter(getSupportFragmentManager());
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mViewPager = (ViewPager) findViewById(R.id.pager);
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mViewPager.setAdapter(mPagerAdapter);
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}
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@Override
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protected void onResume() {
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super.onResume();
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mViewPager.setCurrentItem(1);
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}
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class InfinateSwipeViewPagerAdapter extends FragmentStatePagerAdapter {
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public static final int MAX_PAGE_NUM = 10;
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private static final int OBJECT_NUM = 3;
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public InfinateSwipeViewPagerAdapter(FragmentManager fm) {
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super(fm);
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}
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@Override
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public Fragment getItem(int position) {
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Fragment fragment = null;
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Log.d("position", "positionは「" + position + "」");
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int diff = (position - (MAX_PAGE_NUM / 2)) % OBJECT_NUM;
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int index = (0 > diff) ? (OBJECT_NUM + diff) : diff;
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Log.d("index", "indexは「" + index + "」");
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switch (index) {
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case 0:
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fragment = new TestFragment1();
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break;
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case 1:
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fragment = new TestFragment2();
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break;
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case 2:
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fragment = new TestFragment3();
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break;
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}
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return fragment;
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}
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//以下がRandom関数を使っているところです。
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public class Ran {
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public class Ran {
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144
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public void main(String[] args) {
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20
146
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@@ -22,15 +148,9 @@
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148
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23
149
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int ran = r.nextInt(MAX_PAGE_NUM);
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24
150
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25
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-
//MAX_PAGE_NUMは作っているアプリの中で別のクラス内で指定してる変数、
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26
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-
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//ここではMAX_PAGE_NUM＝10としている
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-
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151
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TextView text;
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153
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text = (TextView) findViewById(R.id.text1);
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-
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//text1はFragment上に用意しているTextViewのID
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34
154
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155
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text.setText(Integer.toString(ran));
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36
156
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@@ -40,4 +160,22 @@
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40
160
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41
161
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162
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163
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+
@Override
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164
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+
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165
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public int getCount() {
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166
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return MAX_PAGE_NUM;
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168
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}
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170
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}
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}
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177
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179
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180
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+
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43
181
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```
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