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import android.app.Activity;
import android.os.Bundle;
import android.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import com.days.fragment.MyView;
public class Main extends FragmentActivity {
FragmentManager manager;
FragmentTransaction transaction;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
manager = getSupportFragmentManager();
transaction = manager.beginTransaction();
MyView myView = new MyView();
transaction.replace(R.id.main,myView);
transaction.commit();
}
}
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.TextView;
import com.days.R;
import com.days.adapter.MyAdapter;
import java.util.ArrayList;
import java.util.List;
public class MyView extends Fragment implements View.OnClickListener{
ViewPager mViewPager;
List<Fragment> frag_list=new ArrayList<Fragment>();
Button page_1_btn,page_2_btn,page_3_btn,page_4_btn,page_5_btn;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.view, null);
getView();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT){
//透明状态栏
getActivity().getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
}
initView();
initViewPage();
initEvent();
return view;
}
private void initEvent() {
page_1_btn.setOnClickListener(this);
page_2_btn.setOnClickListener(this);
page_3_btn.setOnClickListener(this);
mViewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
/**
*ViewPage左右滑动时
*/
@Override
public void onPageSelected(int arg0) {
int currentItem = mViewPager.getCurrentItem();
switch (currentItem) {
case 0:
resetImg();
page_1_btn.setBackgroundResource(R.drawable.health2);
break;
case 1:
resetImg();
page_2_btn.setBackgroundResource(R.drawable.outdoor2);
break;
case 2:
resetImg();
page_3_btn.setBackgroundResource(R.drawable.note2);
break;
default:
break;
}
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public void onPageScrollStateChanged(int arg0) {
}
});
}
/**
* 初始化设置
*/
private void initView() {
// 初始化三个按钮
page_1_btn = (Button)getView().findViewById(R.id.page_1_btn);
page_2_btn = (Button)getView().findViewById(R.id.page_2_btn);
page_3_btn = (Button)getView().findViewById(R.id.page_3_btn);
}
/**
* 初始化ViewPage
*/
private void initViewPage() {
// 初妈化四个布局
List<Fragment> fragments=new ArrayList<Fragment>();
fragments.add(new Pager_1());
fragments.add(new Pager_2());
fragments.add(new Pager_3());
MyAdapter adapter = new MyAdapter(getActivity().getSupportFragmentManager(), fragments);
//设定适配器
mViewPager = (ViewPager)getView().findViewById(R.id.main_pager);
mViewPager.setAdapter(adapter);
}
/**
* 判断哪个要显示,及设置按钮图片
*/
@Override
public void onClick(View arg0) {
switch (arg0.getId()) {
case R.id.page_1_btn:
mViewPager.setCurrentItem(0);
resetImg();
page_1_btn.setBackgroundResource(R.drawable.health2);
break;
case R.id.page_2_btn:
mViewPager.setCurrentItem(1);
resetImg();
page_1_btn.setBackgroundResource(R.drawable.outdoor2);
break;
case R.id.page_3_btn:
mViewPager.setCurrentItem(2);
resetImg();
page_1_btn.setBackgroundResource(R.drawable.note2);
break;
default:
break;
}
}
/**
* 把所有图片变暗
*/
private void resetImg() {
page_1_btn.setBackgroundResource(R.drawable.health);
page_2_btn.setBackgroundResource(R.drawable.outdoor);
page_3_btn.setBackgroundResource(R.drawable.note);
}
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/main"
android:name="com.days.fragment.MyView"
/>
</LinearLayout>
<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:background="#ffffff">
<android.support.v4.view.ViewPager
android:id="@+id/main_pager"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</android.support.v4.view.ViewPager>
"
<include layout="@layout/bottom" />
</LinearLayout>
public class Main extends FragmentActivity {
FragmentManager manager;
FragmentTransaction transaction;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
manager = getSupportFragmentManager();
transaction = manager.beginTransaction();
MyView myView = new MyView();
transaction.replace(R.id.main,myView);
transaction.commit();
}
}
[/quote]
把你的log全贴出来,不要只给一点
public class Main extends FragmentActivity {
FragmentManager manager;
FragmentTransaction transaction;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
manager = getSupportFragmentManager();
transaction = manager.beginTransaction();
MyView myView = new MyView();
transaction.replace(R.id.main,myView);
transaction.commit();
}
}
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.days/com.days.Main}: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference