Android 将教程代码集成到生成的NavigationView代码中
学习安卓,现在我遇到了一个简单的问题 我用菜单幻灯片开始了一个新项目Android 将教程代码集成到生成的NavigationView代码中,android,Android,学习安卓,现在我遇到了一个简单的问题 我用菜单幻灯片开始了一个新项目 package com.naradanews.naradanews; import android.os.Bundle; import android.support.design.widget.FloatingActionButton; import android.support.design.widget.Snackbar; import android.support.v4.app.FragmentActivity;
package com.naradanews.naradanews;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v4.app.FragmentActivity;
import android.support.v7.app.ActionBar;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar=(Toolbar) findViewById(R.id.toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
@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.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
// Handle the camera action
} else if (id == R.id.nav_gallery) {
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
现在这是教程代码
package com.learn2crack.tab;
import android.os.Bundle;
import android.app.ActionBar;
import android.app.FragmentTransaction;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
public class MainActivity extends FragmentActivity {
ViewPager Tab;
TabPagerAdapter TabAdapter;
ActionBar actionBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TabAdapter = new TabPagerAdapter(getSupportFragmentManager());
Tab = (ViewPager)findViewById(R.id.pager);
Tab.setOnPageChangeListener(
new ViewPager.SimpleOnPageChangeListener() {
@Override
public void onPageSelected(int position) {
actionBar = getActionBar();
actionBar.setSelectedNavigationItem(position); }
});
Tab.setAdapter(TabAdapter);
actionBar = getActionBar();
//Enable Tabs on Action Bar
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
ActionBar.TabListener tabListener = new ActionBar.TabListener(){
@Override
public void onTabReselected(android.app.ActionBar.Tab tab,
FragmentTransaction ft) {
// TODO Auto-generated method stub
}
@Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction ft) {
Tab.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(android.app.ActionBar.Tab tab,
FragmentTransaction ft) {
// TODO Auto-generated method stub
}};
//Add New Tab
actionBar.addTab(actionBar.newTab().setText("Android").setTabListener(tabListener));
actionBar.addTab(actionBar.newTab().setText("iOS").setTabListener(tabListener));
actionBar.addTab(actionBar.newTab().setText("Windows").setTabListener(tabListener));
}
}
请参见两个MainActivity中使用不同类扩展的内容。我在问如何将教程与我的代码集成 您可能想要的是将
TabLayout
与ViewPager
一起使用
这里有一个简单的例子供您开始学习,也许可以帮助您更好地理解它是如何工作的
在main活动中
您将在onCreate()中调用setContentView(R.layout.tabbed_活动)
该xml可以如下所示:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.design.widget.TabLayout
android:id="@+id/tab_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<android.support.v4.view.ViewPager
android:id="@+id/view_pager"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>
对于此视图寻呼机,您需要一个适配器来处理选项卡(本例中为片段):
你说你是一个初学者,但这里有一个教程,让你了解很多关于这方面的事情。我想如果你仔细阅读,你会设法解决你的问题。
但您可能还应该阅读一些关于活动和片段的内容。
问题在于每个教程MainActivity类都使用不同的类进行扩展。我在问,在创建应用程序时,如何完成所有这些事情。没有屏幕截图bcz我无法开始编码:)此问题的bcz。我尝试使用mainactivity单独扩展片段类,但它显示了重复的类:(你完成了其中一个教程了吗?你也读了吗?你可以创建扩展Fragment
的自定义类,并将其添加到你的main活动
。也许可以添加你的教程链接。没有链接和屏幕截图,无法想象你在尝试什么!在Java中,你只能从一个类扩展。如果你描述一下你想要实现的目标。哇,这里的人真是太棒了。AppCompatActivity扩展了FragmentActivity…除了你做不到之外,你不需要多个扩展
mTabLayout = (TabLayout) findViewById(R.id.tab_layout);
mViewPager = (ViewPager) findViewById(R.id.view_pager);
public class ViewPagerTabsAdapter extends FragmentPagerAdapter {
private List<String> mTabTitles;
private List<Fragment> mFragments;
public ViewPagerTabsAdapter(FragmentManager fm) {
super(fm);
mTabTitles = new ArrayList<>();
mFragments = new ArrayList<>();
}
@Override
public Fragment getItem(int position) {
return mFragments.get(position);
}
@Override
public int getCount() {
return mFragments.size();
}
@Override
public CharSequence getPageTitle(int position) {
return mTabTitles.get(position);
}
public void addTab(int pos, String title, Fragment fragment) {
mTabTitles.add(pos, title);
mFragments.add(pos, fragment);
}
}
public class MainActivity extends AppCompatActivity {
private ViewPager mViewPager;
private TabLayout mTabLayout;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.tabbed_activity);
mTabLayout = (TabLayout) findViewById(R.id.tab_layout);
mViewPager = (ViewPager) findViewById(R.id.view_pager);
ViewPagerTabsAdapter pagerAdapter = new ViewPagerTabsAdapter(getSupportFragmentManager());
pagerAdapter.addTab(0, "Tab 1", new Fragment());
pagerAdapter.addTab(1, "Tab 2", new Fragment());
mViewPager.setAdapter(pagerAdapter);
mTabLayout.setupWithViewPager(mViewPager);
}
}