ActionBar实现下拉式导航
时间：2014-03-25 22:19:28
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[导读] 利用Actionbar同样可以很轻松的实现下拉式的导航方式，相比与tab的方式下拉式的导航方式更类型于html中的标签。若想实现这种效果：1)actionBar.setNavigationMode(ActionB
利用Actionbar同样可以很轻松的实现下拉式的导航方式，相比与tab的方式下拉式的导航方式更类型于html中的
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package ccom.app.main; |
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import android.annotation.SuppressLint; |
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import android.app.Fragment; |
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import android.content.Context; |
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import android.os.Bundle; |
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import android.view.LayoutInflater; |
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import android.view.View; |
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import android.view.ViewGroup; |
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import android.view.ViewGroup.LayoutParams; |
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import android.widget.TextView; |
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@SuppressLint("NewApi") |
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public class MyFragment extends Fragment { |
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@Override |
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public View onCreateView(LayoutInflater inflater, ViewGroup container, |
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Bundle savedInstanceState) { |
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Context context = this.getActivity(); |
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TextView tv = new TextView(context); |
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Bundle arc = this.getArguments(); |
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int tabs=arc.getInt("key"); |
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|
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tv.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, |
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LayoutParams.WRAP_CONTENT)); |
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tv.setText("hello actionbar "+tabs); |
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return tv; |
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} |
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} |
main.xml:
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<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" |
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xmlns:tools="http://schemas.android.com/tools" |
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android:layout_width="match_parent" |
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android:layout_height="match_parent" |
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tools:context=".Main" > |
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<LinearLayout |
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android:id="@+id/content" |
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android:layout_width="match_parent" |
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android:layout_height="match_parent" |
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android:orientation="vertical" /> |
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</RelativeLayout> |
自定义的用于显示textview的mytextview.xml:
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<?xml version="1.0" encoding="utf-8"?> |
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<TextView xmlns:android="http://schemas.android.com/apk/res/android" |
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android:id="@+id/text1" |
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android:textColor="#fff" |
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android:background="#696969" |
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android:layout_width="60sp" |
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android:layout_height="match_parent" |
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android:textAppearance="?android:attr/textAppearanceListItemSmall" |
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android:gravity="center_vertical" |
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android:paddingStart="?android:attr/listPreferredItemPaddingStart" |
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android:minHeight="?android:attr/listPreferredItemHeightSmall" |
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/> |
Main.java
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package ccom.app.main; |
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import android.annotation.SuppressLint; |
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import android.app.ActionBar; |
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import android.app.Activity; |
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import android.app.FragmentTransaction; |
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import android.os.Bundle; |
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import android.widget.ArrayAdapter; |
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@SuppressLint("NewApi") |
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public class Main extends Activity implements ActionBar.OnNavigationListener { |
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ActionBar actionBar = null; |
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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.main); |
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actionBar = this.getActionBar(); |
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actionBar.setDisplayShowTitleEnabled(true); |
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actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_LIST); |
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actionBar.setListNavigationCallbacks(new ArrayAdapter(Main.this, |
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R.layout.mytextview, R.id.text1, new String[] { "tab1", "tab2", |
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"tab3" }), this); |
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} |
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@Override |
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public boolean onNavigationItemSelected(int itemPosition, long itemId) { |
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MyFragment mf = new MyFragment(); |
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Bundle bundle = new Bundle(); |
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bundle.putInt("key", itemPosition + 1); |
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mf.setArguments(bundle); |
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FragmentTransaction action = this.getFragmentManager() |
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.beginTransaction(); |
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action.replace(R.id.content, mf); |
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action.commit(); |
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return true; |
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} |
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} |
实现的效果如图：
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