Android UI開發第三十篇——使用Fragment構建靈活的案頭

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的文章,裡面的例子能詳細的看出。


 

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/fragment_container"    android:layout_width="match_parent"    android:layout_height="match_parent" />


    Activity中使用的layout:

 

import android.os.Bundle;import android.support.v4.app.FragmentActivity;public class MainActivity extends FragmentActivity {    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.news_articles);        // Check that the activity is using the layout version with        // the fragment_container FrameLayout        if (findViewById(R.id.fragment_container) != null) {            // However, if we're being restored from a previous state,            // then we don't need to do anything and should return or else            // we could end up with overlapping fragments.            if (savedInstanceState != null) {                return;            }            // Create an instance of ExampleFragment            HeadlinesFragment firstFragment = new HeadlinesFragment();                        // In case this activity was started with special instructions from an Intent,            // pass the Intent's extras to the fragment as arguments            firstFragment.setArguments(getIntent().getExtras());                        // Add the fragment to the 'fragment_container' FrameLayout            getSupportFragmentManager().beginTransaction()                    .add(R.id.fragment_container, firstFragment).commit();        }    }}


 

// Create fragment and give it an argument specifying the article it should showArticleFragment newFragment = new ArticleFragment();Bundle args = new Bundle();args.putInt(ArticleFragment.ARG_POSITION, position);newFragment.setArguments(args);FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();// Replace whatever is in the fragment_container view with this fragment,// and add the transaction to the back stack so the user can navigate backtransaction.replace(R.id.fragment_container, newFragment);transaction.addToBackStack(null);// Commit the transactiontransaction.commit();


 

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