在操作栏图标上单击启动片段

Question

我想在单击活动的操作栏图标时打开一个片段，并在单击后退按钮（片段的布局）时删除片段（并返回活动）。重要的是我的活动布局中没有<fragment>。

main activity layout

<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:gravity="center"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="This is main activity layout"
        android:textAppearance="?android:attr/textAppearanceLarge" />
        
</LinearLayout>

MainActivity

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		 
	}
	
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.activity_main_actions, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		super.onOptionsItemSelected(item);
		switch (item.getItemId()) {
		
		case R.id.settings:
			newintent();

		default:
			break;
		}
		
		return true;
		
	}

	private void newintent() {
		
		
		// Do something here to open FragmentOne.class
		
	}

	
}

Answer 1

创建一个片段并在您的点击事件方法中添加此代码

private Fragment newFragment=new NewFragment();//global variable

FragmentManager fragmentManager = getSupportFragmentManager();
        fragmentManager.popBackStack();
        FragmentTransaction ft =fragmentManager.beginTransaction();
ft.replace(R.id.current_layout, newFragment,"Order");
ft.commit();

您可以点击此链接.. click