使用按钮从单个片段调用不同的片段

时间:2016-07-12 08:21:43

标签: android

我有一个带有三个按钮的片段。根据按下的按钮,我想调用另外三个片段。我的顶部片段如下所示。

<FrameLayout 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"
tools:context="com.example.ramakanta_chandra.chechiacc.BlankFragment">

<!-- TODO: Update blank fragment layout -->
<TextView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/fragment1"
    android:background="#e0e0e0"
    android:autoText="true" />

<TextView
    android:layout_width="100dp"
    android:layout_height="50dp"
    android:text="This is Video Segment"
    android:id="@+id/textView"
    android:layout_gravity="left|top"
    android:textAlignment="center"
    android:textColor="#000000"
    android:textStyle="normal" />

<TextView
    android:layout_width="100dp"
    android:layout_height="50dp"
    android:text="This is Audio Segment"
    android:id="@+id/textView5"
    android:layout_gravity="center_horizontal|top"
    android:textColor="#000000"
    android:textAlignment="center" />

<TextView
    android:layout_width="100dp"
    android:layout_height="50dp"
    android:text="This is Ebook Segment"
    android:id="@+id/textView6"
    android:layout_gravity="right|top"
    android:textAlignment="center"
    android:textColor="#000000" />

<ImageButton
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:id="@+id/videoimageButton"
    android:layout_below="@+id/textView"
    android:layout_gravity="top|left"
    android:src="@mipmap/video"
    android:layout_marginTop="30dp"
    android:clickable="false"
    android:nestedScrollingEnabled="false" />

<ImageButton
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/audioimageButton"
    android:layout_gravity="center_horizontal|top"
    android:src="@mipmap/audio"
    android:layout_marginTop="30dp"/>

<ImageButton
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/imageButton3"
    android:layout_gravity="right|top"
    android:src="@mipmap/book"
    android:layout_marginTop="30dp"/>
<LinearLayout
    android:id="@+id/fragment2"
    android:layout_height="wrap_content"
    android:layout_width="fill_parent"
    android:orientation="horizontal" />

现在我想调用名为BlankFragment4(),BlankFragment5(),BlankFragment6()的三个不同片段。为此,我的代码是

import android.app.FragmentManager;
import android.content.Context;
import android.net.Uri;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.support.annotation.Nullable;
import android.app.Fragment;
import android.widget.ImageButton;

public class BlankFragment extends Fragment {
  View myview;
   @Override
   public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    myview = inflater.inflate(R.layout.fragment_blank, container, false);
    final FragmentManager fm3 = getFragmentManager();
    ImageButton bt1 = (ImageButton)getView().findViewById(R.id.videoimageButton);
    bt1.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            fm3.beginTransaction()
                    .replace(R.id.fragment2, new BlankFragment4() )
                    .addToBackStack(null)
                    .commit();
        }
    });
    ImageButton bt2 = (ImageButton)getView().findViewById(R.id.audioimageButton);
    bt2.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {

            fm3.beginTransaction()
                    .replace(R.id.fragment2, new BlankFragment5() )
                    .addToBackStack(null)
                    .commit();
            // Do something in response to button click
        }
    });
    ImageButton bt3 = (ImageButton)getView().findViewById(R.id.audioimageButton);
    bt3.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {

            fm3.beginTransaction()
                    .replace(R.id.fragment2, new BlankFragment6() )
                    .addToBackStack(null)
                    .commit();
            // Do something in response to button click
        }
    });
    // Inflate the layout for this fragment
    return myview;
}

}

它不起作用。对于这个操作,我没有在主要活动中写任何东西。

1 个答案:

答案 0 :(得分:2)

如下所示:

Fragment.getView():

  

获取片段布局的根视图(返回的布局)   onCreateView(LayoutInflater,ViewGroup,Bundle)),如果提供的话。

并且您在getView 中调用onCreateView方法之前从返回片段布局视图。

所以使用myview View对象从Fragment layout.like中访问View:

ImageButton bt1 = (ImageButton)myview.findViewById(R.id.videoimageButton);