Android从Fragment跳转到其他Activity的简单实例

为了更好的理解以下内容,我们需要简单了解一下Fragment的动态注册方法

Android——Fragment的静态注册和动态注册

为了实现从Fragment跳转到其他Activity,下面需要创建以下文件:

第一步:简单编写布局文件fragment_activity.xml和抽象类TemplateFragmentActivity.java代码如下:

fragment_activity.xml

<?xml version="1.0" encoding="utf-8"?>

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:id="@+id/temp_fragment_activity"

android:layout_width="match_parent"

android:layout_height="match_parent">

</FrameLayout>

fragment_activity.xml布局主要用于承载各fragment布局,例如fragment_one.xml和fragment_two.xml。

TemplateFragmentActivity.java

package com.example.myapplication;

import android.os.Bundle;

import androidx.annotation.Nullable;

import androidx.appcompat.app.AppCompatActivity;

import androidx.fragment.app.Fragment;

import androidx.fragment.app.FragmentManager;

import androidx.fragment.app.FragmentTransaction;

public abstract class TemplateFragmentActivity extends AppCompatActivity

{

private FragmentManager fm;

private FragmentTransaction ts;

private Fragment fragment;

//抽象方法,用于创建Fragment实例

protected abstract Fragment createFragment();

@Override

protected void onCreate(@Nullable Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.fragment_activity);

fm = getSupportFragmentManager();

ts = fm.beginTransaction();

if (fragment == null){

fragment = createFragment();

ts.add(R.id.temp_fragment_activity,fragment);

ts.commit();

}

}

}

第二步:分别使类FragmentOneActivity和FragmentTwoActivity继承类TemplateFragmentActivity并实现抽象方法createFragment()

FragmentOneActivity.java

package com.example.myapplication;

import androidx.fragment.app.Fragment;

public class FragmentOneActivity extends TemplateFragmentActivity {

@Override

protected Fragment createFragment() {

return new FragmentOne();

}

}

FragmentTwoActivity.java与FragmentOneActivity.java类似,不在重复。

第三步:分别编写fragment_one.xml和fragment_two.xml布局文件并通过编写FragmentOne.java和FragmentTwo.java绑定对应的布局文件,并实现其具体功能。

fragment_one.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:gravity="center"

android:background="@color/colorPrimaryDark"

android:orientation="vertical">

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:gravity="center"

android:text="点击下面的按钮跳转到FragmentTwoActivity"

android:textSize="20sp"

android:textAllCaps="false"

android:textColor="#F70505">

</TextView>

<Button

android:id="@+id/btn_fm_one"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="跳转"

android:textSize="30dp"

android:layout_marginTop="20dp">

</Button>

</LinearLayout>

fragment_two.xml与fragment_one.xml类似,不在重复。

FragmentOne.java

package com.example.myapplication;

import android.content.Intent;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.Button;

import androidx.annotation.NonNull;

import androidx.annotation.Nullable;

import androidx.fragment.app.Fragment;

public class FragmentOne extends Fragment {

private Button mBtnFragmentOne;

@Nullable

@Override

public View onCreateView(@NonNull LayoutInflater inflater,

@Nullable ViewGroup container,

@Nullable Bundle savedInstanceState) {

View view = inflater.inflate(R.layout.fragment_one,container,false);

mBtnFragmentOne = view.findViewById(R.id.btn_fm_one);

mBtnFragmentOne.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

Intent intent = new Intent(getActivity(),FragmentTwoActivity.class);

startActivity(intent);

}

});

return view;

}

}

Fragment跳转到Activity与Activity跳转到Activity方法类似,如下:

Intent intent = new Intent(getActivity(),FragmentTwoActivity.class);

startActivity(intent);

FragmentTwo.java与FragmentOne .java类似,不在重复。

演示·:

总结

以上所述是小编给大家介绍的Android从Fragment跳转到其他Activity的简单实例,希望对大家有所帮助!

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