Android从Fragment跳转到其他Activity的简单实例

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<?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>

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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();
  }
 }
}

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package com.example.myapplication;
import androidx.fragment.app.Fragment;
public class FragmentOneActivity extends TemplateFragmentActivity {
 @Override
 protected Fragment createFragment() {
  return new FragmentOne();
 }
}

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<?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>

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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;
 }
}

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