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!