Android Fragment 笔记之一动态添加

一，Activity 布局为

<?xml version="1.0" encoding="utf-8"?>
<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:orientation="vertical"
    tools:context="com.jiangtunjf.jgapplication.Main9Activity">

    <Button
        android:text="显示1"
        android:onClick="onTestTwo"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

    <Button
        android:text="显示2"
        android:onClick="onTestTwo2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

    <Button
        android:text="显示3"
        android:onClick="onTestTwo3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

    <Button
        android:text="隐藏1"
        android:onClick="onTestTwo4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

    <Button
        android:text="隐藏2"
        android:onClick="onTestTwo5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

    <Button
        android:text="隐藏3"
        android:onClick="onTestTwo6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

    <FrameLayout
        android:id="@+id/flly_content"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</LinearLayout>

public class Main10Activity extends AppCompatActivity {

    private FrameLayout mFrameLayoutContent;
    private TestFragment mTestFragment;
    private TestFragment2 mTestFragment2;
    private TestFragment3 mTestFragment3;
    private FragmentManager mSupportFragmentManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main10);
        mFrameLayoutContent = findViewById(R.id.flly_content);
        mSupportFragmentManager = getSupportFragmentManager();

        mTestFragment = new TestFragment();
        mTestFragment2 = new TestFragment2();
        mTestFragment3 = new TestFragment3();
        init();
    }

    /**
     * 初始化操作
     */
    private void init() {

        mSupportFragmentManager.beginTransaction()
                .add(R.id.flly_content, mTestFragment, mTestFragment.getClass().getSimpleName())
                .add(R.id.flly_content, mTestFragment2, mTestFragment2.getClass().getSimpleName())
                .add(R.id.flly_content, mTestFragment3, mTestFragment3.getClass().getSimpleName())
                .commit();
    }

    public void onTestTwo(View view) {
        LogUtils.d("onTestTwo");
        mSupportFragmentManager.beginTransaction()
                .show(mTestFragment)
                .commit();
    }

    public void onTestTwo2(View view) {
        mSupportFragmentManager.beginTransaction()
                .show(mTestFragment2)
                .commit();

    }

    public void onTestTwo3(View view) {
        mSupportFragmentManager.beginTransaction()
                .show(mTestFragment3)
                .commit();
    }


    public void onTestTwo4(View view) {
        mSupportFragmentManager.beginTransaction()
                .hide(mTestFragment)
                .commit();
    }

    public void onTestTwo5(View view) {
        mSupportFragmentManager.beginTransaction()
                .remove(mTestFragment2)
                .commit();
    }

    public void onTestTwo6(View view) {
        mSupportFragmentManager.beginTransaction()
                .remove(mTestFragment3)
                .commit();
    }

}