[英]open fragment under parent activity
我想在活动中但在活动对象下打开一个片段。 在我的代码中RelativeLayout是父级,而LinearLayout是子级,但是当在relativelayout上打开片段时,我会失去linearlayout :(这是我的代码:
主要活动Java:
public class MainActivity extends AppCompatActivity implements View.OnClickListener{
private Context context;
private Button fragment1 , fragment2;
private RelativeLayout relativeLayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context = getApplicationContext();
fragment1 = this.findViewById(R.id.fragment1);
fragment2 = this.findViewById(R.id.fragment2);
relativeLayout = this.findViewById(R.id.relativeLayout);
fragment1.setOnClickListener(this);
fragment2.setOnClickListener(this);
}
@Override
public void onClick(View view) {
switch (view.getId()){
case R.id.fragment1:
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.relativeLayout , new fragment1());
ft.commit();
break;
case R.id.fragment2:
FragmentManager fm2 = getSupportFragmentManager();
FragmentTransaction ft2 = fm2.beginTransaction();
ft2.replace(R.id.relativeLayout , new fragment2());
ft2.commit();
break;
}
}
}
主要活动XML:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:id="@+id/relativeLayout">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="60dp"
android:id="@+id/layout"
android:background="#F00"
android:orientation="horizontal">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="fragment 1"
android:id="@+id/fragment1"
android:gravity="center"
android:layout_gravity="center"/>
<Button
android:id="@+id/fragment2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:text="fragment 2" />
</LinearLayout>
</RelativeLayout>
fragment1 XML:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#0F0">
</android.support.constraint.ConstraintLayout>
fragment2 XML:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#00F">
</android.support.constraint.ConstraintLayout>
这是主要活动: 在此处输入图片描述
当单击fragment1时: 在此处输入图像描述
请帮我:)
TNX
在linearlayout之前的relativelayout中添加framelayout,然后在framelayout中为片段充气。
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:id="@+id/relativeLayout">
<FrameLayout
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="60dp"
android:id="@+id/linearLayout"
android:background="#F00"
android:orientation="horizontal">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="fragment 1"
android:id="@+id/fragment1"
android:gravity="center"
android:layout_gravity="center"/>
<Button
android:id="@+id/fragment2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:text="fragment 2" />
</LinearLayout>
</RelativeLayout>
我认为您应该将Fragment1 XML和Fragment2 XML从Constraint Layout更改为LinearLayout。 它应该可以工作,否则在MainActivity中启动LineaLayout。
您正在放大“父版式”上的片段。 使Relativelayout的两个子节点像这样膨胀一个片段:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:id="@+id/relativeLayout">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="60dp"
android:id="@+id/linearLayout"
android:background="#F00"
android:orientation="horizontal">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="fragment 1"
android:id="@+id/fragment1"
android:gravity="center"
android:layout_gravity="center"/>
<Button
android:id="@+id/fragment2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:text="fragment 2" />
</LinearLayout>
<!-- inflate fragments on FrameLayout -->
<FrameLayout
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@+id/linearLayout">
</FrameLayout>
</RelativeLayout>
在此FrameLayout上填充片段...希望有帮助:)
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