布局 - 帧布局

FrameLayout 帧布局

帧布局不常用，所有控件都会摆在左上角。

示例代码

activity_frame_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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=".chapter03.FrameLayoutActivity"
    android:orientation="vertical">

    <ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scrollbars="vertical">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <FrameLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent">

                <Button
                    android:id="@+id/btn_rela_1"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Button 1"
                    android:textAllCaps="false"
                    android:layout_gravity="left"/>

                <Button
                    android:id="@+id/btn_rela_2"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Button 2"
                    android:textAllCaps="false"
                    android:layout_gravity="right"/>

            </FrameLayout>

        </LinearLayout>
    </ScrollView>

</LinearLayout>

FrameLayoutActivity.java

public class FrameLayoutActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_frame_layout);
    }
}