xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/background_login" > <FrameLayout android:id="@+id/fragment_login_replace" android:layout_width="match_parent" android:layout_height="match_parent"/> </LinearLayout> xml=====>fragment_login_replace <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:background="@drawable/background_login" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent" android:weightSum="1"> <RelativeLayout android:layout_width="match_parent" android:layout_height="100dp" android:orientation="vertical" android:layout_weight="0.29"> <ImageView android:id="@+id/imageView" android:layout_width="50dp" android:layout_height="50dp" android:src="@drawable/logo_red" android:layout_centerVertical="true" android:layout_alignLeft="@+id/textView" android:layout_alignStart="@+id/textView" /> <TextView android:id="@+id/textView" android:layout_width="219dp" android:layout_height="wrap_content" android:textSize="30dp" android:text="Home Work" android:textAllCaps="false" android:textColor="#ffff" android:textStyle="bold" android:layout_marginLeft="31dp" android:layout_marginStart="31dp" android:layout_below="@+id/imageView" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" /> </RelativeLayout> <android.support.design.widget.TextInputLayout android:layout_marginLeft="25dp" android:layout_marginRight="20dp" android:layout_marginTop="35dp" android:id="@+id/textinput_login_username" android:layout_width="match_parent" android:layout_height="wrap_content"> <EditText android:id="@+id/edit_login_username" android:layout_width="match_parent" android:layout_height="match_parent" android:hint="用戶名" /> </android.support.design.widget.TextInputLayout> <android.support.design.widget.TextInputLayout android:layout_marginLeft="25dp" android:layout_marginRight="20dp" android:id="@+id/textinput_login_password" android:layout_width="match_parent" android:layout_height="wrap_content"> <EditText android:id="@+id/edit_login_password" android:layout_width="match_parent" android:layout_height="match_parent" android:hint="密碼" /> </android.support.design.widget.TextInputLayout> <Button android:id="@+id/button_login" android:layout_width="287dp" android:layout_height="wrap_content" android:layout_marginLeft="43dp" android:layout_marginRight="20dp" android:layout_marginTop="40dp" android:background="@color/colorPrimary" android:text="登錄" android:textColor="@color/white" /> <TextView android:id="@+id/text_register" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_below="@id/button_login" android:layout_marginTop="10dp" android:layout_weight="0.03" android:gravity="center_horizontal" android:text="沒(méi)有賬號(hào)？注冊(cè)一個(gè)" android:textColor="@color/colorPrimary" android:textSize="15sp" /> </LinearLayout> Activity public void init(LoginFragment fragment){ FragmentTransaction transaction = activity.getSupportFragmentManager().beginTransaction(); transaction.replace(R.id.fragment_login_replace, fragment, "login"); transaction.commit(); } 背景顯示為白色 很是糾結(jié)