我正在尝试创建linearLayout的多个实例。我创建了我的布局文件(下面)。我把它放在自己的布局文件中,从另一个文件(main_activity.xml)中我想在滚动视图中添加动态数量的线性布局实例。我知道我可以在我的java代码中以编程方式创建相同的linearlayout并循环遍历它,但我不愿意(主要有两个原因)
我是否可以将我的逻辑保留在java中,然后只是动态创建/实例化我的线性布局的多个“实例”。我的猜测是有一个简单的解决方案,但我的新手状态使我解决它的能力蒙上阴影。出于某种原因,我的java代码可以找到LinearLayout但无法找到第一个TextView(@ + id / submittedBy)。
非常感谢, 克雷格
Java Logic
ScrollView sv = (ScrollView) findViewById(R.id.existingCommentsScrollView);
//DEBUGGING LOOP- REMOVE ME
for(int i=0;i<30;i++){
LinearLayout ll = (LinearLayout)findViewById(R.id.existingCommentLinearLayout);
TextView submittedByTextView = (TextView) findViewById(R.id.submittedBy);
submittedByTextView.setText("Craig " +i);
TextView submittedDate = (TextView) findViewById(R.id.dateField);
submittedDate.setText("SubmittedDate " +i);
RatingBar showRating = (RatingBar) findViewById(R.id.userShowRating);
showRating.setRating(3);
RatingBar soundRating = (RatingBar) findViewById(R.id.userSoundRating);
soundRating.setRating(1);
EditText commentText = (EditText) findViewById(R.id.userCommentEditText);
commentText.setText("THIS IS WHERE MY TEXT GOES FOR "+i+" I could add more too");
sv.addView(ll);
}
sv.refreshDrawableState();
布局:
<?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:background="@drawable/linear_layout_border"
android:orientation="vertical"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen" >
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#000000"
android:paddingBottom="4dp"
android:paddingLeft="4dp"
android:paddingRight="4dp"
android:paddingTop="4dp"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen" >
<TextView
android:id="@+id/submittedBy"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:gravity="center_horizontal"
android:inputType="none"
android:paddingBottom="1dp"
android:paddingLeft="4dp"
android:paddingRight="10dp"
android:paddingTop="1dp"
android:text="NameGoesHere"
android:textColor="#E6E6E6"
android:textSize="8sp" />
<TextView
android:id="@+id/dateField"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@id/submittedBy"
android:ems="10"
android:paddingBottom="1dp"
android:paddingLeft="4dp"
android:paddingRight="10dp"
android:paddingTop="1dp"
android:text="DateGoesHere"
android:textColor="#E6E6E6"
android:textSize="8sp" />
</RelativeLayout>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#000000"
android:paddingBottom="4dp"
android:paddingLeft="4dp"
android:paddingRight="4dp"
android:paddingTop="4dp"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen" >
<TextView
android:id="@+id/userShowRatingTextView"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:gravity="center_horizontal"
android:inputType="none"
android:paddingBottom="1dp"
android:paddingLeft="4dp"
android:paddingRight="10dp"
android:paddingTop="1dp"
android:text="Show Rating"
android:textColor="#E6E6E6"
android:textSize="8sp" />
<RatingBar
android:id="@+id/userShowRating"
style="?android:attr/ratingBarStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@id/userShowRatingTextView" />
</RelativeLayout>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#000000"
android:paddingBottom="4dp"
android:paddingLeft="4dp"
android:paddingRight="4dp"
android:paddingTop="4dp"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen" >
<TextView
android:id="@+id/userSoundRatingTextView"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_toRightOf="@id/userShowRating"
android:gravity="center_horizontal"
android:inputType="none"
android:paddingBottom="1dp"
android:paddingLeft="4dp"
android:paddingRight="10dp"
android:paddingTop="1dp"
android:text="Sound Rating"
android:textColor="#E6E6E6"
android:textSize="8sp" />
<RatingBar
android:id="@+id/userSoundRating"
style="?android:attr/ratingBarStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@id/userSoundRatingTextView" />
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<EditText
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/editText2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#000000"
android:inputType="none"
android:paddingBottom="4dp"
android:paddingLeft="4dp"
android:paddingRight="4dp"
android:paddingTop="4dp"
android:text="Comment Goes Here"
android:textColor="#E6E6E6"
android:textSize="12sp"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen" >
<requestFocus />
</EditText>
</RelativeLayout>
答案 0 :(得分:0)
你没有遇到任何异常?我指的是循环中的最后一行,在每次迭代中将LinearLayout
添加到ScrollView
。您可能正在尝试对您的布局文件进行充气,然后将其添加到ScrollView
,如下所示:
ScrollView sv = (ScrollView) findViewById(R.id.existingCommentsScrollView);
// I assume this LinearLayout is the only child of the ScrollView above
LinearLayout ll = (LinearLayout)findViewById(R.id.existingCommentLinearLayout);
for(int i=0;i<30;i++){
// R.layout.the_layout_file is your layout from the question
View inflatedView = getLayoutInflater().inflate(R.layout.the_layout_file, ll, false);
TextView submittedByTextView = (TextView) inflatedView.findViewById(R.id.submittedBy);
submittedByTextView.setText("Craig " +i);
TextView submittedDate = (TextView) inflatedView.findViewById(R.id.dateField);
submittedDate.setText("SubmittedDate " +i);
RatingBar showRating = (RatingBar) inflatedView.findViewById(R.id.userShowRating);
showRating.setRating(3);
RatingBar soundRating = (RatingBar) inflatedView.findViewById(R.id.userSoundRating);
soundRating.setRating(1);
EditText commentText = (EditText) inflatedView.findViewById(R.id.userCommentEditText);
commentText.setText("THIS IS WHERE MY TEXT GOES FOR "+i+" I could add more too");
ll.addView(inflatedView);
}
另外,请记住,您要添加大量视图,以避免流畅的界面。