Android ApiDemos示例解析(154):Views->Layouts->ScrollView->2. Long
本例使用ScrollView显示一个长列表，其定义的scroll_view_2.xml
[html]
<ScrollView xmlns:android=”http://schemas.android.com/apk/res/android”
android:layout_width=”match_parent”
android:layout_height=”wrap_content”
android:scrollbars=”none”>
<LinearLayout
android:id=”@+id/layout”
android:orientation=”vertical”
android:layout_width=”match_parent”
android:layout_height=”wrap_content”>
<TextView
android:layout_width=”match_parent”
android:layout_height=”wrap_content”
android:text=”@string/scroll_view_2_text_1″/>
<Button
android:layout_width=”match_parent”
android:layout_height=”wrap_content”
android:text=”@string/scroll_view_2_button_1″/>
</LinearLayout>
</ScrollView>
<ScrollView xmlns:android=”http://schemas.android.com/apk/res/android”
android:layout_width=”match_parent”
android:layout_height=”wrap_content”
android:scrollbars=”none”>
<LinearLayout
android:id=”@+id/layout”
android:orientation=”vertical”
android:layout_width=”match_parent”
android:layout_height=”wrap_content”>
<TextView
android:layout_width=”match_parent”
android:layout_height=”wrap_content”
android:text=”@string/scroll_view_2_text_1″/>
<Button
android:layout_width=”match_parent”
android:layout_height=”wrap_content”
android:text=”@string/scroll_view_2_button_1″/>
</LinearLayout>
</ScrollView>
ScrollView 只定义了一个TextView 和 Button在LinearLayout中，而在ScrollView2.java 使用代码为LinearLayout 动态添加了63个TextView 和Button：
[java]
LinearLayout layout
= (LinearLayout) findViewById(R.id.layout);
for (int i = 2; i < 64; i++) {
TextView textView = new TextView(this);
textView.setText("Text View " + i);
LinearLayout.LayoutParams p
= new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT
);
layout.addView(textView, p);
Button buttonView = new Button(this);
buttonView.setText("Button " + i);
layout.addView(buttonView, p);
}
LinearLayout layout
= (LinearLayout) findViewById(R.id.layout);
for (int i = 2; i < 64; i++) {
TextView textView = new TextView(this);
textView.setText("Text View " + i);
LinearLayout.LayoutParams p
= new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT
);
layout.addView(textView, p);
Button buttonView = new Button(this);
buttonView.setText("Button " + i);
layout.addView(buttonView, p);
}
从而构成一个长列表，一屏肯定显示不下，此时就可以滚动屏幕来显示：
补充：移动开发 , Android ,
