Android 如何解决;布局有80多个视图,这对性能有不良影响”;?
我正在做一个有点复杂的布局,只是我无法修复LINT所指示的错误(…黑莓的视图超过80个,对性能不利) 这是布局图:Android 如何解决;布局有80多个视图,这对性能有不良影响”;?,android,performance,android-layout,tablerow,Android,Performance,Android Layout,Tablerow,我正在做一个有点复杂的布局,只是我无法修复LINT所指示的错误(…黑莓的视图超过80个,对性能不利) 这是布局图: <?xml version="1.0" encoding="utf-8"?> <ScrollView xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_wid
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".Activity_schedapunti">
<TableLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TableRow
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".7"
android:gravity="center_horizontal"
android:text="@string/esame_visivo"
android:textColor="@android:color/white"
android:textStyle="bold"
android:background="@android:color/black"/>
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".3"
android:gravity="center_horizontal"
android:text="@string/punteggio_parziale"
android:textColor="@android:color/white"
android:textStyle="bold"
android:background="@android:color/black"/>
</TableRow>
<TableRow
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".7"
android:orientation="horizontal">
<TextView
android:id="@+id/textview_aspetto"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/aspetto"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/coeff_x1"
android:textStyle="bold"
android:textColor="@color/light_yellow"/>
<EditText
android:id="@+id/edittext_aspetto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:inputType="number"
android:singleLine="true" />
</LinearLayout>
<TextView
android:id="@+id/textview_puteggio_parziale_aspetto"
android:layout_width="0dp"
android:layout_height="match_parent"
android:gravity="center"
android:layout_weight=".3"/>
</TableRow>
<TableRow
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".7"
android:orientation="horizontal">
<TextView
android:id="@+id/textview_punti_colore"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/colore"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/coeff_x2"
android:textStyle="bold"
android:textColor="@color/light_yellow"/>
<EditText
android:id="@+id/edittext_punti_colore"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:inputType="number"
android:singleLine="true" />
</LinearLayout>
<TextView
android:id="@+id/textview_puteggio_parziale_colore"
android:layout_width="0dp"
android:layout_height="match_parent"
android:gravity="center"
android:layout_weight=".3"/>
</TableRow>
<TableRow
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".7"
android:gravity="center_horizontal"
android:text="@string/esame_olfattivo"
android:textColor="@android:color/white"
android:textStyle="bold"
android:background="@android:color/black"/>
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".3"
android:gravity="center_horizontal"
android:text="@string/punteggio_parziale"
android:textColor="@android:color/white"
android:textStyle="bold"
android:background="@android:color/black"/>
</TableRow>
<TableRow
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".7"
android:orientation="horizontal">
<TextView
android:id="@+id/textview_punti_intensita"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/intensita"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/coeff_x1"
android:textStyle="bold"
android:textColor="@color/light_yellow"/>
<EditText
android:id="@+id/edittext_punti_intensita"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:inputType="number"
android:singleLine="true" />
</LinearLayout>
<TextView
android:id="@+id/textview_puteggio_parziale_intensita"
android:layout_width="0dp"
android:layout_height="match_parent"
android:gravity="center"
android:layout_weight=".3"/>
</TableRow>
<TableRow
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".7"
android:orientation="horizontal">
<TextView
android:id="@+id/textview_punti_complessita"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/complessita"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/coeff_x2"
android:textStyle="bold"
android:textColor="@color/light_yellow"/>
<EditText
android:id="@+id/edittext_punti_complessita"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:inputType="number"
android:singleLine="true" />
</LinearLayout>
<TextView
android:id="@+id/textview_puteggio_parziale_complessita"
android:layout_width="0dp"
android:layout_height="match_parent"
android:gravity="center"
android:layout_weight=".3"/>
</TableRow>
<TableRow
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".7"
android:orientation="horizontal">
<TextView
android:id="@+id/textview_punti_qualita"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/qualita"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/coeff_x3"
android:textStyle="bold"
android:textColor="@color/light_yellow"/>
<EditText
android:id="@+id/edittext_punti_qualita"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:inputType="number"
android:singleLine="true" />
</LinearLayout>
<TextView
android:id="@+id/textview_puteggio_parziale_qualita"
android:layout_width="0dp"
android:layout_height="match_parent"
android:gravity="center"
android:layout_weight=".3"/>
</TableRow>
<TableRow
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".7"
android:gravity="center_horizontal"
android:text="@string/esame_gusto_olfattivo"
android:textColor="@android:color/white"
android:textStyle="bold"
android:background="@android:color/black"/>
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".3"
android:gravity="center_horizontal"
android:text="@string/punteggio_parziale"
android:textColor="@android:color/white"
android:textStyle="bold"
android:background="@android:color/black"/>
</TableRow>
<TableRow
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".7"
android:orientation="horizontal">
<TextView
android:id="@+id/textview_punti_struttura"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/struttura"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/coeff_x1"
android:textStyle="bold"
android:textColor="@color/light_yellow"/>
<EditText
android:id="@+id/edittext_punti_struttura"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:inputType="number"
android:singleLine="true" />
</LinearLayout>
<TextView
android:id="@+id/textview_puteggio_parziale_struttura"
android:layout_width="0dp"
android:layout_height="match_parent"
android:gravity="center"
android:layout_weight=".3"/>
</TableRow>
<TableRow
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".7"
android:orientation="horizontal">
<TextView
android:id="@+id/textview_punti_equilibrio"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/equilibrio"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/coeff_x1"
android:textStyle="bold"
android:textColor="@color/light_yellow"/>
<EditText
android:id="@+id/edittext_punti_equilibrio"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:inputType="number"
android:singleLine="true" />
</LinearLayout>
<TextView
android:id="@+id/textview_puteggio_parziale_equilibrio"
android:layout_width="0dp"
android:layout_height="match_parent"
android:gravity="center"
android:layout_weight=".3"/>
</TableRow>
<TableRow
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".7"
android:orientation="horizontal">
<TextView
android:id="@+id/textview_punti_intensita_gusto_olfattivo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/intensita"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/coeff_x1"
android:textStyle="bold"
android:textColor="@color/light_yellow"/>
<EditText
android:id="@+id/edittext_punti_intensita_gusto_olfattivo"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:inputType="number"
android:singleLine="true" />
</LinearLayout>
<TextView
android:id="@+id/textview_puteggio_parziale_intensita_gusto_olfattivo"
android:layout_width="0dp"
android:layout_height="match_parent"
android:gravity="center"
android:layout_weight=".3"/>
</TableRow>
<TableRow
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".7"
android:orientation="horizontal">
<TextView
android:id="@+id/textview_punti_persistenza"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/persistenza"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/coeff_x2"
android:textStyle="bold"
android:textColor="@color/light_yellow"/>
<EditText
android:id="@+id/edittext_punti_persistenza"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:inputType="number"
android:singleLine="true" />
</LinearLayout>
<TextView
android:id="@+id/textview_puteggio_parziale_persistenza"
android:layout_width="0dp"
android:layout_height="match_parent"
android:gravity="center"
android:layout_weight=".3"/>
</TableRow>
<TableRow
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".7"
android:orientation="horizontal">
<TextView
android:id="@+id/textview_punti_qualita_gusto_olfattivo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/qualita"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/coeff_x3"
android:textStyle="bold"
android:textColor="@color/light_yellow"/>
<EditText
android:id="@+id/edittext_punti_qualita_gusto_olfattivo"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:inputType="number"
android:singleLine="true" />
</LinearLayout>
<TextView
android:id="@+id/textview_puteggio_parziale_qualita_gusto_olfattivo"
android:layout_width="0dp"
android:layout_height="match_parent"
android:gravity="center"
android:layout_weight=".3"/>
</TableRow>
<TableRow
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".7"
android:orientation="horizontal">
<TextView
android:id="@+id/textview_punti_armonia"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/armonia"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/coeff_x3"
android:textStyle="bold"
android:textColor="@color/light_yellow"/>
<EditText
android:id="@+id/edittext_punti_armonia"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:inputType="number"
android:singleLine="true" />
</LinearLayout>
<TextView
android:id="@+id/textview_puteggio_parziale_armonia"
android:layout_width="0dp"
android:layout_height="match_parent"
android:gravity="center"
android:layout_weight=".3"/>
</TableRow>
<TableRow
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".7"
android:gravity="center_horizontal"
android:text="@string/punteggio_totale"
android:textColor="@android:color/white"
android:textStyle="bold"
android:background="@android:color/black"/>
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".3"
android:gravity="center_horizontal"
android:textColor="@color/light_yellow"
android:textStyle="bold"
android:background="@android:color/black"/>
</TableRow>
</TableLayout>
</ScrollView>
我阅读是为了使用ListView,但是我应该怎么做呢?不是所有的行都是相等的,或者在任何情况下,中间有一些元素不等于所有其他行!
图像:
哇,这太糟糕了,请使用ListView而不是TableView,并根据您所在的分区动态添加行
我将扩展BaseAdapter来实现这一点,这显然是
列表视图的一个很好的候选者。正如我在评论中所说,您可以在适配器中使用自定义布局。我不知道您是如何获取数据的,因此我无法确切说明如何检查,但在每一轮getView()
中,您可以检查数据并决定显示/隐藏哪个视图
只需使用TextView
s等创建layout
。。。每一行可能需要,看起来可能在垂直LinearLayout
的内部,而水平LinearLayout
在内部,或者只是一个RelativeLayout
,然后根据需要将可见性更改为可见/消失
如果你不熟悉做这件事,那么你可以看看如何做
正如一篇评论中指出的,如果您有非常不同的布局
,则可以在适配器的getView()
方法中使用不同的布局
,这可能会使切换可见性
成为一种糟糕的方法。这取决于您的数据和布局。您必须使用MergeAdapter,您可以将不同的适配器合并到一个适配器。例如标题和值。我从StackOverflow获得了代码,但是我找不到主题,所以我将找到的代码粘贴到这里
package com.mydocum.adapters;
import java.util.ArrayList;
import android.database.DataSetObserver;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListAdapter;
import android.widget.SectionIndexer;
import android.widget.TextView;
/**
* Adapter that merges multiple child adapters and views into a single
* contiguous whole.
*
* Adapters used as pieces within MergeAdapter must have view type IDs
* monotonically increasing from 0. Ideally, adapters also have distinct ranges
* for their row ids, as returned by getItemId().
*
*/
public class MergeAdapter extends BaseAdapter implements SectionIndexer {
protected ArrayList<ListAdapter> pieces = new ArrayList<ListAdapter>();
protected String noItemsText;
/**
* Stock constructor, simply chaining to the superclass.
*/
public MergeAdapter() {
super();
}
/**
* Adds a new adapter to the roster of things to appear in the aggregate
* list.
*
* @param adapter
* Source for row views for this section
*/
public void addAdapter(ListAdapter adapter) {
pieces.add(adapter);
adapter.registerDataSetObserver(new CascadeDataSetObserver());
}
/**
* Get the data item associated with the specified position in the data set.
*
* @param position
* Position of the item whose data we want
*/
public Object getItem(int position) {
for (ListAdapter piece : pieces) {
int size = piece.getCount();
if (position < size) {
return (piece.getItem(position));
}
position -= size;
}
return (null);
}
public void setNoItemsText(String text){
noItemsText = text;
}
/**
* Get the adapter associated with the specified position in the data set.
*
* @param position
* Position of the item whose adapter we want
*/
public ListAdapter getAdapter(int position) {
for (ListAdapter piece : pieces) {
int size = piece.getCount();
if (position < size) {
return (piece);
}
position -= size;
}
return (null);
}
/**
* How many items are in the data set represented by this Adapter.
*/
public int getCount() {
int total = 0;
for (ListAdapter piece : pieces) {
total += piece.getCount();
}
if(total == 0 && noItemsText != null){
total = 1;
}
return (total);
}
/**
* Returns the number of types of Views that will be created by getView().
*/
@Override
public int getViewTypeCount() {
int total = 0;
for (ListAdapter piece : pieces) {
total += piece.getViewTypeCount();
}
return (Math.max(total, 1)); // needed for setListAdapter() before
// content add'
}
/**
* Get the type of View that will be created by getView() for the specified
* item.
*
* @param position
* Position of the item whose data we want
*/
@Override
public int getItemViewType(int position) {
int typeOffset = 0;
int result = -1;
for (ListAdapter piece : pieces) {
int size = piece.getCount();
if (position < size) {
result = typeOffset + piece.getItemViewType(position);
break;
}
position -= size;
typeOffset += piece.getViewTypeCount();
}
return (result);
}
/**
* Are all items in this ListAdapter enabled? If yes it means all items are
* selectable and clickable.
*/
@Override
public boolean areAllItemsEnabled() {
return (false);
}
/**
* Returns true if the item at the specified position is not a separator.
*
* @param position
* Position of the item whose data we want
*/
@Override
public boolean isEnabled(int position) {
for (ListAdapter piece : pieces) {
int size = piece.getCount();
if (position < size) {
return (piece.isEnabled(position));
}
position -= size;
}
return (false);
}
/**
* Get a View that displays the data at the specified position in the data
* set.
*
* @param position
* Position of the item whose data we want
* @param convertView
* View to recycle, if not null
* @param parent
* ViewGroup containing the returned View
*/
public View getView(int position, View convertView, ViewGroup parent) {
for (ListAdapter piece : pieces) {
int size = piece.getCount();
if (position < size) {
return (piece.getView(position, convertView, parent));
}
position -= size;
}
if(noItemsText != null){
TextView text = new TextView(parent.getContext());
text.setText(noItemsText);
return text;
}
return (null);
}
/**
* Get the row id associated with the specified position in the list.
*
* @param position
* Position of the item whose data we want
*/
public long getItemId(int position) {
for (ListAdapter piece : pieces) {
int size = piece.getCount();
if (position < size) {
return (piece.getItemId(position));
}
position -= size;
}
return (-1);
}
public int getPositionForSection(int section) {
int position = 0;
for (ListAdapter piece : pieces) {
if (piece instanceof SectionIndexer) {
Object[] sections = ((SectionIndexer) piece).getSections();
int numSections = 0;
if (sections != null) {
numSections = sections.length;
}
if (section < numSections) {
return (position + ((SectionIndexer) piece)
.getPositionForSection(section));
} else if (sections != null) {
section -= numSections;
}
}
position += piece.getCount();
}
return (0);
}
public int getSectionForPosition(int position) {
int section = 0;
for (ListAdapter piece : pieces) {
int size = piece.getCount();
if (position < size) {
if (piece instanceof SectionIndexer) {
return (section + ((SectionIndexer) piece)
.getSectionForPosition(position));
}
return (0);
} else {
if (piece instanceof SectionIndexer) {
Object[] sections = ((SectionIndexer) piece).getSections();
if (sections != null) {
section += sections.length;
}
}
}
position -= size;
}
return (0);
}
public Object[] getSections() {
ArrayList<Object> sections = new ArrayList<Object>();
for (ListAdapter piece : pieces) {
if (piece instanceof SectionIndexer) {
Object[] curSections = ((SectionIndexer) piece).getSections();
if (curSections != null) {
for (Object section : curSections) {
sections.add(section);
}
}
}
}
if (sections.size() == 0) {
return (null);
}
return (sections.toArray(new Object[0]));
}
private class CascadeDataSetObserver extends DataSetObserver {
@Override
public void onChanged() {
notifyDataSetChanged();
}
@Override
public void onInvalidated() {
notifyDataSetInvalidated();
}
}
}
在列表视图中,您将拥有一个接一个的adapterA和AndAperB,并正确地进行淋浴。这两个适配器可以具有不同的对象
再见。你能发布一张它应该是什么样子的图片吗?这可能会有所帮助。使用列表视图
您可以在适配器
中使用自定义布局
,并根据某个值决定显示/不显示某些视图
s,如果这对您有效。您试图实现什么布局?截图就好了。同时使用如此多的视图会减慢您的速度app@codeMagic我添加图像;)请看我的答案,您需要扩展基本适配器,并根据您所在的部分执行一些条件逻辑,以确定要添加多少行或ListView
还支持多行类型,而不是显示隐藏您可以添加对多行类型的支持,并从getView()
中膨胀相应的行。我解决了!!谢谢我不知道我是否正确解决了…但是…我通过实现ListViewHaha解决了…不客气!如果您使用ListView
解决了问题,并且它正常工作,那么您可能正确地解决了问题。这对于visbile/gone来说是一种不好的做法。我认为做@M-WaJeEh的事情更好said@MobileMon我不知道情况有多糟。这取决于它是如何实现的,以及数据是什么样的。我有一个使用它的列表视图
,因为我有一行显示特定的ImageButton
s,这取决于来自服务器的内容。但是,是的,这个建议也应该有效。关键是,无论哪种方式都需要使用自定义的视图
MergeAdapter adapter = new MergeAdapter();
AdapterA adapterA = new AdapterA(...);
AdapterB adapterB = new AdapterB(...);
adapter.addAdapter(adapterA);
adapter.addAdapter(adapterB);
listview.setAdapter(adapter);