[英]Custom view messing up layout
我编写的自定义视图一直存在问题。 基本上,我有一个自定义视图,可以处理座椅的不同部分,并具有不同的状态。 我设法编写了代码,并且运行良好。
由于该应用程序的运行速度有点慢,因此我决定裁剪图像:与其以透明的方式显示整个屏幕,不如以整个屏幕的一部分显示(我没有绘制图形)。
但是由于我已经裁剪了图像,所以它们弄乱了我的布局 。 而且我不知道为什么,因为当我用ImageView替换自定义视图时,它非常合适!
看来我的观点忽略了“ wrap_content”,并且花费了超出其所需的一切。 将值设置为“ match_parent”也不起作用。
我尝试再次裁剪图像,我以为是因为尺寸,但不是。 我尝试覆盖onMeasure方法,没有任何变化。 而且我不想对大小进行硬编码,因为我觉得这是一件坏事。
为什么会发生这种情况,我该如何解决?
这是我的一些代码片段。
fragment_lumbar.xml:
<?xml version="1.0" encoding="utf-8"?>
<!-- Main screen -->
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/background_logo">
<!-- Left menu with control buttons -->
<RelativeLayout
android:id="@+id/lumbar_control"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="61dp">
<ImageButton
android:id="@+id/button_arrowup"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="40dp"
android:background="@drawable/arrowup_button"
android:contentDescription="@string/moveup_lumbar" />
<!-- Plus/minus buttons -->
<ImageButton
android:id="@+id/button_plus"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/button_arrowup"
android:layout_centerVertical="true"
android:background="@drawable/plus_button"
android:contentDescription="@string/inflate_lumbar" />
<ImageButton
android:id="@+id/button_minus"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/button_arrowup"
android:layout_toRightOf="@id/button_plus"
android:layout_marginLeft="90dp"
android:background="@drawable/minus_button"
android:contentDescription="@string/deflate_back" />
<!-- Arrown down button -->
<ImageButton
android:id="@+id/button_arrowdown"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/button_plus"
android:layout_centerHorizontal="true"
android:background="@drawable/arrowdown_button"
android:contentDescription="@string/movedown_lumbar" />
<!-- Home button -->
</RelativeLayout>
<!-- Right panel -->
<!-- Screen -->
<FrameLayout
android:id="@+id/center_frame"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginTop="7dp"
android:layout_toRightOf="@id/lumbar_control"
android:background="@drawable/screen" >
<TextView
android:id="@+id/text_state"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_margin="10dp"
android:textSize="32sp"
android:gravity="center"
android:textColor="@color/white"
android:text="hello"/>
<!-- Seat screen -->
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/seat"
android:src="@drawable/lumbar_control_seat"/>
<com.SeatStateView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/lumbar_seat_state"
android:id="@+id/lumbar_seat_state" />
</FrameLayout>
<!-- Home button -->
<Button
android:id="@+id/button_home"
android:layout_width="332dp"
android:layout_height="44dp"
android:layout_centerHorizontal="true"
android:background="@android:color/transparent"
android:layout_alignParentBottom="true"
android:contentDescription="@string/home_button"/>
</RelativeLayout>
lumbar_seat_state:
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:drawable="@drawable/lumbar_seat_state_1" />
<item android:drawable="@drawable/lumbar_seat_state_2" />
<item android:drawable="@drawable/lumbar_seat_state_3" />
</layer-list>
lumbar_seat_state_1:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res/com">
<item android:drawable="@drawable/lumbar_inflate_1"
app:state_inflating="true" />
<item android:drawable="@drawable/lumbar_deflate_1"
app:state_deflating="true" />
<item android:drawable="@drawable/lumbar_idle_1" />
</selector>
SeatStateView.java:
public class SeatStateView extends View {
/* Custom states */
private static final int[] INFLATING_STATE_SET = {
R.attr.state_inflating
};
private static final int[] DEFLATING_STATE_SET = {
R.attr.state_deflating
};
private static final int[] HEATING_STATE_SET = {
R.attr.state_heating
};
private static final int[] COOLING_STATE_SET = {
R.attr.state_cooling
};
/* Inflate/Deflate state */
private boolean isInflating = false;
private boolean isDeflating = false;
/* Heating state */
private boolean isHeating = false;
private boolean isCooling = false;
public SeatStateView(Context context, AttributeSet attrs) {
super(context, attrs);
}
// Overrides the onCreateDrawable to add our custom states
@Override
protected int[] onCreateDrawableState(int extraSpace) {
final int[] drawableState = super.onCreateDrawableState(extraSpace + 2);
// Checking the states
if(isInflating) {
mergeDrawableStates(drawableState, INFLATING_STATE_SET);
}
if(isDeflating) {
mergeDrawableStates(drawableState, DEFLATING_STATE_SET);
}
if(isHeating) {
mergeDrawableStates(drawableState, HEATING_STATE_SET);
}
if(isCooling) {
mergeDrawableStates(drawableState, COOLING_STATE_SET);
}
return drawableState;
}
@Override
protected void onMeasure (int widthMeasureSpec, int heightMeasureSpec){
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int parentWidth = MeasureSpec.getSize(widthMeasureSpec);
int parentHeight = MeasureSpec.getSize(heightMeasureSpec);
this.setMeasuredDimension(parentWidth, parentHeight);
}
/**
* Clears all the states and set to idle.
*/
public void setIdle() {
isInflating = isDeflating = false;
// Refresh view
refreshDrawableState();
}
public void setInflating(boolean state) {
if(isInflating != state) {
// Update all the states
isInflating = state;
if(isInflating) {
isDeflating = false;
}
// Refresh view
refreshDrawableState();
}
}
public void setDeflating(boolean state) {
if(isDeflating != state) {
// Update all the states
isDeflating = state;
if(isDeflating) {
isInflating = false;
}
// Refresh view
refreshDrawableState();
}
}
public void setHeating(boolean state) {
if(isHeating != state) {
isHeating = state;
if(state) {
isCooling = false;
}
// Refresh view
refreshDrawableState();
}
}
public void setCooling(boolean state) {
if(isCooling != state) {
isCooling = state;
if(state) {
isHeating = false;
}
// Refresh view
refreshDrawableState();
}
}
}
好吧,只是搜索更多。 发现我没有正确覆盖我的onMeasure方法。 如果有人偶然发现了这个问题,这是我的新实现:
SeatStateView.java:
@Override
protected void onMeasure (int widthMeasureSpec, int heightMeasureSpec){
// Background image’s size
int desiredWidth = getBackground().getIntrinsicWidth();
int desiredHeight = getBackground().getIntrinsicHeight();
int widthMode = MeasureSpec.getMode(widthMeasureSpec);
int widthSize = MeasureSpec.getSize(widthMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
int heightSize = MeasureSpec.getSize(heightMeasureSpec);
// Final size
int width, height;
// Set width depending on mode
if(widthMode == MeasureSpec.EXACTLY) {
width = widthSize;
}
else if(widthMode == MeasureSpec.AT_MOST) {
width = Math.min(desiredWidth, widthSize);
}
else {
width = desiredWidth;
}
// Set height depending on mode
if(heightMode == MeasureSpec.EXACTLY) {
height = heightSize;
}
else if(widthMode == MeasureSpec.AT_MOST) {
height = Math.min(desiredHeight, heightSize);
}
else {
height = desiredHeight;
}
// Finally, set dimension
setMeasuredDimension(width, height);
}
有关详细信息,请检查以下页面: onMeasure自定义视图说明 。
对不起,打扰你。
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