[英]Custom view messing up layout
我編寫的自定義視圖一直存在問題。 基本上,我有一個自定義視圖,可以處理座椅的不同部分,並具有不同的狀態。 我設法編寫了代碼,並且運行良好。
由於該應用程序的運行速度有點慢,因此我決定裁剪圖像:與其以透明的方式顯示整個屏幕,不如以整個屏幕的一部分顯示(我沒有繪制圖形)。
但是由於我已經裁剪了圖像,所以它們弄亂了我的布局 。 而且我不知道為什么,因為當我用ImageView替換自定義視圖時,它非常合適!
看來我的觀點忽略了“ wrap_content”,並且花費了超出其所需的一切。 將值設置為“ match_parent”也不起作用。
我嘗試再次裁剪圖像,我以為是因為尺寸,但不是。 我嘗試覆蓋onMeasure方法,沒有任何變化。 而且我不想對大小進行硬編碼,因為我覺得這是一件壞事。
為什么會發生這種情況,我該如何解決?
這是我的一些代碼片段。
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。 發現我沒有正確覆蓋我的onMeasure方法。 如果有人偶然發現了這個問題,這是我的新實現:
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);
}
有關詳細信息,請檢查以下頁面: onMeasure自定義視圖說明 。
對不起,打擾你。
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