制作背景＆＃34;透明＆＃34;以编程方式在Android中
我遇到以下问题。如何摆脱屏幕截图中的红色背景;换句话说，我想在下面的屏幕截图中使红色背景透明（透明）：
在Android上运行的应用：
以下是xml代码，它定义了我想要更改的屏幕部分：
<com.flares.HashCircleMenuLayout
android:id="@+id/id_menulayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="bottom"
android:padding="100dp">
<!--android:background="@drawable/circle_bg3"-->
<RelativeLayout
android:id="@id/id_circle_menu_item_center"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<ImageView
android:layout_width="104.0dip"
android:layout_height="104.0dip"
android:layout_centerInParent="true"
android:background="@drawable/turnplate_center_unlogin" />
<ImageView
android:layout_width="116.0dip"
android:layout_height="116.0dip"
android:layout_centerInParent="true"
android:background="@drawable/turnplate_mask_unlogin_normal" />
</RelativeLayout>
</com.flares.HashCircleMenuLayout>
另外，HashCircleMenuLayout代码：
public class HashCircleMenuLayout扩展了ViewGroup
{
private int mRadius;
private static final float RADIO_DEFAULT_CHILD_DIMENSION = 1 / 4f;
private float RADIO_DEFAULT_CENTERITEM_DIMENSION = 1 / 3f;
private static final float RADIO_PADDING_LAYOUT = 1 / 12f;
private static final int FLINGABLE_VALUE = 300;
private static final int NOCLICK_VALUE = 3;
private int mFlingableValue = FLINGABLE_VALUE;
private float mPadding;
private double mStartAngle = 0;
private String[] mItemTexts;
private int[] mItemImgs;
private int mMenuItemCount;
private float mTmpAngle;
private long mDownTime;
private boolean isFling;
private int mMenuItemLayoutId = R.layout.circle_menu_item;
public HashCircleMenuLayout(Context context, AttributeSet attrs)
{
super(context, attrs);
setPadding(0, 0, 0, 0);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
int resWidth = 0;
int resHeight = 0;
int width = MeasureSpec.getSize(widthMeasureSpec);
int widthMode = MeasureSpec.getMode(widthMeasureSpec);
int height = MeasureSpec.getSize(heightMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
if (widthMode != MeasureSpec.EXACTLY
|| heightMode != MeasureSpec.EXACTLY)
{
resWidth = getSuggestedMinimumWidth();
resWidth = resWidth == 0 ? getDefaultWidth() : resWidth;
resHeight = getSuggestedMinimumHeight();
resHeight = resHeight == 0 ? getDefaultWidth() : resHeight;
} else
{
resWidth = resHeight = Math.min(width, height);
}
setMeasuredDimension(resWidth, resHeight);
mRadius = Math.max(getMeasuredWidth(), getMeasuredHeight());
final int count = getChildCount();
int childSize = (int) (mRadius * RADIO_DEFAULT_CHILD_DIMENSION);
int childMode = MeasureSpec.EXACTLY;
for (int i = 0; i < count; i++)
{
final View child = getChildAt(i);
if (child.getVisibility() == GONE)
{
continue;
}
int makeMeasureSpec = -1;
if (child.getId() == R.id.id_circle_menu_item_center)
{
makeMeasureSpec = MeasureSpec.makeMeasureSpec((int) (mRadius * RADIO_DEFAULT_CENTERITEM_DIMENSION),childMode);
} else
{
makeMeasureSpec = MeasureSpec.makeMeasureSpec(childSize,childMode);
}
child.measure(makeMeasureSpec, makeMeasureSpec);
}
mPadding = RADIO_PADDING_LAYOUT * mRadius;
}
public interface OnMenuItemClickListener
{
void itemClick(View view, int pos);
void itemCenterClick(View view);
}
private OnMenuItemClickListener mOnMenuItemClickListener;
public void setOnMenuItemClickListener(
OnMenuItemClickListener mOnMenuItemClickListener)
{
this.mOnMenuItemClickListener = mOnMenuItemClickListener;
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b)
{
int layoutRadius = mRadius;
final int childCount = getChildCount();
int left, top;
int cWidth = (int) (layoutRadius * RADIO_DEFAULT_CHILD_DIMENSION);
float angleDelay = 360 / (getChildCount() - 1);
for (int i = 0; i < childCount; i++)
{
final View child = getChildAt(i);
if (child.getId() == R.id.id_circle_menu_item_center)
continue;
if (child.getVisibility() == GONE)
{
continue;
}
mStartAngle %= 360;
float tmp = layoutRadius / 2f - cWidth / 2 - mPadding;
left = layoutRadius / 2 + (int) Math.round(tmp* Math.cos(Math.toRadians(mStartAngle)) - 1 / 2f* cWidth);
top = layoutRadius / 2 + (int) Math.round(tmp* Math.sin(Math.toRadians(mStartAngle)) - 1 / 2f* cWidth);
child.layout(left, top, left + cWidth, top + cWidth);
mStartAngle += angleDelay;
}
View cView = findViewById(R.id.id_circle_menu_item_center);
if (cView != null)
{
cView.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
if (mOnMenuItemClickListener != null)
{
mOnMenuItemClickListener.itemCenterClick(v);
}
}
});
int cl = layoutRadius / 2 - cView.getMeasuredWidth() / 2;
int cr = cl + cView.getMeasuredWidth();
cView.layout(cl, cl, cr, cr);
}
}
private float mLastX;
private float mLastY;
private AutoFlingRunnable mFlingRunnable;
@Override
public boolean dispatchTouchEvent(MotionEvent event)
{
float x = event.getX();
float y = event.getY();
switch (event.getAction())
{
case MotionEvent.ACTION_DOWN:
mLastX = x;
mLastY = y;
mDownTime = System.currentTimeMillis();
mTmpAngle = 0;
if (isFling)
{
removeCallbacks(mFlingRunnable);
isFling = false;
return true;
}
break;
case MotionEvent.ACTION_MOVE:
float start = getAngle(mLastX, mLastY);
float end = getAngle(x, y);
if (getQuadrant(x, y) == 1 || getQuadrant(x, y) == 4)
{
mStartAngle += end - start;
mTmpAngle += end - start;
} else
{
mStartAngle += start - end;
mTmpAngle += start - end;
}
requestLayout();
mLastX = x;
mLastY = y;
break;
case MotionEvent.ACTION_UP:
float anglePerSecond = mTmpAngle * 1000
/ (System.currentTimeMillis() - mDownTime);
if (Math.abs(anglePerSecond) > mFlingableValue && !isFling)
{
post(mFlingRunnable = new AutoFlingRunnable(anglePerSecond));
return true;
}
if (Math.abs(mTmpAngle) > NOCLICK_VALUE)
{
return true;
}
break;
}
return super.dispatchTouchEvent(event);
}
@Override
public boolean onTouchEvent(MotionEvent event)
{
return true;
}
private float getAngle(float xTouch, float yTouch)
{
double x = xTouch - (mRadius / 2d);
double y = yTouch - (mRadius / 2d);
return (float) (Math.asin(y / Math.hypot(x, y)) * 180 / Math.PI);
}
private int getQuadrant(float x, float y)
{
int tmpX = (int) (x - mRadius / 2);
int tmpY = (int) (y - mRadius / 2);
if (tmpX >= 0)
{
return tmpY >= 0 ? 4 : 1;
} else
{
return tmpY >= 0 ? 3 : 2;
}
}
public void setMenuItemIconsAndTexts(int[] resIds, String[] texts)
{
mItemImgs = resIds;
mItemTexts = texts;
if (resIds == null && texts == null)
{
throw new IllegalArgumentException("��项文本和图片至少设置其一");
}
mMenuItemCount = resIds == null ? texts.length : resIds.length;
if (resIds != null && texts != null)
{
mMenuItemCount = Math.min(resIds.length, texts.length);
}
addMenuItems();
}
public void setMenuItemLayoutId(int mMenuItemLayoutId)
{
this.mMenuItemLayoutId = mMenuItemLayoutId;
}
private void addMenuItems()
{
LayoutInflater mInflater = LayoutInflater.from(getContext());
for (int i = 0; i < mMenuItemCount; i++)
{
final int j = i;
View view = mInflater.inflate(mMenuItemLayoutId, this, false);
ImageView iv = (ImageView) view
.findViewById(R.id.id_circle_menu_item_image);
TextView tv = (TextView) view
.findViewById(R.id.id_circle_menu_item_text);
if (iv != null)
{
iv.setVisibility(View.VISIBLE);
iv.setImageResource(mItemImgs[i]);
iv.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
if (mOnMenuItemClickListener != null)
{
mOnMenuItemClickListener.itemClick(v, j);
}
}
});
}
if (tv != null)
{
tv.setVisibility(View.VISIBLE);
tv.setText(mItemTexts[i]);
}
addView(view);
}
}
public void setFlingableValue(int mFlingableValue)
{
this.mFlingableValue = mFlingableValue;
}
public void setPadding(float mPadding)
{
this.mPadding = mPadding;
}
private int getDefaultWidth()
{
WindowManager wm = (WindowManager) getContext().getSystemService(
Context.WINDOW_SERVICE);
DisplayMetrics outMetrics = new DisplayMetrics();
wm.getDefaultDisplay().getMetrics(outMetrics);
return Math.min(outMetrics.widthPixels, outMetrics.heightPixels);
}
private class AutoFlingRunnable implements Runnable
{
private float angelPerSecond;
public AutoFlingRunnable(float velocity)
{
this.angelPerSecond = velocity;
}
public void run()
{
if ((int) Math.abs(angelPerSecond) < 20)
{
isFling = false;
return;
}
isFling = true;
mStartAngle += (angelPerSecond / 30);
angelPerSecond /= 1.0666F;
postDelayed(this, 30);
requestLayout();
}
}
}
必须有一种方法可以通过编程方式或通过更改xml来完成上述操作，但我不确定。请帮忙。
1 个答案:
答案 0 :(得分：1)
我使用android清单文件中的“android：theme”标签为我的所有活动使用了一个主题
<application
android:label="@string/app_name"
android:icon="@mipmap/icon_launcher"
android:roundIcon="@mipmap/icon_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme"
android:allowBackup="true" >
<activity></activity>`
我在文件“colors.xml”中定义了40％透明色的红色。
标签“颜色名称= red_transparent”＆gt;＃ 40 FF0000“
数字40的透明度为40％，FF0000为红色。
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="colorPrimary">#3cb912</color>
<color name="colorPrimaryDark">#303F9F</color>
<color name="colorAccent">#FF4081</color>
<color name="red_transparent">#40FF0000</color>
</resources>
然后我编辑styles.xml来编辑我的主题以满足我的需要，标签，
“android：background”用red_transparent颜色定义
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
<item name="android:windowFullscreen">true</item>
<item name="android:background">@color/red_transparent</item>
</style>
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