如何在自定义视图中正确设置ColorC
我创建了一个自定义视图，例如裁剪视图，在我的应用中用于定义裁剪区域。但该应用程序在充气视图时崩溃。可能是我还没有理解如何正确使用setColor。我尝试过使用：BoxPaint.setColor(AppShared.gResources.getColor(R.color.bwff_60))，该应用仍然崩溃了。请告诉我我应该在代码中做出的所有更改，以便我能够看到该视图。
logcat的：
main.xml中
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:custom="http://schemas.android.com/apk/com.md.areadectest"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<FrameLayout
android:id="@+id/layoutMain" android:layout_width="wrap_content" android:layout_height="wrap_content">
<RelativeLayout android:layout_width="@dimen/width_320" android:layout_height="@dimen/width_240" android:layout_centerInParent="true">
<SurfaceView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/preview">
</SurfaceView>
<FrameLayout android:layout_gravity="center" android:id="@+id/layoutDetectArea" android:background="@color/blue" android:layout_width="match_parent" android:layout_height="match_parent">
<com.md.areadectest.AreaDetectorView android:id="@+id/viewDetector" android:layout_width="match_parent" android:layout_height="match_parent" />
</FrameLayout>
</RelativeLayout>
</FrameLayout>
<LinearLayout
android:layout_below="@id/layoutMain"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:gravity="center">
</LinearLayout>
<ImageView android:id="@+id/myImageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_android_black_24dp"
android:layout_alignParentBottom="true"
android:layout_alignParentEnd="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/trigcount"
android:layout_alignTop="@+id/myImageView"
android:layout_centerHorizontal="true"
android:textColor="@android:color/white" />
</RelativeLayout>
View.java
public class AreaDetectorView extends LinearLayout {
public static int Width;
public static int Height;
private static Paint BoxPaint = null;
private static Paint BoxPaint2 = null;
private static Paint TextPaint = null;
private static Paint ArrowPaint = null;
private static Path mPath = null;
private static Rect mRect = null;
private static int lastX, lastY = 0;
private static boolean mBoxTouched = false;
private static boolean mArrowTouched = false;
private static Context mContext;
private static int ArrowWidth = 0;
public AreaDetectorView(Context context) {
super(context);
}
//attrs was not there
public AreaDetectorView(Context context, AttributeSet attrs) {
super(context,attrs);
// TODO Auto-generated constructor stub
if (!this.getRootView().isInEditMode()) {
ArrowWidth =GetDisplayPixel(context, 30);
}
//InitDetectionArea();
InitMemberVariables();
setWillNotDraw(false);
}
public static int GetDisplayPixel(Context paramContext, int paramInt)
{
return (int)(paramInt * paramContext.getResources().getDisplayMetrics().density + 0.5F);
}
public static void InitMemberVariables() {
if (BoxPaint == null) {
BoxPaint = new Paint();
BoxPaint.setAntiAlias(true);
BoxPaint.setStrokeWidth(2.0f);
//BoxPaint.setStyle(Style.STROKE);
BoxPaint.setStyle(Style.FILL_AND_STROKE);
BoxPaint.setColor(ContextCompat.getColor(mContext, R.color.bwff_60));
}
if (ArrowPaint == null) {
ArrowPaint = new Paint();
ArrowPaint.setAntiAlias(true);
ArrowPaint.setColor(ContextCompat.getColor(mContext,R.color.redDD));
ArrowPaint.setStyle(Style.FILL_AND_STROKE);
}
if (TextPaint == null) {
TextPaint = new Paint();
TextPaint.setColor(ContextCompat.getColor(mContext,R.color.yellowL));
TextPaint.setTextSize(16);
//txtPaint.setTypeface(lcd);
TextPaint.setStyle(Style.FILL_AND_STROKE);
}
if (mPath == null) {
mPath = new Path();
} else {
mPath.reset();
}
if (mRect == null) {
mRect = new Rect();
}
if (BoxPaint2 == null) {
BoxPaint2 = new Paint();
BoxPaint2.setAntiAlias(true);
BoxPaint2.setStrokeWidth(2.0f);
//BoxPaint.setStyle(Style.STROKE);
BoxPaint2.setStyle(Style.STROKE);
BoxPaint2.setColor(ContextCompat.getColor(mContext,R.color.bwff_9e));
}
}
public static void InitDetectionArea() {
try {
int w = Preferences.DetectionArea.width();
int h = Preferences.DetectionArea.height();
int x = Preferences.DetectionArea.left;
int y = Preferences.DetectionArea.top;
// ver 2.6.0
if (Preferences.DetectionArea.left == 1
&& Preferences.DetectionArea.top == 1
&& Preferences.DetectionArea.right == 1
&& Preferences.DetectionArea.bottom == 1) {
w = Preferences.DisplayWidth / 4;
h = Preferences.DisplayHeight / 3;
// ver 2.5.9
w = Width / 4;
h = Height / 3;
Preferences.DetectorWidth = w;
Preferences.DetectorHeight = h;
x = (Preferences.DisplayWidth / 2) - (w / 2);
y = (Preferences.DisplayHeight / 2) - (h / 2);
// ver 2.5.9
x = (Width / 2) - (w / 2);
y = (Height / 2) - (h / 2);
}
//Preferences.DetectionArea = new Rect(x, x, x + Preferences.DetectorWidth, x + Preferences.DetectorHeight);
Preferences.DetectionArea = new Rect(x, y, x + w, y + h);
Preferences.gDetectionBitmapInt = new int[Preferences.DetectionArea.width() * Preferences.DetectionArea.height()];
Preferences.gDetectionBitmapIntPrev = new int[Preferences.DetectionArea.width() * Preferences.DetectionArea.height()];
} catch (Exception e) {
e.printStackTrace();
}
}
public static void SetDetectionArea(int x, int y, int w, int h) {
try {
Preferences.DetectionArea = new Rect(x, y, w, h);
} catch (Exception e) {
e.printStackTrace();
}
}
private void DrawAreaBox(Canvas canvas) {
try {
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
protected void dispatchDraw(Canvas canvas) {
try {
if (this.getRootView().isInEditMode()) {
super.dispatchDraw(canvas);
return;
}
//Preferences.DetectionAreaOrient = UtilGeneralHelper.GetDetectRectByOrientation();
canvas.drawColor(0);
mPath.reset();
canvas.drawRect(Preferences.DetectionArea, BoxPaint);
mPath.moveTo(Preferences.DetectionArea.right - ArrowWidth, Preferences.DetectionArea.bottom);
mPath.lineTo(Preferences.DetectionArea.right, Preferences.DetectionArea.bottom - ArrowWidth);
mPath.lineTo(Preferences.DetectionArea.right, Preferences.DetectionArea.bottom);
mPath.lineTo(Preferences.DetectionArea.right - ArrowWidth, Preferences.DetectionArea.bottom);
mPath.close();
canvas.drawPath(mPath, ArrowPaint);
mPath.reset();
//canvas.drawRect(Preferences.DetectionAreaOrient, BoxPaint2);
//canvas.drawRect(Preferences.DetectionAreaOrientPort, BoxPaint2);
TextPaint.setTextSize(16);
TextPaint.setColor(ContextCompat.getColor(mContext,R.color.bwff));
TextPaint.getTextBounds(getResources().getString(R.string.str_detectarea), 0, 1, mRect);
canvas.drawText(getResources().getString(R.string.str_detectarea),
Preferences.DetectionArea.left + 4,
Preferences.DetectionArea.top + 4 + mRect.height(),
TextPaint);
int recH = mRect.height();
TextPaint.setStrokeWidth(1.2f);
TextPaint.setTextSize(18);
TextPaint.setColor(ContextCompat.getColor(mContext,R.color.redD_9e));
TextPaint.getTextBounds(getResources().getString(R.string.str_dragandmove), 0, 1, mRect);
canvas.drawText(getResources().getString(R.string.str_dragandmove),
Preferences.DetectionArea.left + 4,
Preferences.DetectionArea.top + 20 + mRect.height()*2,
TextPaint);
TextPaint.getTextBounds(getResources().getString(R.string.str_scalearea), 0, 1, mRect);
canvas.drawText(getResources().getString(R.string.str_scalearea),
Preferences.DetectionArea.left + 4,
Preferences.DetectionArea.top + 36 + mRect.height()*3,
TextPaint);
super.dispatchDraw(canvas);
//canvas.restore();
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
protected void onDraw(Canvas canvas) {
try {
super.onDraw(canvas);
invalidate();
} catch (Exception e) {
e.printStackTrace();
} finally {
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
boolean retValue = true;
int X = (int)event.getX();
int Y = (int)event.getY();
//AppMain.txtLoc.setText(String.valueOf(X) + ", " + String.valueOf(Y));
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
mBoxTouched = TouchedInBoxArea(X, Y);
//AppMain.txtLoc.setText("BoxTouched: " + String.valueOf(mBoxTouched));
if (!mBoxTouched) break;
lastX = X;
lastY = Y;
BoxPaint.setStyle(Style.FILL_AND_STROKE);
BoxPaint.setColor(ContextCompat.getColor(mContext,R.color.redD_9e));
mArrowTouched = TouchedInArrow(X, Y);
//AppMain.txtLoc.setText("ArrowTouched: " + String.valueOf(mBoxTouched));
if (mArrowTouched) {
ArrowPaint.setColor(ContextCompat.getColor(mContext,R.color.bwff_9e));
}
break;
case MotionEvent.ACTION_MOVE:
if (!mBoxTouched) break;
int moveX = X - lastX;
int moveY = Y - lastY;
//AppMain.txtLoc.setText("Move X, Y: " + String.valueOf(moveX) + "," + String.valueOf(moveY));
if (!mArrowTouched) {
if (Preferences.DetectionArea.left + moveX < 0) {
break;
}
// if (Preferences.DetectionArea.right + moveX > Preferences.gDisplay.getWidth()) {
// break;
// }
// ver 2.5.9
if (Preferences.DetectionArea.right + moveX > Width) {
break;
}
if (Preferences.DetectionArea.top + moveY < 0) {
break;
}
// if (Preferences.DetectionArea.bottom + moveY > Preferences.gDisplay.getHeight()) {
// break;
// }
// ver 2.5.9
if (Preferences.DetectionArea.bottom + moveY > Height) {
break;
}
}
if (mArrowTouched) {
if ((Preferences.DetectionArea.width() + moveX) < ArrowWidth * 2){
break;
}
if ((Preferences.DetectionArea.height() + moveY) < ArrowWidth * 2) {
break;
}
Preferences.DetectionArea.right += moveX;
Preferences.DetectionArea.bottom += moveY;
//Log.i("DBG", "W,H: " + String.valueOf(Preferences.DetectionArea.width()) + "," + String.valueOf(Preferences.DetectionArea.height()));
} else {
Preferences.DetectionArea.left += moveX;
Preferences.DetectionArea.right += moveX;
Preferences.DetectionArea.top += moveY;
Preferences.DetectionArea.bottom += moveY;
}
lastX = X;
lastY = Y;
//AppMain.txtLoc.setText(String.valueOf(Preferences.DetectionArea.left) + ", " + String.valueOf(Preferences.DetectionArea.top));
break;
case MotionEvent.ACTION_UP:
mBoxTouched = false;
mArrowTouched = false;
//BoxPaint.setStyle(Style.STROKE);
BoxPaint.setStyle(Style.FILL_AND_STROKE);
BoxPaint.setColor(ContextCompat.getColor(mContext,R.color.bwff_60));
ArrowPaint.setColor(ContextCompat.getColor(mContext,R.color.redDD));
//AppMain.txtLoc.setText(String.valueOf(Preferences.DetectionArea.left) + ", " + String.valueOf(Preferences.DetectionArea.top));
if (Preferences.DetectionArea.left < 0) {
Preferences.DetectionArea.left = 0;
}
// if (Preferences.DetectionArea.right > Preferences.gDisplay.getWidth()) {
// Preferences.DetectionArea.right = Preferences.gDisplay.getWidth();
// }
// ver 2.5.9
if (Preferences.DetectionArea.right > Width) {
Preferences.DetectionArea.right = Width;
}
if (Preferences.DetectionArea.top < 0) {
Preferences.DetectionArea.top = 0;
}
// if (Preferences.DetectionArea.bottom > Preferences.gDisplay.getHeight()) {
// Preferences.DetectionArea.bottom = Preferences.gDisplay.getHeight();
// }
if (Preferences.DetectionArea.bottom > Height) {
Preferences.DetectionArea.bottom = Height;
}
Preferences.gDetectionBitmapInt = new int[Preferences.DetectionArea.width() * Preferences.DetectionArea.height()];
Preferences.gDetectionBitmapIntPrev = new int[Preferences.DetectionArea.width() * Preferences.DetectionArea.height()];
//Preferences.gDetectionBitmapInt = null;
//Preferences.gDetectionBitmapIntPrev = null;
String area = String.valueOf(Preferences.DetectionArea.left)
+ "," + String.valueOf(Preferences.DetectionArea.top)
+ "," + String.valueOf(Preferences.DetectionArea.right)
+ "," + String.valueOf(Preferences.DetectionArea.bottom);
// UtilGeneralHelper.SavePreferenceSetting(Preferences.gContext, Preferences.PREF_DETECTION_AREA_KEY, area);
break;
}
invalidate();
return retValue;
}
private boolean TouchedInBoxArea(int x, int y) {
boolean retValue = false;
try {
if (x > Preferences.DetectionArea.left && x < Preferences.DetectionArea.right) {
if (y > Preferences.DetectionArea.top && y < Preferences.DetectionArea.bottom) {
retValue = true;
}
}
} catch (Exception e) {
e.printStackTrace();
}
return retValue;
}
private boolean TouchedInArrow(int x, int y) {
boolean retValue = false;
try {
if (x > Preferences.DetectionArea.right - ArrowWidth && x < Preferences.DetectionArea.right) {
if (y > Preferences.DetectionArea.bottom - ArrowWidth && y < Preferences.DetectionArea.bottom) {
retValue = true;
}
}
} catch (Exception e) {
e.printStackTrace();
}
return retValue;
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int width = MeasureSpec.getSize(widthMeasureSpec);
int height = MeasureSpec.getSize(heightMeasureSpec);
setMeasuredDimension(width, height);
Width = width;
Height = height;
InitDetectionArea();
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
// TODO Auto-generated method stub
for (int i = 0; i < this.getChildCount()-1; i++){
(this.getChildAt(i)).layout(l, t, r, b);
}
if (changed) {
// check width height
if (r != Width || b != Height) {
// size does not match
}
}
}
}
2 个答案:
答案 0 :(得分：1)
问题是您的变量mContext为空 - 您需要在构造函数中设置mContext = context。
答案 1 :(得分：0)
试试这个：
BoxPaint.setColor(getResources().getColor(R.color.bwff_60));
颜色仅在您添加时适用 你的项目\ app \ src \ main \ res \ values \ colors.xml 文件。
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