[英]When I use R.styleable in a custom view class, I get a red Unresolved reference: styleable
[英]Custom view crash with float or fraction styleable resources
自定義視圖:
class BarView : View {
private var mBarPaint = Paint(ANTI_ALIAS_FLAG)
private var mBarWidthRatio = 0f
private var mBarColor = Color.BLACK
var barWidthRatio
get() = mBarWidthRatio
set(value) {
mBarWidthRatio = value
invalidate()
}
var barColor
get() = mBarColor
set(value) {
mBarColor = value
invalidate()
}
constructor(context: Context) : super(context)
constructor(context: Context, attrs: AttributeSet) : super(context, attrs) {
context.obtainStyledAttributes(attrs, R.styleable.BarView).apply {
mBarWidthRatio = getFloat(R.styleable.BarView_barColor, 0f)
mBarColor = getColor(R.styleable.BarView_barWidthRatio, 0)
recycle()
}
}
override fun onDraw(canvas: Canvas) {
mBarPaint.color = mBarColor
canvas.drawRect(0f, 0f, width * mBarWidthRatio, height.toFloat(), mBarPaint)
}
}
風格化資源:
<resources>
<declare-styleable name="BarView">
<attr name="barColor" format="color" />
<attr name="barWidthRatio" format="float" />
</declare-styleable>
</resources>
活動 XML:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/myLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_begin="134dp" />
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@+id/guideline"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<com.example.barchart2.BarView
android:id="@+id/bar"
android:layout_width="200dp"
android:layout_height="50dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="@+id/guideline"
app:layout_constraintTop_toTopOf="parent"
app:barWidthRatio="0.75" />
</androidx.constraintlayout.widget.ConstraintLayout>
活動類:
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
bar.setBackgroundColor(-10000)
button.setOnClickListener() {
println("Width: " + bar.width)
println("Height: " + bar.height)
println("Left: " + bar.left)
println("Top: " + bar.top)
println("Right: " + bar.right)
println("Bottom: " + bar.bottom)
}
}
}
我收到以下錯誤:
“無法啟動活動 ComponentInfo{com.example.barchart2/com.example.barchart2.MainActivity}:android.view.InflateException:二進制 XML 文件第 28 行:二進制 XML 文件第 28 行:錯誤膨脹類 com.example.barchart2 .BarView”
它正在處理整數或字符串資源,而不是浮點數或分數。
發現我的錯誤: mBarWidthRatio = getFloat(R.styleable. BarView_barColor , 0f) mBarColor = getColor(R.styleable. BarView_barWidthRatio , 0) 混合了顏色和比例。
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