LineBreaker Class
Definition
Important
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Provides automatic line breaking for a <em>single</em> paragraph.
[Android.Runtime.Register("android/graphics/text/LineBreaker", ApiSince=29, DoNotGenerateAcw=true)]
public class LineBreaker : Java.Lang.Object[<Android.Runtime.Register("android/graphics/text/LineBreaker", ApiSince=29, DoNotGenerateAcw=true)>]
type LineBreaker = class
inherit Object- Inheritance
- Attributes
Remarks
Provides automatic line breaking for a <em>single</em> paragraph.
<code>
Paint paint = new Paint();
Paint bigPaint = new Paint();
bigPaint.setTextSize(paint.getTextSize() * 2.0);
String text = "Hello, Android.";
// Prepare the measured text
MeasuredText mt = new MeasuredText.Builder(text.toCharArray())
.appendStyleRun(paint, 7, false) // Use paint for "Hello, "
.appednStyleRun(bigPaint, 8, false) // Use bigPaint for "Hello, "
.build();
LineBreaker lb = new LineBreaker.Builder()
// Use simple line breaker
.setBreakStrategy(LineBreaker.BREAK_STRATEGY_SIMPLE)
// Do not add hyphenation.
.setHyphenationFrequency(LineBreaker.HYPHENATION_FREQUENCY_NONE)
// Build the LineBreaker
.build();
ParagraphConstraints c = new ParagraphConstraints();
c.setWidth(240); // Set the line wieth as 1024px
// Do the line breaking
Result r = lb.computeLineBreaks(mt, c, 0);
// Compute the total height of the text.
float totalHeight = 0;
for (int i = 0; i < r.getLineCount(); ++i) { // iterate over the lines
totalHeight += r.getLineDescent(i) - r.getLineAscent(i);
}
// Draw text to the canvas
Bitmap bmp = Bitmap.createBitmap(240, totalHeight, Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(bmp);
float yOffset = 0f;
int prevOffset = 0;
for (int i = 0; i < r.getLineCount(); ++i) { // iterate over the lines
int nextOffset = r.getLineBreakOffset(i);
c.drawText(text, prevOffset, nextOffset, 0f, yOffset, paint);
prevOffset = nextOffset;
yOffset += r.getLineDescent(i) - r.getLineAscent(i);
}
</code>
</p>
Java documentation for android.graphics.text.LineBreaker.
Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.
Constructors
| LineBreaker(IntPtr, JniHandleOwnership) |
Fields
| BreakStrategyBalanced |
Obsolete.
Value for break strategy indicating balanced line breaking. |
| BreakStrategyHighQuality |
Obsolete.
Value for break strategy indicating high quality line breaking. |
| BreakStrategySimple |
Obsolete.
Value for break strategy indicating simple line breaking. |
| HyphenationFrequencyFull |
Obsolete.
Value for hyphenation frequency indicating the full amount of automatic hyphenation. |
| HyphenationFrequencyNone |
Obsolete.
Value for hyphenation frequency indicating no automatic hyphenation. |
| HyphenationFrequencyNormal |
Obsolete.
Value for hyphenation frequency indicating a light amount of automatic hyphenation. |
| JustificationModeInterWord |
Obsolete.
Value for justification mode indicating the text is justified by stretching word spacing. |
| JustificationModeNone |
Obsolete.
Value for justification mode indicating no justification. |
Properties
| Class |
Returns the runtime class of this |
| Handle |
The handle to the underlying Android instance. (Inherited from Object) |
| JniIdentityHashCode | (Inherited from Object) |
| JniPeerMembers | |
| PeerReference | (Inherited from Object) |
| ThresholdClass | |
| ThresholdType | |
Methods
| Clone() |
Creates and returns a copy of this object. (Inherited from Object) |
| ComputeLineBreaks(MeasuredText, LineBreaker+ParagraphConstraints, Int32) |
Break paragraph into lines. |
| Dispose() | (Inherited from Object) |
| Dispose(Boolean) | (Inherited from Object) |
| Equals(Object) |
Indicates whether some other object is "equal to" this one. (Inherited from Object) |
| GetHashCode() |
Returns a hash code value for the object. (Inherited from Object) |
| JavaFinalize() |
Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. (Inherited from Object) |
| Notify() |
Wakes up a single thread that is waiting on this object's monitor. (Inherited from Object) |
| NotifyAll() |
Wakes up all threads that are waiting on this object's monitor. (Inherited from Object) |
| SetHandle(IntPtr, JniHandleOwnership) |
Sets the Handle property. (Inherited from Object) |
| ToArray<T>() | (Inherited from Object) |
| ToString() |
Returns a string representation of the object. (Inherited from Object) |
| UnregisterFromRuntime() | (Inherited from Object) |
| Wait() |
Causes the current thread to wait until it is awakened, typically by being <em>notified</em> or <em>interrupted</em>. (Inherited from Object) |
| Wait(Int64, Int32) |
Causes the current thread to wait until it is awakened, typically by being <em>notified</em> or <em>interrupted</em>, or until a certain amount of real time has elapsed. (Inherited from Object) |
| Wait(Int64) |
Causes the current thread to wait until it is awakened, typically by being <em>notified</em> or <em>interrupted</em>, or until a certain amount of real time has elapsed. (Inherited from Object) |
Explicit Interface Implementations
| IJavaPeerable.Disposed() | (Inherited from Object) |
| IJavaPeerable.DisposeUnlessReferenced() | (Inherited from Object) |
| IJavaPeerable.Finalized() | (Inherited from Object) |
| IJavaPeerable.JniManagedPeerState | (Inherited from Object) |
| IJavaPeerable.SetJniIdentityHashCode(Int32) | (Inherited from Object) |
| IJavaPeerable.SetJniManagedPeerState(JniManagedPeerStates) | (Inherited from Object) |
| IJavaPeerable.SetPeerReference(JniObjectReference) | (Inherited from Object) |
Extension Methods
| JavaCast<TResult>(IJavaObject) |
Performs an Android runtime-checked type conversion. |
| JavaCast<TResult>(IJavaObject) | |
| GetJniTypeName(IJavaPeerable) | |