Question

我正在尝试制作一个如下所示的绘图应用程序： user inter face

因此，当用户将手放在表面视图中时，用户将能够在表面视图内绘制线条。 XML：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Paint"
    android:layout_marginTop="10sp"
    android:layout_marginLeft="5sp"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:layout_weight="3" />
<TextView
        android:id="@+id/textV"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_marginTop="20dip"
        android:layout_toRightOf="@+id/ivImage"
        android:text="User Name"

         />
        <ImageView
        android:id="@+id/ivImage"
        android:layout_width="50dp"
        android:layout_height="match_parent"
        android:src="@drawable/person"
         />


       </LinearLayout>

       <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="horizontal"
        android:layout_marginTop="20sp">

       <ScrollView
       android:id="@+id/scrollView1"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content" >

       <LinearLayout
       android:layout_width="wrap_content"
       android:layout_height="match_parent"
       android:orientation="vertical" >

       <TextView
        android:id="@+id/textView2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Assets Models" 
        android:gravity="center"/>

       <Button
        android:id="@+id/button1"
        android:layout_width="match_parent"
        android:drawableLeft="@drawable/ic_launcher"
        android:layout_height="wrap_content"
        android:text="Button" />

        </LinearLayout>
        </ScrollView>

        <SurfaceView
         android:id="@+id/surfaceView1"
         android:layout_width="wrap_content"
         android:layout_height="match_parent"
         android:layout_weight="2" />

        <ScrollView
         android:id="@+id/scrollView2"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content" >

        <LinearLayout
         android:layout_width="wrap_content"
         android:layout_height="match_parent"
         android:orientation="vertical"
         android:layout_gravity="right" >

       <TextView
        android:id="@+id/textView3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="Assets Models" />

       <Button
        android:id="@+id/button2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:drawableLeft="@drawable/ic_launcher"
        android:text="Button" />

       </LinearLayout>
       </ScrollView>
       </LinearLayout>



       </LinearLayout>

有没有人知道如何使用surfaceview或已经在xml文件中定义的视图而不是动态的方式，所以我可以将那些额外的元素，例如按钮，滚动，用户名和图像放在同一个活动中。我真的很感激任何帮助。感谢

Answer 1

要管理它，您可以按照以下步骤操作。

创建一个java类并使用SurfaceView扩展它。
使用以下代码

并将其用作＆＃34; yourlayout.xml＆＃34;

中的UI组件

public class mySurfaceView extends SurfaceView {

  public static Paint mPaint;
  public static Path path;
  public static Bitmap mBitmap;
  public static Canvas mCanvas;
  private ArrayList<PathWithPaint> _graphics1 = new ArrayList<PathWithPaint>();

  public mySurfaceView(Context context, AttributeSet attrs) {
    super(context, attrs);
    path = new Path();
    mBitmap = Bitmap.createBitmap(820, 480, Bitmap.Config.ARGB_8888);
    mCanvas = new Canvas(mBitmap);
    this.setBackgroundColor(Color.BLACK);
    mPaint = new Paint();
    mPaint.setDither(true);
    mPaint.setColor(0xFFFFFF00);
    mPaint.setStyle(Paint.Style.STROKE);
    mPaint.setStrokeJoin(Paint.Join.ROUND);
    mPaint.setStrokeCap(Paint.Cap.ROUND);
    mPaint.setStrokeWidth(3);
  }

  @Override
  public boolean onTouchEvent(MotionEvent event) {
    PathWithPaint pp = new PathWithPaint();
    mCanvas.drawPath(path, mPaint);
    if (event.getAction() == MotionEvent.ACTION_DOWN) {
      path.moveTo(event.getX(), event.getY());
      path.lineTo(event.getX(), event.getY());
    } else if (event.getAction() == MotionEvent.ACTION_MOVE) {
      path.lineTo(event.getX(), event.getY());
      pp.setPath(path);
      pp.setmPaint(mPaint);
      _graphics1.add(pp);
    }
    invalidate();
    return true;
  }

  @Override
  protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    if (_graphics1.size() > 0) {
      canvas.drawPath(_graphics1.get(_graphics1.size() - 1).getPath(),
            _graphics1.get(_graphics1.size() - 1).getmPaint());
    }
  }

  public class PathWithPaint {
    private Path path;
    public Path getPath() {
      return path;
    }
    public void setPath(Path path) {
      this.path = path;
    }
    private Paint mPaint;
    public Paint getmPaint() {
      return mPaint;
    }
    public void setmPaint(Paint mPaint) {
      this.mPaint = mPaint;
    }
  }
}

现在我将在布局中使用它

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"       android:layout_width="match_parent"
    android:layout_height="match_parent"    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"     tools:context=".MainActivity">

<ayttunc.example.com.drawingstackoverflow.mySurfaceView
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

</RelativeLayout>

然后你运行它但是我想让你注意到我们没有在MainActivity中编写任何代码，并且在你运行之后你会看到类似的东西！

http://i.stack.imgur.com/YjGk6.png

如果您想了解更多信息，可以发送邮件给我 aytuncmatrac@anadolu.edu.tr。

如何在表面视图上绘图？

1 个答案: