SurfaceView在ScrollView里面滑动出现黑色背景

大家都叫我七哥 2013-10-08 11:59:55

布局文件：

<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"

    tools:context=".MainActivity" >

    <LinearLayout 

        android:layout_width="fill_parent"

        android:layout_height="47dp"

        android:background="#fff"

        android:layout_alignParentTop="true"

        android:id="@+id/top"

        ><TextView 

            android:layout_width="fill_parent"

            android:layout_height="47dp"

            android:text="hello"/>

    </LinearLayout>

    <ScrollView 

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:id="@+id/scrollview"

        android:layout_below="@+id/top">

        <RelativeLayout 

            android:layout_width="fill_parent"

            android:layout_height="wrap_content">

     <com.example.com.qige.demo.MyView

         android:layout_width="fill_parent"

        android:layout_height="450dp"

        android:id="@+id/surfaceview"

        ></com.example.com.qige.demo.MyView> 

    <TextView 

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:layout_below="@+id/surfaceview"

        android:background="#fff"

        android:text="1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111"/>

    </RelativeLayout>

    </ScrollView>



</RelativeLayout>

MyView代码：

//内部类   

class MyView extends SurfaceView implements SurfaceHolder.Callback {



	SurfaceHolder holder;



	public MyView(Context context) {

		super(context);

		holder = this.getHolder();// 获取holder

		holder.addCallback(this);

		// setFocusable(true);



	}

	

	 public MyView(Context context,AttributeSet attrs)  

     {  

         super(context,attrs);  

 		 holder = this.getHolder();// 获取holder

 		 holder.addCallback(this);

// 		setZOrderOnTop(true);

// 		holder.setFormat(PixelFormat.TRANSLUCENT);

     }



	@Override

	public void surfaceChanged(SurfaceHolder holder, int format, int width,

			int height) {



	}



	@Override

	public void surfaceCreated(SurfaceHolder holder) {

		new Thread(new MyThread()).start();

	}



	@Override

	public void surfaceDestroyed(SurfaceHolder holder) {



	}



	// 内部类的内部类

	class MyThread implements Runnable {



		@Override

		public void run() {

			Canvas canvas = holder.lockCanvas(null);// 获取画布

			Paint mPaint = new Paint();

			mPaint.setColor(Color.BLUE);



			canvas.drawRect(new RectF(0, 0, 540, 780), mPaint);

			holder.unlockCanvasAndPost(canvas);// 解锁画布，提交画好的图像



		}



	}



}