Android的自定义栏：画在状态栏

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问：
当我用户在activity.and我的自定义视图，然后我改变定制的translationY view.And然后，自定义视图绘制状态栏。

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当我删除代码， canvas.clipRect(0, 0, getWidth(), getHeight(), Region.Op.REPLACE); 在CustomView.java，它都会好的。
但在实际情况中，我需要clipRect函数来限制。那么，我如何计算剪辑范围。

请帮我修复它。

版式文件：

<RelativeLayout 
    android:id="@+id/action_bar" 
    android:layout_width="match_parent" 
    android:layout_height="40dp" 
    android:background="#00e0e0"> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_centerInParent="true" 
     android:text="Test Title" /> 

    <TextView 
     android:id="@+id/text" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignParentRight="true" 
     android:layout_centerVertical="true" 
     android:text="up" 
     android:textSize="32dp" /> 

</RelativeLayout> 

<cn.bangnijiao.testunitdemo.CustomView 
    android:id="@+id/counterView" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_below="@id/action_bar" 
    android:layout_centerHorizontal="true" /> 

代码：

public class YActivity extends Activity { 

TextView up; 
CustomView customView; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_y); 

    up = (TextView) findViewById(R.id.text); 
    customView = (CustomView) findViewById(R.id.counterView); 

    up.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      customView.setTranslationY(customView.getTranslationY() - 20); 
     } 
    }); 

    findViewById(R.id.action_bar).bringToFront(); 
} 

}

CustomView代码：

public class CustomView extends View { 

private Paint mPaint; 
int size = 120; 

public CustomView(Context context, AttributeSet attrs) { 
    super(context, attrs); 
    mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 
} 

@Override 
protected void onDraw(Canvas canvas) { 
    super.onDraw(canvas); 
    drawSeparatorsAndBackground(canvas); 
} 

private void drawSeparatorsAndBackground(Canvas canvas) { 

    mPaint.setColor(Color.YELLOW); 
    canvas.drawRect(0, 0, getWidth(), getHeight(), mPaint); 

    canvas.clipRect(0, 0, getWidth(), getHeight(), Region.Op.REPLACE); 

    mPaint.setColor(Color.BLACK); 

    int verticalCount = (getWidth()/size); 
    float[] verticalLines = new float[verticalCount * 4]; 

    for (int i = 0; i < verticalCount; i++) { 
     verticalLines[i * 4 + 0] = i * size; 
     verticalLines[i * 4 + 1] = 0; 
     verticalLines[i * 4 + 2] = i * size; 
     verticalLines[i * 4 + 3] = getHeight(); 
    } 
    canvas.drawLines(verticalLines, mPaint); 

    int hourHorizontalCount = (getHeight()/size); 
    float[] hourHorizontalLines = new float[hourHorizontalCount * 4]; 

    for (int i = 0; i < hourHorizontalCount; i++) { 
     hourHorizontalLines[i * 4 + 0] = 0; 
     hourHorizontalLines[i * 4 + 1] = i * size; 
     hourHorizontalLines[i * 4 + 2] = getWidth(); 
     hourHorizontalLines[i * 4 + 3] = i * size; 
    } 
    canvas.drawLines(hourHorizontalLines, mPaint); 
} 

}

Answer 1

尝试canvas.save（）和canvas.restore（）

@Override 
protected void onDraw(Canvas canvas) { 
    super.onDraw(canvas); 
    int saveCount = canvas.save(); 
    drawSeparatorsAndBackground(canvas); 
    canvas.restoreToCount(saveCount); 
}