Question

我的相机预览中未显示自定义视图。无法弄清楚原因。代码运行正常，只有圆圈没有画上它。也搜索了它，但还没有帮助。

主要类

<select is="my-select">
    <option value="1">1</option>
    <option value="2">2</option>
<select>

}

XML类

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

md = (MyDrawing)findViewById(R.id.Drawing);

myContext = this;
initialize();
}

自定义视图

 <?xml version="1.0" encoding="utf-8"?>
 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal"
android:baselineAligned="false">

<FrameLayout
    android:orientation="vertical"
    android:layout_width="404dp"
    android:layout_height="wrap_content"
    android:layout_gravity="start|bottom">

    <Button
        android:id="@+id/button_capture"
        android:layout_width="348dp"
        android:layout_height="wrap_content"
        android:text="Capture/Stop"
        android:layout_gravity="center_horizontal|bottom"
        />

</FrameLayout>

<FrameLayout
    android:id="@+id/camera_preview"
    android:layout_width="match_parent"
    android:layout_height="504dp"
    android:orientation="horizontal">

    <com.javacodegeeks.androidvideocaptureexample.MyDrawing
        android:id="@+id/Drawing"
        android:layout_width="192dp"
        android:layout_height="200dp"
        android:orientation="horizontal"
        android:layout_gravity="center" />

</FrameLayout>


</FrameLayout>

Answer 1

请替换

private void onMeasure()
{
     w = getWidth()/2;
     h = getHeight()/2;
}

与

@Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        w = getWidth()/2;
        h = getHeight()/2;
    }

Answer 2

图层顺序是我所缺少的。刚刚使用了相对布局，并在主要活动代码中也进行了更改。结果是“EUREKA”！

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal"
android:baselineAligned="false">

<FrameLayout
    android:id="@+id/camera_preview"
    android:layout_width="303dp"
    android:layout_height="470dp"
    android:orientation="horizontal"
    android:layout_alignParentRight="true"
    android:layout_alignParentEnd="true"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:layout_alignParentTop="true"
    android:layout_alignBottom="@+id/Drawing">

</FrameLayout>

<Button
    android:id="@+id/button_capture"
    android:layout_width="393dp"
    android:layout_height="92dp"
    android:text="Capture/Stop"
    android:layout_gravity="center_horizontal|bottom"
    android:layout_alignParentBottom="true"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true" />

<com.javacodegeeks.androidvideocaptureexample.MyDrawing
    android:id="@+id/Drawing"
    android:layout_width="500dp"
    android:layout_height="507dp"
    android:orientation="horizontal"
    android:layout_alignParentTop="true"
    />


  </RelativeLayout>

预览自定义视图集成 - Android

2 个答案: