[英]how to Add button to the camera preview android?
I am developing photography app my requrement is overlay effects to camera preview for that i developed code.in this code i overlay image to the surfaceview.我正在开发摄影应用程序,我的要求是叠加效果到我开发的代码的相机预览。在此代码中,我将图像叠加到表面视图。
public class OverlayLiveCamera extends Activity {
Camera camera;
LayoutInflater controlInflater = null;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
Preview mPreview = new Preview(this);
DrawOnTop mDraw = new DrawOnTop(this);
setContentView(mPreview);
addContentView(mDraw, new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
}
class Preview extends SurfaceView implements SurfaceHolder.Callback{
SurfaceHolder mHolder;
Preview(Context context) {
super(context);
// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
mHolder = getHolder();
mHolder.addCallback(this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
public void surfaceCreated(SurfaceHolder holder) {
// The Surface has been created, acquire the camera and tell it where
// to draw.
camera = Camera.open();
try {
camera.setPreviewDisplay(holder);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
// Surface will be destroyed when we return, so stop the preview.
// Because the CameraDevice object is not a shared resource, it's very
// important to release it when the activity is paused.
camera.stopPreview();
camera = null;
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
// Now that the size is known, set up the camera parameters and begin
// the preview.
Camera.Parameters parameters = camera.getParameters();
parameters.setPreviewSize(w, h);
parameters=camera.getParameters();
camera.setParameters(parameters);
camera.startPreview();
}
}
class DrawOnTop extends View {
public DrawOnTop(Context context) {
super(context);
// TODO Auto-generated constructor stub
}
@Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
Bitmap mBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.water);
Paint paint = new Paint();
paint.setAlpha(100);
canvas.drawBitmap(mBitmap, 0, 0, paint);
super.onDraw(canvas);
}
}
my xml code我的 xml 代码
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<SurfaceView android:id="@+id/surfaceView1" android:layout_width="wrap_content" android:layout_height="wrap_content"></SurfaceView>
<LinearLayout android:id="@+id/linearLayout1" android:layout_width="wrap_content" android:layout_height="wrap_content">
<Button android:text="Button" android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
<Button android:text="Button" android:id="@+id/button2" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
</LinearLayout>
</FrameLayout>
for it will surfaceview and overlay image but it will not show button and also when i click button the overlay view capture and save into the sd card.因为它将表面视图和覆盖图像,但它不会显示按钮,而且当我单击按钮时,覆盖视图会捕获并保存到 SD 卡中。
please help me.请帮我。
U can add the button by using below code..你可以使用下面的代码添加按钮..
<FrameLayout android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="2"
android:padding="5dip"
>
<com.commonlib.controls.CameraPreview
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:layout_gravity="center"
android:id="@+id/surface_camera"
/>
<Button android:id="@+id/target"
android:layout_gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="surfacebuttonview"
>
</Button>
</FrameLayout>
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