Android - 相机预览
我正在尝试相机预览
这是我的代码,它不会抛出任何错误,但屏幕仍然是黑色的。有什么想法吗?
this.setContentView(R.layout.camerapreview);
SurfaceView cameraSurface = (SurfaceView)findViewById(R.id.cpPreview);
SurfaceHolder holder = cameraSurface.getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
this.camera = Camera.open();
this.camera.setPreviewDisplay(holder);
this.camera.startPreview();
相机预览.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<SurfaceView
android:id="@+id/cpPreview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center">
</SurfaceView>
</LinearLayout>
i'm trying the camera preview
This is my code and it doesn't throw any error, but the screen is still black. Any ideas?
this.setContentView(R.layout.camerapreview);
SurfaceView cameraSurface = (SurfaceView)findViewById(R.id.cpPreview);
SurfaceHolder holder = cameraSurface.getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
this.camera = Camera.open();
this.camera.setPreviewDisplay(holder);
this.camera.startPreview();
camerapreview.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<SurfaceView
android:id="@+id/cpPreview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center">
</SurfaceView>
</LinearLayout>
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您太早调用最后三行了。在调用
setPreviewDisplay()
之前,您必须等待表面准备好,并且在调用之前,您必须等待表面尺寸调整 (
surfaceChanged()
) startPreview()。 这个项目有你需要的。You are calling the last three lines too early. You have to wait for the surface to be prepared before calling
setPreviewDisplay()
and you have to wait for the surface to be sized (surfaceChanged()
) before callingstartPreview()
. This project has what you need.